I was asked to model the handle shown in this brief video: https://youtu.be/2Cl6_5Co-L4 I did a 3D scan, which produced a recognizable version of the handle, but not anything I would give to a customer.  Attempts at improving things using sculpting software (SculptGL) helped a bit, but the scan seems to have a lot of internal errors (voids inside the object) which were revealed when I sliced the scan for printing. It may well be that modeling this in OS is impossible, but I wondered if anyone had an approach that they would suggest. The handle need not be an exact replica, but at least something that is not embarrassing.  Of course, the so-created handle could well interfere with other parts of the assembly (that is, the exact shape may be due to parts around the actuation path of the handle). Note that the counterbore at the non-pointy end, and the six slanted nubs and the through hole are easy enough to model.  It is the graceful shape that eludes me. Thanks! Jon -- This email has been checked for viruses by AVG antivirus software. www.avg.com

On Saturday, May 30, 2026 at 12:32:53 PM EDT, Jon Bondy via Discuss <discuss@lists.openscad.org> wrote: >I was asked to model the handle shown in this brief video: > >https://youtu.be/2Cl6_5Co-L4 My inclination if using OpenSCAD would be to measure the extremities and position suitably sized spheres and hull() them together, repeating this for each feature/angle/portion of perimeter. Iterate and adjust on that until you arrive at something workable? William --  Sphinx of black quartz, judge my vow. https://designinto3d.com/

Anno domini 16:36:31 Sat, 30 May 2026 +0000 (UTC) William F. Adams via Discuss scripsit: > On Saturday, May 30, 2026 at 12:32:53 PM EDT, Jon Bondy via Discuss <discuss@lists.openscad.org> wrote: > > >I was asked to model the handle shown in this brief video: > > > >https://youtu.be/2Cl6_5Co-L4 > > My inclination if using OpenSCAD would be to measure the extremities and position suitably sized spheres and hull() them together, repeating this for each feature/angle/portion of perimeter. > > Iterate and adjust on that until you arrive at something workable? As you already have the 3D scan you import it, make it semitransparent and use it to guide you in the process. Nik > > William > > --  > Sphinx of black quartz, judge my vow. > https://designinto3d.com/ > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org -- Please do not email me anything that you are not comfortable also sharing with the NSA, CIA ...

HI Jon, If you've got it scanned in, good enough that you thought it would slice OK, then i guess you have the shape. I would use Meshlab, or something, to remove the voids. You do not need to learn Meshlab, just ask an AI, to solve that particular problem. If I wanted the fun of using Openscad, then I would take maybe half a dozen photos, with either a ruler, or graphpaper in background, then use a photo editor to get the object images to the same size. A good start, is then to use a top view of the object, and get the 2d points, either measure, or profile tracing/whatever., then the same for a side view. Linear extrude both, rotate one 90degrees, and intersect. There will be a lot of tidying up. If you measured the angles at which you took the other photos, then add those extrudes too. As you like writing software, then make or buy a Renishaw type probe, and fix to your 3d printer. It has been out of patent now, for a number of years, and ones 'good enough' are not too expensive, but interesting to make for the sort of accuracy that is good enough. That will create a useful point cloud, one you can work with and control. Best wishes, Ray On 30/05/2026 17:32, Jon Bondy via Discuss wrote: > I was asked to model the handle shown in this brief video: > > https://youtu.be/2Cl6_5Co-L4 > > I did a 3D scan, which produced a recognizable version of the handle, > but not anything I would give to a customer.  Attempts at improving > things using sculpting software (SculptGL) helped a bit, but the scan > seems to have a lot of internal errors (voids inside the object) which > were revealed when I sliced the scan for printing. > > It may well be that modeling this in OS is impossible, but I wondered > if anyone had an approach that they would suggest. The handle need not > be an exact replica, but at least something that is not embarrassing.  > Of course, the so-created handle could well interfere with other parts > of the assembly (that is, the exact shape may be due to parts around > the actuation path of the handle). > > Note that the counterbore at the non-pointy end, and the six slanted > nubs and the through hole are easy enough to model.  It is the > graceful shape that eludes me. > > Thanks! > > Jon > >

Not fun at all.  I would look at stitching together Bezier patches. https://github.com/BelfrySCAD/BOSL2/wiki/beziers.scad#section-bezier-surfaces

Hi Jon, Can you post some still pictures of this handle? I want to give it a try this weekend Regards On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss < discuss@lists.openscad.org> wrote: > I was asked to model the handle shown in this brief video: > > https://youtu.be/2Cl6_5Co-L4 > > I did a 3D scan, which produced a recognizable version of the handle, > but not anything I would give to a customer. Attempts at improving > things using sculpting software (SculptGL) helped a bit, but the scan > seems to have a lot of internal errors (voids inside the object) which > were revealed when I sliced the scan for printing. > > It may well be that modeling this in OS is impossible, but I wondered if > anyone had an approach that they would suggest. The handle need not be > an exact replica, but at least something that is not embarrassing. Of > course, the so-created handle could well interfere with other parts of > the assembly (that is, the exact shape may be due to parts around the > actuation path of the handle). > > Note that the counterbore at the non-pointy end, and the six slanted > nubs and the through hole are easy enough to model. It is the graceful > shape that eludes me. > > Thanks! > > Jon > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

The part is on its way back to its owner. All I can offer now is that you download the YouTube video and do some screen frame grabs. Jon On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: Hi Jon, Can you post some still pictures of this handle? I want to give it a try this weekend Regards On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss <discuss@lists.openscad.org<mailto:discuss@lists.openscad.org>> wrote: I was asked to model the handle shown in this brief video: https://youtu.be/2Cl6_5Co-L4<https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> I did a 3D scan, which produced a recognizable version of the handle, but not anything I would give to a customer. Attempts at improving things using sculpting software (SculptGL) helped a bit, but the scan seems to have a lot of internal errors (voids inside the object) which were revealed when I sliced the scan for printing. It may well be that modeling this in OS is impossible, but I wondered if anyone had an approach that they would suggest. The handle need not be an exact replica, but at least something that is not embarrassing. Of course, the so-created handle could well interfere with other parts of the assembly (that is, the exact shape may be due to parts around the actuation path of the handle). Note that the counterbore at the non-pointy end, and the six slanted nubs and the through hole are easy enough to model. It is the graceful shape that eludes me. Thanks! Jon -- This email has been checked for viruses by AVG antivirus software. www.avg.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org>

OK no problem I will try On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com, <jon@jonbondy.com> wrote: > The part is on its way back to its owner. All I can offer now is that you > download the YouTube video and do some screen frame grabs. > > Jon > > > On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: > > Hi Jon, > Can you post some still pictures of this handle? > I want to give it a try this weekend > Regards > > On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss < > discuss@lists.openscad.org> wrote: > >> I was asked to model the handle shown in this brief video: >> >> https://youtu.be/2Cl6_5Co-L4 >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >> >> I did a 3D scan, which produced a recognizable version of the handle, >> but not anything I would give to a customer. Attempts at improving >> things using sculpting software (SculptGL) helped a bit, but the scan >> seems to have a lot of internal errors (voids inside the object) which >> were revealed when I sliced the scan for printing. >> >> It may well be that modeling this in OS is impossible, but I wondered if >> anyone had an approach that they would suggest. The handle need not be >> an exact replica, but at least something that is not embarrassing. Of >> course, the so-created handle could well interfere with other parts of >> the assembly (that is, the exact shape may be due to parts around the >> actuation path of the handle). >> >> Note that the counterbore at the non-pointy end, and the six slanted >> nubs and the through hole are easy enough to model. It is the graceful >> shape that eludes me. >> >> Thanks! >> >> Jon >> >> >> -- >> This email has been checked for viruses by AVG antivirus software. >> www.avg.com >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org > >

I tried this today and it took a while very difficult posted the scad file: it is 1.6 mb (strange_shape.scad) https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad associated_python code is attached [image: Screenshot 2026-06-06 at 9.10.37 PM.png] [image: Screenshot 2026-06-06 at 9.12.14 PM.png] [image: Screenshot 2026-06-06 at 9.11.34 PM.png] On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > OK no problem > I will try > > On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com, <jon@jonbondy.com> wrote: > >> The part is on its way back to its owner. All I can offer now is that >> you download the YouTube video and do some screen frame grabs. >> >> Jon >> >> >> On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: >> >> Hi Jon, >> Can you post some still pictures of this handle? >> I want to give it a try this weekend >> Regards >> >> On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss < >> discuss@lists.openscad.org> wrote: >> >>> I was asked to model the handle shown in this brief video: >>> >>> https://youtu.be/2Cl6_5Co-L4 >>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >>> >>> I did a 3D scan, which produced a recognizable version of the handle, >>> but not anything I would give to a customer. Attempts at improving >>> things using sculpting software (SculptGL) helped a bit, but the scan >>> seems to have a lot of internal errors (voids inside the object) which >>> were revealed when I sliced the scan for printing. >>> >>> It may well be that modeling this in OS is impossible, but I wondered if >>> anyone had an approach that they would suggest. The handle need not be >>> an exact replica, but at least something that is not embarrassing. Of >>> course, the so-created handle could well interfere with other parts of >>> the assembly (that is, the exact shape may be due to parts around the >>> actuation path of the handle). >>> >>> Note that the counterbore at the non-pointy end, and the six slanted >>> nubs and the through hole are easy enough to model. It is the graceful >>> shape that eludes me. >>> >>> Thanks! >>> >>> Jon >>> >>> >>> -- >>> This email has been checked for viruses by AVG antivirus software. >>> www.avg.com >>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >>

A very good likeness! On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: I tried this today and it took a while very difficult posted the scad file: it is 1.6 mb (strange_shape.scad) https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> associated_python code is attached [Screenshot 2026-06-06 at 9.10.37 PM.png] [Screenshot 2026-06-06 at 9.12.14 PM.png] [Screenshot 2026-06-06 at 9.11.34 PM.png] On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com<mailto:sprabhakar2006@gmail.com>> wrote: OK no problem I will try On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, <jon@jonbondy.com<mailto:jon@jonbondy.com>> wrote: The part is on its way back to its owner. All I can offer now is that you download the YouTube video and do some screen frame grabs. Jon On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: Hi Jon, Can you post some still pictures of this handle? I want to give it a try this weekend Regards On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss <discuss@lists.openscad.org<mailto:discuss@lists.openscad.org>> wrote: I was asked to model the handle shown in this brief video: https://youtu.be/2Cl6_5Co-L4<https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> I did a 3D scan, which produced a recognizable version of the handle, but not anything I would give to a customer. Attempts at improving things using sculpting software (SculptGL) helped a bit, but the scan seems to have a lot of internal errors (voids inside the object) which were revealed when I sliced the scan for printing. It may well be that modeling this in OS is impossible, but I wondered if anyone had an approach that they would suggest. The handle need not be an exact replica, but at least something that is not embarrassing. Of course, the so-created handle could well interfere with other parts of the assembly (that is, the exact shape may be due to parts around the actuation path of the handle). Note that the counterbore at the non-pointy end, and the six slanted nubs and the through hole are easy enough to model. It is the graceful shape that eludes me. Thanks! Jon -- This email has been checked for viruses by AVG antivirus software. www.avg.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org>

I just have to ask -- what is that part, and what does it do? Also, is the end naturally bent like that, or has it been warn and twisted. Others have walked you through different ways of making this in OpenSCAD. I would have also asked how well did it scan, and then offer some suggestions -- paint it with a light color water-based paint (off-white), and then speckle it with multi-colored dots and lines. 3 to 5 different colors is best. Also, if you play with the lighting to get different deep shadows, this will also help you get good scans. There are all sorts of trick like this to scan. Another, more old-school, was of doing this is to carefully measure different transitions -- like from the half-circle of the head, to the straight profile. Once you had a cross-section measurement, you can make sweeps, triangles, rectangles, etc. Best of luck! EBo -- On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com via Discuss < discuss@lists.openscad.org> wrote: > A very good likeness! > > > On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: > > I tried this today and it took a while > very difficult > posted the scad file: it is 1.6 mb (strange_shape.scad) > https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad > <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> > > associated_python code is attached > [image: Screenshot 2026-06-06 at 9.10.37 PM.png] > [image: Screenshot 2026-06-06 at 9.12.14 PM.png] > [image: Screenshot 2026-06-06 at 9.11.34 PM.png] > > > On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com> > wrote: > >> OK no problem >> I will try >> >> On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, >> <jon@jonbondy.com> wrote: >> >>> The part is on its way back to its owner. All I can offer now is that >>> you download the YouTube video and do some screen frame grabs. >>> >>> Jon >>> >>> >>> On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: >>> >>> Hi Jon, >>> Can you post some still pictures of this handle? >>> I want to give it a try this weekend >>> Regards >>> >>> On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss < >>> discuss@lists.openscad.org> wrote: >>> >>>> I was asked to model the handle shown in this brief video: >>>> >>>> https://youtu.be/2Cl6_5Co-L4 >>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >>>> >>>> I did a 3D scan, which produced a recognizable version of the handle, >>>> but not anything I would give to a customer. Attempts at improving >>>> things using sculpting software (SculptGL) helped a bit, but the scan >>>> seems to have a lot of internal errors (voids inside the object) which >>>> were revealed when I sliced the scan for printing. >>>> >>>> It may well be that modeling this in OS is impossible, but I wondered >>>> if >>>> anyone had an approach that they would suggest. The handle need not be >>>> an exact replica, but at least something that is not embarrassing. Of >>>> course, the so-created handle could well interfere with other parts of >>>> the assembly (that is, the exact shape may be due to parts around the >>>> actuation path of the handle). >>>> >>>> Note that the counterbore at the non-pointy end, and the six slanted >>>> nubs and the through hole are easy enough to model. It is the graceful >>>> shape that eludes me. >>>> >>>> Thanks! >>>> >>>> Jon >>>> >>>> >>>> -- >>>> This email has been checked for viruses by AVG antivirus software. >>>> www.avg.com >>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >>> _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

This handle is used to elevate a pneumatic seat in a modern Ferrari. The shape is pristine, not distorted or bent. I ended up spraying it with foot powder to make the scan, which went OK. The reason I gave up was that, after printing a sample, it became clear to me that I would be unable to make a really good print, because some side was going to have to be down, and thus supported. I know of no FDM printer that prints perfect surfaces above support structures. Good surfaces, yes, but not perfect. The top surface would be seen by the customer, so it needed to look good; the bottom surface had some functional nibs on it, and needed to be perfect. And the gentle curves led to a lot of stair stepping. A challenge all around. Jon On 6/6/2026 3:57 PM, John David wrote: I just have to ask -- what is that part, and what does it do? Also, is the end naturally bent like that, or has it been warn and twisted. Others have walked you through different ways of making this in OpenSCAD. I would have also asked how well did it scan, and then offer some suggestions -- paint it with a light color water-based paint (off-white), and then speckle it with multi-colored dots and lines. 3 to 5 different colors is best. Also, if you play with the lighting to get different deep shadows, this will also help you get good scans. There are all sorts of trick like this to scan. Another, more old-school, was of doing this is to carefully measure different transitions -- like from the half-circle of the head, to the straight profile. Once you had a cross-section measurement, you can make sweeps, triangles, rectangles, etc. Best of luck! EBo -- On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=3sue_gBU8Fo2G35LIkv7_lqGFX9Iw4H_FFYPQv6VPOVfET4b6iru2UwoU1qovXUg&s=j1rVBTqGYuPaLIVmxsph4dUyjj0E-Tw0lpeeMBrDyow&e=> via Discuss <discuss@lists.openscad.org<mailto:discuss@lists.openscad.org>> wrote: A very good likeness! On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: I tried this today and it took a while very difficult posted the scad file: it is 1.6 mb (strange_shape.scad) https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> associated_python code is attached [Screenshot 2026-06-06 at 9.10.37 PM.png] [Screenshot 2026-06-06 at 9.12.14 PM.png] [Screenshot 2026-06-06 at 9.11.34 PM.png] On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com<mailto:sprabhakar2006@gmail.com>> wrote: OK no problem I will try On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, <jon@jonbondy.com<mailto:jon@jonbondy.com>> wrote: The part is on its way back to its owner. All I can offer now is that you download the YouTube video and do some screen frame grabs. Jon On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: Hi Jon, Can you post some still pictures of this handle? I want to give it a try this weekend Regards On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss <discuss@lists.openscad.org<mailto:discuss@lists.openscad.org>> wrote: I was asked to model the handle shown in this brief video: https://youtu.be/2Cl6_5Co-L4<https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> I did a 3D scan, which produced a recognizable version of the handle, but not anything I would give to a customer. Attempts at improving things using sculpting software (SculptGL) helped a bit, but the scan seems to have a lot of internal errors (voids inside the object) which were revealed when I sliced the scan for printing. It may well be that modeling this in OS is impossible, but I wondered if anyone had an approach that they would suggest. The handle need not be an exact replica, but at least something that is not embarrassing. Of course, the so-created handle could well interfere with other parts of the assembly (that is, the exact shape may be due to parts around the actuation path of the handle). Note that the counterbore at the non-pointy end, and the six slanted nubs and the through hole are easy enough to model. It is the graceful shape that eludes me. Thanks! Jon -- This email has been checked for viruses by AVG antivirus software. www.avg.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org>

 A very good likeness!


 On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote:

 I tried this today and it took a while
 very difficult
 posted the scad file: it is 1.6 mb (strange_shape.scad)
 https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=>

 associated_python code is attached
 Screenshot 2026-06-06 at 9.10.37 PM.png
 Screenshot 2026-06-06 at 9.12.14 PM.png
 Screenshot 2026-06-06 at 9.11.34 PM.png


 On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote:

     OK no problem
     I will try

     On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, <jon@jonbondy.com> wrote:

         The part is on its way back to its owner. All I can offer now is that you download the YouTube video and do some screen frame grabs.

         Jon


         On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote:

         Hi Jon,
         Can you post some still pictures of this handle?
         I want to give it a try this weekend
         Regards

         On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss <discuss@lists.openscad.org> wrote:

             I was asked to model the handle shown in this brief video:

             https://youtu.be/2Cl6_5Co-L4 <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=>

             I did a 3D scan, which produced a recognizable version of the handle,
             but not anything I would give to a customer.  Attempts at improving
             things using sculpting software (SculptGL) helped a bit, but the scan
             seems to have a lot of internal errors (voids inside the object) which
             were revealed when I sliced the scan for printing.

             It may well be that modeling this in OS is impossible, but I wondered if
             anyone had an approach that they would suggest. The handle need not be
             an exact replica, but at least something that is not embarrassing.  Of
             course, the so-created handle could well interfere with other parts of
             the assembly (that is, the exact shape may be due to parts around the
             actuation path of the handle).

             Note that the counterbore at the non-pointy end, and the six slanted
             nubs and the through hole are easy enough to model.  It is the graceful
             shape that eludes me.

             Thanks!

             Jon


             -- 
             This email has been checked for viruses by AVG antivirus software.
             www.avg.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=>
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Jon, being inside a car with the associated high temperature, I am assuming ASA filament, so would vapour-smoothing the finished handle with acetone have made it more acceptable? For example- https://www.3dsourced.com/rigid-ink/acetone-vapor-smooth-3d-prints-abs-asa/ On 7/6/26 07:21, jon jonbondy.com via Discuss wrote: > > This handle is used to elevate a pneumatic seat in a modern Ferrari.  The shape is pristine, not distorted or bent.  I ended up spraying it with foot powder to make the scan, which went OK.  The reason I gave up was that, after printing a sample, it became clear to me that I would be unable to make a really good print, because some side was going to have to be down, and thus supported.  I know of no FDM printer that prints perfect surfaces above support structures.  Good surfaces, yes, but not perfect.  The top surface would be seen by the customer, so it needed to look good; the bottom surface had some functional nibs on it, and needed to be perfect.  And the gentle curves led to a lot of stair stepping.  A challenge all around. > > Jon > > > On 6/6/2026 3:57 PM, John David wrote: >> I just have to ask -- what is that part, and what does it do?  Also, is the end naturally bent like that, or has it been warn and twisted. >> >> Others have walked you through different ways of making this in OpenSCAD.  I would have also asked how well did it scan, and then offer some suggestions -- paint it with a light color water-based paint (off-white), and then speckle it with multi-colored dots and lines.  3 to 5 different colors is best.  Also, if you play with the lighting to get different deep shadows, this will also help you get good scans.  There are all sorts of trick like this to scan. >> >> Another, more old-school, was of doing this is to carefully measure different transitions -- like from the half-circle of the head, to the straight profile.  Once you had a cross-section measurement, you can make sweeps, triangles, rectangles, etc. >> >> Best of luck! >> >>   EBo -- >> >> On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=3sue_gBU8Fo2G35LIkv7_lqGFX9Iw4H_FFYPQv6VPOVfET4b6iru2UwoU1qovXUg&s=j1rVBTqGYuPaLIVmxsph4dUyjj0E-Tw0lpeeMBrDyow&e=> via Discuss <discuss@lists.openscad.org> wrote: >> >> A very good likeness! >> >> >> On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: >>> I tried this today and it took a while >>> very difficult >>> posted the scad file: it is 1.6 mb (strange_shape.scad) >>> https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> >>> >>> associated_python code is attached >>> Screenshot 2026-06-06 at 9.10.37 PM.png >>> Screenshot 2026-06-06 at 9.12.14 PM.png >>> Screenshot 2026-06-06 at 9.11.34 PM.png >>> >>> >>> On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: >>> >>> OK no problem >>> I will try >>> >>> On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, <jon@jonbondy.com> wrote: >>> >>> The part is on its way back to its owner. All I can offer now is that you download the YouTube video and do some screen frame grabs. >>> >>> Jon >>> >>> >>> On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: >>>> Hi Jon, >>>> Can you post some still pictures of this handle? >>>> I want to give it a try this weekend >>>> Regards >>>> >>>> On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss <discuss@lists.openscad.org> wrote: >>>> >>>> I was asked to model the handle shown in this brief video: >>>> >>>> https://youtu.be/2Cl6_5Co-L4 <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >>>> >>>> I did a 3D scan, which produced a recognizable version of the handle, >>>> but not anything I would give to a customer.  Attempts at improving >>>> things using sculpting software (SculptGL) helped a bit, but the scan >>>> seems to have a lot of internal errors (voids inside the object) which >>>> were revealed when I sliced the scan for printing. >>>> >>>> It may well be that modeling this in OS is impossible, but I wondered if >>>> anyone had an approach that they would suggest. The handle need not be >>>> an exact replica, but at least something that is not embarrassing.  Of >>>> course, the so-created handle could well interfere with other parts of >>>> the assembly (that is, the exact shape may be due to parts around the >>>> actuation path of the handle). >>>> >>>> Note that the counterbore at the non-pointy end, and the six slanted >>>> nubs and the through hole are easy enough to model.  It is the graceful >>>> shape that eludes me. >>>> >>>> Thanks! >>>> >>>> Jon >>>> >>>> >>>> -- >>>> This email has been checked for viruses by AVG antivirus software. >>>> www.avg.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >>>> _______________________________________________ >>>> OpenSCAD mailing list >>>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>>> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org -- Cheers, Ken bats059@gmail.com https://vk7krj.com https://vk7krj.com/running.html ---------------------------------------- A baby can be defined as an ego with a noise at one end and a smell at the other. Your job as parents is to teach them to control all three. My job as a grandad is to tell you how you are doing it all wrong!

Also if you can do a support interface layer in soluble filament then it can be fully dense and fully in contact with the part. That would leave no blemishes. On Sun, 7 Jun 2026 at 03:16, Ken via Discuss <discuss@lists.openscad.org> wrote: > Jon, being inside a car with the associated high temperature, I am > assuming ASA filament, so would vapour-smoothing the finished handle with > acetone have made it more acceptable? > > For example- > https://www.3dsourced.com/rigid-ink/acetone-vapor-smooth-3d-prints-abs-asa/ > > > > On 7/6/26 07:21, jon jonbondy.com via Discuss wrote: > > This handle is used to elevate a pneumatic seat in a modern Ferrari. The > shape is pristine, not distorted or bent. I ended up spraying it with foot > powder to make the scan, which went OK. The reason I gave up was that, > after printing a sample, it became clear to me that I would be unable to > make a really good print, because some side was going to have to be down, > and thus supported. I know of no FDM printer that prints perfect surfaces > above support structures. Good surfaces, yes, but not perfect. The top > surface would be seen by the customer, so it needed to look good; the > bottom surface had some functional nibs on it, and needed to be perfect. > And the gentle curves led to a lot of stair stepping. A challenge all > around. > > Jon > > > On 6/6/2026 3:57 PM, John David wrote: > > I just have to ask -- what is that part, and what does it do? Also, is > the end naturally bent like that, or has it been warn and twisted. > > Others have walked you through different ways of making this in OpenSCAD. > I would have also asked how well did it scan, and then offer some > suggestions -- paint it with a light color water-based paint (off-white), > and then speckle it with multi-colored dots and lines. 3 to 5 different > colors is best. Also, if you play with the lighting to get different deep > shadows, this will also help you get good scans. There are all sorts of > trick like this to scan. > > Another, more old-school, was of doing this is to carefully measure > different transitions -- like from the half-circle of the head, to the > straight profile. Once you had a cross-section measurement, you can make > sweeps, triangles, rectangles, etc. > > Best of luck! > > EBo -- > > On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com > <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=3sue_gBU8Fo2G35LIkv7_lqGFX9Iw4H_FFYPQv6VPOVfET4b6iru2UwoU1qovXUg&s=j1rVBTqGYuPaLIVmxsph4dUyjj0E-Tw0lpeeMBrDyow&e=> > via Discuss <discuss@lists.openscad.org> wrote: > >> A very good likeness! >> >> >> On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: >> >> I tried this today and it took a while >> very difficult >> posted the scad file: it is 1.6 mb (strange_shape.scad) >> https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> >> >> associated_python code is attached >> [image: Screenshot 2026-06-06 at 9.10.37 PM.png] >> [image: Screenshot 2026-06-06 at 9.12.14 PM.png] >> [image: Screenshot 2026-06-06 at 9.11.34 PM.png] >> >> >> On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar <sprabhakar2006@gmail.com> >> wrote: >> >>> OK no problem >>> I will try >>> >>> On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com >>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, >>> <jon@jonbondy.com> wrote: >>> >>>> The part is on its way back to its owner. All I can offer now is that >>>> you download the YouTube video and do some screen frame grabs. >>>> >>>> Jon >>>> >>>> >>>> On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: >>>> >>>> Hi Jon, >>>> Can you post some still pictures of this handle? >>>> I want to give it a try this weekend >>>> Regards >>>> >>>> On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss < >>>> discuss@lists.openscad.org> wrote: >>>> >>>>> I was asked to model the handle shown in this brief video: >>>>> >>>>> https://youtu.be/2Cl6_5Co-L4 >>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >>>>> >>>>> I did a 3D scan, which produced a recognizable version of the handle, >>>>> but not anything I would give to a customer. Attempts at improving >>>>> things using sculpting software (SculptGL) helped a bit, but the scan >>>>> seems to have a lot of internal errors (voids inside the object) which >>>>> were revealed when I sliced the scan for printing. >>>>> >>>>> It may well be that modeling this in OS is impossible, but I wondered >>>>> if >>>>> anyone had an approach that they would suggest. The handle need not be >>>>> an exact replica, but at least something that is not embarrassing. Of >>>>> course, the so-created handle could well interfere with other parts of >>>>> the assembly (that is, the exact shape may be due to parts around the >>>>> actuation path of the handle). >>>>> >>>>> Note that the counterbore at the non-pointy end, and the six slanted >>>>> nubs and the through hole are easy enough to model. It is the >>>>> graceful >>>>> shape that eludes me. >>>>> >>>>> Thanks! >>>>> >>>>> Jon >>>>> >>>>> >>>>> -- >>>>> This email has been checked for viruses by AVG antivirus software. >>>>> www.avg.com >>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >>>>> _______________________________________________ >>>>> OpenSCAD mailing list >>>>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>>> >>>> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > -- > Cheers, Kenbats059@gmail.comhttps://vk7krj.comhttps://vk7krj.com/running.html > ---------------------------------------- > A baby can be defined as an ego with a noise at one end and a smell at the other. > Your job as parents is to teach them to control all three. > My job as a grandad is to tell you how you are doing it all wrong! > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

 A very good likeness!


 On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote:

 I tried this today and it took a while
 very difficult
 posted the scad file: it is 1.6 mb (strange_shape.scad)
 https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad
 <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=>

 associated_python code is attached
 Screenshot 2026-06-06 at 9.10.37 PM.png
 Screenshot 2026-06-06 at 9.12.14 PM.png
 Screenshot 2026-06-06 at 9.11.34 PM.png


 On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar
 <sprabhakar2006@gmail.com> wrote:

     OK no problem
     I will try

     On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com
     <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>,
     <jon@jonbondy.com> wrote:

         The part is on its way back to its owner.  All I can
         offer now is that you download the YouTube video and do
         some screen frame grabs.

         Jon


         On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote:

         Hi Jon,
         Can you post some still pictures of this handle?
         I want to give it a try this weekend
         Regards

         On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss
         <discuss@lists.openscad.org> wrote:

             I was asked to model the handle shown in this
             brief video:

             https://youtu.be/2Cl6_5Co-L4
             <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=>

             I did a 3D scan, which produced a recognizable
             version of the handle,
             but not anything I would give to a customer. 
             Attempts at improving
             things using sculpting software (SculptGL) helped
             a bit, but the scan
             seems to have a lot of internal errors (voids
             inside the object) which
             were revealed when I sliced the scan for printing.

             It may well be that modeling this in OS is
             impossible, but I wondered if
             anyone had an approach that they would suggest.
             The handle need not be
             an exact replica, but at least something that is
             not embarrassing. Of
             course, the so-created handle could well interfere
             with other parts of
             the assembly (that is, the exact shape may be due
             to parts around the
             actuation path of the handle).

             Note that the counterbore at the non-pointy end,
             and the six slanted
             nubs and the through hole are easy enough to
             model.  It is the graceful
             shape that eludes me.

             Thanks!

             Jon


             -- 
             This email has been checked for viruses by AVG
             antivirus software.
             www.avg.com
             <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=>
             _______________________________________________
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             discuss-leave@lists.openscad.org

 _______________________________________________
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 To unsubscribe send an email to discuss-leave@lists.openscad.org

I considered a variety of post processing techniques (sanding, epoxy coating), but the printer was barely able to print the details required for the "nubs".  I think it was just not meant to be.  This was at 0.2 mm layer height, so more detail was possible, but surfaces above support are never pretty, just occasionally tolerable. On 6/6/2026 10:15 PM, Ken via Discuss wrote: > Jon, being inside a car with the associated high temperature, I am > assuming ASA filament, so would vapour-smoothing the finished > handle with acetone have made it more acceptable? > > For example- > https://www.3dsourced.com/rigid-ink/acetone-vapor-smooth-3d-prints-abs-asa/ > > > > On 7/6/26 07:21, jon jonbondy.com via Discuss wrote: >> >> This handle is used to elevate a pneumatic seat in a modern Ferrari.  >> The shape is pristine, not distorted or bent.  I ended up spraying it >> with foot powder to make the scan, which went OK.  The reason I gave >> up was that, after printing a sample, it became clear to me that I >> would be unable to make a really good print, because some side was >> going to have to be down, and thus supported.  I know of no FDM >> printer that prints perfect surfaces above support structures.  Good >> surfaces, yes, but not perfect.  The top surface would be seen by the >> customer, so it needed to look good; the bottom surface had some >> functional nibs on it, and needed to be perfect.  And the gentle >> curves led to a lot of stair stepping.  A challenge all around. >> >> Jon >> >> >> On 6/6/2026 3:57 PM, John David wrote: >>> I just have to ask -- what is that part, and what does it do?  Also, >>> is the end naturally bent like that, or has it been warn and twisted. >>> >>> Others have walked you through different ways of making this in >>> OpenSCAD.  I would have also asked how well did it scan, and then >>> offer some suggestions -- paint it with a light color water-based >>> paint (off-white), and then speckle it with multi-colored dots and >>> lines.  3 to 5 different colors is best.  Also, if you play with the >>> lighting to get different deep shadows, this will also help you get >>> good scans.  There are all sorts of trick like this to scan. >>> >>> Another, more old-school, was of doing this is to carefully measure >>> different transitions -- like from the half-circle of the head, to >>> the straight profile.  Once you had a cross-section measurement, you >>> can make sweeps, triangles, rectangles, etc. >>> >>> Best of luck! >>> >>>   EBo -- >>> >>> On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com >>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=3sue_gBU8Fo2G35LIkv7_lqGFX9Iw4H_FFYPQv6VPOVfET4b6iru2UwoU1qovXUg&s=j1rVBTqGYuPaLIVmxsph4dUyjj0E-Tw0lpeeMBrDyow&e=> >>> via Discuss <discuss@lists.openscad.org> wrote: >>> >>> A very good likeness! >>> >>> >>> On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: >>>> I tried this today and it took a while >>>> very difficult >>>> posted the scad file: it is 1.6 mb (strange_shape.scad) >>>> https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad >>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_sprabhakar2006_openSCAD_blob_main_strange-5Fshape.scad&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=FoY3gJudRGyPkmPBkF9EtixlL47PTgipiosfMTg4Id0&e=> >>>> >>>> associated_python code is attached >>>> Screenshot 2026-06-06 at 9.10.37 PM.png >>>> Screenshot 2026-06-06 at 9.12.14 PM.png >>>> Screenshot 2026-06-06 at 9.11.34 PM.png >>>> >>>> >>>> On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar >>>> <sprabhakar2006@gmail.com> wrote: >>>> >>>> OK no problem >>>> I will try >>>> >>>> On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com >>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__jonbondy.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=9Vu-I-8lkbmP2hkkNkZhZEquxy-DGAf7E0uatGsET1tdBD4kP8Ltr6N0UmCTS-m4&s=zyMJSqOUqMC-3SbFgiS8uQv2MjufDTZmgcG47vNgfys&e=>, >>>> <jon@jonbondy.com> wrote: >>>> >>>> The part is on its way back to its owner.  All I can >>>> offer now is that you download the YouTube video and do >>>> some screen frame grabs. >>>> >>>> Jon >>>> >>>> >>>> On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: >>>>> Hi Jon, >>>>> Can you post some still pictures of this handle? >>>>> I want to give it a try this weekend >>>>> Regards >>>>> >>>>> On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss >>>>> <discuss@lists.openscad.org> wrote: >>>>> >>>>> I was asked to model the handle shown in this >>>>> brief video: >>>>> >>>>> https://youtu.be/2Cl6_5Co-L4 >>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__youtu.be_2Cl6-5F5Co-2DL4&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=RuNeweI0Jbo4vsEmcA9KQPXahlcgRZsdaWI3e_hOoKA&e=> >>>>> >>>>> I did a 3D scan, which produced a recognizable >>>>> version of the handle, >>>>> but not anything I would give to a customer.  >>>>> Attempts at improving >>>>> things using sculpting software (SculptGL) helped >>>>> a bit, but the scan >>>>> seems to have a lot of internal errors (voids >>>>> inside the object) which >>>>> were revealed when I sliced the scan for printing. >>>>> >>>>> It may well be that modeling this in OS is >>>>> impossible, but I wondered if >>>>> anyone had an approach that they would suggest. >>>>> The handle need not be >>>>> an exact replica, but at least something that is >>>>> not embarrassing. Of >>>>> course, the so-created handle could well interfere >>>>> with other parts of >>>>> the assembly (that is, the exact shape may be due >>>>> to parts around the >>>>> actuation path of the handle). >>>>> >>>>> Note that the counterbore at the non-pointy end, >>>>> and the six slanted >>>>> nubs and the through hole are easy enough to >>>>> model.  It is the graceful >>>>> shape that eludes me. >>>>> >>>>> Thanks! >>>>> >>>>> Jon >>>>> >>>>> >>>>> -- >>>>> This email has been checked for viruses by AVG >>>>> antivirus software. >>>>> www.avg.com >>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=PCh_CDD_4ZaWo2eqN5GZU2oDJPZRmy4wmw_LBJfS4y31P0aivtBb1TA-HPEy-XTe&s=aIG_B2Jt4cW6KKAzsay5ILK6SlSoSJ0jK6YfLJWn4OU&e=> >>>>> _______________________________________________ >>>>> OpenSCAD mailing list >>>>> To unsubscribe send an email to >>>>> discuss-leave@lists.openscad.org >>>>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email todiscuss-leave@lists.openscad.org > > -- > Cheers, Ken > bats059@gmail.com > https://vk7krj.com > https://vk7krj.com/running.html > ---------------------------------------- > A baby can be defined as an ego with a noise at one end and a smell at the other. > Your job as parents is to teach them to control all three. > My job as a grandad is to tell you how you are doing it all wrong! > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Type: Tree (auto) - (I use this on average but it depends on the

Style: Tree Organic or Slim - (I use these on average but it

Top Z distance: 0.25mm
Bottom Z distance: 0.2mm
Base pattern spacing: 2.5mm
Base Pattern: Hollow. - THIS IS A KEY SETTING
Top interface layers: 3
Bottom interface layers: 2
Top interface spacing: 0.7mm

On Sun, 2026-06-07 at 08:48 -0400, Jon Bondy via Discuss wrote: > I considered a variety of post processing techniques (sanding, epoxy > coating), but the printer was barely able to print the details > required for the "nubs".  I think it was just not meant to be.  This > was at 0.2 mm layer height, so more detail was possible, but surfaces > above support are never pretty, just occasionally tolerable. Here's something that made my support surfaces very nice, and that was using only one filament for model and supports. It's was for a Bambu Lab printer, but I think it's generic enough to be worth trying on any printer. Cribbed from TotalWarHammer, from a post on Reddit GUIDE: How to produce easy to remove supports every time... Firstly, I am not saying this is brand new information, but it really worked for me with my PLA+ (all brands) that I use to print so I want to share the knowledge and hopefully help people. I have found that the way to repeatedly and consistently produce easy to remove supports for my minis and terrain prints is by having settings in Bambu Studio as follows: Line width for supports (in Quality settings): 'Around 50%' of what your main line width is (eg: set it to 0.25mm on a 0.4mm nozzle printing at 0.42mm line width) - THIS IS A KEY SETTING - UPDATE For 0.2mm nozzles do not change this setting it's already good and setting it any thinner will cause issues! Type: Tree (auto) - (I use this on average but it depends on the model so experiment with each type depending on your needs) Style: Tree Organic or Slim - (I use these on average but it depends on the model so experiment with each type depending on your needs) Top Z distance: 0.25mm Bottom Z distance: 0.2mm Base pattern spacing: 2.5mm Base Pattern: Hollow. - THIS IS A KEY SETTING Top interface layers: 3 Bottom interface layers: 2 Top interface spacing: 0.7mm Additional settings I always use for print stability and avoiding warping, especially for longer-length prints or that are located on build plate edges. The brim keeps the print stable and comes off super easily! Brim type: Outer brim only Brim width: 3mm Brim-object gap: 0.3mm FINALLY: LET YOUR MODELS FULLY COOL AFTER PRINTING. I MEAN IT... FULLY FULLY COOLED! This produces easy to remove supports in almost every use case I have experienced when printing minis and larger terrain items. The two key settings were reducing line width for supports to almost half of the main line width, and making the supports hollow. This means that when using thicker nozzles like 0.4mm you do not get supports that are tough to remove and can generally easily be crushed and picked off. Sadly my 0.2mm nozzle is clogged since months and I need to buy another, but I am sure you would get similar results there too. > On 6/6/2026 10:15 PM, Ken via Discuss wrote: >   > >  Jon, being inside a car with the associated high temperature, I am > > assuming ASA filament, so would vapour-smoothing the finished > > handle with acetone have made it more acceptable? > >   > >  For example- > >   > > https://www.3dsourced.com/rigid-ink/acetone-vapor-smooth-3d-prints- > > abs-asa/ > >   > >   > > > > On 7/6/26 07:21, jon jonbondy.com via Discuss wrote: > >   > > > This handle is used to elevate a pneumatic seat in a modern > > > Ferrari.  The shape is pristine, not distorted or bent.  I ended > > > up spraying it with foot powder to make the scan, which went OK.  > > > The reason I gave up was that, after printing a sample, it became > > > clear to me that I would be unable to make a really good print, > > > because some side was going to have to be down, and thus > > > supported.  I know of no FDM printer that prints perfect surfaces > > > above support structures.  Good surfaces, yes, but not perfect.  > > > The top surface would be seen by the customer, so it needed to > > > look good; the bottom surface had some functional nibs on it, and > > > needed to be perfect.  And the gentle curves led to a lot of > > > stair stepping.  A challenge all around. > > > Jon > > > > > > On 6/6/2026 3:57 PM, John David wrote: > > >   > > > > I just have to ask -- what is that part, and what does it do?  > > > > Also, is the end naturally bent like that, or has it been warn > > > > and twisted. > > > > > > > > Others have walked you through different ways of making this in > > > > OpenSCAD.  I would have also asked how well did it scan, and > > > > then offer some suggestions -- paint it with a light color > > > > water-based paint (off-white), and then speckle it with multi- > > > > colored dots and lines.  3 to 5 different colors is best.  > > > > Also, if you play with the lighting to get different deep > > > > shadows, this will also help you get good scans.  There are all > > > > sorts of trick like this to scan. > > > > > > > > Another, more old-school, was of doing this is to carefully > > > > measure different transitions -- like from the half-circle of > > > > the head, to the straight profile.  Once you had a cross- > > > > section measurement, you can make sweeps, triangles, > > > > rectangles, etc. > > > > > > > > Best of luck! > > > > > > > >   EBo -- > > > >   > > > > On Sat, Jun 6, 2026 at 2:03 PM jon jonbondy.com via Discuss > > > > <discuss@lists.openscad.org> wrote: > > > >   > > > > > A very good likeness! > > > > > > > > > > On 6/6/2026 12:00 PM, Sanjeev Prabhakar wrote: > > > > >   > > > > > > I tried this today and it took a while > > > > > > very difficult > > > > > > posted the scad file: it is 1.6 mb (strange_shape.scad)  > > > > > > https://github.com/sprabhakar2006/openSCAD/blob/main/strange_shape.scad > > > > > > > > > > > > associated_python code is attached > > > > > > Screenshot 2026-06-06 at 9.10.37 PM.png > > > > > >  Screenshot 2026-06-06 at 9.12.14 PM.png > > > > > >  Screenshot 2026-06-06 at 9.11.34 PM.png > > > > > > > > > > > >   > > > > > > On Wed, 3 Jun 2026 at 06:03, Sanjeev Prabhakar > > > > > > <sprabhakar2006@gmail.com> wrote: > > > > > >   > > > > > > > OK no problem > > > > > > > I will try > > > > > > >   > > > > > > > On Wed, 3 Jun, 2026, 3:59 am jon jonbondy.com, > > > > > > > <jon@jonbondy.com> wrote: > > > > > > >   > > > > > > > > The part is on its way back to its owner.  All I can > > > > > > > > offer now is that you download the YouTube video and do > > > > > > > > some screen frame grabs. > > > > > > > > Jon > > > > > > > > > > > > > > > > On 6/2/2026 11:00 AM, Sanjeev Prabhakar wrote: > > > > > > > >   > > > > > > > > > Hi Jon, > > > > > > > > >  Can you post some still pictures of this handle? > > > > > > > > > I want to give it a try this weekend > > > > > > > > > Regards > > > > > > > > >   > > > > > > > > > On Sat, 30 May 2026 at 22:03, Jon Bondy via Discuss > > > > > > > > > <discuss@lists.openscad.org> wrote: > > > > > > > > >   > > > > > > > > > >  I was asked to model the handle shown in this > > > > > > > > > > brief video: > > > > > > > > > >   > > > > > > > > > >  https://youtu.be/2Cl6_5Co-L4 > > > > > > > > > >   > > > > > > > > > >  I did a 3D scan, which produced a recognizable > > > > > > > > > > version of the handle, > > > > > > > > > >  but not anything I would give to a customer.  > > > > > > > > > > Attempts at improving > > > > > > > > > >  things using sculpting software (SculptGL) helped > > > > > > > > > > a bit, but the scan > > > > > > > > > >  seems to have a lot of internal errors (voids > > > > > > > > > > inside the object) which > > > > > > > > > >  were revealed when I sliced the scan for printing. > > > > > > > > > >   > > > > > > > > > >  It may well be that modeling this in OS is > > > > > > > > > > impossible, but I wondered if > > > > > > > > > >  anyone had an approach that they would suggest. > > > > > > > > > > The handle need not be > > > > > > > > > >  an exact replica, but at least something that is > > > > > > > > > > not embarrassing.  Of > > > > > > > > > >  course, the so-created handle could well interfere > > > > > > > > > > with other parts of > > > > > > > > > >  the assembly (that is, the exact shape may be due > > > > > > > > > > to parts around the > > > > > > > > > >  actuation path of the handle). > > > > > > > > > >   > > > > > > > > > >  Note that the counterbore at the non-pointy end, > > > > > > > > > > and the six slanted > > > > > > > > > >  nubs and the through hole are easy enough to > > > > > > > > > > model.  It is the graceful > > > > > > > > > >  shape that eludes me. > > > > > > > > > >   > > > > > > > > > >  Thanks! > > > > > > > > > >   > > > > > > > > > >  Jon > > > > > > > > > >   > > > > > > > > > >   > > > > > > > > > >  -- > > > > > > > > > >  This email has been checked for viruses by AVG > > > > > > > > > > antivirus software. > > > > > > > > > >  www.avg.com > > > > > > > > > > _______________________________________________ > > > > > > > > > >  OpenSCAD mailing list > > > > > > > > > >  To unsubscribe send an email to > > > > > > > > > > discuss-leave@lists.openscad.org > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  _______________________________________________ > > > > >  OpenSCAD mailing list > > > > >  To unsubscribe send an email to > > > > > discuss-leave@lists.openscad.org > > > > > > > >   > > >   > > > _______________________________________________ > > > OpenSCAD mailing list > > > To unsubscribe send an email to discuss-leave@lists.openscad.org > >   > > _______________________________________________ > > OpenSCAD mailing list > > To unsubscribe send an email to discuss-leave@lists.openscad.org

Larry: Thanks.  I do not have a problem removing supports when printed on my Bambu printers, but the surface quality of the print is always worse above support than above the build plate or on the top surface. Jon On 6/7/2026 12:01 PM, larry via Discuss wrote: > On Sun, 2026-06-07 at 08:48 -0400, Jon Bondy via Discuss wrote: >> I considered a variety of post processing techniques (sanding, epoxy >> coating), but the printer was barely able to print the details >> required for the "nubs". I think it was just not meant to be. This >> was at 0.2 mm layer height, so more detail was possible, but surfaces >> above support are never pretty, just occasionally tolerable. > Here's something that made my support surfaces very nice, and that was > using only one filament for model and supports. It's was for a Bambu > Lab printer, but I think it's generic enough to be worth trying on any > printer. > > Cribbed from TotalWarHammer, from a post on Reddit > > GUIDE: How to produce easy to remove supports every time... > > <snip> -- This email has been checked for viruses by AVG antivirus software. www.avg.com

You probably need less gap between the support and the layer above. That will make them harder to remove but leave a better layer above. On Mon, 8 Jun 2026, 11:52 Jon Bondy via Discuss, <discuss@lists.openscad.org> wrote: > Larry: > > Thanks. I do not have a problem removing supports when printed on my > Bambu printers, but the surface quality of the print is always worse > above support than above the build plate or on the top surface. > > Jon > > On 6/7/2026 12:01 PM, larry via Discuss wrote: > > On Sun, 2026-06-07 at 08:48 -0400, Jon Bondy via Discuss wrote: > >> I considered a variety of post processing techniques (sanding, epoxy > >> coating), but the printer was barely able to print the details > >> required for the "nubs". I think it was just not meant to be. This > >> was at 0.2 mm layer height, so more detail was possible, but surfaces > >> above support are never pretty, just occasionally tolerable. > > Here's something that made my support surfaces very nice, and that was > > using only one filament for model and supports. It's was for a Bambu > > Lab printer, but I think it's generic enough to be worth trying on any > > printer. > > > > Cribbed from TotalWarHammer, from a post on Reddit > > > > GUIDE: How to produce easy to remove supports every time... > > > > <snip> > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

If you have an AMS you can print the topmost support layers in a different material (PETG when the model is PLA). Doing so you can totally omit the gap and get a perfectly smooth supported surface. This works because PLA and PETG don't connect well when printed on top of each other. See https://www.youtube.com/watch?v=KVi2z1ODdBM for an example. > Am 08.06.2026 um 12:51 schrieb Jon Bondy via Discuss <discuss@lists.openscad.org>: > > Larry: > > Thanks. I do not have a problem removing supports when printed on my Bambu printers, but the surface quality of the print is always worse above support than above the build plate or on the top surface. > > Jon > > On 6/7/2026 12:01 PM, larry via Discuss wrote: >> On Sun, 2026-06-07 at 08:48 -0400, Jon Bondy via Discuss wrote: >>> I considered a variety of post processing techniques (sanding, epoxy >>> coating), but the printer was barely able to print the details >>> required for the "nubs". I think it was just not meant to be. This >>> was at 0.2 mm layer height, so more detail was possible, but surfaces >>> above support are never pretty, just occasionally tolerable. >> Here's something that made my support surfaces very nice, and that was >> using only one filament for model and supports. It's was for a Bambu >> Lab printer, but I think it's generic enough to be worth trying on any >> printer. >> >> Cribbed from TotalWarHammer, from a post on Reddit >> >> GUIDE: How to produce easy to remove supports every time... >> >> <snip> > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org