CPU is getting hot: can I pause rendering proces?
I use openscad since a few month and I did not buy a laptop that was prepared
for that.
The CPU has to work quite hard for the rendering proces.
I often get the warning that I have heating problems and that I have to turn
off the laptop immediately.
Problem is that the rendering sometimes takes quite long and cannot be
paused, I think. Or is there a trick to do that?
http://forum.openscad.org/file/n17384/hot_processor.jpg
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Also the viewing after F5 takes a lot of CPU capacity.
Is it possible to stop the viewing process?
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17385.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
You should consider that a typical computer is designed to remove heat in
such a manner as to never have the type of message you are seeing unless
there is something wrong.
If this is an older laptop, you could have too much dust on the cooling fins
within the laptop. With the power turned off, use an air stream from a can
of air or air compressor and apply it to the vents on the underside and/or
back of your laptop. Use very short bursts of air, as you do not want to
force the internal fan to spin at high speed, which would happen with long
bursts of air. If you perform this task in a well-lighted area, you will see
dust from the exit vents.
If this does not cause your machine to run cooler, it is possible that the
heat sink thermal paste has dried out, especially if this is an older
laptop. That is more complicated to fix, as it is necessary to disassemble
entirely the laptop. The thermal transfer assembly must be removed from the
processor, all surfaces cleaned and thermal transfer paste re-applied, then
re-assembled.
Perhaps you will get lucky and find it needs only to have the dust removed.
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17386.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
I was always taught that vacuum (sucking) was better than blowing,
because the latter can force things to get jammed into place, while
vacuum pulls things out. I may be wrong.
If you can identify where the warm air is exiting from your laptop,
another possibility is to position a fairly strong muffin fan right next
to the laptop, so that it pulls more air through the cooling system.
Not elegant or convenient, but it might get you through this particular
incident.
Jon
On 5/21/2016 8:03 AM, fred_dot_u wrote:
You should consider that a typical computer is designed to remove heat in
such a manner as to never have the type of message you are seeing unless
there is something wrong.
If this is an older laptop, you could have too much dust on the cooling fins
within the laptop. With the power turned off, use an air stream from a can
of air or air compressor and apply it to the vents on the underside and/or
back of your laptop. Use very short bursts of air, as you do not want to
force the internal fan to spin at high speed, which would happen with long
bursts of air. If you perform this task in a well-lighted area, you will see
dust from the exit vents.
If this does not cause your machine to run cooler, it is possible that the
heat sink thermal paste has dried out, especially if this is an older
laptop. That is more complicated to fix, as it is necessary to disassemble
entirely the laptop. The thermal transfer assembly must be removed from the
processor, all surfaces cleaned and thermal transfer paste re-applied, then
re-assembled.
Perhaps you will get lucky and find it needs only to have the dust removed.
For the cooling system in a laptop, the airflow is limited to the fans and
fins and it's more difficult to vacuum dust than it is to direct an air
stream to dislodge the particles. For the fun of it, on a throw-away laptop,
I used high pressure air for a long period of time and destroyed the fan. It
sounded like a turbine engine until it didn't. I probably overheated any
bearings or contact surfaces, but it was a throw-away, so no real harm done.
In a desktop computer, the air from a compressor hose or can is dispersed
more widely, but still dislodges the dust. Using a vacuum has a higher
chance to suck or break a component.
Occasionally, I've had to re-seat memory chips after blowing dust from a
desktop computer.
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17388.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Another note, if the problem is dust or dried thermal transfer paste, an
additional external fan will not resolve the overheating. There is
insufficient heat transfer with the current air flow, but it's not likely
related to insufficient airflow.
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17389.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Maybe you can under-clock your processor.
2016-05-21 14:21 GMT+02:00 fred_dot_u fred_dot_u@yahoo.com:
Another note, if the problem is dust or dried thermal transfer paste, an
additional external fan will not resolve the overheating. There is
insufficient heat transfer with the current air flow, but it's not likely
related to insufficient airflow.
--
View this message in context:
http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17389.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
Johan Jonker wrote
Problem is that the rendering sometimes takes quite long and cannot be
paused, I think. Or is there a trick to do that?
Also the viewing after F5 takes a lot of CPU capacity.
Is it possible to stop the viewing process?
For F6 render, there is a small close icon (X in a circle) at the end of the
progress bar after the n/1000, however, it is only tested between CGAL
calls, if CGAL is in a lengthy operation it can take a long time.
Unfortunately one of the longest is the final union of all objects. So
cancelling can be a problem.
I tend to cancel the process. As OpenSCAD auto-saves you can get any edits
back if needed.
F5 will use a lot of cpu if you use render(), minkowski(), resize() and I
think offset() as these use CGAL. There is no cancel function for F5.
You say "viewing after F5", if that means F5 is finished, but viewing such
as moving the object, is slow, then you need a new PC, or break-up your
model as it is usually a very complex model causing this.
Admin - PM me if you need anything, or if I've done something stupid...
Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.
The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out!
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17397.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
to pause: killall -STOP openscad
to resume: killall -CONT openscad
On Sat, May 21, 2016 at 7:12 PM, MichaelAtOz oz.at.michael@gmail.com wrote:
Johan Jonker wrote
Problem is that the rendering sometimes takes quite long and cannot be
paused, I think. Or is there a trick to do that?
Also the viewing after F5 takes a lot of CPU capacity.
Is it possible to stop the viewing process?
For F6 render, there is a small close icon (X in a circle) at the end of the
progress bar after the n/1000, however, it is only tested between CGAL
calls, if CGAL is in a lengthy operation it can take a long time.
Unfortunately one of the longest is the final union of all objects. So
cancelling can be a problem.
I tend to cancel the process. As OpenSCAD auto-saves you can get any edits
back if needed.
F5 will use a lot of cpu if you use render(), minkowski(), resize() and I
think offset() as these use CGAL. There is no cancel function for F5.
You say "viewing after F5", if that means F5 is finished, but viewing such
as moving the object, is slow, then you need a new PC, or break-up your
model as it is usually a very complex model causing this.
Admin - PM me if you need anything, or if I've done something stupid...
Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.
The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out!
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17397.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
--
Sergey
Hello everyone, thanks for reacting.
I was really considering to buy a new laptop. But min is only 2 years old.
So I did first some cleaning (dust removal from the ventilation opening).
It seems to help. The laptop sound less noisy when calculating.
I also be more patient. Not watching yuotube moving while waiting to render.
I saw that that the temperature is going up when I do that.
I had not noticed the subtile x in the right corner: thanks for that.
I will try the kill operation.
--
View this message in context: http://forum.openscad.org/CPU-is-getting-hot-can-I-pause-rendering-proces-tp17384p17402.html
Sent from the OpenSCAD mailing list archive at Nabble.com.