Stepper Motor Temperature Range...
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I tried searching on this --- couldn't come up with a useful search --- since so many other unrelated topics discuss temperature of things other than the Stepper Motors here :).
So... what is an acceptable range for the temperature of a Stepper motor? 3 of the 5 on my printer seem to be around 40C to 45C (ie: I can touch them, but they're hot), but I believe two of them are running around 60C (ie: I can briefly touch them, but it's beyond uncomfortable).
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@zbeeble Check the data sheet for the motors you are using - that's the only way to answer your question. Usually it's quoted as around 80 Deg C.
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Fetched my fluke IR meter ... I was really bang-on with my temp estimate.
I wonder, tho. 2 things...
- Can we cause the mA sent to the motors to be scaled with the required speed of movement? Z doesn't move all that much.
- Can we cause the bed levelling to "stop" or "scale back" after a number of layers? Certainly, I find the bed levelling useful for a really good part to bed adhesion, but by the 20th or 30th layer, it seems like it's just become a bunch of busy work.
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- Turn the current down
- Bed taper compensation M376 https://docs.duet3d.com/User_manual/Reference/Gcodes#m376-set-bed-compensation-taper
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@zbeeble said in Stepper Motor Temperature Range...:
Can we cause the mA sent to the motors to be scaled with the required speed of movement? Z doesn't move all that much.
All Duet 3 boards support standstill current reduction, which reduces motor current when the motor is not moving. Use the M917 command to configure it.
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@zbeeble One other thing. If you can, use aluminium motor mounts bolted to the frame. You'll find (as I did) that the alumium conducts the heat away from motor - the mount and frame act as a giant heat sink. My 2.3A NEMA 23s and 1.8A NEMA 17s barely get much above ambient even after several hours of throwing 3Kgs of mass around at high speed.
