Enclosed printer water cooled motors
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@Veti
That's the insulation class temperature. Without knowing the magnetic materials inside the motor it's hard to tell what's the curie point where the motors completely demagnetize. Most magnets also start losing power above 80C so it's best to keep their temperarures as low as possible. -
What specific kind of failure does applying a heatsink or water jacket prevent?
Does a heatsink or water jacket cool the rotor where the magnets are located and separated from the stators by an air gap?
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They prevent the loss of magnetism that happens in ferromagnets when temperature rises above their max working temperature point, until it reaches its curie temperature and completely demagnetizes.
Most motor magnets have the working temperature limit somewhere in the 80-160 range. Its never really stated properly and I wouldn't trust Chinese motors to use the proper materials.
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@deckingman said in Enclosed printer water cooled motors:
That's me - I don't "do" any social media, including Facbook or even Facebook
.The spelling was intentional....
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@Veti I've looked at the dyze cooling blocks but they only cover a small surface area of the motor. I saw this https://www.researchgate.net/figure/a-Stepper-motor-cooling-shroud-installed-on-a-NEMA-17-stepper-motor-b-Computational_fig7_311666362 and i thought instead of running air through that heat shroud, run water and cool it further with a peltier. I think it looks promising as a better method of keeping the motors evenly cool.
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@Rushmere3D I've seen that video of his when i was searching for watercooling. His method of cooling is similar to dyze he really did a great job.
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@1997alex said in Enclosed printer water cooled motors:
@Veti I've looked at the dyze cooling blocks but they only cover a small surface area of the motor.
Cincinnati uses them in their SAAM HT and they seem to work fine.
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@Veti I ended getting 0.9 degree moons stepper motors and i'm hoping they can withstand the heat. A member on prusa forum did multiple test with moons motors and LDO motors and the moons out performed the LDO motors.
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@1997alex said in Enclosed printer water cooled motors:
@Rushmere3D I've seen that video of his when i was searching for watercooling. His method of cooling is similar to dyze he really did a great job.
I think his advise is dangerous and irresponsible but maybe that's just me .......
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@jens55 hahaha, i suppose.
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@1997alex said in Enclosed printer water cooled motors:
I ended getting 0.9 degree moons stepper motors and i'm hoping they can withstand the heat. A member on prusa forum did multiple test with moons motors and LDO motors and the moons out performed the LDO motors.
yes i have read that article. heated chamber was not one criteria there though
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Does the rotor generate its own heat or does it get all its heat from the stators?
Does applying a heatsink or water jacket to the motor's stators cool the rotor which is separated from the stators by an air gap? -
@mrehorstdmd
Yes.
Resistive losses will convert some of the magnetic flux into heat.But generally things like the insulation and the lubricant in the bearings are the limiting factors (the solder if there is any now I think about it).
Most steppers are soft iron for both rotor and stators, iirc, which has a curie temp waaaaay above anything you are going to see.Water cooling is going to protect at least 1 of the bearings and probably the wiring. Its not the most efficient way of doing things, but it works.
The next issue, if you are trying to get really hot is belt life. Gates only rate them to 80c iirc.
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@theruttmeister Gates offers high temperature belts rated to 135C
https://www.filastruder.com/products/gates-2gt-belts-high-temperature-epdm
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No need for a peltier to cool the hotend and steppers, A single rad with 120mm fan will exceed all needed cooling capabilities.
When I am done with my project, 5 steppers and 4 hotends will be cooled by a single cooling loop, (aiming for 80° chamber temps).
I use these on the steppers and do their job. -
@JamesM said in Enclosed printer water cooled motors:
@theruttmeister Gates offers high temperature belts rated to 135C
https://www.filastruder.com/products/gates-2gt-belts-high-temperature-epdm
And going to 150c (for PEEK) means you need to look at silicone belts
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@theruttmeister said in Enclosed printer water cooled motors:
And going to 150c (for PEEK) means you need to look at silicone belts
might was well go for a ball screw based system then.
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I am simply adding a water cooling loop and blocks at the motors.
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@Veti said in Enclosed printer water cooled motors:
@theruttmeister said in Enclosed printer water cooled motors:
And going to 150c (for PEEK) means you need to look at silicone belts
might was well go for a ball screw based system then.
how would you run ball screws on a Core-XY ?
And as i already said i am going for the simplest method of all, placing the motors outside the chamber (no active cooling required) and using high temp belts, i wont be printing peek
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@CaLviNx said in Enclosed printer water cooled motors:
how would you run ball screws on a Core-XY ?
you cant, it would be a Cartesian printer.
see this as an example
https://www.thingiverse.com/thing:2929869
