nema 17 heat problem

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Joined: Fri Jun 12, 2015 12:48 pm

nema 17 heat problem

Post by op117 » Sat Jun 13, 2015 2:24 am

whats the best way to cool down the nema 17 motors?
The ambient temp is around 90F and i have thermal shut at every job, also cooling the air is not a potion for my shop at the moment...

whats the best heat sinks, fans , and config of eater... would be awesome to put a radiator like a h100 with custom blocks on the motors :o :lol:

but whats the most cost effected cooling for this :?:

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Re: nema 17 heat problem

Post by WillAdams » Sat Jun 13, 2015 3:25 am

Are you certain it’s the motors shutting down and not the stepper drivers?

- active cooling --- get a fan
- adjust the current, turn it down as much as makes sense ... he_Current
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

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nema 17 heat problem

Post by Jimf » Sat Jun 13, 2015 3:52 am

I use small 12volt fans attached to heat sinks. The ones you see used on graphics card.s. They will lower the temperature approximately 20 degrees.

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Re: nema 17 heat problem

Post by clockit » Sat Jun 13, 2015 5:28 am

I'm with Will here, I've cut jobs that lasted over 2 hours and never once have my 17's shut down...
Shapeoko 2, Full Kit #7071, Makita RT0701C Router, 1000 x 1000 upgrade, Acme Z Axis w/Nema 17 Belt Drive

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Re: nema 17 heat problem

Post by op117 » Sat Jun 13, 2015 6:06 am

im thinking of getting

4x ... W35WSKZ6W8

cutting to size for motor driver board and the motos thim selfs and

2x ... +40mm+fans


also i have all ready adjusted the pots on the driver board, but still gettting a shut down....

this is just for fun i made a inventer file for a nema 17 water block: :lol:

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Re: nema 17 heat problem

Post by cvoinescu » Mon Jun 15, 2015 6:58 pm

The motors themselves do not have any sort of temperature sensing or overheating cut-out. They can go fairly hot (hotter than you can keep a finger on for more than a second) before they're in danger. If they cut out, it's the drivers that overheat, and cooling the motors will not make a difference. You can reduce the current a little to reduce the motor and driver temperature, but it also reduces torque. What you need is better cooling of your drivers (gShield or whatever you're using). Try to get airflow both over and under the board (e.g. with a fan placed to one side).
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