[charlieslasher]

My motors sometimes stall when they are hot/have been running for a while. I am still not sure if its software or motors but has anyone experenced this. they are also running close to there stall rpm.

I dont have current set resistors on the motors as i didnt think i needed them but maybe this will help keep the motor cooler when the motors sit idol?

Any other options for cooling would a fan on the back end help.

381oz steepers with gecko540 and 40V PSU

[Martin 007]

My motors have never stalled ... yet .... but they do get hot and it has been on my mind ever since. They are factory installed so I ave no clue as to how or what they have to deal with the issue. I do plan on installing cooling fans for the simple fact that heat kills. I purchased a set of 3 cooling fans for a computer... never installed them and now think I will use the outlet air (filtered) from the chip collection blower. Anyway I'm interested in the answers you get here.

[johnmac]

You need to install the resistors. That will reduce the holding current, lowering the temperature of the steppers. The Geckos should have a resistor even if they are running at maximum current.

John

[Crevice Reamer]

Yep!

Get THESE resistors:

MFR-25FBF-3K48 Yageo | 3.48KXBK-ND | DigiKey

CR.

[ger21]

You may actually need a fan on the G540, if it's getting hot.

[charlieslasher]

Right i get the resistors. It hasn't done it for a while, i removed some USB extension device that might have been causing the problem.