Ider, Selector and Pully Motors are becoming VERY hot while not doing anything.
I just finished building my MMU2S and upgrading my MK3s to a MK3s+
I've found that the Ider, Selector and Pully Motors are becoming VERY hot while not doing anything. ie when the printer is booted up and on, but not actively printing or heating the nozzile or print bed. The X Y Z and E motors are perfectly cool in this state. However the MMU2S motors are all heating up.
Is this normal? Have other people noticed this?
Its possible that I've made some kind of wiring error. Or possibley there is a defect on the MMU2 board? The MMU2 took the new firm ware fine, and the system seems to work. The MMU2 motors home and I'm able to load filitments (sometimes).
Any help apprenticed!
RE: Ider, Selector and Pully Motors are becoming VERY hot while not doing anything.
Most of the time the steppermotors on the MMU are powered to lock them in place. But they shouldn't be VERY hot.
I just checked on mine and they are warm. Just as the left and right z-motors during printing.
RE: Ider, Selector and Pully Motors are becoming VERY hot while not doing anything.
On further testing it mainly seems to now be the idler motor getting hot, during actual printing. I think you are right its the MMU keeping them powered and locked in place.
I noticed the problem just after building the MMU2S and it was a hot summers day. So I think ambient temperature is playing a role.
At that stage I was doing a lot of fiddling around with the Buffer and other parts of the set up, with the printer powered but not doing anything.
If there was a larger problem at play, ie, a faulty board or a incorrect wiring I would have had other problems since then.
I feel that the MMU2 firm ware could probably be tweaked to not need to lock the motors (I,S, P) in place indefinitely when the printer has just been powered but is inactive. As the heat build-up is concerning. And not necessary on the other 4 printer motors. (xyze). Though locking motor (I) during printing is most likely necessary.
@Balklin thanks for testing 🙂