Replacement of feeder stepper motor, UM2

[champ1981 0]

Can anyone confirm the correct feeder stepper motor for the UM2. I have a failed stepper motor, so i removed the original which had the following part number on it

SY42STH47-1684AW

I was unable to get this part number, but found the following part number from a company called Zapp

SY42STH47-1684A

I got one of these and replaced the old one.

The motor now works, but runs very fast, I would guess at twice the speed.

Does anybody know whats happened, have a replaced with an incorrect part? Why would the motor runs so fast.

Any advice appreciated.

[neotko 1,403]

Your new motor is 200 steps/rev, the um2 feeder motor is 400/ step/revolution

You would need to change the esteps to half your current amount

Google on this forum (search uses google) change estep um2

https://ultimaker.com/en/community/21533-where-to-edit-firmware-esteps-for-um2#reply-149473

Mind that in that post the estep number isn't the one you need, I don't have the um2 esteps at hand, but I think you get the idea?

Edited January 30, 2017 by Guest