UM2 Stepper wiring pinout

[Octocom 1]

Hi all,

 

I'm trying to wire up a replacement nema 17 motor, where voltage amps etc are fine.  its just the wire config is different.

 

I have checked the control board schematics, but can't figure out which is -a -b see below

 

1=1b

2=1a

3=2a

4=2b

 

Can anyone tell me which is which please?  im trying to rewire an e3d with the following motor config

 

1=A

3=B

4=-A

6=-B

 

Luke

[Octocom 1]

nevermind figured it out, only need to swap two wires round motor side pins 3 and 4

[gr5 2,172]

If you wire it wrong you won't hurt the stepper or the driver so it's fine to just experiment.