Uccnc hdbb2 wiring help needed

[the great waldo]

EM drives have differential inputs, but canbe connected as single ended in NPN or PNP type setups.

What you want is to connect the drive -'s to gnd, and then the step/dir to the drive +'s.
And yes, you could connect the drive -'s together at the drive.

Hi m_c

I hope i'm not being a pain. Would it be ok to connect the (hdbb2 rj45 pin 3 LPT port ground) to the dir - then a link from there to pulse - ? assuming that the ground would come from the bob. Or would I have to run a connection from the pulse - to the gnd. point on the stepper driver ?
Thanks in advance.

Andrew