Quote Originally Posted by JohnHaine View Post
The only difference in labelling really is that they bring out both sides of the opto-isolated inputs, you just ground the side labelled "-" on each.
Could I bother you with one more question on this. Looking at the wiring diagram for the CNC4YOU driver you linked, the driver connects to a controller with four terminals: VCC, SIGNAL, DIR SIGNAL, ENABLE SIGNAL.

Click image for larger version. 

Name:	Screenshot 2023-05-13 at 22.40.22.png 
Views:	216 
Size:	817.8 KB 
ID:	31881

As mentioned, mine are labeled differently (STEP, DIR, EN, GND). I'm concerned by the difference between the diagram's VCC to my controller's GND. You mentioned "you just ground the side labelled "-" on each" but the diagram shows the -'s connected to the controller's SIGNAL, DIR and ENABLE terminals, and the +'s connected to the VCC terminal. Should I be worried that connecting the driver to my controller's GND terminal would not to the same thing as connecting it to a VCC terminal as shown in the diagram?

Sorry to drag this out, I really appreciate your help.