[BobF]

If run in the same cable I would expect there to be a lot of noise picked up on the status lines from the heavy current switching on the motor lines. My CNCs not running yet but similar circuits at work gave us all sorts of problems. You might dampen this by slugging the sense lines with a low resistor and capacitor if your circuit allows such.

I was afraid that might be the case. I will run a separate sheath for the switches. Since this is a shielded cable, do you attach the shield to anything?
I don't think the HobbyCNC controller has a "ground" although there is a common for the motor drives.