Hi everybody
I'm new here but I want to help and off course be helped.
About your grounding set up:
Yes, common practice to connect earth wire (yellow/green) to the chassis of the machine.
Yes common practice to connect all earth wires to the same grounding point ( from motors or power supplies running from the mains)
Not common is connecting the negative wire to ground, it doesn't hurt but I never seen this done unless you put a small value resistor ( +/- 10 Ohms 5 or 10W ) to "lift" the ground.
Another thing is if you are using shielded cable for the steppers or limit/home switches connect only one side of the shied to ground.
Ok now for me
I'm testing a few things now that I started building my CNC mill and I run in some problems...
Yesterday I finally managed to get the motor to run (not perfect but ok for testing).
My problem now is/are the E-stop and limit switches, I tried everything and noting, no limits or E-stop.
I tried HI/LOW settings and different pins and nothing.
I know for a fact that the breakout board is working and putting out the correct voltage, the E-stop is connected to pin 15.
Any ideas ?
Ric