On a stepper motor driver we have the high voltage section where we connect the required power and we also have the signal section where the wiring from the stepper motors connect.

I use shielded cables for both the high voltage and signal sections and my question is do I ground the shielded cable in both sections or just the high voltage or signal section?

Thanks

 I would ground the signal wiring, but only one end of the shield not both. the high voltage side does not need to be shielded in my opinion.

 I meant ground one end of the signal shielding.

Thank you Charlie, I will ground one end of the signal shielding

To my experience grounding the signal side of a driver (A in the attached picture) is wrong, that’s the cable connected to the BOB. It almost twisted my gantry because the Y axis motor turned much faster than the slaved A axis.

Then I grounded the high voltage (D), that’s the cable handling the feed to each stepper motor and then all was good.

We're talking about grounding the shielded cable shielding. Not any signals.

We're talking about grounding the shielded cable shielding. Not any signals.

Yes, grounding the shielded cable shielding