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Mach Discussion => General Mach Discussion => Topic started by: kolias on September 05, 2022, 06:14:26 AM

Title: Grounding Stepper Motor Driver
Post by: kolias on September 05, 2022, 06:14:26 AM

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

Title: Re: Grounding Stepper Motor Driver
Post by: Charlie_M on September 06, 2022, 05:41:58 AM

 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.

Title: Re: Grounding Stepper Motor Driver
Post by: Charlie_M on September 06, 2022, 05:47:10 AM

 I meant ground one end of the signal shielding.

Title: Re: Grounding Stepper Motor Driver
Post by: kolias on September 06, 2022, 08:58:57 AM

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

Title: Re: Grounding Stepper Motor Driver
Post by: kolias on September 12, 2022, 12:03:22 PM

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.

Title: Re: Grounding Stepper Motor Driver
Post by: Charlie_M on September 12, 2022, 12:59:51 PM

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

Title: Re: Grounding Stepper Motor Driver
Post by: kolias on September 12, 2022, 01:35:16 PM

Quote from: Charlie_M on September 12, 2022, 12:59:51 PM

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

Yes, grounding the shielded cable shielding