I'm going through an old project cleaning up things I did wrong the first time and have a question about shielded cable.
I have a 5 conductor shielded cable that I have 4 conductors used for A/B motor connections from the motor to the driver and the 5th conductor grounding the motor frame back to the high power supply.
My question pertains to the shield drain on the cable, I have read it should connect back to the controller(Arduino Due) ground. I have also read it should connect to the driver ground and was hoping someone could give me a correct answer.
Thanks for any help.
The cable shield can only be a shield when it has ONE connection at an end and that end has the lowest impedance. So, the end at the Arduino should be the only ground connection.
If connected at both ends, the shield has become a conductor of ALL noise currents between the two ends and will induce that noise into the other conductors.
Paul
Thanks Paul,
I don't have it connected at both ends, I was just wanting to terminate it in the right place on one end, either the controller or the power supply and I was going to terminate at the Arduino and then I saw a post about connecting it at the stepper driver which didn't seem right so I thought I would ask.
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