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Using the machine frame as a ground.

Discussion in 'General Electronics' started by Crchisholm, Mar 8, 2018.

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  1. Crchisholm

    Crchisholm Well-Known
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    is there a reason I can not or should not use the machine frame as a ground for my end stops as long as i ground the GRBL to the frame?
     
  2. David the swarfer

    David the swarfer OpenBuilds Team
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    you should not, because it creates ground loops.
    for best electrical noise resistance you must use a star ground.
    there is one ground point, and everything is grounded to it.
    this includes the frame, which means the frame cannot be used as a conductor.

    Why star ground????
     
  3. Crchisholm

    Crchisholm Well-Known
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    Good information. If I understand correctly, it would be a roll of the dice on whether I had problems related to this or not. Since, I have enough bad rolls without adding more, I will stick to the ground coming back to the Grbl.

    Thank you for educating me a bit more,
     

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