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?
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????
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,
