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General Mach Discussion / Re: Mach 3 producing very strange unpredictable output
« on: January 22, 2017, 10:32:11 PM »
Pictures would help, as I've never heard of anything like what you're describing, and can't really picture it.
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I don't understand why the probe works if I hold the plate in my hand and touch the bit, but not if I put the plate down and let the bit touch the probe plate.
Here is something I've noticed when the probe light is on, pin 1 on the BOB comes on to a relay for the 12v to the spindle cooling pump. Also sometimes the Z stepper will move one or two steps.