Reply To: Strange grinding/jittering problem

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John
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If I move the gantry on mine with the power off, it does indeed generate voltage enough to power some of the LEDs I have in the circuit…

I don’t quite understand what you were doing when it gave the noise, so I can’t coment on that… I assume you’ve done the usual first checks to make sure the right jumpers are set and polarity is correct on the steppers?