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Let me clarify this "jitter" on the 4th axis:

1) the motor is in idle state
2) but the motor has a very slight movement/rotation left and right around the center/stopped position.

Again, it's...

Thank you chronomill!

I'll probably leave it alone then.

Other quirk is that the 4-axis motor has jitter at idle, but only sometimes. Turn it some and it's steady. Turn is some more and it...

I also have this TX14207 stepper driver in my 6040 cnc router. The A-axis motor is getting hot just sitting idle so I wanted to try turning down the current but don't know the DIP switches.
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