Hello all,
I just have a question about the stepper motors on my XXL. I know than when the power is off the pulleys can move freely and when the power is on the are locked. On mine, the left side y axis motor is able to move. Is that normal or does the motor need to be replaced?
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Most likely the problem is that the pulley is not secure on the shaft — check the pulley set screws and put a “witness mark” on the pulley/shaft ends.
If that’s not it, it could be an electrical issue w/ a connector or a wiring extension — and it might be that that has damaged the stepper driver.
If nothing is obviously wrong mechanically, power down, swap the two Y-axis motor connectors (if you have an SO3) and then power up — does the problem swap sides? Power down and swap back.
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That was it! A lose set screw on the pully.
Thank you!
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