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    1. ROBOT FORUM
    2. Questions
    3. Has anyone had trouble with the play in the J4 motor.
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    Dennis Terrell
    Oct 31, 2019

    Has anyone had trouble with the play in the J4 motor.

    Has anyone had trouble with the play in the J4 motor. There is about a 3 to 4 degree slop in that axis that is in the motor. I can turn the axis by hand and the motor spins about 3 to 4 degrees. The gear and belt are good but motor itself rotates. Any suggestions?

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    Chris Annin
    Oct 31, 2019

    I have never seen that much backlash in the Nema 11 gearbox for J4. When you say gear and belt are good I assume you mean the sprocket is not slipping on the gearbox shaft and set screw is tight?

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    Dennis Terrell
    Nov 6, 2019

    I have ordered a new stepper because it seems like there might be a bad winding. Moving J4 in 1 degree increments has problems. Sometimes the stepper moves and sometimes it doesn't. Will let you know if that cures the problem.

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