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Stepper motors, lumpy bumpy notchy??

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    Stepper motors, lumpy bumpy notchy??

    Is this normal when moving by hand, i feel two notches/bumps/lumps mid way and two at each end. To start of with o thought it might be a defect on the rail where the bearing runs on, but the gap apart makes me think it's mechanical, possible where the poles line up?? Regards

    #2
    Would help if you specify what printer you are using. Also which stepper motor(s) are you referring?

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      #3
      Sorry yes, a alfawise u30
      longer 42BYGH40H-2-19D
      KH 2018 12 20

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        #4
        Anyone? Seems to be printing fine.

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          #5
          All steppers have magnetic "bumps" when they are turned by hand. You can even rectify the output to use them as dc generators.

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            #6
            Brilliant, thank you

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