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Low Speed Rough, High Speed Smooth

Discussion in 'Motors' started by Jonathon Duerig, Mar 21, 2017.

  1. Jonathon Duerig

    Builder

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    In my latest build, I'm driving some of the OpenBuilds high-torque NEMA 23 steppers with a 12v supply and an xProV2 board. I've noticed that they seem to run really smooth at high speeds (5000 mm/min) but very rough on low speeds (250 mm/min). On low speeds, there is audible vibration.

    Is this normal? Or is there some setting I ought to change? I could change the microstepping setting, increase the voltage of the power supply, or maybe even change the controller board. Any suggestions?

    -D
     
  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

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  3. Marti07

    Marti07 New
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    Hi Jonathon,

    Reading the discussion indicated by Rick 2.0 I have found pots about how to configure the maximum speed and acceleration, but not about the problem at low speeds.
    Have you solved the problem?

    Now I have this problem and I don't know if it's normal or not.
    If you need more information, tell me! ;)

    Thanks in advanced!
     
  4. Jonathon Duerig

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    I think it is normal for steppers, especially at low voltages. I eventually 'fixed' this problem by upgrading to dedicated power controllers and running my steppers at 48v. But this continues to be the case on my machines that I drive at 12 volts.
     

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