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New Nema 23 High Torque

Discussion in 'Motors' started by Sully3535, Sep 27, 2020.

  1. Sully3535

    Sully3535 New
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    I rebuilt my machine and switchet to Nema 23 High Torque from Nema 23's. x and y1 show red light on blackbox. Both Y motors were working after a little tweaking. Is my blackbox shot? When I first started the motors I had to adjust the steps way down but when I calibrate the distance moved it wanted to adjust my steps back up which made the motors not work. What can I do to rsolve these issues?
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Adjust current down a little and check for shorts. The red indicator is explained here:
    docs:blackbox:currentadjustment [OpenBuilds Documentation]
     
  3. Sully3535

    Sully3535 New
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    Thanks Peter. I will try and adjust and let you know how it turns out.
     
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Remember to turn it off for a couple mins to clear the Fault too
     
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  5. Sully3535

    Sully3535 New
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    Ok. I got the motors running smoothly. However. both x and y only travel about 35 mm before stopping. Then I can start again. What causes this?
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Explain what you are trying to do, when it does that?
    Jogging Incremental or Continuous, etc. Any errors
     
  7. Sully3535

    Sully3535 New
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    Continuous jogging. No errors. After it stops I release the mouse button and click it again and it starts again.
     
  8. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Try in Incremental
    Check Grbl settings again (max travel, soft limits etc) as Continuous calculates maximum move off those values) (at least CONTROL does, what are you using?)
     
  9. Sully3535

    Sully3535 New
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    I am using Open Builds Control
     
  10. Sully3535

    Sully3535 New
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    My max travel is fine. However, the Openbuilds Control shows a movement of !000 mm when it has only moved 575 mm. How do I adjust that. Keep in mind that when I calibrate the movement it changes my steps per mm and it stalls the motors. My steps need to be at 185.
     
  11. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Continuous is a convenient rough positioning action when checking actual distances

    Steps per mm has to be correct to get reality to reflect the software side of things. Fix that. Then address the stalling by lowering acceleration, or upping stepper driver current.
     
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  12. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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  13. Sully3535

    Sully3535 New
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    Thanks Peter. I have the x and y calibrated. My steps per mm are 315-317. My acceleration I had to put all the way down to 5. Is that normal?
     
  14. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    What kind of machine, where is the motors from etc? Our motors are low inductance, low coil voltage motors for fast acceleration
     
  15. Sully3535

    Sully3535 New
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    Custom Built machine. The nema 23 High Torque are from Openbuilds. It's a 1200x2400 with 22mm lead screws on the y and 16mm lead screw on x.
     
  16. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Our leadscrews are 8mm pitch. If your pitch is different, that would explain different acceleration requirements
    22mm is quite overkill as well, that is a very heavy piece of metal to spin up.
     
  17. Sully3535

    Sully3535 New
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    22 mm was the only one I could find with the length I needed.
     
  18. Sully3535

    Sully3535 New
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    It's actually 20mm
     
  19. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    All good, but i think its weight goes a long way toward limiting not only acceleration, but probably also maximum feedrate
     
  20. Sully3535

    Sully3535 New
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    Got everything working ok. However, Y and y2 lose sync. y loses 3mm in every 300. How can I adjust that?
     
  21. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Start looking for a mechanical cause first (slipping coupler, loose setscrews, etc)
     
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