Smaller X-Axis motor and some othe issues

Discussion in 'Build Help' started by NinjaLars, Aug 21, 2016.

  1. NinjaLars

    NinjaLars Active Member

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    Ok, my BB Dual Hybrid is almost ready!
    I´m at the stage to the first Auto homing, which wasn´t very successful....

    The X carriage went right (at a pretty high speed) instead of left and I had to turn of the power to stop it. How do I change that?
    Also, I´m using a smaller Nema motor on the X Axis as it is lighter. I guess I need to to some changers for that as well, any idea about that?

    // Lars
     
  2. Mark Curry

    Mark Curry Well-Known Member

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    Try switch the plug around on the header on the Rhumba for X-Axis... (rotate it 180 degrees)
     
  3. NinjaLars

    NinjaLars Active Member

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    Thanks! I´ll try that later today!

    What about using the smaller Stepper motor on the X-Axis? It is easily swapped to the one I supposed to be using but it would be neat to try out the lighter one.
    What needs to be changed? Any ideas?
     
  4. Mark Curry

    Mark Curry Well-Known Member

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    Should be doable, but no experience... Perhaps someone else can chip in...
     
  5. tohara

    tohara Well-Known Member

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    You need to verify if it is 0.9 or 1.8 deg step. That is sometimes stated on the label. The original is 0.9 deg.

    And you need to adjust the stepper driver current to fit the new motor.
     
  6. NinjaLars

    NinjaLars Active Member

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    It is a 1.8 deg stepper, one of the smaller ones supplied with the Titan.
    I understand that I need to adjust the stepper driver but I don't know to which value or where to do it...
     
  7. JonGillam

    JonGillam Active Member

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    You'll adjust the voltage of the driver the same way you did the others during the build guide step. I would say the same range should be acceptable. Might start on the low side (.5 or so)

    Then you'll need to adjust your steps/mm in the firmware either from the LCD or directly in Marlin (saves a lot of little encoder wheel spinning) :)
     
  8. NinjaLars

    NinjaLars Active Member

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    Any idea to what value?
     
  9. tohara

    tohara Well-Known Member

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    You need to set your X-step/mm to 80.
     
  10. NinjaLars

    NinjaLars Active Member

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    Thanks for your help! The carriage goes the right way and the values are changed.
     
  11. moshen

    moshen Well-Known Member

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    Stian Indal Haugseth likes this.

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