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Solved Steppers only move in one direction

Discussion in 'Troubleshooting' started by PickyBiker, Mar 17, 2015.

  1. PickyBiker

    PickyBiker Active Member

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    My Robo 3D printer has developed a stepper problem. All 3 axis will only step in one direction. It started out as a problem with the steppers stalling in the Z+ direction and got worse until none of them will step in both directions. The power supply put out a nice 12.1 V with or without stepping.

    I figure it's the ramps or the arduino mega?

    Thoughts?
     
    #1 PickyBiker, Mar 17, 2015
    Last edited: Mar 17, 2015
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Likely the RAMPS or the Pololu stepper driver cards, but it would be odd for all of them to fail.
    Given the symptoms I would lean towards the RAMPS.
     
    #2 mark tomlinson, Mar 17, 2015
  3. Mike Kelly

    Mike Kelly Volunteer

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    Is this manual controls or during a print?
     
    #3 Mike Kelly, Mar 17, 2015
  4. Stephen Capistron

    Stephen Capistron Active Member

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    does everything move nice and easy when the printer is off?
     
    #4 Stephen Capistron, Mar 18, 2015
  5. Ziggy

    Ziggy Moderator
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    Steppers only moving in one direction can be caused by endstops open circuit or not connected.
     
    #5 Ziggy, Mar 18, 2015
    Ben R likes this.
  6. Ben R

    Ben R Active Member

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    what he said.
     
    #6 Ben R, Mar 18, 2015
  7. PickyBiker

    PickyBiker Active Member

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    Bingo... One of the z-axis switches was too low on the nut and it was not switching.

    Nice job guys!
     
    #7 PickyBiker, Mar 18, 2015

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