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Solved no movement on any axis

Discussion in 'Troubleshooting' started by jig, Sep 19, 2016.

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  1. jig

    jig Member

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    hi i changed my arduino and ramps board ,i have a robo beta , i did putt all the wires in the right places but i have no movement on any axis ,the bed and extruder are working fine the come upp to the correct temp , so anyyone has an idea wat i shuold do?
    thanks
     
    #1 jig, Sep 19, 2016
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Are the Stepper driver cards in correctly? These are the little cards that are on the RAMPS.
     
    #2 mark tomlinson, Sep 19, 2016
  3. jig

    jig Member

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    yes i did putt them in correctly should i try again? and change them to be sure?
     
    #3 jig, Sep 19, 2016
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I would start with just one and make sure that axis works.
    Do you have the jumper below the stepper drivers installed correctly?

    Ramps Jumpers.jpg
     
    #4 mark tomlinson, Sep 19, 2016
  5. jig

    jig Member

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    yes i did putt everything in like that
     
    #5 jig, Sep 19, 2016
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #6 mark tomlinson, Sep 19, 2016
  7. jig

    jig Member

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    wow that is a bit difficult for me i m not in to that much electric pfff is there a other way ,, ? im going out for 2 hours then i will be back thanks for the help so far i will reply wen back
    Edwin
     
    #7 jig, Sep 19, 2016
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Video here if that helps:

    https://www.pololu.com/blog/484/vid...limit-on-pololu-stepper-motor-driver-carriers

    There is another less precise way...

    The stepper drivers can be adjusted without measuring voltages, by observing motor performance. Use a nonmetal screwdriver (plastic or ceramic) to avoid short circuits. Either run a print (preferably one that's been causing motor issues) or set up manual control using an LCD Controller, or Repetier Host, or Pronterface. CAREFULLY turn the pot fully CW (minimum current) then back CCW about 1/4 turn, or enough to make the motor run smoothly. From that point, if you are able to adjust while the motor is moving (either in a print or under manual control) turn the trimpot CW until the motor starts to stall or stutter, then turn CCW until steady performance resumes. Otherwise, alternate adjusting the pot slightly and then running the motor, with the same results in mind. The general idea is to find a low current setting that results in stalling or stuttering, and then boost the current a bit to get reliable motion without going too far CCW.
     
    #8 mark tomlinson, Sep 19, 2016
  9. daniel871

    daniel871 Well-Known Member

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    Did they change the stepper drivers so that there were actual limits on the pots? All of the stepper drivers I ever got from Robo (from factory and in warranty parts) were essentially free spinning and you had to use a meter to know when you ran the pot out of it's effective range.
     
    #9 daniel871, Sep 19, 2016
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  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Depends on the stepper driver (or shall we say "YMMV")
    Some have them, many do not. This is another excellent reason to use the reference voltage approach.
     
    #10 mark tomlinson, Sep 19, 2016
  11. jig

    jig Member

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    hi im back but what i dont gett is this i changed my ramps and arduino i used the 'old stepperdrivers"from before the stepper drivers did not have an isssue, is that normal then wen i putt in new boards?
     
    #11 jig, Sep 19, 2016
  12. jig

    jig Member

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    maybe beter safe to change the stepper drivers too? and are these good?
    Stepstick DRV8825 driver
     
    #12 jig, Sep 19, 2016
  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #13 mark tomlinson, Sep 19, 2016
  14. jig

    jig Member

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    Package included:
    5 PCS 3D Printer A4988 Stepper Motor Driver Reprap + 5 PCS Self-adhensive Heatsink

    so these are ok?
    i think with the problems with my old arduino ( IT OVERHEATED ) i think then to be safe to change the stepperdrivers aswell
    let me now what you think
     
    #14 jig, Sep 19, 2016
  15. jig

    jig Member

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    oo i should not forget when my arduino overheated the ramps blew up as well ,i didnot replace the stepper drivers only the boards maybe that is it, don't you think?
     
    #15 jig, Sep 19, 2016
  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Certainly possible
     
    #16 mark tomlinson, Sep 19, 2016
  17. jig

    jig Member

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    ok thanks ill order new ones and be back again ,you can closed the treat for now thanks for the help !
     
    #17 jig, Sep 19, 2016
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