Axis skipping

Discussion in 'Guides, Mods, and Upgrades' started by Michael Frampton, Sep 12, 2016.

  1. Michael Frampton

    Michael Frampton Well-Known Member

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    Anyone got a definitive answer for excessive x and y movements yet ?
     
  2. Tim

    Tim Member

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    This randomly started happening to me - my solution was to put a much bigger (80mm) fan, directly over RAMPs board. The problem seemed to be the stepper drivers overheating, and that fixed it for me.
     
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  3. eca

    eca Well-Known Member

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    There can be multiple reasons, the drivers as said above, grub screws on the motor pulleys being loose. I think I had mine skip due to the Y-axis rod sliding back and forth and the grub screw hitting against one of the screws on the bearing mount. I tightened everything up and put the heat sinks on my drivers, so far so good.
     
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  4. Michael Frampton

    Michael Frampton Well-Known Member

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    Maybe il go for heatsinks then.but may be changing to drv8825s..not sure of the benefits. ..any ideas? ? Thx
     
  5. Michael Frampton

    Michael Frampton Well-Known Member

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    x and y stepper pulleys have had loctite 648 dripped into the flat on shaft and in threads.basically permanently bonded. Could not remove them if i wanted to !
     
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  6. Old_Tafr

    Old_Tafr Well-Known Member

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    Gin?
     
  7. Stefan

    Stefan Well-Known Member

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    I have a drv8825 with a head sink on Y and it skipps too. when printing around 70 mm/s , ok I have the cover open but a 92mm 12v fan is blowing from the right side over and a little under the Rumba.

    It's an old fan and not the strongest (crappy one :)

    But I'm not sure about the voltage, just replaced orginal with the drv8825.

    bye
     
  8. Michael Frampton

    Michael Frampton Well-Known Member

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    Been told not to run over 50mm/s..seriously considering board upgrade; )
     

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