Y hits the rear wall

Discussion in 'BigBox General Chat' started by Gianmarco Baldini, Mar 5, 2016.

  1. Gianmarco Baldini

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    Hello, I have a problem that I tried to solve through Shoutbox. No luck so I am pasting our conversation here.
    Please help.

    Hi, when autoleveling X axis is OK, but when it wants to test upper left corner (X min, Y max) it does not stop and head hits rear wall of the box. Head keeps going on Y instead of stopping to measure. Please help. All steps prior leveling went well according to the manual.

    When moving for 10mm in x direction head moves right amount, but when moving on Y it moves muc h more then it should. Here is picture of Y pullys.

    I noticed thet Z axis moves less then it should (2/3 movment)

    IMG_0180_edited-1.jpg

    Whole conversation:
    1. 56 minutes ago - Gianmarco Baldini:
      Hi, when autoleveling X axis is OK, but when it wants to test upper left corner (X min, Y max) it does not stop and head hits rear wall of the box. Head keeps going on Y instead of stopping to measure. Please help. All steps prior leveling went well according to the manual.
    2. 41 minutes ago - PsyVision:
      correct pulleys on Y axis?
    3. 34 minutes ago - Gianmarco Baldini:
      yes, it is not possible to miss it, right? Looks the same as in manual.
    4. 32 minutes ago - PsyVision:
      had it homed before hand so it knew where 0,0 is?
    5. 32 minutes ago - Gianmarco Baldini:
      Also after Homing, X is in center on 150mm, but Y is on 140, but on screen it says 68
    6. 31 minutes ago - Gianmarco Baldini:
      Yes, when I put X and Y on 0 nozzle is on correct position
    7. 31 minutes ago - Spoon Unit:
      Auto Home should take you to the front left, not the center (at least that's how it is on the dual)
    8. 30 minutes ago - Gianmarco Baldini:
      AutoHome is not on 0, it is on X150 Y140
    9. 28 minutes ago - Spoon Unit:
      if you turn the steppers off, is the movement of the x and Y axis completely smooth ?
    10. 28 minutes ago - Gianmarco Baldini:
      On display is X 150, which is OK, but Y on display is 68 and in reality is on 140
    11. 28 minutes ago - Gianmarco Baldini:
      Yes movement is smooth
    12. 26 minutes ago - Spoon Unit:
      when you Prepare > Level Bed, is the first measure point all the way at the front left ?
    13. 24 minutes ago - Gianmarco Baldini:
      Yes, first two points are front-left, then front-right, then it goes to X 0 and in Y it does not stop on upper-left. It hits the wall instead.
    14. 23 minutes ago - Spoon Unit:
      Yours is a Pro or Lite ?
    15. 22 minutes ago - Gianmarco Baldini:
      Sorry, first point is right-front, then left-front, then it hits the wall on rear-right
    16. 22 minutes ago - Gianmarco Baldini:
      It is PRO
    17. 21 minutes ago - Spoon Unit:
      Mine is a dual, so we are on different machines
    18. 21 minutes ago - Gianmarco Baldini:
      It hits the wall on third step REAR-LEFT. I have some trouble typing
    19. 21 minutes ago - Spoon Unit:
      It sounds like the system has the dimension of the bed wrong
    20. 20 minutes ago - Gianmarco Baldini:
      Yes, it seams so. I do not know how to fix it
    21. 20 minutes ago - Spoon Unit:
      I think there's a way to look at that in the firmware, but I'm not fast enough with this all to remember where precisely
    22. 19 minutes ago - Spoon Unit:
      there's no Y+ end stop, so the system relies on the firmware for this
    23. 19 minutes ago - PsyVision:
      the firmware has it ok, ive been reading it lots :)
    24. 18 minutes ago - Spoon Unit:
      is there a way to see on the LCD what the firmware thinks the dimension are ?
    25. 18 minutes ago - Gianmarco Baldini:
      It is latest one from December RC3
    26. 10 minutes ago - Gianmarco Baldini:
      Maybe steps on y motor are wrong. Because display said Y68, and when I move it to 0 it goes to 0, but it travels 140 - not 68 mm
    27. 7 minutes ago - Spoon Unit:
      ahh - now that makes me wonder about whether you have the cogs right
    28. 6 minutes ago - Gianmarco Baldini:
      Cogs?
    29. 6 minutes ago - Gianmarco Baldini:
      What is cog?
    30. 6 minutes ago - Spoon Unit:
      sorry - probably wrong term
    31. 5 minutes ago - Spoon Unit:
      the metal things with teeth that transmit motor motion to the pulleys
    32. 4 minutes ago - Gianmarco Baldini:
      But there is only one way to put it together
     
    #1 Gianmarco Baldini, Mar 5, 2016
    Last edited: Mar 5, 2016
  2. R Design

    R Design Well-Known Member

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    Double check that you've used the right motors (check all of the specs) and the right pulleys (different numbers of teeth).
     
    PsyVision likes this.
  3. Gianmarco Baldini

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    My bad, I swapped z and y motors. Probably it happens when you assemble printer at 3am.
    My apologies for taking your time, and many thanks. You saved me a lot of time.

    Best regards
    Gianmarco
     
    PsyVision likes this.

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