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Partially Solved Shifting Layers in Y axis

Discussion in 'Troubleshooting' started by CrazyCat, Feb 26, 2015.

  1. Rwalker

    Rwalker Member

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    Hi Mike,

    Do you have a tutorial somewhere for replacing them? Or can you identify what screws get the bearings off the carriage.

    Thank you,

    Rian
     
  2. Mike Kelly

    Mike Kelly Volunteer

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    Watch this to learn how to assemble the X rails


    When you get the extruder carriage off the bearings are press fit in place. You can use a vice and a tube or something to receive the bearings as you push a new one in from the other side.
     
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  3. SheepJeep

    SheepJeep New Member

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    Hi just found this post. I'm also having issues with x-axis shifting. I sent Team Robo an email and they told me to level out the X-axis by lowering the Z-Axis to 1-2mm above the plate. Tried that but didn't help. Any ideas on what I can do to fix this?
     

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  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    If the X (or Y) axis jumps or shifts during a print (Assuming the model is not bad) is almost always caused by a loose drive component.
    1) The belt itself might be too loose. That will cause the drive to skip/jump teeth.
    2) one of the pulleys it runs though is sticky or loose/wobbling.
    3) one of the drive pinions on the motor shaft is loose.

    Those are the most obvious culprits. In some cases it can be caused by a mechanical obstruction (cable is getting caught or tangled on something else while that axis is trying to move).
     
  5. Mike Kelly

    Mike Kelly Volunteer

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    Could be belt skip or binding on the X bearings. Are you able to move the carriage freely by hand with the power off?
     
  6. CrazyCat

    CrazyCat Member

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    Hey there, I have removed the carriage and one of the linear bearings is definitely bad and missing a whole row of balls. I'm working on getting my hands on a vice to press the new bearings in that robo sent me. Hopefully this will solve my issue yay!
     
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  7. Ben R

    Ben R Active Member

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    Easy press in with a c clamp. Ia vise is admittedly easier. Tapping them in and out With a hammer and plastic drift works easily too.
     
  8. CrazyCat

    CrazyCat Member

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    Hey there, thanks for the c clamp idea it worked beautifully. I have reassembled but am having an issue where when I slide it to the right it screeches which may be a lube issue, but it also causes the left side to raise up off of the bolt. I have tried making sure it is level on both sides but this does not seem to resolve the issue. Any ideas?
     
  9. Ben R

    Ben R Active Member

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    Rise up off the bolt? I did find they needed an initial lubrication.
     
  10. CrazyCat

    CrazyCat Member

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    By rise up I mean as i slide the carriage from left to right the left side that rides on the rods rises upwards
     
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    A video might be best
     
  12. Mike Kelly

    Mike Kelly Volunteer

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    If the motors aren't working in unison it's probably a loose set screw on the helical couplers
     

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