Z offset wander

Discussion in 'Calibration, Help, and Troubleshooting' started by R Design, Mar 12, 2016.

  1. R Design

    R Design Well-Known Member

    Oct 7, 2015
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    One of the things that can randomly disrupt my perfect first layer is an AWOL Marvin, clipping bed clips with the IR sensor.

    But another, I discover, is the IR sensor being tugged by the ooze wiper. (Especially since my sensor got superglued!)

    Thinking about it, it's not surprising this might happen:

    - the belt used to set the IR sensor height (above the nozzle tip) is 1.5mm;

    - to wipe effectively you want 1mm nozzle / shield overlap;

    - it's easy to have a bit of camber in the rubber wiper (some bits are higher, others lower);

    - adjusting the height of the ooze bucket / wiper assembly is pretty hit and miss (big screws at the back, impossibility of precise control, a some wobble in the whole thing...)

    Any suggestions?
  2. wfredette

    wfredette Well-Known Member

    Jan 11, 2016
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    It's probably not technically correct, but I found that I had a little bit of gap between the bottom of the wiping rubber strip and the bottom of its slot. So I took advantage of that to push/pull the rubber strip into the ideal position just where it would intersect each nozzle.

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