IR sensor accuracy and deviation

Discussion in 'Calibration, Help, and Troubleshooting' started by Jean VISCONTE, Aug 18, 2016.

  1. Jean VISCONTE

    Jean VISCONTE Member

    May 15, 2016
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    I coat my bed with a drop of ELMER'S glue mixed with water and gently wiped with a tissue.
    I have found then 1st layer problem: nozzle is touching the glass, and that lead to blocking filament, my TITAN growls and the gear gets quickly full of PLA powder....

    Remedy: make sure your bed center is mirror clean, the sensor is troubled by PLA reflectivity and sees probably the bed more distant than it is really, thus fooling the controller. I loose 0,7mm, which make a 1st layer of .2 stuck to the glass.
  2. richgain

    richgain Well-Known Member

    Dec 18, 2015
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    I had exactly the same problem. That's why I fitted one of these and moved the IR sensor off the print-head.

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