I have a bltouch clone which work fine on glass bed. After switching to textured PEI sheet, it’s variance trippled to 0.1mm, which make my bed mesh all wobbly.

I’m I suppose to remove the steel plate when making the bed mesh? Do you home Z with a probe with this setup?

The weirdest thing is, despite all this all my prints adhere completely fine. I guess PEI is just that good.

  • ffhein@lemmy.worldEnglish
    0·
    2 years ago

    Not doubting you, but I can’t think of a logical reason for why it would be like that. The probe pin shouldn’t push down hard enough to be able to deform the PEI

    Perhaps as a workaround you could configure the firmware to probe each spot 3 times and average the result, if you don’t mind the extra time levelling would take?

    • x7tYnC6c@lemmy.worldOPEnglish
      0·
      2 years ago

      I meant the probe is deflected by the texture. Taking multiple sample is what I’m doing, yes. It take at least 5 samples for it to be reasonably smooth, which is why I’m asking other experience.

      • ffhein@lemmy.worldEnglish
        0·
        2 years ago

        You mean you think the probe slides off the bumps in the texture? I think the probe should be stiff and light enough to not do that, but perhaps you could’ve been unlucky if it’s a clone not from a well known brand (e.g. Trianglelabs… even Creality’s probe’s are supposed to be quite good afaik)

        • x7tYnC6c@lemmy.worldOPEnglish
          1·
          2 years ago

          Yes. I’m certain it is a build quality problem. The probe is just plastic and by design hang freely. Even a steel rod with bearing can easily be deflected by a few tens of micron.