I’ve tried to report the issue to Prusa support but they keeps trying to diagnose it as user error. But at this point I’m at a loss and presume that it’s either a firmware issue or a sensor issue on my unit.

Either way im very disappointed.

And before you ask, this is the opposite side

PXL_20240301_160413072

EDIT: I will note that this print sheet is ruined for my use case, since those patterns will be shown on the underside of my prints. But the print surface still works and can be used without issue… if you ignore the gouges that are being detailed into every print.

  • dual_sport_dork 🐧🗡️@lemmy.worldEnglish
    82·
    9 months ago

    I just had to read up on the MK4 because I don’t own one. Apparently this machine uses a load cell on the bed to detect the nozzle touch? That means that to home Z or mesh level the bed, the nozzle has to touch the build surface. This strikes me as a rather bad idea. I can think of tons of situations such as a pointy diamond or ruby nozzle, a very hot nozzle, or a nozzle with hardened crud stuck to it all causing damage to the print sheet, not to mention the potential for damage to the nozzle itself.

    Ideally the nozzle should never, ever touch the print surface. For any reason.

    There’s a purpose behind things like the BL Touch having a soft plastic probe on the end.

    • infinitepcg@lemmy.worldEnglish
      71·
      9 months ago

      In the cases you describe it should fail by ruining the print, not the build plate though. If there is something between the nozzle and the plate, it will be too far away from it after calibration, not too close.

    • the16bitgamer@lemmy.worldOPEnglish
      2·
      9 months ago

      Oh I’ve had my fair share of issues with this. i.e. little specs of the previous print color is stuck on the next print since I missed it during print clean up.

      But if I am honest, for a normal spring steel PEI sheet it’s perfect. And I prefer this to the magnetic solution like on the Mini since it lets me use Garolite/G10.

      I’ve only seen this issue with the satin bed.

    • papalonian@lemmy.worldEnglish
      21·
      9 months ago

      Hey, just wanna point out that having a touch sensor built into the nozzle is definitely not unheard of, my printer (Neptune 3 from elegoo) uses the same sensor. It’s not the most reliable sensor in the world but it got the job done until I got my BLTouch.