Started printing this filament shrinkage test and had to leave the house. When I came back, the whole upper half of the part had shifted after the first few layers, and it left two solid blobs attached and one ball of spaghetti. The magnetic bed doesn’t appear to have moved. Part is still solidly adhered to the print bed. How did this happen, and how can I keep it from happening again?

  • MonkeMischief@lemmy.todayEnglish
    1·
    4 months ago

    Weird possibility! I once tried to lubricate my machine and put a drip or two on the threaded Z axis rod. BAD IDEA.

    This lead to VERY minor slippage once the gantry hit a certain height, and it would do exactly this. Lots of loud collision, very scary.

    …So make sure your Z rod isn’t slipping, or slippery?

  • abcdqfr@lemmy.worldEnglish
    0·
    5 months ago

    Test failed successfully. Excess material hit the bed, cooled, head collided on next pass, layer shift. Keep the head clean and fine tune to eliminate over extrusion. If bed is not level and first layer bungled, same story after leveling and cleaning bed

    • amminadabz@sh.itjust.worksOPEnglish
      0·
      5 months ago

      This is the first print I’ve done after removing and thoroughly cleaning the nozzle, unclogging the hot end, and adjusting the extruder clamping force. Guess it could be that the bed needs leveling, I haven’t checked it in a while.

      Honestly starting to think this blue filament is cursed, something goes wrong every time I use it. (I do dry it thoroughly every time I take it out of storage)

        • amminadabz@sh.itjust.worksOPEnglish
          0·
          5 months ago

          Not entirely sure what “cold pull” means. I unscrewed the nozzle while the machine was powered off and the hot end was room temperature. Blasted the living hell out of the nozzle with a small torch, scrubbed it inside and out with a brass bristle brush, ran one of the bristles through the end of the nozzle. With the nozzle and ptfe out, I heated the hot end to 60 C to loosen the remaining chunk of filament and pushed it out the bottom with the handle of a needle file. It came out in one solid piece. Shined a light through both hot end and nozzle individually and it looked clear.