Hi, I’m new to printing. I got myself a Kobra 2 and it was printing fine when I got it. But recently it started to knock the prints off at random times. I have done several recalibrations, adjusted the Z offset up and down. What I have noticed is that all of these models seem to have a small overflow of material which I’m guessing the nozzle is bumping into. But I have no idea what causes it. I’ll post the latest print that failed, there the extra material is more pronounced than usual. Any suggestions what I should adjust? (Btw I’m using Octoprint)

  • @IMALlama
    4•1 year ago

    Post a picture of your first layer, or just the underside of this print. It looks like your nozzle is quite a bit too high, but it’s hard to tell.

    Since you said you had good adhesion before (with the same filament, right?), here are some things to look at:

    • clean your bed! If it’s removable, dish soap works well. IPA also works well, but you want the 90% or 95%
    • first layer squish. Too much will give you elephants foot. Too little will result in poor adhesion
    • have you changed your bed and/or first layer temperature?
    • have you changed your first layer speed? Slow is good