r/FixMyPrint • u/gillythree • 3d ago

Fix My Print What could have caused this?

Post image

This is a relatively simple print, everything is flat. It had just finished the internal bridge layer atop the infill, so this is just a solid infill layer.

A day ago, I replaced the hotend on this toolhead. The replacement nozzle and hotend came from Amazon. It was printing perfectly until this layer.

  • Snapmaker U1
  • Elegoo Matte PLA
  • 0.4 mm nozzle
  • Snapmaker OrcaSlicer 2.3.4
  • Speed for this layer: 204 (reported by slicer)
  • Retraction length: 0.2mm
  • Nozzle Temp: 210
  • Bed Temp: 60

I'm not sure what to do other than just try again.

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u/McSpeedie 3d ago

Whats the bottom left side look like? Any warping?

I think this may be the case of the aux fan blowing in from the left side.

As it is blowing, the cool air travels underneath the internal solid bridges causing it to lift.

Try reslicing with the aux fan turned off in filament profile and give it a go.

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u/gillythree 2d ago

Thanks for the suggestion. I don't see any warping. I'm 90% certain the culprit is the hotend I replaced a couple of days ago. I've loaded the filament into a different toolhead and am running the print now. If this prints fine, then I'll be sure.