It's an UM2 with 1043:28 printing time.
As first it starts printing fine but usually somewhere on the first layer (depending on the size of the print) it stops extruding.
What I'm suspecting is happening is when I'm using the atomic method and pulling the filament out the filament is breaking off and remaining in the hotend. When I then feed new filament in its the peice that's remained in the hotend that's first extruding and the new filament is pushing against this which then is causing it to have the plug at the end which results in the blockage. I may well be wrong though.
As for the Teflon you mentioned I'm not sure exactly what you mean by this and even less sure on how to check it. Lol.
What printer ? How many hours of printing?
How does it react when starting a print?
Did you check the teflon?
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