I’m changing the PTFE in my heatbreak, I didn’t realize these seem to be consumables. It started causing blockage.
A guy sent me a piece of PTFE from his Prusa MK3S+ that I could try as i was having trouble finding any PTFE quickly.
I realized I couldn’t just cut a piece and put it in, that caused a lot of filament leakage and underextrusion. The end of the PTFE toward the nozzle was a bit jagged and I believe that’s where the leakage happened. Now I’m wondering how the heatbreak and nozzle normally interface inside the heatblock, should they be touching? Should the PTFE protrude a bit from the heatbreak so there’s a bit of pressure against the nozzle when I screw it in?
When you order bowden tube it comes with a cutter. Make sure your fittings are tight.
But also heat up the hotend remove the nozzle and tube. Then push in through a piece of old bowden tube. This ensures there is no remaking plastic in the throat. Now reassemble. the old ptfe tu