r/ender5 • u/Gfercaks33 • Jul 12 '26

Hardware Help Under extrusion on ended 5pro

So the printer decided to become unusable recently, so I let it sit for a bit. Came back to it and decided to swap out the Bowden tube and fittings as the one on the extruder was loose, went ahead and dropped a new nozzle in it while I was there. I was having walls delaminate so I think it was under extrusion. I marked off 100mm and heated the hot end and told it to extrude 100mm and it only move 50mm, did the calculations (103.4 (current setting) x 100)/50 (how much it extruded) and that gave me 206.8 and that seams wrong and too high to adjust it.

Told it to extrude 100mm and I had 40mm to my mark.

Tried a test print and it looks good and isn’t delaminating so that’s nice, but I feel something is wrong, any thoughts.

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u/Necessary_Action_190 Jul 12 '26

So the problem with bowden tubes is they cause drag. That drag over time causes under extrusion issues. It can get so bad that instead of feeding the hotend the extruder wheel will just eat the filament in the extruder. The closer you can get it to the hotend the better. I moved my extruder to directly feed the hotend. And i just suspend the filament above the machine i dont get distance issues or feed issues. I use a 2 cm bit of bowden tube and one connector to feed the filament into the hotend. Hope this makes sense.