HELP!! I’ve been printing with my Ender-3 V2 with a Bowden extrusion, for 9 months…..pretty constant, with no problems. I’ve done some upgrades and maintenance over that time. All worked out well. Then suddenly it started having extrusion issues mid print periodically. Since then I’ve changed everything from the nozzle all the way to, and including, the extruder motor. The only thing not changed has been the parts cooling fan and the hot end cooling fan. The hot end fan is running constant and the parts fan runs as/when it should. I upgraded the heat break as well. I’ll get a couple good prints, and then it does it again. The extruder grinds through the filament like it’s got a clog from heat creep or bad Bowden tube. But then I can pull out the broken piece and push new filament through, basically, no clog. I’m stumped, getting frustrated. Any ideas would be appreciated.
Check the extruder brass gear. If the gear wears it will not feed the filament properly. This shows up when the print has a shape with retraction. A telltale sign is a noise when feeding the filament. It is difficult to see wear on the gear without a magnifying glass. The brass gears are inexpensive. Change it out and see if that fixes it.
Hi
When you upgraded the heatbreak did you apply new thermal compound?
Is your filament in a bind? How is your filament reel supported? Is the reel pulling off center when the filament gets to the side of the reel and binding? Is the filament overlapped itself on the reel causing feed problems? I printed an adjustable reel base with bearings, so the reel is free to turn. I backed the base away from the printer so the filament pulls off almost straight.