> the wire pusher does its duty but
I don't recommend using the motor to insert and remove filament. Instead do it by hand (lift that lever on the feeder to release tension). If the nozzle is at the proper temperature for PVA (really anything above 150C) and nothing is coming out push the head to the far corner from the feeder and try going in and out a few more times. There are a few places the filament can get caught. pushing the bowden around a bit on the head might help also such that it is angling the PVA down at different angles.
Inspect your pva because at this point it is probably ground up inside the feeder. To repair just cut a few cm off the tip of the pva and re-insert such that the ground up spot is now past the pusher-wheel. (gnurled sleeve).
There's a couple of things that can be happening here. One possible cause is that the end of the filament is hitting the side of the metal tube of the core instead of entering the hole. Straightening out the end of the filament will likely take care of this.
It could also be that the nozzle has become clogged with degraded PVA. To clean that out you need to follow these steps:
In both cases the feeder has likely started to grind the material which means the little wheel that pushes filament is likely clogged up with plastic dust. Sometimes it's enough to blow sharply into the hole on the back of the feeder but you might need to open it up. You can see what that looks like here:
To extract the filament you can simply lift on the little lever on the feeder and then manually pull the filament out.Edited by Guest
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