filament runout/unload issue
Hi,
I just upgraded my mk2s to the mk2.5.
I wanted to test the filament sensor so i started a small print and cut off the filament to see what happens.
The printer correctly detects it runs out of filament so far so good.
But then it asks to press the knob to unload the filament. When I do this it tries to unload but the cut off end of the filament gets stuck underneath the ptfe tube above the sensor. The stepper starts to skip steps and the filament never comes out ofcourse.
Without ptfe tube it unloads correctly but it is not meant to work without ptfe tube right?
Loading filament without ptfe tube doesn't go well..
Anyone has a solution?
Re: filament runout/unload issue
check printed parts and make sure everything looks aligned? and the tube is round inside, not oval? (getting squished) it needs to go passed the PTFE tube to know it's out, so it needs to retract it to go back into the tube too... if its not aligned or somehow that part of the filament is really bent it may not go into the hole.
i just got mine together so no idea if i'll run into the issue but from the looks of it, it could get stuck in some scenarios i guess.
Re: filament runout/unload issue
Hello eric,
Thanks for your reply.
The ptfe tube was oval but i made it round already. It didn't solve the issue. The printed part also looks good. I can't see any problems with that.
To me it looks like the bend in the filament is too much. It needs to get back up really straight to go into the ptfe tube.. now it bends a little hitting the edge of the ptfe. I printed some filament sensor cover from thingiverse now that is easier to open. When the printer runs out of filament I just open the cover before unloading...