Can't insert filament... blocked by something 3 to 4 inches from entry into ptfe tube.
Core One L several rolls of filament printed already. But insertion of filament into ptfe tube often requires undue mucking around to get the filament to finally get past whatever is blocking it. Once past it, the filament can be pushed all the way to the extruder, where it then loads properly. What is in the plastic assembly just above the filament roll (that's where it seems to be blocked)... and what is the orange 3-position "switch" on that assembly, reached from inside the chamber, for? It seems the forward position is marked with an "X".
RE: Can't insert filament... blocked by something 3 to 4 inches from entry into ptfe tube.
It is a filament sensor, you can use the switch inside to disable it which should make loading the filament easier. I have found I need to snip the ends of the filament, if it is a round blob, from when you unloaded the filament, it won't go through, snipped 45 degree nice clean end goes right through.
RE: Can't insert filament... blocked by something 3 to 4 inches from entry into ptfe tube.
I appreciate the info. This is my 3rd Prusa... always snip filament at an angle but am still seeing difficulty when loading a new roll or just changing filament. It seems when I've pushed and prodded and resnipped long enough, something eventually moves and allows the filament to pass and then everything is cool. But at the time I made this post I'd messed with it for probably 20-30 minutes, much longer than normal... and then successfully loaded after posting with another few minutes of pushing and prodding. It just shouldn't be this hard to get the filament to feed in. There are 3 positions of that switch to disable... is the "X" position the right one? Again, thanks!
RE: Can't insert filament... blocked by something 3 to 4 inches from entry into ptfe tube.
"X" moves the opposing magnet further away so there is less repulsive force pushing down on the lever and steel ball.
Anyway, I've noticed as well with this new design that occasionally it's hard to get filament to pass through because it doesn't get lined up with the opposite side Bowden tube unless it has a sharp point on it. I might switch back to my previous one. Frankly, I don't understand the point of this switch. Why not just move the magnet further away?