Filament Change Flaw with runout  

RE: Filament Change Flaw with runout

From my understanding it should retract the remaining filament about a cm or so - enough so that you can grab it from the side sensor (where the spool holder is) and pull the remaining back out.......

RE: Filament Change Flaw with runout

Well this not works, as it really leaves only a few cm left 

RE: Filament Change Flaw with runout

Are you sure the side filament sensor is working properly then? Perhaps try recalibrating it.

RE: Filament Change Flaw with runout

Well it seems it is not working properly regarding the answers so far 😀 
I'll check that , thanks

Posted by: @john-3

Are you sure the side filament sensor is working properly then? Perhaps try recalibrating it.

RE: Filament Change Flaw with runout

I have the same problem. I think the extruder doesn't have enough force to push the filament back through the filament sensor during retraction, and instead, it starts grinding the filament as the extruder begins skipping.

RE:

Posted by: @ahrimaan

when you change filament when it runs out it purges some filament and then tell you to "remove Filament form the sensor".

So everytime i have to open the top lid, remove the PTFE Tube from the Nextruder and pull out the filament.
There must be a more elegant way of doing this.

This sounds like the side filament sensor has not detected the filament runout, and it only gets detected by the filament sensor in the Nextruder. In which case the Core One purges through the nozzle and then (I believe) complains that you should remove the filament from the side sensor. Where of course there is no filament, since it has already run out and it's just the side sensor malfunctioning.

A frequent cause of the side sensor getting stuck in "I see filament" mode is excessive friction on the little lever (which translates movement of the steel ball into movement of the flag that gets detected by the optical sensor). Favorite root cause: The magnet which sits inside this lever is actually a bit wider than the lever. If it sticks out too far on the lid-facing side of the lever, it will rub against the lid of the sensor housing once the lid is mounted.

To check and correct, you will need to remove the right side panel, remove the filament sensor from the panel, and open its lid. Make sure the magnet sticks out equally on both sides of the lever, about 0.5 mm each side.

RE: Filament Change Flaw with runout

Hi all , so I calibrated the sensor and both works correctly ...until the chamber heats up , then it shows always ON for the side sensor ..... I think I have to rebuild it again. 

RE: Filament Change Flaw with runout

If the sensor only gets stuck when the printer is warming up, the screw on the sensor lever, which must move freely, could be (and probably is) too tight. Try disassembling the sensor and loosening the screw a little. The assembly instructions also warn about this - just tighten it slightly.

RE: Filament Change Flaw with runout