Loading TPU in Core One L
Any suggestions on how to get 95A TPU loaded into a Core One L? I moved lever on the right side of the printer to disable the pressure on the entrance sensor. I can get the filament in all the way to the extruder head. I cannot get the filament to enter the sensor on the Nextruder.
RE: Loading TPU in Core One L
...remove/unplug the PTFE tube from the extruder -> push the filament through the tube until it reaches the end (on extruder side) -> gab it and pull out at least 5 cm -> push the filament into the extruder and wait until it is grabed by the extruder -> push the PTFE tube into the extruder and continue with filament loading/purging etc.
...same procedure when you want to unload FLEX filament -> unload filament procedure on the printer -> remove/unplug the PTFE tube from the extruder-> pull out the FLEX filament from the extruder -> now you should be able to remove the filament from the PTFE tube by turning the spool outside the printer.
DON'T forget to switch the filament sensor back to "normal/non FLEX" filament position!
Yes, it's tricky but it works (at least for me). I highly recommend to use a cleaning filament before loading another filament. I use a cleaning filament every time I change filament and especially when changing nozzles. By this I don't have to care about remembering which filament was loaded before - low or high temp filament.
Core One L
RE: Loading TPU in Core One L
I usually load via manual extruder controls, with filament sensing disabled. Loading usually works (takes some practice; my PTFE tubes are also oiled so it's not sticking anywhere) but unloading is dangerous as the soft filament refuses to be pushed back and gets pulled into the Nextruder gear.
RE: Loading TPU in Core One L
TPU 95A and 85A can be loaded without removing the PTFE tube. You only have to disable the filament sensors (side mechanical switch + from the settings menu). Thus the filament loading menu will change and you'll have to press continue to make the Nextruder to grab the filament. Ensure to have pushed the filament all the way down to the entry of the extruder. You can open the idler to check that if needed.
For 95A unloading generally works without issue. For 85A you have to help unloading by pulling the filament at the same time to avoid filament chewing.
To use softer TPU you need to feed the extruder directly from the top.
RE: Loading TPU in Core One L
I got it to load by running the filament sensor calibration with the flex filament. I opened the feed roller door and could see that the filament was getting past the sensor but was not being detected. I had loaded both PLA and PETG previously without a problem, but the TPU must have been compressed just enough for the sensor to not detect it.