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Loading TPU/Flex  

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Mike Daneman
(@mike-daneman)
Estimable Member
Loading TPU/Flex

What is your guys experience loading TPU or FLEX into CoreOne+?  I got and assembled one about a month ago and had trouble loading NinjaFlex (95A) into it.
First I tried to feed it through the normal PTFE tube path. I loosened the idler screws and turned off the side filament sensor (using the orange switch on it) and cut the filament tip an angled. However I could not get the Nextruder filament sensor to trigger and starting loading.
I then removed the PTFE tube from the extruder and manually fed the tip of the filament into the extruder and it felt like I was getting it past the sensor. However, even in that case the automatic loading did not trigger.
The way I managed to load it is by disabling both filament sensors, manually feeding the filament tip into the extruder, and then hitting the "Load" button.  That worked fine and I was able to print with it.  However, this seem like a painful way to do it, especially considering the CoreOne+ is advertised as having "easy flexible filament loading."
What has your experience been. Any tweaks I should make to be able to load TPU through the PTFE without opening up the printer lid?

Thanks.

This topic was modified před 1 day 2 times by Mike Daneman
Napsal : 27/02/2026 5:52 pm
David R. Campbell
(@david-r-campbell)
Trusted Member
RE: Loading TPU/Flex

Once you get the filament past the Nextruder filament sensor (that is the challenging part), use the Filament menu to "Load Filament".  That will start the Nextruder rotating to bring it in.  

Posted by: @mike-daneman

What is your guys experience loading TPU or FLEX into CoreOne+?  I got and assembled one about a month ago and had trouble loading NinjaFlex (95A) into it.
First I tried to feed it through the normal PTFE tube path. I loosened the idler screws and turned off the side filament sensor (using the orange switch on it) and cut the filament tip an angled. However I could not get the Nextruder filament sensor to trigger and starting loading.
I then removed the PTFE tube from the extruder and manually fed the tip of the filament into the extruder and it felt like I was getting it past the sensor. However, even in that case the automatic loading did not trigger.
The way I managed to load it is by disabling both filament sensors, manually feeding the filament tip into the extruder, and then hitting the "Load" button.  That worked fine and I was able to print with it.  However, this seem like a painful way to do it, especially considering the CoreOne+ is advertised as having "easy flexible filament loading."
What has your experience been. Any tweaks I should make to be able to load TPU through the PTFE without opening up the printer lid?

Thanks.

 

Napsal : 27/02/2026 6:53 pm
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