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LePaul

Ultimaker 2+ grinding filament...bad TFT Coupler?

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Has anyone experienced filament grinding from an old TFT?  

 

I have repeated grinding going on with my Ultimaker brand PLA using the default Cura/Ultimaker PLA settings recently.

 

I have repeatedly disassembled, cleaned with a brass brush and tooth brush the hobbed knob/feeder and removed all the debris.  I also see little pieces of debris in the Bowden I can't seem to remove.

 

I have the feeder tension at 3/4 (following documentation provided by Fabrc8)

 

I have several hundred hours on my UM2+ and all I can figure out is that there's some backpressure somewhere...my thoughts are replace the TFT and Bowden tube at this point.

 

But before doing so, I am curious if my "theory" is correct...bad TFT.

 

 

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