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Help with printing Ninjaflex

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I need to print a few ruberised bits for work and bought 10M of Ninjaflex.

I cannot get it to print at all! Not even extrude through the nozzle! It just bunches/Stalls in the bowden tube.

Settings are.

Nozzle = 240C

Baseplate = 65C

Feed 110%

Speed 20

Retraction is off.

I stripped the nozzle and completely cleaned it. I can see clear daylight through the extrusion point and it prints perfectly with PLA and ABS.

I cannot figure out why the flex isnt extruding?


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The bowden has high friction with ninjaflex. So get some light petroleum oil such as baby oil, sewing machine oil, 3-in-1 oil. Put some on the filament and slide it into the bowden to get it coated in rubber. Also make sure to cut the tip of the filament to a point to get it down to the nozzle. I found the iRoberti feeder or the "plus" feeder work much better than the original feeder for ninjaflex.

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