# Issues printing with Ninjaflex

**URL:** <https://forum.lulzbot.com/t/issues-printing-with-ninjaflex/25758>\
**Category:** Filament\
**Created:** [June 14, 2023, 6:58pm UTC](https://forum.lulzbot.com/t/issues-printing-with-ninjaflex/25758 "2023-06-14T18:58:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![emgc1703](https://avatars.discourse-cdn.com/v4/letter/e/a587f6/32.png) [@emgc1703](https://forum.lulzbot.com/u/emgc1703)\
**Post date:** [June 14, 2023, 6:58pm UTC](https://forum.lulzbot.com/t/issues-printing-with-ninjaflex/25758/1 "2023-06-14T18:58:51Z")

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Hello!  
I’ve been trying to get Ninjaflex to print on a Lulzbot Taz 6 printer, and while I believe the settings I have to the filament are all set, I’m having issues with the filament bunching up underneath the Idler and the hobbled bolt. I can see that it is feeding into the extruder/hot end for a few moments but then it gets stuck and I have to undo the tension and allow it to get unstuck, though that is obviously not an efficient process. How could I avoid/fix this issue?

Thanks in advance for any advice!

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**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [June 14, 2023, 7:32pm UTC](https://forum.lulzbot.com/t/issues-printing-with-ninjaflex/25758/2 "2023-06-14T19:32:55Z")

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The standard Single Extruder (not to be confused with the SE) is not designed for flexible filament.

For that, you can buy the [SE Tool Head | 2.85 mm | Single Extruder | 0.5 mm](https://lulzbot.com/store/lulzbot-se-tool-head-nickel-plated-copper-0-5-mm-kt-cp0136?ref=KT-CP0136) or you can print up the body ( [https://download.lulzbot.com/TAZ/accessories/tool\_heads/version\_2/Flexystruder\_v2/production\_parts/printed\_parts/flexystruder\_body\_v2.0\_for\_hexagon/flexystruder\_body\_hex\_v2.0b.stl](https://download.lulzbot.com/TAZ/accessories/tool_heads/version_2/Flexystruder_v2/production_parts/printed_parts/flexystruder_body_v2.0_for_hexagon/flexystruder_body_hex_v2.0b.stl)) and transfer over parts to convert your Single Extruder into a Flexystruder. Assembly instructions and details are on the LulzBot OHAI site - [OHAI: Open Hardware Assembly Instructions](https://ohai.lulzbot.com/project/lulzbot-taz-flexystruder-v2-assembly/hot-end-tool-head-assembly/)

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<div class="post-metadata">

**Author:** ![TimPostma](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/timpostma/32/12492_2.png) [@TimPostma](https://forum.lulzbot.com/u/TimPostma)\
**Post date:** [July 2, 2023, 9:12pm UTC](https://forum.lulzbot.com/t/issues-printing-with-ninjaflex/25758/3 "2023-07-02T21:12:10Z")

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Generally from what I heard half the speed of pla should work so I would start at 15 mm/sec then work your way up