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NinjaFlex filament

Discussion in 'Printing Filament' started by Melody Bliss, Jan 13, 2014.

  1. Printed Solid

    Printed Solid Volunteer Admin
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    Sounds like you're doing the right things. I like the @mark tomlinson method of running the support tube all the way up past the hobbed bolt and just cutting an opening for the hobbed bolt. The more support the better for flexibles.
    Also, FYI, Taulman released a filament called PCTPE that is very flexible but easy to feed. Not nearly as flexible as ninja mind you, but still good for many applications. Probably not what you wanted to hear right after investing in a spool of ninja...
     
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  2. Jefferyfish

    Jefferyfish New Member

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    Hey NxtMonster, I too have tried all the items on your list and have only experienced modest results. The next I plan to take is to get a larger diameter extruder tip. I'm at .4 and want to try .5 and .6.
     
  3. 1nxtmonster

    1nxtmonster Active Member

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    Thanks for the quick replies. Anywhere you could link me to with pictures of Mark's tube?
     
  4. Bjorn

    Bjorn Member

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    What hotend are you using?
     
  5. 1nxtmonster

    1nxtmonster Active Member

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    I am using the hexagon hot end.
     
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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  7. 1nxtmonster

    1nxtmonster Active Member

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    Tube installed, and it's printing! Thanks for your awesome idea:)

    20141227_132503(0).jpg
     
    #47 1nxtmonster, Dec 27, 2014
    Last edited by a moderator: Dec 27, 2014
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  8. Ocsff

    Ocsff Active Member

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    I wonder if you put the Nijaflex in the freezer and cooled it if it would be stiffer and feed easier. I might try this and post if it does.
     
  9. robert sanchez

    robert sanchez Active Member

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    What was the best way to install the tube? Did you take the top off and pull the carriage out? Did you have to drill, if so how far down.

    Congratulations by the way, I still have not had the time to mess with mine, the ninjaflex is just setting their taunting me on the work bench.
     
  10. Mike Kelly

    Mike Kelly Volunteer

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    I believe they remove the hobbed bolt to put in the tube. You shouldn't need to drill with a brass tube, only if you use a 4mm ptfe tube
     
  11. robert sanchez

    robert sanchez Active Member

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    Thanks @Mike Kelly

    I bought the brass tube from McMasterCarr, here is the part number/link 8950K512 for those that can't find any locally.
     
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  12. Peter Krska

    Peter Krska Active Member

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    Putting things in the freezer will cause condensation.
     
  13. 1nxtmonster

    1nxtmonster Active Member

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    I used an ink tube from a pen that has an inner diameter that allows the filament to pass freely through. I put it down into the feed hole and marked the spot where the hobbled bolt was on it. From there I just dremeled out an opening on the pen tube for the hobbled bolt. A drop of hot glue keeps the tube from pulling up on retraction.

    It's printing right now so I can't take a picture of the whole thing. But here's the top part sticking out of the feed mechanism:

    20150110_132134.jpg
     
  14. robert sanchez

    robert sanchez Active Member

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    That is so badass I'd give you a duct tape merit badge. Great McGuyvering
     
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  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That is pretty much exactly what I did to get it working as well. Only difference is I had some old 1/8" or slightly smaller plastic tubing hanging around in the garage...(some of those bins really are larger on the inside--I swear). Notched a hole in it, shoved it in a NijaFlexed away.
     
  16. 1nxtmonster

    1nxtmonster Active Member

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    Well it doesn't jam on my anymore. And my first layer is going down like a champion. But now its doing this weird thing where after a few bottom layers it just stops sticking and will blob around on the surface. The filament does not jam, but rather it doesn't adhere to the previous layer. Any suggestions?


    20150110_135638.jpg
     
  17. Printed Solid

    Printed Solid Volunteer Admin
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    With any filament, that's a pretty good sign that you're running some combination of too cold and too fast.
     
  18. 1nxtmonster

    1nxtmonster Active Member

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    So 235C and 20mm/s would be either too cold or too fast for the ninjaflex?
     
  19. Printed Solid

    Printed Solid Volunteer Admin
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    I wouldn't think so, but that's typically the cause of that type of extrusion. I guess you cold also have a blockage or the ninjaflex could be buckling on you.
     
  20. 1nxtmonster

    1nxtmonster Active Member

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    I'll try turning it up a few degrees and clearing any blockage by running some other filament through the extruder.
     

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