NinjaFlex filament

Might need to add some washers to increase the hobbed bolt tension. I've never printed ninjaflex so i can't be much help

 

@mark could you post a picture of your method?

 

Thanks! I didn't see it in the other thread but what did you use to hold it in place?

 

Guess my tension was off.
Bummer.

 

Well I guess I'll be raiding my desk drawer this morning for pens.

The more I think about your statement, the more I realize, the value in the design your using.

Worse case I have 10 more inches of brass tube, but the plastic will be easier to use.

 

Ninjaflex progress. Finally got it printing with a filament multiplier of 1.25. 230c
Hot end, 60c bed, 10mm/sec. Simplify3d supports.

Built a filament guide and press fit in 1/8 brass tubing to support above the Hobbed bolt and 1/8 tube below it. I got the idea from this video. http://diy3dprinting.blogspot.com/2014/07/how-to-print-ninjaflex-on-printrbot.html?m=1

my simplify3d file is attached and the stl. You can buy the brass tubing here: 8950K512. The stl file is intended for use with a 6-32 screw, which I used a tap to thread.

I am running a stock R1 with the Hexagon hot end.

 

Please see my updated post.

 

Thanks Robert, I see now that ninjaflex has a new filament that is a semi flex, looks interesting.

 

Hey everybody, first post here.

I had a really good couple of small test prints with Ninjaflex today. Before starting, I had read this forum and pulled together whatever info I could find elsewhere. I thought it kind to share my settings as well as some photos of the result. I made a guide as codeblue and 1nxtmonster suggested, using a tube for a mechanical pencil which size just barely fit down the hole in the platform. Once touching my hotend guide, I trimmed the top as close to the hobbed bolt as possible, but notched to get out of the way of the apposing bearing. (see photos)

I have performed a few mods / upgrades to my Robo3D, the three which I can attribute to the successful Ninjaflex print would be:

1) a replaced hobbed bolt
2) the guide I just made
3) Prometheus hot end

Printed 223C first layer, 218C other layers. No hotbed, using blue tape. I just kept raising the temperature slowly and hand pushing the Ninjaflex until it resembled how PLA does at 180C. I did not disable retraction. In Slic3r Printer settings, I set Retraction Speed to 20mm/s.

Test printed:
http://www.thingiverse.com/thing:35998 Crown Of Polygonia
http://www.thingiverse.com/thing:173992 0.4mm thin wall

 

looks good Bray, maybe on the hot side, what fan setup do you have, dual or single?

 

I have the stock Robo fan, but with a reprinted bracket, so the Prometheus hot end will fit. Plus, the fan mounted to the hot end.
https://www.indiegogo.com/projects/prometheus-hot-end

I can try to reprint slightly cooler. I found it was very thick at 210-215. I'll try giving it a little longer to warm up and report back.

 

I use this fan duct, going to put a second one on as well, it made a huge difference in printing.

 

I drilled out and added a PTFE tube and have successfully printed Ninja semi flex with a .4mm nozzle. Ordered a .6mm nozzle to print my Filaflex as it is even softer than regular Ninja Flex.

 

Hello, I just ordered a roll of blue ninjaflex filament and tried getting it to extrude with no luck, which I anticipated as I used basically used default PLA settings to print.

I found a tube from the inside of a mechanical pencil I have which perfectly guides the filament and I plan to use it as a guide so I can print ninjaflex. However, I am hesitant to use this plastic tube until I get more research or answers to the following questions:

Will the plastic tube melt inside the extruder over time by being used as a filament guide?
If inserted is there a barrier that would stop the plastic tube from making direct contact with the hot end?
Would a brass tube serve better compared to a plastic tube?

Help would be much appreciated, thanks!