NinjaFlex filament

The pencil tube will not come into contact with the hot zone and will not melt.

There is a barrier that will keep it from going into the hot end.

I had good success with a plastic tube. Theres really no advantage to either that i can think of.

Make sure that the tube is cut so that the filament is supported both above and below the drive gear. There's some pictures on the previous pages showing this.

Also, an oiler seemed to help my ninjaflex print

 

Ok, so I inserted about 7/8 an inch of plastic tube into the extruder and have another tube guiding the filament prior to entering the extruder, please see pictures attached. Any things to point out before I try printing ninjaflex?

 

I have done almost everything except, how do I disable retractions?

 

ok, so I got the filament to print nicely. however, I the filament spool snags on the holder and creates tension. When I am there to watch it I can feed the filament myself, but I am not always gonna be there to watch it. Should the hobbed bolt provide enough force to feed the filament by itself without the filament slipping or jamming?

 

Also try putting blue tape over the edge on the slit in the top of the robo, this will help with friction there too.

 

Big thanks to everyone contributing to this thread. Your mods helped me get some pretty good prints with ninjaflex.

There is one caveat though. I can't get the spool to feed. I have a picture attached. I also added tape on the top edge of the Robo to reduce friction, but it still won't create enough force to spin the spool. This stuff is sooo tricky! ERRRRR!! Anyone else share their feed setup?

 

Ya, that is quite the setup! I just I don't know why yours is feeding and mine isn't. Since mine is directly over the machine I would think it feeds fine. Perhaps the rod that my spool pivots on has to small a diameter?

I get some nylon filament next week and I plan to try printing a larger diameter shaft for the spool to pivot on. Nylon is suppose to slippery. So maybe it will work?

 

I don't use the overhead spool holder but rather just the backside clip-on spool holder that came with the ROBO. It works really fine for me.

Also my first real-world use of ninjaflex! I have a project that needed a pulley and rubber bands would slip. So i designed this guy:

 

I just wanted to thank all of you for helping me get NinjaFlex to work on my printer - I've got several things to print using the recommended print speeds/temperatures and that crafty tube trick.
Cheers All!

 

Hello All,

I have a Robo3D R1 and wanted to chime in with my success story.

I had issues printing ninjaflex, so I created a new profile in Simplify3D with the following configuration:
Started with PLA Auto-Configure at "Fast" quality, with 100% infill configured generate support disabled (unless necessary for the part)

Extruder Tab:
Nozzle Diameter: 0.40mm (actual nozzle disameter 0.4mm)
Extrusion Multiplier: 1.00
Extrusion Width: 0.40
Retraction disabled.

Layer Tab:
Primary Layer Height: 0.400
Top & bottom solid layers: 6
First layer settings: all 100%

Additions Tab:
Include Skirt, 1 layer, offset 4.00mm, 4 outlines

Temperature tab:
Primary Extruder: 240C
Heated Bed: 40C

Cooling tab:
Fan speed 100% all the time

Scripts tab:
Starting Gcode:
G28 ; home all axes
G1 Z5 F5000 ; lift Z by 5mm
M565 Z-.8 ; set the offset for auto-leveling mechanism, yours will need to be different based on your printer
G29 ; run auto-level
M92 Z2560 E730.90 ; Set esteps and Z steps, yours will need to be different based on your printer
M203 E1 ; Set Maximum feed rate for the extruder

Other Tab:
Default Printing SPeed: 7.5mm/s
All underspeeds set to 100%
x/y axis movement speed: 100mm/s
z axis movement speed: 16.7mm/s


Per previous suggestions, I cleaned out the cartridge tube of a ball-point pen.

I inserted this into the filament guide where the filament would normally go, and manually turned the hobbed bolt a few times to make a mark on the tube.

I then removed a small amount (half-moon shape) from the tube so that the hobbed bolt could make contact with the filament.

At this point I no longer had issues with the filament binding up after the hobbed bolt.

I had further issues with "too long extrusion prevented" and "firmware unresponsive" errors, while other filaments of even longer prints finished just fine, so I generated a gcode file and threw it on an SD card in my reprapdiscount LCD display.

I've printed a handful of ninjaflex items successfully with this method now.

I think the errors were something to do with either the computer or the software (printing over USB).

Now that I've gotten some successful prints, I'll try using a different computer and printing via USB again.

Hope this helps someone!

Jacob