NinjaFlex filament

I was told to run 9-15mm/sec on flexible filaments. I was told this from the guys at matterhackers and saw Barnicuel run it slow and get a good print. Mike was right he was running it on a ultimaker. so the direct feed robo should do as good if not better at slow speeds,

 

I added an oiler to my filament and now I'm happy to say that ninjaflex is printing like a champ once again.

 

Also another good suggestion . I heard oiler helps. I just printed one for myself.

 

I'll get around to printing one but for now I'm using a paper towel and some zip ties

 

Ok just ran it with ninja flex and the brass tube. 225 hot end, 55 bed, 0 retraction, 10mm/sec. Blue tape bed with aquanet on top. Robo3d r1. Thanks for the brass tube idea. First layer was a little touchy but rest worked out.

 

I tried using the brass tube in the feed hole and ninja flex still doesn't work. I also thought about using a pen tube but what's the easiest way to get ink out of a tube without making mess?

 

You have to make sure you turn retraction off, set the temps, and run it really slow. Also, check the tension on the screws that push the filament into the hobbed bolt.

 

Also de burr both sides and insides of the tube. Run some PLA throughand make sure it doesn't hang up and the tube is straight

 

Ok just tried starting an iPhone case, and I set it up to run 4 skirts, it took 3/4 of the way around before it starting feeding consistently. I basically watch it while it is heating up and use the tweezers to extract the stuff bubbling out. Well I guess this stuff is so stretch that I must be pulling more than just what is bubbling out. So my recommendation is to run at least 10" or 254mm worth of skirt before you start the main print.

 

Do you have to run a different size nozzle, other than the .4 that comes with the Robo.

 

Running the .4. Only upgrade is the brass tube. I think I need to numb the bump up another 5degrees from the settings I posted.

 

I soaked the pen tube in some water and used toothpicks to clean it out.

 

Lets see pictures.

 

Pictures of the pen/brass tube?

 

no roberts prints he working on.

 

Ran by MatterHackers at lunch, and they recommended I may have to run the extrusion multiplier up around 125% to get a more consistent fill.

Also I need to run test cases to calculate shrink because it's tighter than it should be.

I'll try this tonight if I can.

 

I still cant print with ninja flex, I have the brass tube, I turned off retraction, I have the right temperatures, I have the feed rate at 9mm/s and the tension on the screws is good. But the ninja flex just keeps slipping from the hobbed bolt. I also cleaned the teeth of the hobbed bolt too and nothing works. Any help is appreciated.

 

Ok, what revision of the Robo3d do you have? Depending on your answer maybe @Mike Kelly might be able to chime in about if your hobbed bolt might be the problem.


Also, I heated up the printer head and manually feed the filament before I buttoned it up and screwed it in place.

Also, here is the calibration file I made to test the shrink.