This topic contains 9 replies, has 3 voices, and was last updated by 
David 1 day, 1 hour ago.
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I would like to print some flexible parts as flexible joints / seals between objects. It seems Ninjaflex is preferred by many but there may be better (newer) things to try.
Does anyone have a working profile for Ninjaflex and a concise list of tips/ pitfalls when using it? I have had Arthur (my printer) upgraded with all the bits by CEL.
Many thanks, David.
P.S. anyone tried crystal flex from form futura yet?
Or maybe even FlexiFil?
@dmullerdesign Do you have a gray extruder? Are you using a SM head or a S2 head?
I operate two Betas and four Production Robox.
I am the US/Canada Technical Support engineer for the Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/benAll upgrades done by cel, here in the uk. Not sure on colour but I’ll look (it should be correct, that’s what I paid them for!).
I can use either head, Dual Material fitted at present.
Extruders. One grey, one grey and black (I guess just changed the front part on the old one).
Both your extruders should both be fine with flex then. The black and grey versions are the same except for the top casing and an extra couple of parts. Your black one would have been upgraded.
TPU is a nice material. It flexes and returns to its shape. Ninjaflex is TPU. Because it is so soft it is hard to set up to print, feed needs to go really slow, as low as 20% regular PLA speed. TPU sticks to everything really well. Too well in some cases.
A material like nGen flex is easier to print with but is far stiffer and may not return to it’s shape if stretched, compressed or bent. It is ok for dust covers and things which would break if rigid and flexed but not so good for items which need to bounce back from stress. It may be ok for a low stress hinge.
thanks @pete, no ‘approved’ print profiles for ninja flex yet then? The other form futura flex filaments also look interesting.
In addition, I think I remember that feeding it (ninjaflex) takes a little care, and something about a bit of tube helping. I had some extra bits when my printer was upgraded so I guess this is what they are for? An explanation of that would be handy if anyone has time.
@dmullerdesign I can’t get NinjaFlex to feed through a S2 head. The SM head is the only one I have been able to get to work with NinjaFlex. I just did a couple of really nice prints with it, but had to use a V1 single material print head (SM serial) as the V2 print head wouldn’t print it.
I operate two Betas and four Production Robox.
I am the US/Canada Technical Support engineer for the Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben
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