[update] Flexi-Felix-struder mod: done

[gillespinault]

[update] OK I made it and it seems to work
Since I modified my extruder, i can print with flexible filament (i.e. the tricky Filaflex) with no problem
Here it is: http://www.thingiverse.com/thing:613645

Previous message:

Hello all,
I'd like to mod the second extruder of my Felix 3.0 in a way I could reliably extrude flexible material (such as Filaflex, arnitel, flex pla or ninjaflex). Actually TAZ develloped and shared an interesting design that could inspire this mod: http://fabsterdam.com/3dprinting/buildi ... xystruder/

I think it could be done with just modifying the extruder arm and using some more PTFE tubing. But in order to do that it would be convinient to have the Cad model (or at least the STL) for this extruder arm (and even, ideally, the whole extruder).

Would you, Felix team, agree to share this? Off course, if it works, I'll share the modified files back.

Cheers,
Gilles

[kerog]

When you replace the original with this, does it work fine with both regular and flexible filaments? Or does it *only* work well with flexible filaments?

[gillespinault]

It still works with regular filament but I did not try enough to assess clearly if it works better or worse than the original extruder. I just know for sure that for flexible filament it works much better than before.

[dognotdog]

FWIW, I have a modified extruder that uses the same bearing opposite the filament as the felix extruder, but with a different lever design, namely a long lever to attach a spring to, instead of the short & hard design of the felix. Works just fine with flexible and normal filament.

[gillespinault]

Hi dognotdog. I'm curious about your modification. Would you have a picture, sketch and/or 3D model?

[dognotdog]

I've posted about it before: http://forum.felixprinters.com/viewtopi ... 1448#p1185

The only difference is that I nowadays use ikea springs instead of the wavy washers.

[Niho3D]

I have done this MOD and it works,just changed the lever.Same springs!!

[fesch]

What does it look like when it is installed?

[frankjoke]

I do have a 3.0Dual and the left extruder is not working since xmas and I need to exchange some parts but had no time (and spares) so far but I got all now and will do the exchange and also apply this mod.

I just printed the peace in ABS (you need to lie it down on flat side).

I also bought the springs to change from the washers

Anyhow, I think of another change as well : Put a teflon tube also into the hotend.
I read in some threads that this have been done already but I wanted to check if I reaqlly should waste one of my spares now to test.

The hotend looks normally like this:

Extruder without the inner tube

And I want to put in a tube (I have 3mm outer/2mm inner PTFE as well as 4mm outer and 2mm inner at home).

Extruder With the inner tube

Did any of you do a similar mod and was the result worth the effort?

p.s.: I used Fusion 360 to construct the extruder peaces and acryl instead of Aluminium as material to show the inner tube