Just testing some flexible filaments with the E3D-Titan and I am a bit disappointed… Thought that it would be capable of flexible material like advertised, but it looks like it isn’t. Out of 15 rather short prints, I had 14 times filament knots at the pulley and after each fail, I adjusted things, I even completely disassembled the Titan and put it back together… Looks like that the filament guide isn’t reaching close enough to the pulley, there is a 0,8mm big gap and even more in the middle of the pulley where the teeth are deeper. Is this like it is supposed to be? What’s your experience with the Titan and flexibles?
i don’t know if you have a bad item or not
anyway
titan for a print head sound as a bad joke
it’s not as tungsten and more than 3000°C
240°C make titan less solid than alu
I changed the PTFE right before the pulley, and it got better but still some jams… Can you with your Titan “tilt” the tensioner a bit? Mine is a bit “wobbly”
I printed 4 openrc tires, some smale gears and test pices with ninjaflex i had No failures hickups ect. Titan on a BigBox 1.1 i posted my settings for slicing some days ago it might help
I would make the tip of the PTFE tube longer, wedge shaped so it fits the contour of the drive hobb and the idler bearing. Even almost slight contact wouldn’t be a bad thing.
Is this on your Dice? Which if I recall is a bowden setup. Are you using 3mm filament?
Soft TPU’s like ninjaflex will be almost impossible in 1.75 through a bowden. You are trying to “push a rope”.
Ninjaflex and similar filaments have a lower Durometer than many other TPU filament out there. You might have more luck with a semi-flex, or other TPU out there like the stuff from sainsmart on Amazon.
Also there is always Fenner Drive Cheetah Filament. It has essentially a hard outer coating to allow it to feed in a bowden, but then the coating melts into the central flexible core as it extrudes.
But at the end of the day flexible filament is best left to a “direct drive” + “on carriage” extruder.
@Eclsnowman Yes, this is on the DICE with a bowden. I can print with Polyflex, what is a bit stiffer but still flexible, but Filaflex jams in 95% of the time. Thought that the Titan would enable flex filament via bowden…
If you mounted the extruder above so it aimed down to remove the 180deg bend in the Bowden it would help. Also print hotter for Bowden to eliminate back pressure and disable retraction. The problem is any small catch, drag or nozzle back pressure causes the filament to compress and then it looks to find any way it can to release that compression (sideways out the extruder usually).
You could try to create a direct-drive version of Your DICE (maybe with a little bigger print volume) in order to efficiently print with very flexible filaments. Than you could try to use this extruder design: https://flexionextruder.com/ Review of it on Maker’s Muse: https://www.youtube.com/watch?v=pysK-l3PTWY
