Tips on printing super stiff filaments
I've been printing a lot of Siraya Tech PPA-CF which is at the limits of the Core One (290C nozzle temp) with a Diamondback 0.6 nozzle. It is the stiffest filament I own and I can't get it to feed into the nozzle via the Bowden bend without it snapping and if I do manage to get it past the filament sensor it snaps before entering the nozzle.
The only way I've been able to print it is by taking the top off and feeding it into the Nextruder directly like I've done for super-soft TPU. After that, it's very easy to print. I use it for my model rocket structural component and it is ridiculously strong. If I hit it, it has a metallic ring to it.
I would prefer printing from a dry box attached to the Bowden tube but haven't managed to get it to work yet. Perhaps I need a Bowden bend with a less steep angle? Any tips appreciated.
Anyway, it's interesting that for my stiffest and softest filaments I have to take my top off...