Discuss anything GunCAD related. If you need help, see /c/help. If you think you're discussing a thing a lot of the time, consider making your own separate community.
Abide by the global rules or be smitten.
Shitty stock image may be changed at moderator discretion.
PPA-CF vs PA6-CF?
Does anyone have experience printing PPA-CF and PA6-CF? I had read that "PPA-CF is 48% stronger" than PA6 if you get good layer adhesion, but I'm seeing conflicting info regarding impact resistance. Anyone have input who's printed and used both?
Ppa-CF all day. Anneal it in salt and it'll be indestructible
If you're annealing at the correct temperature, there's no need to pack PPA-CF in salt. The annealing temperature is well below the un-annealed heat deflection temperature so you shouldn't experience any warping or distortion.
Salt annealing isn't needed, but from my experience my salt annealed ppa vs regular annealed ppa is a huge different. I cut a notch in my printer rail and smacked it with a hammer (I swear on my life) at least 20 times and the part didn't even bend a little. I had to sit there pushing with a soldering iron for more than 5 minutes to break off a picatinny rail
Annealing results in more uniform crystalization which generally reduces impact strength. If your salt annealed parts showed higher impact strength, that's an indication that the annealing was actually unsuccessful.