Printed with NinjaFlex on X1-Carbon with door open to help dissipate the heat. Can someone help me out here as the side wall looks clean, seem on side wall look deeper than I like but at least it a clean seem.
The problem is it gets real sloppy where the fillet starts (see pictures). Note that I printed it upside down (like a cup) and am using a .4 Bambu nozzle. I tried printing at nozzle temp 220c as well as 245c. BTW, NinjaFlex has a recommended temp of 225c - 245c. My Filament setting on the X1 were set to Generic TPU. I have some Bambu TPU coming in later this week. I will try this, but I suck at TPU printing and need help with setting. Also note that NinjaFlex says they require no drying of their filament before printing. Kida weird but this filament was straight out of the packaging.
Thanks for any help.
If I’m honest, I think you may be expecting too much. Fillets faced down are significant overhangs. That may be in the 60-70 degree range at the start of the turn. So it is expected to see poor quality there. To fix that you can add supports (which is almost always a bad idea with TPU), change it to a chamfer, or optimize the expected issues and hope for the best.
Again, I suggest against supports. They are too difficult to remove in TPU.
The next fix is to add a chamfer instead of a fillet. A chamfer is a straight 45 degree angle and the printer can handle that fine.
If that isn’t an option, then you can optimize for the problem. Overhangs print better at very fine layer heights. So going from .28mm to .08mm can make a significant difference. Also, using more fan can also help if the fan setting is low. Going slower or faster kinda depends, so I’ll let you play with that on your own.
P.S.
I guess you can also print it upside down, fillet up. That will improve the fillet but make a mess of the inside top because of the bridging.
