Hmm. What am I doing wrong? Why are the bridges coming out so crappy? #annoyed
Temp? Speed?
How could they come out well without support? The overhang angle transitions from 0 to 90, so at some point past 45 it is bound to fail.
Crazy overhangs like that work best the lower you go with layer height. As you go lower, a larger percentage of the next layer is still touching the overhang. Try lower layer height, also play with temperature and a fan. PLA loves to be cooled off almost immediately, but you’ve gotta be careful that your hot end can take it. If you want to give it time to cool between layers, print a cooling tower next to this so that the nozzle moves away, keeps material primed, and then moves back to continue the next layer.
This was printed at 0.09mm layer height, 215 degrees at 100 mm/s. I did one before at 0.06 at 50mm/s. It was better but not much better.
@ThantiK thanks for the tips!
Try speed 20.
It doesn’t matter how well you can print overhangs, nobody can print 90 degree ones, so it will always get crappy at some point. The circle needs to be a truncated teardrop with a slope no greater than your maximum overhang capability to get a clean print.
A lot slower and a lot cooler. Try whatever temp the PLA starts dripping out +5C. I can print PLA down to 170C. Also suuuuuper slow as the overhangs get past 45°. m220 s25 is 25% speed. And a fan. And what everyone else said.