Which filaments bridge best / bridging settings?

Change the support, the wall, the line width, or the fan before you change the brand. Supports, PLA, and PETG are the settings pages. No thread here crowns a polymer.

The rows

PolyLite PLA lists 190–230 °C (374–446 °F), a bed of 25–60 °C (77–140 °F), 40–60 mm/s, and the fan on. ELEGOO PLA lists 190–230 °C (374–446 °F) and 35–65 °C (95–149 °F). Prusament PETG lists 240–260 °C (464–500 °F) and 70–90 °C (158–194 °F) from the Open Filament Database. PLA and PETG are the hubs. Polymaker and Prusament are the brand indexes.

Bridges and overhangs

r/FixMyPrint 1jyzpt1 is Soleyin PLA at 210 degrees Celsius with a rough underside. The score-57 comment says use support, print slower, or cut the part in half and print each half flat on the bed. The score-13 comment says reduce layer height and increase line width, and says a 0.4 mm nozzle can go up to a 1 mm line because the overlap with the previous layer gets larger. 210 degrees Celsius is the post. 1 mm is the comment.

r/prusa3d 1ojzuoe is a PrusaSlicer bridge calibration. The filament pulls back before the bridge connects. The score-44 comment says the landing perimeter is too thin and may have shrunk away. The score-11 comment says the slicer is bridging along the walls because it does not see enough landing points, and says do not bridge onto one bridge layer. A score-3 comment says extra perimeters on overhangs fit this shape better than fighting the torture test.

r/FixMyPrint 1hql799 is PETG drooling under bridges. The score-11 comment says it is not cooling fast enough. A score-5 comment says blast the fan on those sections. A score-6 comment says the bridge direction may be across the gap and points at bridge angle. The thread does not name a PETG brand. The ranked PETG row is Prusament because it has a stored nozzle. It is not the spool in the photo.

r/FixMyPrint 1h7vs34 is dry, calibrated PLA. Overhang corners curl as the angle grows. The score-4 comment says too little cooling and too much cooling can both curl a corner, and leans toward slowing down so the part has time to cool. A score-2 comment says supports still leave an overhang, so the curl remains. Another score-2 comment fixed a similar PETG curl with the auxiliary fan at 50%. 50% is that comment.

r/BambuLab 1lbn9wq asks if a cantilever will print. The score-261 comment says use supports, and use gyroid or crosshatch instead of grid because grid crosses itself. The score-43 comment says grid piles up where the lines cross. The score-40 comment has PLA+ and has read about tree supports. That thread is an overhang. The supports guide is the page for the support half of the advice.

Questions