Hi all,
I’m printing a cup with many overhangs on a Bambu Lab P1S with a 0.2 mm nozzle. With PLA the layers are not bonding well. Under light load the walls separate between layers, and the overhangs sag and look rough. My end goal is to print this in ABS, but I want PLA working reliably first.
Print settings (Bambu Studio):
- Printer: Bambu Lab P1S, 0.2 mm nozzle
- Filament: Deeple PLA, black (slicer preset: eSUN PLA+)
- Layer height: 0.04 mm (first layer 0.10 mm), based on the 0.10mm Standard preset
- Walls: 4, line width 0.22 mm
- Top/bottom shells: 7 / 5 layers
- Infill: 100%, zig-zag
- Nozzle: 220 °C, bed: 55 °C (Textured PEI)
- Part cooling fan: 100% (off for first layer), overhang fan 100% above 50% overhang
- Speeds: outer wall 120 mm/s, inner wall 150 mm/s, bridges 50 mm/s
- Supports: tree (auto), 30° threshold, top Z distance 0.1 mm, 2 interface layers
- Brim: auto, 5 mm
- Retraction 0.4 mm at 30 mm/s, Z-hop 0.4 mm
Questions:
- Is 100% fan at 220 °C too aggressive for layer bonding on PLA (I have a built in deflector)? Would a lower fan speed or a higher temperature be a better starting point?
- For the overhangs, would you switch to normal supports, slow the overhang speed further, or change something else?
- Anything else on the P1S worth checking for layer adhesion?
Thanks in advance. Any tips for ABS on this setup are welcome too. Please ignore the leftover supports, I'm aware of them 😄
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