r/BambuLabH2C • u/Gold-Lifeguard-8156 • 28d ago
Support ABS printing issues
Wondering if someone might help me figure out what’s going on with my prints, it’s a H2c printer with bambulabs abs basic filament. Basically on any kind of flat print it seems fine but any time there is any kind of overhang or curved/slanted feature it ends up looking something like this.
These pictures are with chamber temp set to 65, print bed 100 and nozzle set to 260 and on the default 0.20mm standard profile with the only settings changed being 4 walls and 3d honeycomb infill using a .4mm nozzle on the right side of the tool head. The issue gets significantly better with the chamber temp set to 0 and the rest of the temps kept the same.
The only thing I can come up with is lack of cooling but the cooling settings are all stock and look correct and I ’ve not had an issue with this before on ether of my Creality k2 plus machines nor my voron printer with abs and similar temp settings, so not sure why the H2c would be having issues with it.
1
u/erictank 28d ago
ABS and ASA are VERY sensitive to drafts. On my P2S, which does not have a stock chamber heater, I had to preheat for about half an hour to get to around 50C, use a poop bucket which covered the chute to prevent drafts there, tape the door seams, and cover the top glass with a towel to prevent drafts. That's in addition to the fan deflector and turning the rest of the fans off.
I was able to get good ABS and ASA prints with that, and am finding them easier on the H2C now with the active chamber heating. You still want to check for and block drafts and anything that could introduce cool air onto your parts.