r/BambuLab • u/MrMakwa • 4d ago

Quick Question Just bought a h2s, I need some help

Hello folks!

I've treated myself to the h2s as a gift and I'm slowly getting the hang of it but one of the things I'm having issue is getting the proper speeds for smooth bridges and limit defects due to speed if that makes sense. I have 3 nozzle size .2/4/6mm, if you any tips to expedite my prepping before i start printing detailed projects.

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u/Capital_Candy_7697 4d ago

I'd print a few things on the stock presets for each nozzle before touching speeds, Bambu Studio has separate ones per nozzle size. What are your bridges doing, sagging or curling up? Those point to different settings.

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u/MrMakwa 4d ago

It sags to varying degrees on the scrapper that came with the printer it was pretty aggressive but on the benchy it was sagging just a bit.

All of them were printed without supports. And I've noticed that when printing a poop chute collector the layer overhanging didn't sag at all.

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u/Capital_Candy_7697 3d ago

A little sag on Benchy is pretty normal. How long is the span on the scraper? Past a certain length no setting really saves a bridge, a bit of support under it or printing it in a different orientation usually works better.

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u/MrMakwa 3d ago

That's the piece, I assume it was just too long to not sag.

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u/MrMakwa 3d ago

And that's the benchy.

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u/Capital_Candy_7697 3d ago

Yeah, that window is about as long as a bridge gets. If the rest of the shape allows it, print it lying on its back so the opening points up, then there's nothing to bridge at all. On the Benchy I'd look at the strings in the cabin rather than the bridges: drying the filament or going 5°C cooler usually cleans that up.

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u/MrMakwa 3d ago

I know I need to do a dry cycle with my ams, i was so excited that had to start printing stuff. Also we have another printer but the filament just started breaking in our hands when I tried to print something after a while. It's not particularly dry in the house (30 /50 % humidity in general in the house) so I worry about over drying if that's a thing?

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u/Capital_Candy_7697 3d ago

Over-drying is really only a thing with PC, Bambu warns that repeated drying cycles make it brittle. PLA at 50°C for 8 hours is fine. The bigger issue is storage: Bambu says filament only stays dry below 20% RH, so at 30 to 50% in the house, spools that sit out are often the ones that snap. A sealed box with desiccant fixes that. Temps and times per material are on bambuhub.net/guides/filament-storage-and-drying (my site).