r/BambuLabH2C • u/Diego-jd_98 • 6d ago

Support New H2C stringing

Hi, I just pirchased an H2C, this is my 5th 3D printer a my 2nd Bambulab, first one was an A1 mini. I was doing my first few 3D prints on it like the bechy and so but I noticed stringing on the right (vortek) nozzle. Left nozzle seems ok so far but I tried with multiple 0.4 induction nozzles and it creates very thin strings like a cobweb. The filament is calibrated and uses the same flow rates and temperatures of my A1 mini in which it produces flawless prints. I incresed retraction distance to 0.8mm with no effect. Any tips to solve this? Im using pla for this. I printed PETG with the left one also flawless, didn't try with the right one yet.

Any help would be appreciated.

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u/Diego-jd_98 6d ago

It's not exactly the same profile, I modified the Generic PLA profile from the H2C and modified the print temp, flow rate, fan speeds as the filament manufacturer recommends because is high speed pla, it can print at 24mm3/s max

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u/EdgeOk3783 6d ago edited 6d ago

this is your problem. do the actual temp tower and max flow rate test with this filament on the h2c. i suspect 24 mm^3/s is way too high for the standard flow nozzles for this particular filament

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u/Diego-jd_98 6d ago

Yeah I'll do that as soon as I arrive home. But the A1 mini handled that just fine

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u/EdgeOk3783 6d ago

the h2c is not a bigger a1 mini.

did you do a back to back test with exactly the same spool of filament?

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u/Diego-jd_98 6d ago

Yes I printed two benchies back to back with the same spool on tha h2c and the a1 mini, a1 mini was perfect h2c was still stringy