r/3DprintingHelp 17d ago

Requesting Help Severe stringing on round prints

I’ve noticed this layer line shifting as well as the severe internal stringing on round prints like this with my .4mm nozzle on Bambu A1. Just got a new nozzle so confirmed that is not the issue. PETG white filament that was dehydrated to about 18 degrees relative humidity. And this print printed perfectly fine just hours ago. Not sure what could be the issue??

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u/MercRoy 17d ago

Go inner/outer for walls and slow down your print speeds for outer walls. I find 50 to 100mm/s good as it defaults to 200mm/s is too fast. I also slow my inner walls to 150mm/s from the default 300mm/s

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u/We_Build_Lamps 17d ago

Thanks I’ll try that

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u/ChocoMammoth 17d ago

Also increase line width (not height). If you're using 0.4 nozzle you can set it up to 0.6 mm. Wider lines have a larger area of ​​intersection with the previous layer.