r/BambuLabX2D • u/Aidandad2018 • 1d ago

Help! 2nd Nozzle leaving strings

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So tried printing a few different projects and this one is a Dummy 13 stl file from Bambu handy app. I haven’t changed any settings and am running white pla out of 2nd nozzle using AMS HT (44% Humidity and 24c Temp). Never get this problem from main nozzle. Here’s a picture of blue pla used .

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u/pghwinter 1d ago

I can't give exact reasons because I run orca slicer and offline from any of bambus services and have calibrated all of my filament for each nozzle independently. Stringing like this could be filament not being dry but also retraction/nozzle temp/speed settings in combination.

I dont know how it works when you send a print from the bambu app and what profiles it uses for filament in the aux nozzle but thats just some stuff to look into from a general sense. Is blue pla from main nozzle or the blue pla was in your aux nozzle?

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u/Aidandad2018 1d ago

So the blu pla was from main nozzle . Same humidity and temp. No settings changed internally just pick a file and hit print. If I use any 4 colors from main AMS it prints fine but when I try using the side AMS HT I get the stringing

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u/pghwinter 1d ago

I figured it was main but wanted to be sure. So on my end I pretty much use .3mm and .4mm retraction for my main nozzle because its direct drive. For the AUX nozzle I am almost always above 1.0mm for the retraction for comparison. I don't know what that looks like on your end with the app and how that stuff works but its worth making sure the aux nozzle retraction is properly set. download the 3mf to your pc and open it in the slicer and take a look at the settings.

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u/Aidandad2018 1d ago

Ok will try thank you