So I’ve been trying to solve this ongoing issue printing this Stitch file.
I have enabled variable layers, slowed down the print to 10mm/s on the overhangs, cooler printing temp, fans at 100% (Printing with PLA).
Any other suggestions? I wish to avoid the use of supports as I dont want to make the face of the model.
One thing I can think of though, this looks like an improper flow ratio. Every filament type, broadly speaking, has a certain amount of plastic offered as it is extruded. Formulations, difference in batches, nozzle size and wear, the nozzle temps and moisture content. These things can cause the expected flow ratio to be too much or too little and both of these ruin delicate/steep overhangs. I’ve had a roll of filament that was supposed to be .94 flow ratio. It was actually 1.04 when calibrated!! That’s an immense difference.
If the flow ratio calibration in bambu slicer doesn’t get you good results, try searching up Improved Flow ratio Calibration v3 by jimcorner and follow those directions in Orca. I get such good results that way compared to the standard double pass tile method. Get it figured out in orca, afterwards, still in orca, run a temp tower test with the same settings you’re using in bambu (plus the new flow ratio) and find the temp tower section with the best looking overhangs. Once you know your flow ratio and best temp range, back-port that to bambu slicer and continue on there.
Wild shot in the dark, with advanced options, I think there is one to modify the amount of overlap layers have when doing overhangs? Increasing that in conjunction with changing wall order might help. Something like this would also probably prefer inner-outer.
