I’ve been struggling for a week or two with prints; both for smaller minis, and also larger, longer projects. It seems that each time I have a failure around the 370 layer point, and I have at least one support that breaks. The print quality until that point is fantastic, and it’s the support failure that is the problem. I suspect the nozzle is breaking the support, but I’m not sure, and a timelapse hasn’t helped me to identify the exact problem.
I’m currently using a tweaked version of HOHansen’s settings, combined with totalwarspammer’s Easy Supports. Here’s a link to my current settings (in Orca, as Bambu Studio isn’t showing Bottom Interface Layer for me), plus filament settings; I’ve tried various iterations of the settings to get this to work, with no joy.
I’m using a Bambu A1 Mini with 0.2 nozzle.
Textured PEI plate (cleaned with soap & water, plus isopropanol.
Orca slicer (for more options, plus the Bottom Interface Layer option in Bambu Studio seems to have disappeared).
Sunlu PLA+ Grey filament, dried for 6 hours in a Sunlu S2 drier.
My printing space has stable humidity at around 28% and temperature around 25 degrees.
After about 15 failures in a row I’m at my wits end, and cannot figure out where to go from here. Any help would be greatly appreciated.
When you state 15 consecutive failures at the same height, is it always with the same print file? Or does this happen with other prints?
If it is the latter, your printer likely requires some detailed checkup as the mechanics seem to fail.
If it is with the same print (note I can’t see your links info), I can try some suggestions; even so, without seeing it, they may be unreasonable:
change the print position (e.g. rotate)
Change the support type or style (e.g. make it thicker);
With additional effort, this would be my method:
After 15 prints (also, you may have time-lapses), you may already know it, or by looking at which height it breaks, you can identify where your print support got weak;
there are several ways to reinforce it, such as changing the support type and style (as already mentioned), using a support enforcer, etc… the best solution depends on your case;
in combo or as an alternative, printing settings such as layer height and speed can help to reduce support mechanical stress at the critical regions;
Appreciate the input, thanks @JayZay. Honeslty, I’ve tried a lot of the above suggestions you mention above, that’s why I’m getting frustrated at the moment. It’s across multiple files too.
I’m going to carry on trying to focus on strength of the supports for now, maybe with additional walls, or honeycomb infill to see I can figure it out.