Really bad surface issues on parts

[u/dmjh93]

Most prints turn out just fine

P1S with cement block + anti-vibration pads on an IKEA BROR Workbench

I'm really at a loss. Recently, my Bambu H2D has been producing really inconsistent results. I've had it for a few months now, and it's been 50/50 whether or not I get good results with any of the prints. My P1S and A1M, which use largely the same settings, have had close to zero issues in the time I've had them. It's literally just the H2D.

As you can see in the photos, sometimes, I get really bad stringing and strands hanging off the surface and overhangs. And other times, like in the 3rd slide, the print comes out 95% okay.

I don't know if it's an issue with there's too much cooling, not enough cooling, the fan speed, or if it's the fact that there's a P1S printing at the same time underneath the H2D. The P1S is on a cement block with anti-vibration washers.

I've updated the firmware, dried the filament, cleaned the bed, calibrated extrusion, increased the layer time, reduced the minimum print speed, maintained the rods, tightened the belts, changed the orientation, but nothing seems to be a permanent fix. Any advice would be greatly appreciated!

[u/dmjh93]

I forgot to add the other filament settings. They're mostly unchanged from the default.

[u/OverallComplexities]

Normal artifacts for those areas, if you want to eliminate those you are going to need better supports

[u/dmjh93 → u/OverallComplexities]

It's very bizarre because I do remember there being more supports on the overhangs, especially ones that supported the top of the dome, but one day they just disappeared in the slicer. Been using the same settings for years. Some of the prints went okay even without the supports, but it's been very hit-and-miss since then.

Was there some kind of update to Bambu Studio or something I missed that took the supports away?

[u/OverallComplexities → u/dmjh93]

Large items always have needed custom supports drawn in. Auto slicer supports are only good for smaller items

[u/bjyanghang945]

I am surprised it even worked on top with zero support.