Support tall lunar print?

Bambu Lab Software Bambu Studio
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I’m trying to print a full-A1-build-plate lunar crater models for astronomy outreach. (260mmx260mmx~10mm) Once I figure this out, I’ll share the models in makerworld. Original 3d data comes from NASA’s TEK site.

I’m trying for smooth surfaces instead of the “topographical map” of printing flat on the build plate. Rotating it 90 degrees to stand on a side, oriented to the camera front-to-back to resist plate movement, the surface is smooth, but I’m getting serious ringing and other defects on the top 1/4 of the model, even at small layer height and high quality profiles.

I tried to paint supports on the “bottom” in lines or spots between 1/4 to full height, but slicing the plate stops at 50% - generating supports - for literally hours, if it works at all. Even a small 10-20mm area of support painted in or a support enforcer added to the back causes this delay.

It finally finished the current run after nearly 4 hours. The program was not locked up and allowed me move the view and check settings. Other programs work normally. The computer slices the plate in a reasonable time (30 seconds?) with automatic supports on the crater rim and for the label. PC, Bambu Studio 1.8 (or 1.9?) and the newest 2.0 both have this issue.

Is there a way to speed up the calculation of supports?

Is there a trick to make a triangular brace that would remove like a support?

Thanks!

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You would have to manually add a feature to your model that tapers to a small contact point you can break away after the print is done. The support specific print features couldn’t be used.

You probably don’t need supports on both sides of the model, so you could make your support attach to the back side, only.

You could also try increasing the thickness of your print, which will make it more stable at the higher layers.

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How did I not think of making it thicker? :flushed: I’ll have to tinker with a thin triangle support.

Thanks!

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