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Vase Mode Layer Gap

Posted: Fri Nov 13, 2015 2:25 pm
by Nornerator
I've done a lot of printing in Vase mode before and haven't run into issues, but suddenly am having gaps between layers.

I suspect it has something to do with the large layer heights combined with the curvature, but it really seems like there shouldn't be an issue. It only happens in the curvy areas. When I lower layer heights down to 0.25 or less the gaps begin to disappear. However I am trying to print clear with T-glase so I'm printing between 0.4 and 0.8 layer heights with a 1.0mm nozzle. Is there some obvious setting I'm missing to fix this issue? I can get rid of the gaps by not using Vase mode, but I really need to use vase mode as the seam with the larger nozzles is really distracting.
Gaps with large layers in vase mode
Gaps with large layers in vase mode

Re: Vase Mode Layer Gap

Posted: Sat Nov 14, 2015 8:02 am
by CompoundCarl
Yes, that is how FFF 3D printing works. If you have a really steep angle, you will need multiple perimeters. You can't do it with only a single perimeter.

Re: Vase Mode Layer Gap

Posted: Sat Nov 14, 2015 9:20 am
by Nornerator
It just looks like this could be accomplished if the slicer just squished those layers together a bit more or raised the Z more slowly in that region. That would probably cause a lot of ugly over-extrusion I suppose. Or if it could do the spiral corkscrew mode until it got to regions like this and then it could get to a specific Z height and then start printing normal with a 2nd perimeter, is this something I can do in the scripts?

Its just too bad, I had to reduce my layer height down to 0.4 and switch to my 1.2mm nozzle and increase my layer width to 1.5mm in order to close the gaps. It's still nice and transparent, but not nearly as clear as it could have been.

Any tips for trying to create near-glass-clear prints that have a significant angle to them? I'm coating these with epoxy afterwards.