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Re: Overhangs not being supported

Posted: Thu Jul 16, 2015 11:21 pm
by AK_Eric
Juuuust tried, and it has not.

I pinged the developers directly on this just to make sure they're aware of it.

Re: Overhangs not being supported

Posted: Fri Jul 17, 2015 12:57 pm
by jimmybuckets
Yeah...was able to try it this morning...still the same. They have always been good about getting back to me.

Re: Overhangs not being supported

Posted: Sat Jul 18, 2015 10:53 am
by KC_703
Curious if you could set the "Extra Inflation" distance to cover the point? Sorry if this was suggested and shot down...

Re: Overhangs not being supported

Posted: Sat Jul 18, 2015 2:26 pm
by jimmybuckets
I haven't tried that...I thought it was for making your support a little wider than your model, but who knows?

Re: Overhangs not being supported

Posted: Sat Jul 18, 2015 9:50 pm
by KC_703
I think it is for making the support wider than the model. :)

But in this case could cover the unsupported overhang... though I think it may not adjust the height of the support to accommodate the slope or point...

Would be interesting to see the preview results... would also be intersting to see how the slope is printed, I have a feeling it might be treated as an internal face (rough finish) without outline underspeed, if applied.

Re: Overhangs not being supported

Posted: Sat Jul 18, 2015 10:50 pm
by jimmybuckets
Take a look at the factory file I posted. I believe at a 45 degree threshold only the flat bottom suspended cube gets support but only under the flat area. It's not until you change the threshold to 38 degrees that everything gets support.

Re: Overhangs not being supported

Posted: Tue Oct 20, 2015 1:03 am
by AK_Eric
Because I battle with this more often than I should: Here's a head a buddy of mine modeled in zbrush for print. With S3D auto support set to 45 deg (which is silly, since my bot can print > 60), I get this:
badSupport.png
So, according to S3D, neither ear (the one on the other side is the same) needs any support under their lobes.

This is wrong on so many levels for "automatic support generation".

Re: Overhangs not being supported

Posted: Tue Oct 20, 2015 7:16 am
by CompoundCarl
You are just using too large of a pillar resolution. It will support that ear just fine if you use a smaller size. You can't expect it to pick up a thin ear like that with such a large pillar resolution.

If you need help, post the STL and I'll be happy to help ;)

Re: Overhangs not being supported

Posted: Tue Oct 20, 2015 10:48 am
by AK_Eric
Thanks CompoundCarl : I lowered the res to 1, and it put support under them. I could complain that the support is too small and sparse now, so I still now need to manually go in and add more support just so the tiny support towers won't try and tip over during print, but at least that's better.

Unfortunately, this doesn't fix my previous issues/examples, where spikes are hanging down, since they terminate at an infinitely small point, they get clipped out of the "s3d support filter" it seems: The feature is still smaller than 1mm (infinitely small at the vertex) so no "automatic" support for you, regardless of what you set the support resolution to.

Re: Overhangs not being supported

Posted: Wed Oct 21, 2015 5:20 pm
by danielhenley
Simplify will not create supports for overhangs that are smaller than it's support pillar resolution. It's one thing where it's slicer is worse than it's competition.

A work around is to import a little platform larger than the support pillar resolution and place it where you need it, that way the supports will be drawn to that object which will in turn hold up the real object.