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dirkdirk

Support depending on alignment?

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Posted · Support depending on alignment?

Actually, perhaps. I noticed some strange support behaviour. In a symmetrical part, it would do the left side, but not the right side. I havn't tried rotating the part though...

 

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Posted · Support depending on alignment?

The support is generated with a projected bitmap. Which causes these kinds of artifacts.

 

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Posted · Support depending on alignment?
The support is generated with a projected bitmap. Which causes these kinds of artifacts.

 

Maybe you could explain this for my? I do not understand how the same model is supported different depending on alignment?

So i have to check every possible alignment before printing for best supports?

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Posted · Support depending on alignment?

Maybe you could explain this for my? I do not understand how the same model is supported different depending on alignment?

So i have to check every possible alignment before printing for best supports?

 

What Cura does, is kinda like this:

NGKuKPB.png

So it takes the object. Looks from the top. However, it does this at a lower resolution. In the last picture, if there is enough purple, support is added there.

Some smoothing is done on the final support. And the resolution at which this is done is actually higher then what I show here, but I hope it helps in understanding what is happening.

 

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Posted · Support depending on alignment?

Pretty cool demonstration! :cool: It could be called 'inside Cura'... :)

 

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Posted · Support depending on alignment?

I feel a little dumb now but I don't see why a projected bitmap from top would be different when he is rotating the part on plane parallel to the bed? Or is it related to the "squares" background? Even so, it is hidden by the part...

I hate when I don't get it =) (especially when 2 people like your answer Daid -unless they just pretended understanding it :-p-)

 

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Posted · Support depending on alignment?

Location from where the pixel map is generate is always the corner of the outer box of the object, this causes the "pixels" to align differently on the model.

Simply put, it's an aliasing problem.

 

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Posted · Support depending on alignment?

I think I understand, but then shouldn't it be minor artifacts? On Dirk video it's like a full side of the part not being (or being) supported, looks big for an "aliasing" problem?

 

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