Suitable resin chemistries April 16, 2014 06:04AM |
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Re: Suitable resin chemistries April 16, 2014 07:49AM |
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Re: Suitable resin chemistries April 16, 2014 05:24PM |
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Re: Suitable resin chemistries April 16, 2014 08:39PM |
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Re: Suitable resin chemistries April 17, 2014 03:33AM |
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Re: Suitable resin chemistries April 17, 2014 04:44AM |
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Re: Suitable resin chemistries April 17, 2014 06:33AM |
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Re: Suitable resin chemistries April 17, 2014 07:52AM |
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Azrael511
UV epoxies, known as cationic UV systems, are also generally heated at the end of polymerization to help drive it to completion.
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Re: Suitable resin chemistries April 17, 2014 07:59AM |
Registered: 13 years ago Posts: 7,616 |
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nastybyte
Is there any opensource development being done in this area?
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Re: Suitable resin chemistries April 17, 2014 12:42PM |
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Re: Suitable resin chemistries April 24, 2014 05:11PM |
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Re: Suitable resin chemistries April 25, 2014 03:02AM |
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Re: Suitable resin chemistries April 25, 2014 09:32PM |
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nastybyte
a DLP printer would be much simpler, but would have a very limited build volume and also a definite limit to resolution.
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nastybyte
There's one thing i don't understand: whether you're working from top or bottom, there will be times when you print at a point with uncured resin below/on top of the desired "pixel". Beam intensity will decrease exponentially, won't this result in a varying region of undercured material? How is this problem overcome, do you rely on the UV absorbance of the resin being high enough that this region will be negligible?
Re: Suitable resin chemistries April 26, 2014 06:46AM |
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A2
I've been looking into this more, and there is a new DLP-SLA technique where you can expose tiled portions of a much larger image with the same resolution 25microns X/Y.
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A2
DLP-SLA build size with a 1920x1080pixels is 192mm x 108mm (7.5 in x 4.3 in) at 0.10mm resolution, which is as good, and possibly maybe a little better than the Shapeways ultra detail DLP-SLA printer.
I think that's a pretty big part considering you can go over 14.0 inches in the Z-axis.
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A2
Disadvantages STL (laser)
1. Can be slow to cure a whole solid layer, and large object take longer to build than DLP-SLA.
2. Vibrations need to be isolated from the printing process or part geometry and surface finish will be effected.
3. Requires XY linear guides, i.e. more mechanics, and stepper motors required.
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Re: Suitable resin chemistries April 26, 2014 09:26AM |
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Re: Suitable resin chemistries April 26, 2014 09:53AM |
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