glacian22: thx for replying, i will test PMMA when I have time. interestingly, my projector doesn't have option to adjust brightness, the most i could do is turn on eco mode.
Statistics: Posted by g4uts — Wed Nov 05, 2014 12:37 pm
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I'm also in China , Shenzhen , I have no clue for the UV resin too ( expensive, no data sheet ... ), would you mind sharing your suppliers ?
You could maybe add a shutter to cut the light between each layer ?
Statistics: Posted by oliveenchine — Tue Oct 28, 2014 2:11 am
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Statistics: Posted by Glacian22 — Tue Oct 28, 2014 1:23 am
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Because I am based in Hongkong now, there are no easy access to resin suppliers like FTD, therefor I sourced different resin from China for test, which is very painful. and you know what, they are not cheaper.
1. The first resin I tested is yellowish transparent resin, it bleeds alot even if I set cure time to 1000ms. After I clean the basin, I found the resin around the edge are cured as you may see in the photo. I have no clue what cured these area. Did this happen to any one?
2. Take a close look at the VAT, I can see many layers of reflections of the image projected, particularly a strong projection on top layer, which I guess is FEP. is this normal? or is it because membrane or glass isn't transparent enough? will this cause bleeding to the rest of resin?
3. and in the end I did a test, I expose resin under dlp in blank, and there are still light leaks on in blank which as a result slightly cured the resin in 10-20 minutes. Is it because the resin is too sensitive? and will adding pigment help?
I wish i could understand more of these before I start another loop of tests, there are so many concepts missing in my knowledge, and I appreciate any advice or suggestion. Thank you guys in advance,
Statistics: Posted by g4uts — Tue Oct 28, 2014 12:00 am
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