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rapidly, I let you a link about DMD in UV applications :
other stuff :
Statistics: Posted by gillou35 — Tue Apr 22, 2014 7:48 am
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I still haven't had a chance to do any resin curing tests on my conversion, but I'm now thinking it's good that I have a 400 nm in there. I first tried 365 nm and couldn't get that to transmit through the system. My next try was 400 nm and that transmitted very well, but I had thought about trying other frequencies between 365 and 400 to see what I could get away with. So now, in light of this discussion, I think I'll just stick with the 400 nm.
Statistics: Posted by James — Fri Mar 14, 2014 4:27 am
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LCD chips on the other hand can be destroyed by UV, so perhaps he was referring to LCD.
Statistics: Posted by James — Thu Mar 13, 2014 12:31 am
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a friend of mine tried this for his PhD thesis about a year ago, with the result that the UV LED busted the DLP chip very quickly.
Statistics: Posted by erenaud — Wed Mar 12, 2014 6:21 pm
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The projector I purchased for my project I got as return at a lowered price and the only problem it had was the lamp was broken. Consequently, I went with installing a 5 watt 400 nm LED. I still haven't done any tests yet to see if this will work to cure resin efficiently as my shop is still frozen solid. When summer gets here I'll do some more work on it.
It's difficult to convert to a LED because you need to find out how the microcontroller monitors the condition of the lamp and then fool the microcontroller into thinking a lamp is still in place. Without tricking the microcontroller it will see that the conditions are not right and then shut down the whole system.
I don't see why one couldn't get away with using something like Steve's power setup since it should work fine for the application. Correct me if I'm wrong here, but to the best of my knowledge current limiting is mainly to keep the brightness of the LED constant and so no special circuitry should be needed. Regardless, I used a LED driver, , for my setup.
Statistics: Posted by James — Tue Feb 18, 2014 3:56 pm
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i was wondering. what kind of power supply do you use for the UV LED?
checkout what i did last year
http://3dobjectifying.blogspot.be/2012/ ... tsink.html
optimal cooling
I have also bought a liquid cooling system if this doesn't work
Statistics: Posted by hp_ — Tue Dec 24, 2013 11:50 am
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external lamp with pmma optic pipe running into the light gate, just got the pmma so will
see how transmisive it is, the ends must be polished but thats not hard.
will keep you posted on progress.
Statistics: Posted by johnrpm — Mon Dec 16, 2013 11:43 am
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