Gravelle

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Gravelle
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  • Thanks ron, I will post up if I have any issues with the way I have done things.  I did a long print of about 30 hours earlier this week and posted a timelapse to my channel today.  Here it is: https://youtu.be/3m-XV9zda6w Print settings:XY Res: 84…
  • The next video is up.  This one took a while to finish mostly due to my crazy work schedule.  Hopefully this helps anyone that's wanting to replace the PDMS on their vats!!!  I tried to cover as much as possible in a reasonable amount of time. Let m…
  • In my experience FEP sticks reasonably well  to PDMS without adhesive.  The FEP I have is from FlexVat because they sell the Dupont FEP in smaller quantities (to get it straight from a supplier requires an order of several hundred dollars).  Its ver…
  • Some more videos will be coming out in the next couple of weeks... as a precursor though, I've learned a number of things, some of them the hard way haha.  Just remember, if you're going to refurbish the PDMS for a vat, don't use silicone sealant an…
  • Yeah not a problem.... if anyone that hasn't done the UV pass filter mod yet and ordered the filter you could measure the light distribution using an unmodified projection and again with a modified projector to see if the light distribution profile …
  • @Andrew_3Dfacture , it really doesn't take long.  I have a video up showing the start to finish step by step process of measuring the light output, creating and applying the mask.  I will say that the improvement in print quality isn't super drastic…
  • @Andrew_3Dfacture , When I reduced the cross member diameter to 0.25mm it failed to print.  My suspicion is that the cross members were too long to be free standing at such a small diameter.  I will try and scale the entire object by 50% to half the…
  • Thanks Ron, I've been very satisfied.  I think you're right about stacking the filters though.  Probably would get some really weird refraction properties. Here are some picks of some of the torture testing I've been doing on resolution printing.  T…
  • Finally got the video finished for the UV pass filter installation. https://youtu.be/rN1oRhMveNc I couldn't be more satisfied with the way this turned out.  My cure times are now 16sec as opposed to the 11sec I was getting without any filters for t…
  • Honestly I think the DMD chips resilience to UV light will be the most limiting factor.  The DMD chips that TI designs for UV applications are in the $3000-$4000 range.  And all the ones for visible light state in the data sheets that
  • Decided against the Peltier unit for the moment and shopped around for a UV pass filter to try and get all the superfluous wavelengths attenuated.  I found what looks like a perfect fit for our applications and it was less than $25.  It should get h…
  • The exhaust air from the printer is very warm and the projector body stays pretty cool.  I may add a peltier element to the printer body to make sure the internals stay cool.  I have been using Autodesk Magenta Resin and originally had to use a cure…
  • Yeah I had read that this modification takes the life of your projector into your own hands as well.  At cure times 1/3 normal, even if the life of the projector is cut in half it's still a net gain.  I added the extra cooling fans specifically to c…
  • Well I modified my projector again.  And this time I was able to decrease me resin cure times down to 1/3 of what they were originally.  I did this by removing the UV filter from the front of the halogen lamp assembly.  It turned out pretty good.   …
  • So I am working on a procedure to empirically determine the light output from your projector by basically seeing at what exposure time it fails to cure resin.  I think that should provide a pretty good amount of data to work with.  The whole point o…
  • Actually as bad as this sounds I actually haven't had the time to get a mask done for my printer.  Now that the software is finished my next step is to do the Lamp UV filter removal mod and then make a grayscale mask for my printer.  I basically wan…
  • already thought of that. I coated the separating tool quite heavily in polyurethane so that shouldn't be an issue. The special tool isn't necessary but comes in handy when it's a part with a large raft.
  • Here are some photos from my build platform mod -Gravelle
  • I've got another video up, some of the build plate separation issues that @nicolas mentioned in another thread are addressed here.  I emphasize that even though I didn't need that many tools to do this it took quite a bit of patience to make it happ…
  • Does anyone know if there is a source for the Serial Port commands to change brightness, contrast and gamma on the any of the projectors we use.  It occurred to me yesterday that instead of physically blocking UV light you might be able to digitally…
  • The MSDS that ships with the autodesk resin states that the resin is a class 2A Eye Irritant, class 2 skin irritant, class 2 chronic aquatic hazard and a class 1B Reproductive hazard.  The last one caught my eye and I'm glad you brought this up Ron …
  • Sounds like you have essentially used a raft on your print.  Have you included the support raft that creation workshop generates in your prints?  I recently perforated my build platform and have gotten better build platform adhesion since doing so.
  • Nothing special just rinsed in IPA and then in water, cured under UV lamp for about 10 min.  I have noticed that this resin is very heavily pigmented.  If I had more clear resin I'd probably try mixing it 50/50.
  • Working with the Autodesk Magenta resin.  Here are some pictures of a test rook printed with my own homemade flex vat.  The Magenta resin takes quite a bit longer to cure (30s vs 7-10s with the clear resin),  The prints turn out very nicely though!!…
  • As promised I have completed my video review of the Autodesk Clear Resin and have it posted to my Youtube Channel.  Let me know what you guys think of the review.  I have the Autodesk Magenta resin in the mail and should be here sometime early next …
  • Yeah I tried that modification, works great ;) -Gravelle Isn't that your video? :D I was curious if anyone would catch on to my own trumpet blowing.  It's nice to know my content is making its rounds on the internet. -Gravelle
  • Yeah I tried that modification, works great ;) -Gravelle
  • Thanks, haven't been able to work on the program much lately but it is on my to do list.  I've got a few other projects a little further ahead in the que but I'll get to it haha. -Gravelle
  • I have a couple of different paints I use and I usually use at least two different paints just to make sure I have the entire surface coated.  Primarily I use MG chemicals spray conductive paints, the two I've been using have been the carbon and nic…