|The Remains of the vat|
Polycarbonate - aka - 'bulletproof glass' or 'Plexiglass' has fairly decent transmission properties. It does NOT transmit deep UV, but it looks like right around 390nm or so it starts.
|Spectral transmission for polycarbonate|
|Polycarbonate pane 155x155mm x ~5mm|
|Taking a picture of sheet of plastic is difficult at best...|
|The aluminum frame and walls all cleaned off, ready for a replacement|
I added in a generous amount on silicone sealant, and remounted the vat back on my machine. I was initially concerned that the plexi might block more UV light than the original, but after a few test prints, I was fairly convinced that there was no significant difference to the optical UV transmission for the lamp I was using.
|All back in working order|
I drilled 2 holes in the cap for the resin. The tube went through one hole in the cap, and the other hole is used for venting. I used a small fuel-line hose that I bought from an auto-parts store to extend the short hose of the pump. I also used a few short segments of brass tubing to connect the various hose lengths together, and to act as weights for the end of the hoses. I did a few tests with some water and a few glasses to verify that the pumping system was working properly. The flow rate was good, no leaks, everything looks like a go!
I mounted the peristaltic pump system in my printer. I used the word 'mounted' a little loosely here. It's actually just wired into the power supply and placed in the area that I want it. I did a few tests pump resin in and out of the vat and back into the bottle. It looks like everything is working well. Now I don't have to detach my vat to drain it, or use a syringe or funnel to get the resin back in resin container. In the next day or so, I'll probably FDM print a mount plate for the switch and pump and zip-tie a few cables.
The only thing I would change about this set-up is using BLACK tubing. I'm concerned about light curing leftover resin in the tube. Instead of changing everything, I may either spray-paint the tube, or wrap some tape around it to block out light.
|I can use the fill/drain tube to add/remove resin from the vat|
I would HIGHLY recommend getting a cheap peristaltic pump, a length of tubing and a switch to make your own system.