Formlabs has done some work to try and keep the optics clean… I had two massive spills, one from debris from a failed print sloshing resin out of the tray- and one from the pinch valve not closing and it just dispensing the whole cartridge into the tray AS it printed… Really fun when the little spout moves out from under the pinch valve on peel and fills up the catchtray under there…
In both of my spills the existing top catchtray, and under cartridge catchtray managed to prevent the spill from getting into the optics… of greater concern was that the top catchtray has a very small reservoir in the front left corner that can hold SOME resin- but not enough to contain an entire cartridge.
If IT had overflowed, then resin would have spilled into the electronics bay and god knows where else… but both times I was amazed how well the existing design funneled spilled resin away from the optical window and optics bay.
I figured it would have taken a failure in the tank floor to get resin actually on the optics window.
I don’t see any reason why the top catchtray can’t simply funnel resin either all the way thru to bottom of the printer where we could all have a shallow but sizable vacuum formed catchbasin… just in case.
Or even funnel the spilled resin back into a small, removable tray that can be slid out and will hold the maximum amount of resin the system COULD spill ( i,e, One full cartridge plus one tank’s worth of resin )
If I ever have to take mine apart again to clean up a spill… I am thinking about either fabricating a tray, or drilling a hole and installing a tube to drain the top catchtray out the bottom of the printer.