UPDATE: Good news and bad news…
I contacted Formlabs and asked about sources for parts and procedures. Their immediate response was to email me 2 detailed pdfs on replacing the Peel motor and replacing the small mirror, and also ship me a replacement peel motor and small mirror – in their words, “on the house”. I didn’t even pay shipping!
I then proceeded to detail-strip the 1+ and clean out resin. There was tacky clear resin everywhere and it took 8-10 hours over several days to clean it out; there is actually still some in places I just couldn’t get to.
Remarkably, the mirrors cleaned up OK. The small mirror was completely coated with tacky clear resin; the large mirror was just very dusty. The company I work for used to do camera lens repair and although all those folks (and their expertise) are gone now, their tools and supplies are here so that gave me some confidence to attempt to salvage the small mirror. In the event it turns out to be bad after all, I have the replacement standing by. But it looks OK.
One of the things I did to clean up resin was to undo the 4 nuts capturing the springs in the resin tank holder in order to completely disassemble it and clean resin from between the two main parts of the holder. I took a photo to document how much thread was exposed so I could tighten the nuts back to their original level.
I think I must have overtightened them (causing the resin tank to be lower than it should be), because my first test print failed to adhere to the build platform. So I loosened them up and tried again. Now I have printed a raft and some rudimentary supports, however the part itself failed to materialize. Worse, the soft material in the bottom of the resin tank is damaged – there are gouges where the supports were printing.
I deduce from this that there are (at least!) two things wrong right now: First, I need to set the resin tank height much more carefully, and second, the exposure parameters are not correct for the resin I’m using.
I have a bottle of Anycubic gray resin, which obviously is not listed as an option in Preform :- ) but I’ve set up the OpenFL version and tried using the sample .ini file that it came with. Clearly (pun intended) this printer is able to expose the Anycubic resin, because it set up hard enough to damage the resin tank! So there should be some combination of settings to get a usable print from it.
I’ve put the printer aside for now; does anyone have advice on getting my resin tank properly lined up?