It's been way too long since I last dipped my toes into the messy and frustrating task of 3D printing. The cold winter months and a new job have simply prevented me really getting back into it.
As I'd got most of a bottle of resin that was going out of date in May, I figured I should get to printing something, indeed anything, just to use it up.
I'd got so many things that needed printing, and ideas for games and accessories. Some less important things seemed like a decent place to start, rather than for my big games like Epic. It wouldn't matter so much if the prints came out a bit crappy because of the expired resin or my dodgy settings.
My initial idea was to print the calibration model again, to test the resin and maybe set me up better going forward. Even though I used pretty much the same settings as when I last printed it, this time it got completely stuck to the build plate. In my efforts to scrape it off, several of the corners snapped due to brittleness.
It wasn't looking great if I couldn't even print the test print model correctly.

Here we go again

Well that went well
Still, rather than tweak settings and spend another couple of hours printing it again, I decided to just barrel straight into it. I set up a scene with 4 potential bases for some cars for Gaslands, a game I couldn't even play until I printed some parts for it, as well as a bunch of guns.
Unsurprisingly, this print again failed, with all 4 bases losing their supports in the same place, and ending up all warped. I clearly did not get it set up right in that area. What's worse, removing these prints was even harder than the calibration print, and the rafts just kept snapping. This was even after halving the bottom exposure time to 10 seconds.
I quickly learned that the trouble I was having during removal was due to temperature. I was simply waiting too long after a print was finished, and everything was cooling too much to easily remove. If I got there while the prints and plate were still warm, they would slide off of there with very little effort.
So, those first bases were a bust, but at least the guns looked usable.

What a success. Not.

Setting up some Gaslands stuff
During my next printing effort, I proved myself to be an enormous idiot. In my frustration and eagerness to get the next print going, I forgot to tighten up the build plate onto the z-axis arm, and when I went to check on it a couple of hours later, the clamp was hanging nearly half off and nothing had adhered to the build plate. So a good clean and tidy up was required before I could go again.
Eventually, I got a rhythm going, and managed several somewhat succesful prints. Then, because removing the supports was causing quite a lot of pitting, I reduced their size, causing a massive failure printing a tank turret, which I had to print again. That was a 5-hour print down the drain.
There was an additional problem where a lot of the things were slightly warping when they were curing. I even took to leaving the supports on during this phase to see if it would hold things straight a little bit better, but it had little effect.
I'm guessing some of these issues would be alleviated if I had a proper curing setup, as I have only cured in daylight so far. I'll have to sort something out for my next little printing marathon, whenever that may be.

Time for some replacement parts

Huzzah! An actual complete print.
Despite all of these issues, I've managed to get some prints that at least look somewhat usable. Sure, I've still got to remove some of them from their supports after they've cured, but whatever.
So there can be no real complaints as long as I've learned something and managed to get something out of that old resin bottle.
And the things I've learned are thus:
- Never use light supports, especially if using anti-aliasing.
- Don't be frugal with the alcohol - have to get that stuff really clean to prevent it going tacky.
- Remove the prints from the bed while everything is still warm.
- Don't rely on daylight to cure things properly or evenly.
There are so many other things I looked at printing over these last few weeks, but I often had to find other things to print instead.
Most of the things I looked at need editing in something like Blender. Either they need fixing, splitting, joining, or modifying in some other way.
And that will have to wait. Probably a very long time.

This stonking failure needed a total reprint

There must be something usable here