After running multiple machines for over 64 hours, I'm now fairly confident they should no longer lock up (outside of player interference).


See them in action! (Older versions, but you get the idea)
https://youtu.be/7snufCNmYCg
Electromagnetic Plant
Assembler
Upcycles whichever recipe you set. Actual recycling happens elsewhere. This simply controls the crafting.
- Can set quotas for each quality. This is done on the popup menu when placing the blueprint, along with the recipe. Can be changed later with the row of combinators dealing with quality. On the left for the assembler. Up top for the Electromagnetic Plant.
- In the combinators dealing with quality, delete all empty conditions. Wish the blueprint would do this automatically, oh well.
- In the requester chest you set the ingredients for the recipe. Must have AT LEAST enough to craft the item twice for the Electromagnetic Plant.
- The selector combinator controls in which order you want it to craft. Low quality to high? Other way around? Pick whichever you want.
- Toggle the constant combinator on-off when it stops. Should only really happen after player interference.
- Set the ingredient inserter stack size to something sane. No point putting a bunch of materials in just to have the outserter pull it back out after every craft.
- The big row of lights show which qualities are queued up for crafting. The green lights indicate at what stage the crafting is. One green light when its the first craft. Two green lights when its doing its second craft. This has to do with the EM plants' innate productivity bonus. This is also the reason why you should NOT use this for blue circuits since its productivity bonus changes based on research. The red light attempts to jump start the system every 5 seconds after idling.
- I recommend setting the Legendary quota to 0 for recipes that can use productivity modules for maximum efficiency. Just craft the legendary one elsewhere.
- Power outages can cause the system to lock up. Get your power management sorted!
** Can attempt to explain how it works if anybody is insane enough **