There are also subroutines to prep the printer/bins for the first page and to input the number and thickness of layers. I also have a countdown displayed so I know how many layers are left.
It’s probably not the most elegant solution (It certainly isn’t the most compact), as it requires at least 2 computers and monitors. But as I said earlier, I was already familiar with CNC and didn’t want to learn how to build and program a PIC. Also, I already had the old computer and monitor (are you sensing a theme?).
At this point I had not yet installed the bins. I placed a stack of paper under the printer and tested the repeat registration by printing multiple copies of the windows teat page. The printer returned reliably to the same starting position and the multiple prints all lined up perfectly.
Next up, the powder bins.