Finally got around to making a start on the power-on calibration for the UV Imager.
The Flickr page for this video has a brief footnote about the workings of it, but the vid is fairly self explanatory.
The control circuitry for this is basically a Parallax Propeller microcontroller (which is incredibly awesome in itself) with a bunch of switches, an LCD panel and a pair of EasyDriver (v44) modules attached.
Once I've fine-tuned this start-up sequence I can begin to write the PC software that sends graphical commands to the Propeller that describe the bitmap image that is to be imprinted on the UV paper.