I've got a crazy idea to bounce off ya'all... Like a lot of you, I have a large collection of paper ship plans. Some are common, but quite a few are rare and out of print, or at least extremely hard to get in the US. I need to get these digitized so I don't lose them to fire/flood/etc, not to mention it would make it much easier to make 3D models out of them, but the local blueprint places won't scan them for me without permission from the companies that printed them (most of whom have been out of business for years, if not decades). Low-end large format scanners seem to start around $1500 and the price goes up steeply from there, so buying one of those will not be in my budget any time soon. The other problem I have with using large format scanners is that they can have issues with really long blueprints. I once had one 3' x 10' blueprint scanned when I lived in Texas, but they didn't feed it into the scanner correctly and it went in crooked enough to both jam the scanner and tear and crumple the blueprint. For a while I thought they were going to have to cut my blueprint off the spindle to get it free. That, thankfully, was a cheap and common blueprint, but its definitely the kind of thing I want to avoid with my rare/antique blueprints... Seems to me that if we hooked up a $99 - $200 handheld book scanner (that typically scans 11" wide by up to 3' long at a time, max) to a computer controlled X-Y table (don't really need a Z axis) we could make a large format blueprint scanner that could scan large blueprints in smaller sections, then use photo tools to stitch the sections together to get the full large format scan image. From what I've researched, many of the handheld book scanners have enough built-in memory to handle dozens of scans or more, so we could wait and download the individual section scans after the entire blueprint has been scanned. My largest blueprints are roughly 3.5' x 11' , so I'd need an X-Y table that is roughly 4' x 12'. The good news is that the handheld scanners are light, and there are practically no work forces to speak of (just the weight of the platform, the friction from the scanner on the surface and the forces from moving the platform itself), so the gantries don't have to be beefy at all. I know that having a 4' x 12' X-Y table sounds kind of crazy by itself, but my new house will have a large unfinished basement area (roughly 29' x 15'), and I have a large attic area (roughly 23.5' x 23.5') over my garage I could use for this, too. And I can easily make the table so it can fold up against a wall to take up less room when not in use. I might need some lexan or plexiglass cover pieces to lay over the blueprint to help keep it flat for scanning, but these can be very thin. The control software would need to be able to control moving the scanner to each section and performing the scans. The control software would also need to know to overlap the sections when scanning by some amount so the photo tools can stitch them together. It would be nice if the control software could be told the overall size of the blueprint as an input parameter so that it can minimize the scan time on smaller blueprints, but that's not strictly a requirement. Mind you, I have no experience with the handheld book scanners, so I don't know how well they scan or how finicky they are. But if they are reliable enough for this, I think one could build the entire scanner for about $500 - $600, including the cost of the handheld book scanner, if one used an Arduino or Raspberry Pi to drive the servo motor controller (perhaps a RAMPs or RAMBO board). So, am I totally crazy, or does this sound somewhat feasible?