Instructables

X-Y stage for film scanner

I'm building a film scanner using a dlsr.

Here's a picture of the rig so far:

Basically there's a light source, negative stage, negative holder, camera support stage, camera and lens.  I put a negative in the negative holder and slide it using a guide such that I can take a bunch of pictures of the negative at 1:1.  For example, it takes 25 pictures to cover a 6x7cm negative.  The individual files are then combined into one file using stitching software. 

The system works very well, but it's a bit tedious.  I'd like to automate the negative movement using a diy motorized xy stage.  Many of the designs I've seen are for much bigger units, such as for a cnc machine, or units that require speedy movement.  That's not the case here.  Each movement would be only 10-20mm.

I'm fairly handy, and I can follow directions/recipes well, but I haven't worked with arduinos or stepper motors before.  Any advice or suggestions on a good way to accomplish my goal would be very welcome!

Picture of X-Y stage for film scanner
caitlinsdad2 years ago
May I suggest you fabricate a jig/indexing system that is manually operated? It is easy to attach something to the side like a flat piece of pegboard that has a whole bunch of holes already in it. From there, just make some kind of arm from the camera to a pointer peg/pin to a hole in the pegboard. Move it around to mark your 25 positions on the board. Take you pictures systematically so you cover the entire 25 positions. Good luck.
pdesmidt (author)  caitlinsdad1 year ago
We've made a little progress. See: https://www.youtube.com/watch?v=MZ_OrwB90CM
pdesmidt (author) 2 years ago
It's a good suggestion, but I have that already. I make have indexing marks along the jig, the pieces of ABS black plastic. That works ok for medium format, but for 4x5 or 8x10 film, it gets pretty tedious.