Step 51: Camera Support: Overview.
It's important to have a good support system for your cameras. In both of my book scanners, I've had a good way to support them, but both my methods don't generalize well. So I'll show you how I did mine and then propose a method that anybody could do with more basic materials.
My first book scanner was built from a Polaroid MP-4 camera stand. It has arms extending out, and I attached the cameras to them. Basically, I just drilled a large hole in a scrap slab of HDPE and then added an angle bracket to mount the camera. These aren't the best because they only work for my particular scanner. Regardless, I am including them here for posterity.