DIY Book Scanner

Is there a copy of the original image (full-res before any processing applied) somewhere that I can download? I have an idea of what's happening but I'd like to have a look at the original raw data first.

I'd be worried about someone just pulling at the pieces and moving them out of alignment. There's your unintended axial force! I think jck47's idea has a lot of merit. Ah yes, the dreaded "user" that does things you never intended. I should know better from my work as a software engineer....

Since we're all posting drawings, this is what I was referring to earlier. If you're going to use a single bearing, it should be on the outside of the two arms to offer the most support of an radial load. In the drawing below the two bearings are captured by the through bolt, however if the fit of t...

jck47, I must be missing something. Won't the shoulder bolt that goes through the center keep the bearing in each arm from popping out? [edit] I can see why you'd need this. If the bearing isn't a tight fit in the arm, the arm could move off the bearing and rub against the other arm. I think you'll ...

Dan, if you can register the sheet that accurately, then you might be able to get away with cutting the backside counterbores on the sheet, flipping it, then cutting the front side counter bores and individual pieces from the sheet. No fixture tom-jiggery involved.

There's an advantage of cutting the pocket (whether it's for inserting the entire arm, or just a hole for a c'bore "stub") on the sheet at the same time that you're going to insert the part and cut the backside counter bore - registration. How difficult is it to put a sheet down and get th...

Most likely, it will be best to tile them and cut, say, twenty parts per sheet rather than one scanner per sheet.

What does this mean for the fixture area of the sheet where the backside counter bores are made?

Isn't a page being in focus more important for reliable OCR than barrel distortion? Can't barrel distortion be mitigated in a post-process prior to OCR?

Hi dpc, could you share the technical details by a schema or photo of your solenoid setup? What kind of solenoids do you use?

See the link in the third post made to this thread.

I must be missing something, Rob. I don't understand what consumer camera ergonomics have to do with this. I have two cameras mounted to the scanner frame that are triggered by solenoids. They are connected through relays to a single momentary push button switch that takes less effort to press than ...