Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Camera Mount Proposal

Everything camera related. Includes triggers, batteries, power supplies, flatbeds and sheet-feeding scanners, too.
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StevePoling
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Camera Mount Proposal

Post by StevePoling » 30 Dec 2009, 11:04

I've been working on my book scanner at a glacial pace. I've gotten the base and vertical support and lighting complete and I'm thinking about how I'll hold the two cameras in place. Last night at supper my wife reminded me of those rods and clamps we used in chemistry class and how adjustable those things were. This inspired the following U-shaped assembly:

1) take a 2x4 that's just over 2 foot long and drill holes near each end. This will be clamped horizontally to the vertical support.

2) run two threaded rods (just over 1 foot long) through the holes and secure them with nuts and washers. These will extend over the left and right sides of the base.

3) drill through two blocks of wood/HDPE to run each block through a threaded rod. These will be secured to the rod via nuts and washers.

4) attach an angle bracket to each block to complete the camera mount.

SOME issues weigh on my mind:

a) How long should that horizontal piece be? Should it be adjustable to be wider or narrower? Use something telescoping instead?

b) Can I rotate the blocks on their threaded rods while aiming each camera and then lock them to prevent further, undesired, rotation? Should I use a thumb screw pressing against the rod or two nuts holding the block in compression?

Please advise.

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daniel_reetz
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Re: Camera Mount Proposal

Post by daniel_reetz » 30 Dec 2009, 11:44

That's somewhat similar to the way the cameras were mounted on my first scanner. The copystand I used had some arms coming out the side, which have aluminum rods that extend forward like your threaded rod would extend forward. They normally hold some very lightweight lights, but I mounted the cameras there.

There were two issues. Unlike your idea, my setup was not very rigid. The cameras would droop a bit, causing some skew. It was possible to work around that. The other issue, again stemming from rigidity, was that the cameras would vibrate when I would set the platen down. Again, I think thick-ish threaded rod and a 2x4 should provide more than enough stability.

As for affixing the HDPE blocks, I vote compression from both sides with wingnuts. I had the problem that the set screw would cause the camera to shift when I tightened it, which was a PITA.

StevePoling
Posts: 290
Joined: 20 Jun 2009, 12:19
E-book readers owned: SONY PRS-505, Kindle DX
Number of books owned: 9999
Location: Grand Rapids, MI
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Re: Camera Mount Proposal

Post by StevePoling » 30 Dec 2009, 15:07

Vibration. Didn't think of that. Thanks. The wingnuts are a great idea.

I'm going to have to isolate the threaded rods from the platen...

Randomlaughter
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Re: Camera Mount Proposal

Post by Randomlaughter » 06 Jan 2010, 11:36

A pair of rods going back might alleviate many of these problems including vibration and rotation. (Assuming rotation isn't ever required.)

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