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

Original ~600pg/hr, very portable scanner now achieving ~900pg-1100pg/hr

Built a scanner? Started to build a scanner? Record your progress here. Doesn't need to be a whole scanner - triggers and other parts are fine. Commercial scanners are fine too.
User avatar
Mohib
Posts: 98
Joined: 05 Apr 2014, 21:15
Number of books owned: 0
Country: Canada

Re: Original ~600pg/hr, very portable scanner now achieving ~900pg-1100pg/hr

Post by Mohib » 06 Sep 2019, 18:43

Those of you who have followed the evolution of my scanner may recall the original version, before I started using a smart-phone camera, used Daniel Reetz' bike bike brake idea to trigger the shutter of the small point-and-shoot camera I used.

The hardware needed to fasten the shutter trigger mechanism to the camera (below) was rather ugly, heavy and custom built for the camera, although could handle very slight variations in the camera size. It worked but was far from ideal.
original-shutter-trigger-hardware-1.jpg
original-shutter-trigger-hardware-1
A couple of years ago I needed to use a better camera (better than the Olympus point-and-shoot and an iPhone I was using) for an old book I needed to scan. I have a Sony RX 100 (first model) but it doesn't have an electronic shutter release option so I started to think about a more flexible and adaptable design of the bike brake shutter trigger hardware. Something that would work on virtually any small camera without modification.

One day I hit on the idea of using the smart-phone tripod adapter (I was using when scanning with a smart-phone) to hold small point-and-shoot cameras instead of using the camera's built in tripod socket. This was a major break-through as the hardware could now be made virtually independent of the camera's size as well as avoid balance problems if the camera's tripod socket was off to one side (as it is in the Olympus, and which caused the camera to flop down under it's own weight unless everything was very tight).

I've been meaning to post what I came up with for a long time but never got around to it. The new assembly, attached to both the Olympus and Sony, is shown in the pictures below.

The only down-side is that the smart-phone tripod adapter does block part of the screen, although it's usually not a real problem as you can usually shuffle it bit this way or that so it so it's not blocking anything important before scanning.

The parts (from ebay but also available at local bike, camera and hardware stores)

- Qty 2 --1/4"Male to 1/4"Female Socket Screw Adapter For Tripod Camera Stand
https://www.ebay.ca/itm/20mm-1-4-Male-t ... SwCJxZ56Jn

- Qty 1 -- 5mm M5 Sidepull Caliper Brake Cable Anchor Bolt Set
https://www.ebay.ca/itm/5mm-Sidepull-Ca ... OSwwrFdJO8~

- Qty 1 -- 5mm M5 Steel Leveling Knurled Thumb Metric Nut
https://www.ebay.ca/itm/M2-M6-Steel-Lev ... w-7jgNhebA

- Qty 1 -- Vastar Universal Smartphone Tripod Adapter
https://www.amazon.com/Vastar-Universal ... 01L3B5PBI/

- Qty 1 -- 1/4-20 bolt, 1/4" long

- Qty 1 -- 1/4" Rubber End Cap
https://www.servocity.com/0-250-1-4-rubber-end-cap

- Qty 2 -- plastic coated wire clothes hangers (preferably one with a heavier gauge wire)

- various washers as needed (see pictures)

The yellow wire clothes hanger is heavier than the white so it stays rigid while the white one flexes to trip the shutter when the bike brake leaver is pulled.

The white wire clothes hanger is pinched together (so it grips the rubber encased bolt that presses the shutter trigger) and then the "1/4 Male to 1/4 Female Socket Screw Adapter" is tightened to hold it pinched.

The key to this set up is the smart-phone tripod adapter which has 2 tripod attachment points. One on the back, where the ball and socket tripod head attaches to and fastens the camera to the scanner post. And a second on the "top" to which the white wire clothes hanger is attached to.

If your camera has a hot-shoe on the top, you can might be able to do away with the smart-phone tripod adapter and use this to hold the white wire clothes hanger (and so the screen on the back of the camera won't be blocked):
https://www.ebay.ca/itm/1-4-3-8-New-Bla ... fMY3RsPRkg

The key to the flexibility and adaptability comes from many aspects of the design, the main ones being:

a) The height of the camera is not too critical as the smart-phone tripod adapter can open up quite a bit and fit most small cameras used for scanning.

b) Almost any shutter trigger placement is ok because the white wire clothes hanger can be rotated to handle off centre triggers. The rotation can be a little extreme, so the bike brake cable can be quite skewed, as seen from the Sony camera, but it doesn't affect the operation.

c) The rubber encased bolt can be slid as needed to position it over the shutter trigger and also its depth can be adjusted so it rests snugly against the shutter release button.

In the pictures with the cameras, I have a 1/4" bolt attaching the yellow wire clothes hanger, but I have since replaced that with the second "1/4 Male to 1/4 Female Socket Screw Adapter". Similarly, the pictures show the 5mm M5 Sidepull Caliper Brake Cable Anchor Bolt holding the cable with a nut and I've since replaced that with the knurled knob. These two changes allow me to setup and fasten the entire assembly without any tools. Both changes can be seen in the first 2 pics of the assembly without the camera below (the barrel nut, in these 2 pics, between the yellow and white wires, just lets me keep all the parts together when I'm not using the trigger hardware).
image1 - 2 wire forms - side - 50%.jpg
image1 - 2 wire forms - side - 50%.jpg (50.28 KiB) Viewed 212 times
image2 - 2 wire forms - angle - 50%.jpg
image2 - 2 wire forms - angle - 50%.jpg (56.55 KiB) Viewed 212 times
DSC03669 - full view - 25%.jpg
DSC03669 - full view - 25%.jpg (373.66 KiB) Viewed 212 times
DSC03682 - +1 stop (PS) - bottom right, cable - 25%.jpg
DSC03682 - +1 stop (PS) - bottom right, cable - 25%.jpg (247.51 KiB) Viewed 212 times
DSC03621 - head on bubble - 25%.jpg
DSC03621 - head on bubble - 25%.jpg (316.87 KiB) Viewed 212 times
DSC03672 - bottom left - 25%.jpg
DSC03672 - bottom left - 25%.jpg (267.82 KiB) Viewed 212 times
DSC03679 - top - 25%.jpg
DSC03679 - top - 25%.jpg (285.06 KiB) Viewed 212 times
DSC03680 - left cable - +1.5 stop (PS) - 25%.jpg
DSC03680 - left cable - +1.5 stop (PS) - 25%.jpg (253.04 KiB) Viewed 212 times
DSC03676 - control - no book or platen - 25%.jpg
DSC03676 - control - no book or platen - 25%.jpg (324.93 KiB) Viewed 212 times
DSC03675 - control - book + platen - 25%.jpg
DSC03675 - control - book + platen - 25%.jpg (345.94 KiB) Viewed 212 times
P4240289 - full view - rotated - 25%.jpg
P4240289 - full view - rotated - 25%.jpg (328.32 KiB) Viewed 212 times
P4240276 - right side, cable - 25%.jpg
P4240276 - right side, cable - 25%.jpg (232.86 KiB) Viewed 212 times
P4240266 - bottom right, cable - 25%.jpg
P4240266 - bottom right, cable - 25%.jpg (342.48 KiB) Viewed 212 times
P4230225 - bottom from left - 25%.jpg
P4230225 - bottom from left - 25%.jpg (300.35 KiB) Viewed 212 times
P4230217 - top - 25%.jpg
P4230217 - top - 25%.jpg (311.95 KiB) Viewed 212 times
P4240286 - control (no book or platen) - 25%.jpg
P4240286 - control (no book or platen) - 25%.jpg (320.13 KiB) Viewed 212 times
P4240285 - control (with book + platen) - 25%.jpg
P4240285 - control (with book + platen) - 25%.jpg (306.17 KiB) Viewed 212 times

Post Reply