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

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by jck57
25 Nov 2013, 11:21
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Re: Full Auto Brainstorming

A simpler way to do it: Get rid of everything but one torsion spring and the lifter arm. Use the servo to raise and lower the arm as well as apply variable down force. Sequence of ops: 1. Cameras fire. Lifter servo is up. Slide servo retracted away from page. 2. Slide Servo extends so lifter tip is ...
by jck57
24 Nov 2013, 15:52
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Re: Full Auto Brainstorming

Another page lifter gadget. The new gimmick here is a hobby servo to adjust downforce on the rubber tipped lifter. The goal is to have a microcontroller move the servo in response to inputs from a page checker which senses page thickness or light through the page or something else. If the lifter fai...
by jck57
04 Nov 2013, 16:31
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Re: Full Auto Brainstorming

dpc: In my own experiments even moderate vacuum on a page tended to pull on the page underneath. Interesting. Makes one wonder how that scanner I posted a link to is able to do it so well with vacuum? They claim that they can vary the vacuum based on the page detector sensor though. Maybe that help...
by jck57
31 Oct 2013, 09:43
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Re: Full Auto Brainstorming

Idea for a page lifter with automatically resettable downforce. The P/E transducer is a pneumatic pressure regulator that is controlled electrically so the Arduino can put more or less force on the rubber tipped page lifter. If the page fault detector sees more than one page, pressure is reduced by ...
by jck57
29 Oct 2013, 16:11
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Re: Full Auto Brainstorming

Daniel, if we're talking about going "full auto" then any human intervention is forbidden. It's an all or nothing contract. It's the sort of process that would take place inside a hypothetical "scan-it!" kiosk. A book goes into a slot and out comes a DVD with the scanned images/epub/pdf/etc.. Yeah,...
by jck57
27 Oct 2013, 12:12
Forum: R&D and New Technologies
Topic: Full Auto Brainstorming
Replies: 14
Views: 10935

Full Auto Brainstorming

Join the brainstorm. Comments welcome. The hardest part is to consistently pick a single page. This is because of the great variations in page quality, book size, and bindings. Any dependable machine must be equipped with page fault detectors to reject multiple pages and nil pages. A desirable featu...
by jck57
24 Oct 2013, 12:22
Forum: Scanners and Build Threads
Topic: Jck57's Full Auto Scanner Scheme #6
Replies: 82
Views: 34590

Re: Jck57's Full Auto Scanner Scheme #6

Good point, Dan. I really want to use the much more powerful gearmotor to raise and lower the wedges. Here's another idea: an electomagnetic clutch disengages the wedge rotation as the axial cam keeps turning to lower and raise the wedge. Ordered this Sharp copier clutch for $15 on ebay. We'll see i...
by jck57
24 Oct 2013, 08:51
Forum: Scanners and Build Threads
Topic: A new scanner design using plastic tubing
Replies: 224
Views: 102519

Re: A new scanner design using plastic tubing

Nice work, David.

Have you considered extending the horizonal pipes toward the operator and then joining them to a transverse pipe with two elbows to form a handle?
by jck57
23 Oct 2013, 22:12
Forum: Scanners and Build Threads
Topic: Master Index of All Scanner Builds.
Replies: 18
Views: 105930

Re: Master Index of All Scanner Builds.

Nice work, David. Have you considered extending the horizonal pipes toward the operator and then joining them to a transverse pipe with two elbows to form a handle?
by jck57
23 Oct 2013, 20:59
Forum: Scanners and Build Threads
Topic: Self-Adjusting Spine Support
Replies: 103
Views: 49165

Re: Self-Adjusting Spine Support

Based on a BGA kit. A single-handed option to adjust two clips for locking and deskewing small book covers. The clips move simultaneously over a threaded rod with one side right hand thread and the other left hand tread. The thread is placed through drilled holes on the sides and a routed slot on t...