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

Monson's Full Auto Scanner Build #5

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.
jancoj
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Re: Monson's Full Auto Scanner Build #5

Post by jancoj » 06 Dec 2013, 00:34

Jck57 - Design of your cradle looks pretty cool. Could you please send any drawings or detail info about dimesnions of individual components. I am planning to build the same cradle so I can avoid some mistakes. Thank you very much

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jck57
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Re: Monson's Full Auto Scanner Build #5

Post by jck57 » 07 Dec 2013, 11:01

These drawings show important dimensions.
cradledrawing.JPG
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divider arms.jpeg
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jancoj
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Re: Monson's Full Auto Scanner Build #5

Post by jancoj » 19 Dec 2013, 16:12

Thank you for drawings. I am working on that now...hopefully it will work right.

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daniel_reetz
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Re: Monson's Full Auto Scanner Build #5

Post by daniel_reetz » 07 Apr 2014, 22:48

Reviving this thread and connecting it with the original self-adjusting cradle thread... thinking a lot about cradles these days. And so incredibly impressed with the mechanical genius on display here.

dtic
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Re: Monson's Full Auto Scanner Build #5

Post by dtic » 19 Apr 2014, 21:00

Jck57, any news on your full auto work?

Another possible project that is smaller in scope but probably could be very useful is a "semi auto" platen liften. It would relieve the user of having to every cycle use muscle power to lift/lower the platen on Daniel's hackerspace scanner or some other scanner. The user would only manually turn the book pages and a motor would move the platen up/down when triggered by some sensor or button or timer.

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jck57
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Re: Monson's Full Auto Scanner Build #5

Post by jck57 » 20 Apr 2014, 17:26

Made a bigger cradle. Aluminum frame enlarged. Horizontal air slide remade with drawer glides. Drawer glides on the cradle aren't used with this scanner. Center roller is removable because some books' spines are too stiff for it.

As for semi-auto: I think a cordless drill with a spool in the chuck could make a winch for raising and lowering. DC gearmotors offer many options for forward/reverse, on/off, speed control.
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IMG_1554.JPG
removable spine roller
IMG_1554.JPG (124.45 KiB) Viewed 5463 times
IMG_1552.JPG
horizontal air cylinder under cradle
IMG_1552.JPG (116.24 KiB) Viewed 5463 times

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daniel_reetz
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Re: Monson's Full Auto Scanner Build #5

Post by daniel_reetz » 20 Apr 2014, 21:10

w h o a h

M@rtijn
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Re: Monson's Full Auto Scanner Build #5

Post by M@rtijn » 21 Apr 2014, 03:58

Jack congrats on a great design! Looking forward seeing it in action.

dtic
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Re: Monson's Full Auto Scanner Build #5

Post by dtic » 22 Apr 2014, 10:41

Wow!
jck57 wrote:As for semi-auto: I think a cordless drill with a spool in the chuck could make a winch for raising and lowering. DC gearmotors offer many options for forward/reverse, on/off, speed control.
I've done some tests using a cordless drill and some string to lift a platen. Works pretty well. For the David Landin scanner no winch is even needed I suspect. But for a scanner with a vertical moving platen something like that is needed. A rail of some sort would also be possible. I think this kind of setup would be easy to use: press a footpedal and the platen is raised. Release and the motor reverses and lowers the platen until it is down. A challenge is to make this motion both safe enough (no hands accidentally hit/cut by the platen) and quick enough compared to manual platen operation.

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jck57
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Re: Monson's Full Auto Scanner Build #5

Post by jck57 » 30 Apr 2014, 12:56

Those 80/20 linear bearings are expensive, so I made a cheap sliding t-slot with brake. Skate bearings, paper shims, plywood, carriage bolts, springs, hand-nut.
slide together.JPG
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slide apart.JPG
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close slide.JPG
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Thanks for the support.

dtic: If you would, start a new thread for semi-auto. I think we can come up with some good ideas.

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