Origami Scanner- a folding book scanner
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- ceeann1
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Re: Origami Scanner- a folding book scanner
This is the compilation/ combination drawing of the updates to camera mounts and cradle. This was very fast and dirty.
I think it looks simplified. Much of the action is under the lower cradle plate.- ceeann1
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Re: Origami Scanner- a folding book scanner
I have been thinking of this assembly and I believe that 3 modifications will help. First I think that instead of a under-over folding cradle as I suggested earlier that a simple fold flat cradle may be the best option. I didn't like the space sacrifice an over under folder would require on one side being much smaller in depth than the other, nonsymetric, and somewhat cosmetically displeasing. The idea was prompted as a way of getting a bigger/wider cradle for special project like larger ledger style books. I am now suggesting that a sliding sleeve might be a way of getting the same result as specialized folding. I will post this as a drawing as soon as I have it ready. Second, the primary upright that holds the sliding mechanism of the platen seems to be a great place to put a counter weight or spring. All one needs is to make it hollow. A couple of thicker plywood sides and a couple of thin plywood pieces for the front and the back and a box beam is made that can hold the counter weight or spring. A pair of pullies in a tensioned threaded rod system like Daniel has used for bearings could be rigged at the top of the box. A line to the counter weight or spring would then take the weight off the platen assembly and keep the counter weight system from fouling when folded. Third a short piece of metal angle with a bearing on the inner surface would make a good mount for a "hover" plate to allow the cradle to move without adding side rails(several would be required on each side) ( I have earlier posted a drawing with side rails). The L would hold the cradle plate in place during folding and a single piece of plywood could serve as a platform/ base. This allows no cavities that might allow the cradle plate to act as a finger pincher. I will post the idea in drawing form as soon as possible.
Given these modifications I believe this aparatus has at least 3 modes that I can see. The primary mode would be as used in the forum for 2 page scanning. A secondary mode would be with the primary platen folded out of the way and the cradle extended with the sliding sleeves on the cradle being extended. This would hold a very large book like a ledger and this could be flattened with a single transparent piece for scanning one page at a time or an alternate larger manual platen to be pulled out of the way as needed. A third mode would be with the platen folded out of the way and one side of the cradle folded flat. The fixture could then be used as a large scale single camera scanner for larger scale documents or posters. The various permutations on these three seem pretty straight forward. These alternate modes would be slower and not often used exept for special projects but they offer more versitility to a fairly involved project.
Given these modifications I believe this aparatus has at least 3 modes that I can see. The primary mode would be as used in the forum for 2 page scanning. A secondary mode would be with the primary platen folded out of the way and the cradle extended with the sliding sleeves on the cradle being extended. This would hold a very large book like a ledger and this could be flattened with a single transparent piece for scanning one page at a time or an alternate larger manual platen to be pulled out of the way as needed. A third mode would be with the platen folded out of the way and one side of the cradle folded flat. The fixture could then be used as a large scale single camera scanner for larger scale documents or posters. The various permutations on these three seem pretty straight forward. These alternate modes would be slower and not often used exept for special projects but they offer more versitility to a fairly involved project.
- ceeann1
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Re: Origami Scanner- a folding book scanner
Here is the first concept redesign.
This is the plate hovering over a base with a fold flat cradle using lid supports for the uprights so the whole thing folds down under the cradle plate/top. The cradle and the plate are aluminum about 0.100" thick. The underlying base is a stress skin panel with appropriate hard points made of 1/8" plywood and 1/4" plywood for the outside edges. Stress skin panels are basically honeycomb made of plywood or wood. Really a series of box-beams all jointed together. Nothing really holds them together but glue and yet they can bear incredible weight. If you have ever seen a floating shelf with any dimension it was probably a stress skin panel.
This is the plate hovering over a base with a fold flat cradle using lid supports for the uprights so the whole thing folds down under the cradle plate/top. The cradle and the plate are aluminum about 0.100" thick. The underlying base is a stress skin panel with appropriate hard points made of 1/8" plywood and 1/4" plywood for the outside edges. Stress skin panels are basically honeycomb made of plywood or wood. Really a series of box-beams all jointed together. Nothing really holds them together but glue and yet they can bear incredible weight. If you have ever seen a floating shelf with any dimension it was probably a stress skin panel.
- ceeann1
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Re: Origami Scanner- a folding book scanner
The various sub assemblies are layed out here for show and tell...
The cradle has the base part where it is attached and then a sleeve that slides and locks to allow the cradle to be adjustable. It seems fairly straight forward from the drawings.
The angle aluminum with the bearing helps visualize how the cradle plate/top looks like it hovers or floats. These attached to the edge of the base will allow the cradle assembly to move and yet be restrained by the angle when folded.The cradle has the base part where it is attached and then a sleeve that slides and locks to allow the cradle to be adjustable. It seems fairly straight forward from the drawings.
- ceeann1
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Re: Origami Scanner- a folding book scanner
This is the upright that carries the platen. It has been modified to be hollow and have an internal counterweight or possibly a spring to help carry the weight of the platen.
- ceeann1
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Re: Origami Scanner- a folding book scanner
The inside of the upright might look something like this:
- ceeann1
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Re: Origami Scanner- a folding book scanner
The whole assembly would look something like this. Without the lights of course.
I intend to be able to scan at largest an encyclopedia and at smallest a paperback. It would appear that in order to maintain about 300 dpi that I will need a 14Mpixel set of cameras. I believe that will lead me to PTP style interfacing. I am looking into that and perhaps making a truely portable scanner. This scanner is portable the way osborne computers where luggable... This folds and is stowable but it would be a chore to take on vacation. I believe something like the Haiti scanner (5th gen by Daniel I believe) would work better for being smaller with a set up similar to the briefcase scanner by Nalfonso (Simple, Portable, Personal DIY book scanner) It looks like the addition of a set of springs might make that side rail type scanner easier to use and it seems to be a lighter set up.
Till I have time again.
Ceeann
Oops... missed the bearing angles... sorry. Just not gonna get drawn in here. Look at the drawings above and imagine them... Untill the shop is better set up this is about all I intend to do with this untill I add dimentions. I intend to be able to scan at largest an encyclopedia and at smallest a paperback. It would appear that in order to maintain about 300 dpi that I will need a 14Mpixel set of cameras. I believe that will lead me to PTP style interfacing. I am looking into that and perhaps making a truely portable scanner. This scanner is portable the way osborne computers where luggable... This folds and is stowable but it would be a chore to take on vacation. I believe something like the Haiti scanner (5th gen by Daniel I believe) would work better for being smaller with a set up similar to the briefcase scanner by Nalfonso (Simple, Portable, Personal DIY book scanner) It looks like the addition of a set of springs might make that side rail type scanner easier to use and it seems to be a lighter set up.
Till I have time again.
Ceeann
- daniel_reetz
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Re: Origami Scanner- a folding book scanner
Apparently this scanner can also fold in on itself:
http://bible.org/article/update-preserv ... -majuscule
http://bible.org/article/update-preserv ... -majuscule
- railman
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Re: Origami Scanner- a folding book scanner
Daniel,daniel_reetz wrote:Apparently this scanner can also fold in on itself:
http://bible.org/article/update-preserv ... -majuscule
Here's the pdf of this scanner in German, but it has some pictuers of it folded in it's case.
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- Beschreibung Traveller VS neu.pdf
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- daniel_reetz
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Re: Origami Scanner- a folding book scanner
Thanks, Railman.