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Ryan's Stowable Scanner Build Thread

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.
Ryan_phx
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Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

Okay, I finally got some pictures of the scanner. The USB trigger isn't shown, and my LEDs still haven't arrived, so the light rig isn't shown, either, but everything else is done. The only problem is that the cheap drawer slides on the platen aren't very good--I'm probably going to replace them with better ones.

So here's the scanner:
Image

In its stowed configuration:
Image

Here it is unpacked:
Image

Here's the case, with the rollers for the cradle base:
Image

Here's the scanner, completely assembled:
Image

A shot from above:
Image

A close-up of the camera mount:
Image

With the platen raised:
Image

In that last shot, you can also see the locking bolt on the right--that's the side that slides out to accommodate larger books.

And it fits under the bed:
Image
The total dimensions of the stowed unit are 17.5" x 25" x 6.5".

Now if that Chinese courier would just finish rowing that kayak across the Pacific, I could build the light rig...
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daniel_reetz
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Re: Ryan's Stowable Scanner Build Thread

Post by daniel_reetz »

That is *art*! Beautifully executed.

Hell, I could send you a couple of Crees just to get you going on things... you can mail me replacements whenever yours arrive.
Ryan_phx
Posts: 63
Joined: 29 Dec 2010, 14:51
E-book readers owned: Nook, Kindle DX
Number of books owned: 0
Country: USA
Location: Sandusky, OH

Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

daniel_reetz wrote:That is *art*! Beautifully executed.

Hell, I could send you a couple of Crees just to get you going on things... you can mail me replacements whenever yours arrive.
Thank you! It's actually a bit rougher in person than the pictures make it look. I had planned to add some other color to it, but I reached the point where I just wanted the thing to be done!

I appreciate the offer of the Crees, but I think I'll pass. Fact is, even if they were here now, it might be a couple of weeks before I have the chance to actually build the rig.
Ryan_phx
Posts: 63
Joined: 29 Dec 2010, 14:51
E-book readers owned: Nook, Kindle DX
Number of books owned: 0
Country: USA
Location: Sandusky, OH

Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

My USB trigger isn't working for some reason. I got tired of waiting for the LEDs to arrive, so I hooked up a halogen for some tests. I've got enough light, but the trigger isn't working right. I used this design, and everything is wired correctly. When I press the button, the cameras will focus, but I can't get them to actually take a picture. Well, one of them did once, but I can't replicate that. I've been pressing the button in different ways, on the theory that a press-and-short-delay-before-next-press might be interpreted by the camera differently than two rapid presses, but that doesn't seem to work, either. When I press the button, the screen goes black, and when it comes back, it simply shows the "live shot" with the "Auto" box in the middle, that retreats to the upper right corner. I'm running the latest CHDK build on both cameras, so I'm at a loss here. The only thing that might be an issue is the hub. I've always been a bit skeptical of the quality of this hub, so I might just grab a USB splitter this afternoon and see if that works better.

One other thing-the camera makes several little clicks when I press the trigger--is this normal?

If anyone has any ideas, I'd love to hear them.
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daniel_reetz
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Re: Ryan's Stowable Scanner Build Thread

Post by daniel_reetz »

What happens if you press the button twice? Does once "arm" the camera, and twice "fire" it?
steveo1544
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Re: Ryan's Stowable Scanner Build Thread

Post by steveo1544 »

I've noticed that if the camera has nothing to focus on the camera may not trigger as expected
Ryan_phx
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E-book readers owned: Nook, Kindle DX
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Country: USA
Location: Sandusky, OH

Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

daniel_reetz wrote:What happens if you press the button twice? Does once "arm" the camera, and twice "fire" it?
The first press makes the camera screen go blank, and I hear several faint clicks from it. A second immediate press doesn't seem to do anything. It never does actually capture an image.

When I get a chance, maybe I'll post a video of what it's doing. In the next few days, I'm going to pick up a USB splitter and try that instead of the hub.
Ryan_phx
Posts: 63
Joined: 29 Dec 2010, 14:51
E-book readers owned: Nook, Kindle DX
Number of books owned: 0
Country: USA
Location: Sandusky, OH

Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

steveo1544 wrote:I've noticed that if the camera has nothing to focus on the camera may not trigger as expected
When I was using it, it was mounted on the scanner with a book in the cradle, so it had a target.
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daniel_reetz
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Re: Ryan's Stowable Scanner Build Thread

Post by daniel_reetz »

I'm guessing that the hub is your issue. You should be able to test it by connecting a USB cable to the USB port of your computer, and then plugging that into the camera. If the camera fires, it's a problem with the hub. If the camera doesn't fire, or does the same thing it's currently doing, then the problem is probably not the hub.
Ryan_phx
Posts: 63
Joined: 29 Dec 2010, 14:51
E-book readers owned: Nook, Kindle DX
Number of books owned: 0
Country: USA
Location: Sandusky, OH

Re: Ryan's Stowable Scanner Build Thread

Post by Ryan_phx »

daniel_reetz wrote:I'm guessing that the hub is your issue. You should be able to test it by connecting a USB cable to the USB port of your computer, and then plugging that into the camera. If the camera fires, it's a problem with the hub. If the camera doesn't fire, or does the same thing it's currently doing, then the problem is probably not the hub.
My wife's computer has a hub on it, so I'm going to try it with that one. Here's hoping it's just a bad hub.
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