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

Linear Motion Idea

DIY Book Scanner Skunk Works. Share your crazy ideas and novel approaches. Home of the "3D structure of a book" thread.
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jck57
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Linear Motion Idea

Post by jck57 » 27 Jan 2013, 19:44

Linear motion idea:

If you take standard 1" extruded t -slot framing like 80/20 10 series and run a skate bearing in the slot, you get the bearing going in a few millimeters so the the chamfer of the bearing runs on the chamfer of the slot. Mount four skate bearing with the appropriate spacers and adjustment features and you have a linear motion carriage.

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jck57
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Re: Linear Motion Idea

Post by jck57 » 11 Jul 2013, 20:16

Concept mockup for linear actuator using hobby servo. Poor man's rack and pinion.


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jck57
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Re: Linear Motion Idea

Post by jck57 » 15 Jul 2013, 23:34

Working prototype.
IMG_1454.JPG
IMG_1454.JPG (94.64 KiB) Viewed 5572 times
IMG_1455.JPG
IMG_1455.JPG (102.77 KiB) Viewed 5572 times

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daniel_reetz
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E-book readers owned: Used to have a PRS-500
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Re: Linear Motion Idea

Post by daniel_reetz » 17 Jul 2013, 00:50

My gods, that is a thing of beauty

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jck57
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Re: Linear Motion Idea

Post by jck57 » 19 Jul 2013, 10:04

Thanks, Dan. Starting to like acrylic for making stuff. Quick swipe with the random orbital sander made the cloudy finish.

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jck57
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Re: Linear Motion Idea

Post by jck57 » 27 Jul 2013, 17:13

Instead of using a second servo like in the previous pics, this is a way to lift and drop the page lifter. I want the page lifter to stay out of the camera shot, then move 1" in until it is over the page corner, then drop, then extend 1 3/8" to push up the corner of the page, then lift so that the flipper can carry it over, then stay in the up position as it returns to the starting point. This mechanism will mount on the mini drawer glide. Not sure if 1/8" acrylic is the best material. I've busted a bunch of it. Anybody got ideas?


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jck57
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Re: Linear Motion Idea

Post by jck57 » 03 Aug 2013, 13:52

Some smart guy suggested polycarbonate and it works great.


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