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Linear Motion Idea

Posted: 27 Jan 2013, 19:44
by jck57
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.

Re: Linear Motion Idea

Posted: 11 Jul 2013, 20:16
by jck57
Concept mockup for linear actuator using hobby servo. Poor man's rack and pinion.


Re: Linear Motion Idea

Posted: 15 Jul 2013, 23:34
by jck57
Working prototype.
IMG_1454.JPG
IMG_1454.JPG (94.64 KiB) Viewed 8018 times
IMG_1455.JPG
IMG_1455.JPG (102.77 KiB) Viewed 8018 times

Re: Linear Motion Idea

Posted: 17 Jul 2013, 00:50
by daniel_reetz
My gods, that is a thing of beauty

Re: Linear Motion Idea

Posted: 19 Jul 2013, 10:04
by jck57
Thanks, Dan. Starting to like acrylic for making stuff. Quick swipe with the random orbital sander made the cloudy finish.

Re: Linear Motion Idea

Posted: 27 Jul 2013, 17:13
by jck57
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?


Re: Linear Motion Idea

Posted: 03 Aug 2013, 13:52
by jck57
Some smart guy suggested polycarbonate and it works great.