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Need some help from the auto-rotating monitor experts...
DNA Dan:
Something like this http://www.vxb.com/page/bearings/PROD/Kit8299
or like this: http://www.robotmarketplace.com/products/0-HUB21225.html (This is probably what I am going to use.) I like the inset in wood approach because you will have a solid surface to which you can mount fiberboard for the monitor bezel to conceal the monitor/wood interface. I didn't do this with my first build and it was a real pain to glue a floating piece around the monitor's edge by itself.
Regarding the JRK board: You think if I used a chain and sprocket I could use this? There should be no slippage.
Centering: You should center the shaft based on the SCREEN. Don't center it by the weight distribution. When you rotate it, you want to have equal spacing in the bezel all around.
Le Chuck:
Good links, Dan, I like both of those better than the threaded floor flanges. Thanks :cheers:
DNA Dan:
I'm telling you, that robot marketplace has some really good products for the mechanicals. Check out the sprocket section. Lots of custom sizes. (I am in no way affiliated with them, just stoked I found them!)
TopJimmyCooks:
A well fitted drive shaft gear plus a motor shaft gear would be the best for positioning measurement. A tight chain would be second best but I think it would work. just build in an adjustable motor mount to set the chain tension. If the motor is say, 50 to 1 geared with the 64 pulse per motor shaft rotation, and you use the jrock board then you can register 3200 pulses per full rotation, that's stepper motor territory. should work fine, especially since pololu software can brake the motor at rest 100% like a servo.
kahlid74:
My stepper motor has an 8mm shaft, but I can't find any pulley's with that bore. Any of you have any ideas? 8mm is right about 5/16's but no one seems to have them for pulleys. I found gears for them, but no V-Belt pulleys.
Also, if I were to take a 1/2" bore what do you think would be a good way to "enlarge" the shaft on the motor from 5/16" to 1/2"? Are there metal collars somewhere I can use?
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