Archive: 5 posts

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Hi all, For my project I need something similar to a large wheel which can turn in 15 degree increments, with the user able to turn the wheel either left or right. I created the following system for turning the wheel one direction: http://i50.tinypic.com/hwhh7b.png ... which works fine. Each time the user actviates the flipper piston, the large wheel turns 15 degrees and stops instantly. To make it bidirectional, I made a smaller wheel with similar settings in the background that turns in the opposite direction. I then glued a wood cover to the small wheel, and bolted the large wheel to the wood cover. The intention was that if they hit one switch the large wheel moves clockwise, and if they hit a different switch the small wheel moves everything anti-clockwise. Unfortunately it doesn't work when connected together. The two motor bolts aren't stiff enough. When one of the switches is activated it slowly moves a small distance and wobbles. As I've written this post it has occured to me that I might be able to have just a single wheel hooked up to a three-way switch on directional, but then I'd need a system that can activate a three-way switch for precisely 0.1 seconds before resetting its position. Any ideas?

2010-07-06 03:08:00 Author: Tntnnbltn Posts: 10

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I've used double bolted incremental bolts numerous times and they have all worked perfectly. I think one of them used 12 increments which is very close to 15 so I don't see why you should be haing any problems. The only suggestion I can think of at the moments would be to alter the sizes of the wheels. You say you have another smaller wheel behind it. Try making both wheels exactly the same size. That seems to be the only different between your set up and mine. Personally I like to avoid 3-way switches if I can since if they're not exactly centre they'll move the bolt ever so slightly out of alignment. EDIT: Actually, this wooden cover is confusing me. Could you go into more detail about that? It seems unnecessary.

2010-07-06 03:15:00 Author: SR20DETDOG Posts: 2431

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I thought it wouldn't be happy with me sticking a bolt directly onto another bolt, so I glued something to the first circle for the second circle to connect to. Don't know if I ever actually tried connecting them directly. Making them both the same size worked though. Thanks.

2010-07-06 03:24:00 Author: Tntnnbltn Posts: 10

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I thought it wouldn't be happy with me sticking a bolt directly onto another bolt, so I glued something to the first circle for the second circle to connect to. Don't know if I ever actually tried connecting them directly. Making them both the same size worked though. Thanks. Wow I'm surprised that worked, glad it did though. As for the wooden cover, you don't need it, I've never used one.

2010-07-06 03:27:00 Author: SR20DETDOG Posts: 2431

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Yeah, just connected it directly. Awesome.

2010-07-06 03:29:00 Author: Tntnnbltn Posts: 10

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