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| mini-lathe leadscrew clutch? |
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| MetalMuncher:
Hi DennisS, I have a couple ideas if the sleeve tends to wander, but now that I have the little channel doing its constraint job, the detent style that first comes to mind would be a little curved piece of spring steel mounted in the "valley" of the channel, oriented in the path of the sleeve's ring, so it has to slightly compress the spring to get past it. Or I could accomplish the same goal by mounting a pair of small bearing balls in the line of travel, (one for each position against the channel edges) drilled in from the back side, with something springy behind them, so that they just rise above the flat valley on the front of the channel. Much like how a typical ratchet wrench retains a socket. Perhaps a layer of rubber, inlaid behind the channel, to compress against each ball? The whole thing is only about 0.140" thick, so I am limited to what I can do in that regard. Or the option for a fork lever would still work. But I like the clean simplicity of how it works now. Hmm. I made that channel 5/8" wide. I wonder if a piece of broken tape rule, mounted convex outward, in the channel would do the trick? I could screw each end of it and leave the center section free to compress. |
| DennisS:
Hi MetalMuncher, I really like the idea of a piece of a metal tape acting as a two-way detent, that would really be minimalist engineering solution if you could make it work. With the limited depth you'd probably have difficulty implementing the sprung bearing idea, though that could be done on a selector fork rather than on the sleeve. Dennis |
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