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Old 08-04-2009, 09:39 PM
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DaveGee (Dave Gault)
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DaveGee is offline
 
Join Date: Aug 2006
Location: Blue Mountains, Australia
Posts: 232
Quote:
Originally Posted by kinetic View Post
I was wondering about a good clutch method for both the RA and DEC...
And keyways too! You machined the keyways as well!?
Hi Steve,

Yes a clutch is a must to prevent an accident stripping a tooth. Not a good look!

For the hard anodised set I had the wormwheel sandwiched between two clutch faces and thin cork placemat material as the friction material. A screwed collar applied the pressure. That set of drives now lives in the Netherlands.

The current setup has a friction roller as the final drive. see picture below. it will slip if some drongo (usually me) knocks the scope.

Yes, I broached the keyways on my lathe.
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