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hi, any help with info on clutch designs would be really helpful.
My application is a simple, a timing pulley on a 20mm dia steel shaft.
How do I design a clutch to engage/disengage the pulley and thereby the motor drive?
is it usually done with two concentric shafts, with the worm gear on one, and the main ra or dec shaft on the other, with a slip clutch inbetween? if so, how is the clutch face moved toward the drive gear without disrupting the drive train?
i was thinking of using 24v electromagnetic clutches from printers, but i presume these couple the input to the output when the voltage is applied, else it will allow the driven shaft to rotate free. is there a clutch which does the reverse, so with no power, the input is coupled to the output, but when power is applied, the output is decoupled.
that way, i can conserve power by applying a voltage only when i need to move the scope assembly by hand, at othertimes it remains coupled to the drive train.
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