Quote:
Originally Posted by MrB
The definition of a servo motor is a motor with positional feedback. This is more often than not an optical encoder.
If the motor has an encoder with as few as 50 lines/slits and a quadrature encoder it would be equivalent to a 200 steps/rev stepper, tho steppers are usually micro-stepped.
Probably plenty accurate for the sort of focal lengths used on these.
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oops! that's what i get for making posts in a rush at the end of a very long day. thanks for picking up the obvious and rather embarrassing error
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Phil