On 15 Sep 2003 at 15:16, Vasile Surducan wrote:

> why opto and not a stepper in reversed way ? It's there, its cheap and
> it's easy to use with two comparators. More robust and clean than any
> homebrew optical encoder.
>
Easy to answer Vasile, the VCR shaft is 6mm, its silky smooth and has
a very good 'flywheel effect', also it  fits reliably on commonly
available Knobs. Stepper motors, and I am looking at this solution,
usually have a shaft of about 4mm and engineering/machining skills
would be needed to convert to a 6mm/0.25" control knob. I have
niether the skills or the equipment to manufacture such an adaptor.
Adequate answer?.
thanks for your, and other inputs so far.
I've just spent 4 UKP on matt Black paper and a white ( UV reflective
) art pen.. perhaps this will work..
atb Mike W

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