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Re: [ATM] Flex Rocker Question



Just out of curiosity: what acuracy can you reach with this method?
If it is limited by the line width, i'd estimate it won't be under several
arc minutes.

/Arjan

> If you want a reliable solution, you're close with the strip linear
encoder
> , _in principle_ . Large observatory scopes use exactly such encoders,
there
> are several good suppliers and models . Renishaw has an optical tape
encoder
> with a reflective read head , Heidenhain and Sony both have precision
linear
> magnetic encoders . However, for a robust tape encoder expect to pay more
> than for a premium 20" mirror .

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