Paul Koning paulkoning at comcast.net
Wed Dec 2 09:54:24 CST 2015

> On Dec 2, 2015, at 10:50 AM, Rod Smallwood <rodsmallwood52 at btinternet.com> wrote:
> Thanks Jay
>            Yes there's an optical encoder on the other end of the motor.
> Depending on the pressure of the roller on the cassette drive wheel it will deform more or less.
> That effectivley changes the diameter and hence the speed. So you need to set it.

Actually, it's the circumference that matters, not the diameter.  Does the circumference of a rubber roll change significantly when  you press on it?


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