> On Dec 2, 2015, at 10:50 AM, Rod Smallwood <rodsmallwoo...@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?
paul
