On Jan 26, 2014, at 3:53 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
In a similar
manner, I think that if a drive can be slightly modified so
that the hub clamp has a slight eccentricity (with respect to the
spindle), a pattern would result upon writing that centered around the
Sure, that;s essentaily the pattern on n analogue alignment disk.
I think machining the drive hub to give the rigth degree of sccentricity
would be non-trivial.
Not with a milling machine and a boring head. Or perhaps even a lathe with a 4-jaw chuck
and careful checking with a dial indicator.
paul