On Wednesday, December 13, 2017 at 3:33:48 AM UTC-5, N_Cook wrote:
Like timing chains and toothed belts but for transfering positional info
rather than motive force plus timing.
So like the sprocket holes of Cine film or in this case more like the
central line of perforations in paper baudot tape. In this case thin
steel tape with central line of perforations, that engage with pulleys
with balls half set into drilled holes in the periphery of the pulleys,
same spacing, to engage with the holes ?

Stepper System? They can be with stepper motors, or cams and cogs, or microswitches and cogs.

Peter Wieck
Melrose Park, PA