Re: Linear encoder and rotary motor servo

Thanks to Steve for his explanation of the difference between printer
and CNC applications. It was, in short, that a CNC beats on the
servo much harder than a printer does, making it misbehave.

Graham,
I had imagined a simple implementation of the hexapod, using belts
stretched along the 6 rods, sort of like a rack, with a film encoder
also stretched along the rod. or perhaps cable drive.

The same objections that Steve brought up of separate motor and
encoder in a CNC environment would apply here.
Perhaps the dual encoder arrangement he mentioned would work.

regards-
Elliot

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham
Stabler" <grezmos@...> wrote:

>
>
> Its obviously nice to have a direct measure of position but other

than

> it being nice what is the advantage for the hexapod example you

mention?

>
> Graham
>