Re: Accu-coder shaft encoder

tommym6@... wrote:

> From: tommym6@...
>
> I have a pair of Accucoder 220C shaft encoders.
> They call out 400 PPR and operate at 5V.
>
> Anyone know if they are useful in a precision
> machine tool application?

My guess is these are 100 Cycle/Rev encoders.
Counting all edges gives 400 counts/Rev. That is rather
low for a machine tool. With a .2" lead screw (5 TPI)
that would give 5 x 400 = 2000 counts/Inch, or .0005"
per count. That is fine for a DRO or a positioning system,
but a little coarse for a contouring system. If these
encoders are really 400 Cycles/Rev, that gives 1600Counts/rev,
or .000125", which is getting into the reasonable range.

Jon