Re: rotary hand encoder wheels with detent

Hi Fred,

That sounds like a reasonable range for override. .01 and .001 OK, I'll
play around with those moves. I have a 25 cpr DigiKey encoder, with
detents. Doesn't feel anything line the fine 256 cpr encoder I am
playing with now. BUT, with 4X quadrature and a DRO chip, the numbers
would be useful. An earlier post commented that it's OK (even
desirable) to loose the steps when turning the knob fast, so that
movement stops when one stops turning the wheel. That would kill the
"absolute" operation of an encoder with a DRO chip, but I can see where
that might be wanted.

Best regards,

Alan KM6VV


imserv1 wrote:

>
> --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > How are feed overrides typically implemented?
> >
>
> My favorite is a detented dial with 0-150%, and stops at each 10%.
> On the AB8400 it applies to jog mode if on pulse wheel or jog button,
> and against programmed feed during program operation. They use the
> softkeys for axis selection and pulse resolution is set by the feed
> hold knob.
>
> > > Not a problem from the development or "play" viewpoint. I suspect
> > > that once you get it working and actually use it that you will
> only
> > > want the .002 and .001.
> > >
>
> That should have been ".010 and .001", slipped into mixed mode binary
> there for a moment. ;-)
>
> I looked at some of the encoders listed at Digikey. It looks like
> you can get detented 25, 50 or 100 pulse optical encoders for about
> $30-$50.
>
> Best Regards,
>
> Fred Smith
> IMService