Re: [CAD_CAM_EDM_DRO] What is wanted in a controller,

After reading Fred's explaination of how the "jog" knob on
his control works I'm pretty interested in that. Having the
tactil feedback would be nice. It kind of reminds me of how
the volume and channel knobs work on most car radios now. The
knob has something in it to provide the "clicks" as you turn
but the CPU in the radio is really just counting something like
quadurature inputs to know which way and how much you've turned.
I've also noticed that if you spin the knob too fast the radios
will usually miss some of the clicks.

On the feedrate knob I think it's important to be able to
set/reset the knob to the progammed feedrate. Same for spindle
speed override.

Drew

Alan Marconett KM6VV wrote:

>
> Hi Drew,
>
> Thanks for your thoughts! I think I see what you're talking about with
> the video tape jog knob. I have a high end Sony VCR with a knob that
> sounds like what you're describing. My remote probably didn't cost
> $200-300, but I get what you mean. This would be different then a
> "directly calibrated" jog wheel, which would be more like a manual
> machine. Two different approaches.
>
> The feedrate knob is one I (hobbyist) hadn't considered until these
> threads. I can see how it would be useful. That sounds more like an
> absolute shaft encoder. Or perhaps a pot and A/D.
>
> Spindle on/off, coolant on/off etc. buttons would be easily added to a
> pendent. After a few more devices, it makes sense to do it with a PIC,
> to minimize the "wires" between the pendent and the control panel, and
> read the various "analog" input devices.
>
> Alan KM6VV
>

--
Drew Rogge
drew@...