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

How about making the jog step size push-button programmable; I.e., 1" per jog,
1/2", 1/4", 1/16", microstep. One detent click per the jog-wheel = that sized
movement.

Bill

On Wed Feb 13 14:40:40 2002, Alan Marconett KM6VV, <KM6VV@...> wrote:

>Hi Drew, Dan,
>
>The "stepper motor" jog knob would be incremental also, I believe. One
>would need an absolute encoder (with detents) if you wanted to "get
>back". *OR*, what about a "feedrate override" display, either LED or on
>the screen, that would allow you to get back? cheaper, wouldn't need
>expensive ABS encoder. But knob would not be graduated, just
>"relative", I think.
>
>If we use a "DRO" approach, then perhaps one could "zero" the knobs,
>THEN we'd know exactly where they were! (Zero the knob, and "reset" the
>encoder chips to zero).
>
>More thought required. I just ordered a DRO kit from Dan M., that is if
>PayPal took my "payment". An hour later, and I have no confirmation.
>Get anything Dan?
>
>Alan KM6VV
>
>
>Drew Rogge wrote:
>>
>> 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@...

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