Re: rotary hand encoder wheels with detent

Sorry, I forgot...
Every real CNC machine with a jog control wheel let's you control the
increment of the wheel. Usually it's .0001/.001/.01 Some have .1 but
not many because the travels would move too fast. This is
accomplished either via a multi-position switch on the panel, or via
software which works something like this...

<physical jog increment button pushed>
Display reads...

1. Jog .0001
2. Jog .001
3. Jog .01

(push 1, 2, or 3)

<exit via physical jog increment button pushed>

--- In CAD_CAM_EDM_DRO@y..., "imserv1" <imserv@v...> wrote:
> --- In CAD_CAM_EDM_DRO@y..., "tedinoue" <ted@s...> wrote:
>
> > First, I'm confused by the need for a 1:1 correspondance between
> knob
> > detents and the typical 100thou per rotation. While certainly
> > convenient, it seems part of the utility of a computer controlled
> > system is the ability to scale controls on the fly.
> >
>
> The movement per rotation need not be 100 of something, but should
be
> at least an even 10. as in 1.0, .1, .01. The divisions should be
> usable increments like .1, .01, .001, etc.
>
>
> The points that I was making about the pulse generators were:
>
> 1) This is needed to improve utility of many(even most) CNC
machines.
>
> I posted pictures so that others could understand what I was
talking
> about. Many on the list have never seen a commercial controller to
> understand just how rich a feature set is considered standard, or
> even minimum on a commercial machine.
>
> 2) A pulse generating wheel is missing from most hobby class
> machines. None of the presently available hobby class controllers
> offer a good solution(good being *very* inexpensive). At least if
> they do, no one mentioned it during the discussion. I hope that
any
> CNC controller developers who monitor the list get the message.
>
> 3) What would be a good way to mechanically configure this kind of
> device in a hobby package? Price being the primary design criteria.
>
> Since no acceptable software interface presently exists for the
> device, it may be moot to discuss the device design, even though
many
> on the list like that topic. ;-)
>
> My personal inclination would be to make a great big, shiny,
aluminum
> knob with a steel backing plate with dimples drilled to match a
Vlier
> pin.(this as opposed to grabbing a stepper motor to simulate the
> detents). I can make one of these and slap it in a small box.
Then
> I would like to use something like Dan's dro quadrature board to
> process the signals from a simple rotary encoder on the knob's
> shaft. OK now where do I send the signal? What software will keep
> track of itself if I use this knob? I've got a device for less
than
> $150, but no place to hook it up.
>
> Here's the list of controller software that I know of:
>
> http://www.imsrv.com/controllers.html
>
> Which ones can directly use the signal from my pulse wheel?
>
>
> Best Regards, Fred Smith- IMService
>
> Listserve Special discounts and offers are at:
> http://www.vectorcam.com/cced2.html