Re: rotary hand encoder wheels with detent

Hi Fred,

How about a 1, 2, 5 progression of jog increments? And what is a
Vlier? Some sort of spring loaded pin? I've mentioned Dan's DRO board,
and I've lately been thinking of milling 100 (or 50?) flats on a 1.625"
aluminum disk (parts from a floppy disk drive), and a small spring
loaded, roller tipped arm (like on a microswitch) to press against
disk. This, I suspect, will give a little detent action, and improve
the "feel" of my pendant. Actually, I just had a thought; a timing belt
pulley could serve as a detent wheel, if the "teeth" match!

Alan KM6VV


What's a

imserv1 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