Re: [CAD_CAM_EDM_DRO] Simple DRO new idea

Hi Shabbir,

That's not a ring magnet! More like a "slug" or round "bar" magnet. If
you're looking for a ring magnet, take apart (it's ok this time) a cheap
24 step (or more) stepper motor.

Alan KM6VV


"M. SHABBIR" wrote:

>
> hi
> u can find ring magnet in back of audio speaker.
>
> shabbir
>
> At 02:26 PM 9/2/01 -0600, you wrote:
> >Scott
> >I am working on a very simple dro using a special purpose Hall effect sensor
> >and a simple up down counter connected to a 8 digit led. It would work as
> >follows
> >a linear magnet strip or a ring magnet with alternating north and south
> >magnet passes in
> >front of the Hall effect sensor. This generates a pulse train to the counter
> >circuit.
> >The sensor as has a direction output that is updated first before the pulse
> >so no lost steps.
> >By using a timing belt and gearing the rotary motion of the ball screw or
> >lead screw can be
> >multiplied or divided based on the number of pulses of the ring magnet to
> >equal an accurate count.
> >I will be sharing what I find with the group as soon as I finish a
> >proto-type. I am currently looking for a ring magnet if anyone may know
> >where to find any or have some let me know.
> >Derek B.
> >
> >