Re: [CAD_CAM_EDM_DRO] Re: Encoders - API??? (possibly of interest only to programmers)
Posted by
Alan Marconett KM6VV
on 2001-04-05 21:38:53 UTC
Hi,
Two threads in one! a new API for DRO's, encoder connections on the
joystick port, and a "find" of a cheap single channel encoder, and how
to give it some "direction". The U.S. Digital encoder is also quite
cheap, an alternative to "fixing" the single channel one! Hope we
didn't confuse/loose too many people!
OK, so it's MORE then two threads in one!
Alan KM6VV
Hugh Prescott wrote:
Two threads in one! a new API for DRO's, encoder connections on the
joystick port, and a "find" of a cheap single channel encoder, and how
to give it some "direction". The U.S. Digital encoder is also quite
cheap, an alternative to "fixing" the single channel one! Hope we
didn't confuse/loose too many people!
OK, so it's MORE then two threads in one!
Alan KM6VV
Hugh Prescott wrote:
>
> I must have missed something, I thought the thread was about encoders for
> jogging an axis.
>
> Would not think you would need 500 line for that.
>
> Hugh
> Possabily terminally confused today
>
> ----- Original Message -----
> From: <mariss92705@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, April 05, 2001 12:28 PM
> Subject: [CAD_CAM_EDM_DRO] Re: Encoders - API??? (possibly of interest only
> to programmers)
>
> > Hi,
> >
> > Or you can go to the US Digital website and purchase a 500 line
> > (2,000 counts per rev) quadrature modular encoder for $39 single
> > quantity.
> >
> > Mariss
> >
> > --- In CAD_CAM_EDM_DRO@y..., "Hugh Prescott" <hugh@r...> wrote:
> > > Unless I am missing something how about using a cheap rotary
> > encoder such as
> > > Grayholl, CTS, Panasonic make.
> > >
> > > Optical 32 cpr for $20.54 with a .250 shaft standard Quadature
> > output.
> > > Requires 5VDC
> > >
> > > DigiKey part num GH6102-ND Grayhill part 61C11-01-08-2
> > >
> > > Several manufactures are listed in the latest Digi-Key catalog or
> > visit
> > > www.didikey.com
> > >
> > > Hugh
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: Ray <rehenry@u...>
> > > To: <CAD_CAM_EDM_DRO@y...>
> > > Sent: Thursday, April 05, 2001 9:08 AM
> > > Subject: [CAD_CAM_EDM_DRO] Re: Re: Encoders - API??? (possibly of
> > interest
> > > only to programmers)
> > >
> > >
> > > >
> > > > From: Alan Marconett KM6VV <KM6VV@a...>
> > > > Subject: Re: Encoders - API??? (possibly of interest only to
> > programmers)
> > > >
> > > > Hi,
> > > >
> > > > <s>but if you are implementing a counter in the PIC, then the PIC
> > would
> > > > >have to know which direction too! I guess you could run a line
> > from the
> > > > >direction line going to each driver (step/dir).
> > > >
> > > > You could stack two pulse generators for each axis with outputs
> > offset for
> > > > quad but the hardware to do this may offset the cost advantage.
> > > >
> > > > Ray