Re: Encoder Indexer Option

I spec'd out the US DIgital E3 and E6S ones. I think I might go with
the E3 ones.

It appears that they don't offer a differential option on any encoder
with a shaft larger than .394". I wonder why?

-Brady


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Polaraligned"
<polaraligned@o...> wrote:

>
> I don't know about the one you spec'd out. I did not look
> yours up. Diff encoders have an inverted output also for each

channel.

>
> Check this out.
>
> http://www.rutex.com/home/index
>
> Go to bottom of page and download whole pdf document.
>
> It is a great source of info on setting up a servo system
> using rutex hardware. It gives lots of encoder interfacing
> info. Using diff encoders may save a headache. So if the
> cost is small, which it should be, why not use them?
>
> Scott
>
>
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "braidmeister"
> <braidmeister@y...> wrote:
> >
> > So what id the difference between a differential encoder and the

one

> > that I spec'd out? How does that relate to quaruture?
> >
> > -Brady
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Polaraligned"
> > <polaraligned@o...> wrote:
> > >
> > > Rutex drives, which I think you said you are using, do not

support

> > > an index. They do take differential output encoders which are
> > > more reliable, especially in noisy environments and with longer
> > cable
> > > runs. I would look into the diff encoders and get them if at

all

> > > possible. Rutex even makes a board, the R516, to convert a

single

> > > ended encoder to differential output. It is pretty well

documented

> > > that the #1 problem with servo drives not working right stems

from

> > > the encoder feedback.
> > >
> > > Scott
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "braidmeister"
> > > <braidmeister@y...> wrote:
> > > >
> > > > I've been trying to nail down an encoder for my BOSS

conversion.

> > Are
> > > > there any situations where I would need a 3rd or Index

channel?

> > > >
> > > > -Brady