Re: [CAD_CAM_EDM_DRO] Re: Encoder Indexer Option

Differential encoders have no effect on CPR. It is just a method of putting a signal on wires.

By using 2 wires for the signal you can assume that any signal on both lines is noise which makes filtering quite easy.


-----Original Message-----
From: braidmeister <braidmeister@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Mon Jan 31 11:39:15 2005
Subject: [CAD_CAM_EDM_DRO] Re: Encoder Indexer Option



3 Questions still floating out there:

1. Is there any reason why I would need an Index feature on the
encoder for the Bridgeport? Doesn't this have something to do with
threading/tapping? (I will be running Mach2...is this a moot point?)

2. If running sheilded lines less than 8 feet long, is there really
justification to go to a differential encoder? It seems to me that in
the case of US Digital, that it would be a PITA to convert a shaft-
type encoder to my motors...The ideal setup would be a hole-thru
design with a 5/8" encoder.

3. If I did select a differential encoder, is there any bearing on
the CPR rating? I mean, would there be a difference between a 1000
CPR non-diff and a 1000 CPR differential?

-Brady


--- In CAD_CAM_EDM_DRO@yahoogroups.com, Stephen Wille Padnos
<spadnos@s...> wrote:

> Polaraligned 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
> >
> >
> I think they changed their website around recently - there's no PDF
> linked at the bottom of the page :)
> You might want to put in the name of the file you were suggesting,

or a

> direct link to it.
>
> - Steve

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