Re: Agilent Encoder Pull-up resistor

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

>
> afogassa wrote:
>
> >
> > Rutex new drives needs differential encoders if the distance from
> >pcb to the motor is over 1 foot or so, rutex has a pcb that
> >converters the signal from incremental encoders to differential it's
> >about 20Us$ or so.
> > After installing the converter don't use pullup resistors.
> >I'm using rutex drives and it's very good, little hard to tune it
> >with software, I like the old ones with pots to set it up.
> >
> >
> >
> Oh, wonderful! They must be doing something really "SPECIAL" in their
> drives
> to require this. I have several installations with 30 FEET of encoder
> cable that
> work perfectly with single-ended encoders. So, I'm glad I don't use
> Rutex drives.
>
> Jon
>

You should download their servo tuning instructions and then pretend
you are a normal home shop CNC person and see if it makes sense. Then
get the drives in a design where they don't provide the tuning pinouts
to the DB25 and the fun really increases. If you buy a drive from
Rutex it comes in "raw" and the defaults are not even close. My
customer had to send his Rutex back to the machine manufacturer to get
it "tuned" so it would work. Sometimes more complex is not better!