Re: How close can the wires be ? - Advice needed.

This is the first time I had heard to run a wire from the motor case
to the PS ground... Could this wire be the drain wire for the
shielding in the motor power cables? Or should this be a seperate
wire run outside the power and encoder cables? Am I OK if the
machine is attached to the controller case? In other words, check
continuity from the motor to the controller and see if there is
continuity?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
<mariss92705@y...> wrote:

> That shouldn't be a problem. Remember to run a ground wire from

motor

> case back to power supply ground.
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Michael Gamber"
> <mgamber@c...> wrote:
> > How long have the Rev7's been out? I have 3 320's that I

purchased

> > in Nov of 2002. I took the connectors off, but could not see any
> > marking to indicate the rev, so I assume that I have an older

rev.

> >
> > I have the encoder wire in a seperate shielded cable that is
> > grounded at the box end only. I will be running the motor wires

in

> a
> > seperately shielded cable, but want to run them together in a
> > plastic conduit to the servos. Do you think I will have any

issues

> > with this?
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
> > <mariss92705@y...> wrote:
> > > Couple of things.
> > >
> > > The encoder circuit goes into a squaring circuit (Schmidt
> trigger)
> > > followed by a 5uS low-pass filter, followed by another

squaring

> > > circuit. This makes the encoder inputs totally insensitive to
> > noise
> > > pulses narrower than 5uS.
> > >
> > > This has been tested with a 20' (3 meter) long cable having

the

> > motor
> > > leads and unsheilded encoder leads bundled together, just like
> you
> > > are not supposed to do. A scope couldn't even pick out the
> encoder
> > > signals yet the servo worked just fine.
> > >
> > > Second, the ERR/RES input was passivated so it would not

respond

> > > to "fault" inputs lasting less than 3 mS. The entire fault
> circuit
> > > was redesigned to do what it was supposed to do quickly
> internally
> > > (respond within 2uS to a short-circuit), yet not false-trigger

on

> > an
> > > external "fault" input such when another drive was forcing it
> into
> > > fault (the 3 mS part).
> > >
> > > The REV7 is easy to use and has no bad habits at all.
> > >
> > > Mariss
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Michael Gamber"
> > > <mgamber@c...> wrote:
> > > >
> > > > What is it in the rev 7 Gecko's that allows you to bundle

them

> > > > together?
> > > >
> > > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
> > > > <mariss92705@y...> wrote:
> > > > > If it is REV5 or later, remove the connector block. The

rev

> > > number
> > > > > will be silkscreened in white in the area covered by the
> > > connector
> > > > > block.
> > > > >
> > > > > Earlier versions have the rev number under the big blue

cap.

> > > > >
> > > > > Mariss
> > > > >
> > > > >
> > > > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Steven Ciciora"
> > > > > <sciciora@A...> wrote:
> > > > > > How do you tell which revision drive you have? Both for
> > > > stepper,
> > > > > and servo,
> > > > > > if you don't mind answering...
> > > > > >
> > > > > > Thanks!
> > > > > >
> > > > > > - Steven Ciciora
> > > > > >
> > > > > > >Jeff,
> > > > > > >
> > > > > > >If you shield is grounded at the drive end only and if

you

> > are
> > > > > using
> > > > > > >our G320 REV7 drives, feel free to bundle them in a

common

> > > > harness.
> > > > > > >
> > > > > > >Mariss