Re: Pre-Rev 7: How close can the wires be ? - Advice needed.

If the shield is captured in the connector backshell (mine happen to
be a d-shell) and this ties/grounds the shield to the controller
case, is this good enough?

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

> Ernie,
>
> Take the encoder shield back to ENC-, Run a wire from the motor

case

> back to the G320 POWER GROUND terminal.
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Grumpy933"

<grumpy933@c...>

> wrote:
> > Hi Mariss -
> > What recommendations do you have for shielding and wiring for

320's

> that are
> > pre-rev 7 and don't incorporate noise immunity circuitry?
> > Are there recommendations on your website, somewhere?
> > Shielding and bonding isn't properly addressed on some Servo
> Controller
> > chassis / P/S kits and provision isn't even made in the connector
> > configurations to pick up the shield drain wires and terminate /
> connect
> > them.
> > What symptoms should I look out for on a 3 in 1drill - mill -

lathe

> type of
> > installation, in terms of the effects of noise transients?
> > Thanks in advance,
> > // Ernie
> >
> > ----- Original Message -----
> > From: "Mariss Freimanis" <mariss92705@y...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Sunday, March 07, 2004 9:24 PM
> > Subject: [CAD_CAM_EDM_DRO] Re: How close can the wires be ? -
> Advice needed.
> >
> >
> > > 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
> > >
> > >
> > >
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