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

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
> >
> >
> >
> > Addresses:
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