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

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@...>
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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