Re: [CAD_CAM_EDM_DRO] shielding cable

I would be inclined to twist the motor cables and twist and shield the
signal cables. Twisting is a very effective method of reducing interference
and as I remember results in a 43db reduction when using a 1inch lay
compared with a 27db reduction when using a steel conduit screen. These
figures refer to magnetic interference.

Regards Peter

----- Original Message -----
From: "keongsan" <keongsan@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, September 07, 2002 4:11 AM
Subject: [CAD_CAM_EDM_DRO] shielding cable


> Hi,
>
> Previous posts advocate shielding of the motor and signal cables for
> the driver.
>
> For the screw-mount DIN connector, how does one connect the shield
> cable to the male DIN connector (the one permanently on the casing)?
> It doesn't have a provision for the connection of the shielding wire?
> I don't think one should connect the shield wire to the electronics
> end - eg, terminal 1 (motor earth) of the G201?
>
> Also, if one use multicore signal cable, the S&D terminals would be
> at some distance from one another. So a significant portion of the
> signal cable need to be exposed. Would this negate the advantages of
> shielding or would this be splitting hair?
>
> Thanks for the knowledge gleaned from this list.
>
> san
>
>
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