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Subject: Re: [Homebrew_PCBs] Drilling station interference

From: "Stefan Trethan" <stefan_trethan@...>
Date: 2005-06-22

On Wed, 22 Jun 2005 08:32:17 +0200, Robert Hedan
<robert.hedan@...> wrote:

>
> Here's what will 'take you off of the air':
> 1) Run your motor leads thru a 5-conductor shielded cable. 4 leads are
> for the motor connections, the 5th conductor goes to the motor case,
> the other end goes to the drive's power supply GND (term 1).
> Ground the shields to your control box 'single-point' ground location
> (usually the '-' terminal of your big filter cap). Leave the motor end
> of the shield unconnected.
> 2) Use an AC line filter (Corcomp or similar) on the 115 VAC going into
> your control box transformer.
> It'll then be as quiet as a baby. No, wait; that's not a good analogy...
>


If you use the 24V steppers and no chopper driver you probably will have
much less problems anyway.
I've pulled the shield from cables in the past, if you compress the mesh
together it gets rather wide and you can slip it onto existing cables, if
you can't find the right shielded one.

ST