Re: [CAD_CAM_EDM_DRO] Shielded cable connections - help

In a message dated 24-May-02 19:23:19 Central Daylight Time,
ja_erickson@... writes:

> just have a simple question, i don't know where to hook up the
> shielding part of my shielded wires that go to my axis motor drivers
> and my axis motors? can anyone offer any experience or insight?
>

Some folks, even those "engineers" at the motor-factories, say to connect the
shield only at ONE end. Perhaps in some instances, this is wise. But I
protest it is the exception! I connect my motor-cable-shields both to that
little green screw on the back of (Superior Electric) motors, and to the
chassis of whatever driver. If the "electronics" are mounted "in plastic",
and there is NO voltage-differential between the motor (your machine-chassis)
and the (-) terminal of your motor power-supply, then connect the other end
there. Or, if using Gecko, the (-) terminal on it (Is that the first one? I
forget, and am too lazy to go look!). BUT, never use the shield to "conduct"
power!

Are you using that nice braided ("woven") copper shield type cable? Often,
when you strip and prepare the ends "professionally", the shield-end-lead is
kinda "fat". If you are deft at soldering after 40 years or more of DOING
it, you can solder a smaller short lead-wire around the properly-trimmed end
of the shield, being very, very careful not to melt the four "motor wires"
under the shield (that's why Teflon insulation was invented!).

Hope my ramblings are of use! Sorry I'm not eloquent at the moment! Jan
Rowland


[Non-text portions of this message have been removed]