Re: [CAD_CAM_EDM_DRO] Re: motor cables connection

In a message dated 8/7/2003 3:06:56 PM Central Standard Time,
timg@... writes:

> 2 amps or so work just fine on 22 ga wire with runs of 5 - 6 ft.

No doubt! I was assuming 4 to 10 amps. I guess I hadn't really visualized
the quandary in my tiny, feeble mind sufficiently to enable a Vulcan answer.
Also, "5-6 feet" is shorter than "10 feet or more".

One thing I didn't discuss is CONNECTORS! For #23 motors, good "DIN
connectors" or "#126 gold-plated" connectors are adequate. I have used "Amphenol
connectors" with 1.5 mm. dia. pins for VERY large steppers, and, would you believe
it, Radio Shack 4-pin MICROPHONE connectors for bipolar #34 motors (those
have "fat" pins and are VERY sturdy!).

But tin-plated "stamped sheet-metal" (not "Machined, gold-plated") connectors
CAN be a source of much more resistance than a few feet of too-small copper
wire! One must consider and learn! It is easier and CHEAPER to use "good
stuff" at the outset than to encounter frustration that CAN be very hard to "see",
and end up spending much more $$ and time to "find that lousy pin that
doesn't contact well"!

Jan Rowland





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