Re: [CAD_CAM_EDM_DRO] Question on connector used on servos

In a message dated 4/5/2004 11:52:45 PM Central Standard Time,
mgamber@... writes:
The brushes have .187 quick connects. OK to use or is soldering necessary?<<
Not if you use fresh connectors, with adequate "spring" so that they have to
be PUSHED-on with some degree of force. (That is, if they just "slip on" with
ease, they are not sufficiently tight).
Also the encoder has .100 spacing pins that appear to be gold plated. Do you
recommend getting gold plated connectors to mate with them? I know that
encoder wiring should be as fail-safe as possible, but will gold plating buy me
anything here?<<
Yes, actually. Gold virtually refuses to corrode with all but man-made
corrosive liquids. However, if you put a TIN-plated jack on a gold-plated pin,
metallurgical reactions (metal-flow) will take place, and there will be soon
layers of strange Stannous-auric alloys between the pin-surfaces, and T'Paul is
still trying to quantify the deleterious effects upon signal integrity of that
substance.

High-quality sockets, pins, jacks, and such are NOT gold plated to make 'em
purty, but for a
REASON! And it DOES make a difference! It'd probably be better to put
mating TIN-plated parts together than to mix gold and tin, but I have not
personally researched that with 20-year trials. Anyone know?

Jan Rowland


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