Re: EM: sparks

While on the subject of contacts, I have a question.

The contacts I'm using are the ones from PBR, tungsten and about 1/8"
diameter pad. Like you see on EOS switches normally.

On the few switches I've made, the two pads press together fairly
square; that is, the whole surface of one contact meets the full
surface of the other.

However, on something like a stack of three switches, where the top
one is farthest from the actuator lever, and pushed up by a nylon
lifter, it is difficult to get that "full contact".

Here's a pic of the stack:

http://home.roadrunner.com/~martin/pin/IMG_2867sm.JPG

Basically, on that top switch, just one edge of the bottom pad reaches
up and touches the top pad.

http://home.roadrunner.com/~martin/pin/switch-contacts.jpg

That sketch is exaggerated a bit, but it illustrates what I'm talking
about.

Is this a cardinal sin of switch-making, or can I leave it that way?
I tried many times to adjust it so that it hit more squarely but it
tends to end up with a gap that is too close. So close that just the
vibrations from the mechanism can set it off.

Fred
.

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