I've heard of early ESD problems with slots around the coin mechanism
that was causing pay-outs. (Making ESD a bigger winner on slots than I
have ever been). Incidentally, all metal enclosure don't insure ESD
protection. I had problems with a piece of industrial control equipment
that was metal enclosed but bonding between certain sections was a
combination of gold alodine (sp?) or small gauge twisted pairs. The
grounding/bonding paths were not what the designer had anticipated and
we had a little work to straighten it out. (Basically, widened the
bonding straps with beryllium copper, replacing the small gauge wire
straps). Turns out it made an easier assembly process because the halves
were "self connecting" with a single clip-on section, rather than
stripping, crimping and installing the previous straps.
Gary McInturff
-----Original Message-----
From: [email protected] [SMTP:[email protected]]
Sent: Tuesday, July 07, 1998 4:22 PM
To: [email protected]
Subject: Re: odd immunity problems ?
--- On Tue, 7 Jul 1998 17:00:24 EDT [email protected] wrote:
> Lisa:
>
> Come to think of it, I have never seen a slot machine that
wasn't encased in
> metal. Wonder if they use EMI gaskets?.....
>
> Mike Conn
> Owner/Principal Consultant
> Mikon Consulting
Considering that the slots have survived Nevada humidity
conditions, it would appear that they have a high inherent ESD immunity.
But I don't understand the reasoning behind this thread.
Compliance engineers, conditioned by countless exposures to
hyper-optimistic design claims, usually develop of wicked streak of
cynicism.
Why would any of us ever expect to upset a slot ---- in our
favor?
And, to morph further, did the Japanese ever have a problem with
customers rigging those old mechanical Pachinko machines with a
hand-held magnet? Those were steel balls, and the glass was only 1/8"
thick!
Or would that have been an unthinkable breach of arcade
etiquette?
--------------------------
Ed Price
[email protected]
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA. USA
619-505-2780
Date: 07/07/98
Time: 15:22:28
--------------------------
