Thanks for the interest and input Doug.
Much appreciated.
Rich Kraszewski
(920)969-6075
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Tuesday, December 18, 2012 3:29 PM
To: [log in to unmask]
Subject: Re: [TN] Source of ESD Mats Suitable for in-line wash baskets
So let it be written, so let it be done. Oh wait, different ruler, which
raises the question of which is greater, Pharoah or Emporer?
We have evaluated materials like this before. In one case it was a
silicone mat material, which was very good from a chemical durability
standpoint (a strongpoint of silicones) but it also made it an insulator,
so had poor ESD protection. In a second case, we evaluated a black
material that was advertised as static dissipative. After a few passes,
we found that you could rub it across a bench surface and see black skid
marks. If it was carbon impregnated, the matrix was breaking down. I
don't think it contaminated the sump, but not something we wanted to
chance.
Dave Adams, our cleaning equipment guru has found a material we like.
Rich, take a look at Stone Mountain Tools SPYDER Mat.. Dave says it has
gone through the wash a few hundred times, has good ESD characteristics,
and appears to be durable.
http://stonemountaintool.com/
I believe that Stone Mountain Tool will machine it to what you want.
Good luck.
Doug Pauls
From: "Stadem, Richard D." <[log in to unmask]>
To: <[log in to unmask]>
Date: 12/18/2012 03:06 PM
Subject: Re: [TN] Source of ESD Mats Suitable for in-line wash
baskets
Sent by: TechNet <[log in to unmask]>
Absolutely correct. The Emperor has decreed thou shall not defile the
sump.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Tuesday, December 18, 2012 1:05 PM
To: [log in to unmask]
Subject: Re: [TN] Source of ESD Mats Suitable for in-line wash baskets
I would strongly caution against something like this. You specifically
want something formulated to withstand the chemicals of water wash. This
also means that there is nothing that the mats contribute to the cleaning
sump. Think about how easy it is to contaminate a wash sump. Suddenly,
everything is contaminated.
Doug Pauls
From: Mike Sewell <[log in to unmask]>
To: <[log in to unmask]>
Date: 12/18/2012 12:53 PM
Subject: Re: [TN] Source of ESD Mats Suitable for in-line wash
baskets
Sent by: TechNet <[log in to unmask]>
You could try something like an open ESD floor mat, cut down to size. I'm
not sure how long the natural rubber would hold up to your wash process or
how much spray jet shadowing is tolerable.
http://www.wearwell.com/Static-Control/Conductive-Mats/Modular-WorkSafe-Light-ESD.html
Mike> Date: Tue, 18 Dec 2012 15:33:01 +0000
> From: [log in to unmask]
> Subject: [TN] Source of ESD Mats Suitable for in-line wash baskets
> To: [log in to unmask]
>
> Does anyone have a source for soft polymer ESD grid mats (similar to
screening but with ~ 1 inch openings) that would be suitable to go through
an inline wash system?
>
> The function of these mats would be to serve as a cushion to the
> bottom
side SMT components as they get shifted by the wash jets.
>
> Finding them ESD safe (safer/safe-ish ) is the challenge.
>
> Thanks in advance.
>
> Rich Kraszewski/PLEXUS
>
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