High speed paper handling equipment (think printers) use garland sort of 
Christmas tinsel that can be frequently replaced to solve this sort of 
problem.

John Ferrell  W8CCW

"A nation of sheep will beget a government of wolves."
-Edward R. Murrow
----- Original Message ----- 
From: "Sean Breheny" <shb7@cornell.edu>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Thursday, March 25, 2010 10:08 AM
Subject: [EE] ESD dissipative or conductive casters


> Hi all,
>
> We have a robotics application which puts fairly high reversing loads
> on caster wheels. We are looking for a source for heavy-duty casters
> which are either conductive or dissipative (we can deal with roughly
> anything from 0 ohms to 10^9 ohms from hub to floor) to counter some
> ESD generation problems that we have. So far, all we have been able to
> find are either very soft conductive casters which do not hold up very
> long under load, or semi-dissipative ones whose resistance is almost
> 10^11 ohms from hub to floor, which is too high for our application.
> Unfortunately, we seem to have found that most caster vendors, even
> those who make ESD casters, are not too knowledgeable about ESD and
> either don't understand why this is a problem for us or do not know
> how to fix it. Has anyone here ever dealt with this or know of a
> source for ESD casters?
>
> Thanks,
>
> Sean
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