Date: Thu Feb 15 17:02:04 2007

Author: John Welch

Subject: Re: Van de Graaffs


What is the plastic sheet? polyethylene?

ichael Timmins wrote:

I'm about to replace mine with a teflon roller, I'll let you know how it goes.
I covered the upper roller with a plastic sheet material that charges
positive against the rubber belt. Just doing that made the dome charge
positively. The bottom roller is aluminum . I'm hoping the teflon will
improve performance.


On Thursday 15 February 2007 16:12, John Welch wrote:

Since my earlier post ended up without a subject, I'll try asking this

Has anyone tried replacing the cloth covered metal roller in the base of
a Winsco VDG and/or reversed the rollers to get a positive charged
ball? I'd like to try but it doesn't look trivial, so any tips would be