Re: Van de Graaff /Pelletron (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 20 Jan 2004 20:30:45 +0100
From: Finn Hammer <f-h@xxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Van de Graaff /Pelletron (fwd)

I bought this belt last time the VDG discussion was intense:

http://habasit%20staff:wwotm@xxxxxxxxxxxx/newapps/proden.nsf/luProduct/FAB-5EQ?OpenDocument&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;login

It is not cheap, but is able to run at 100m/sec surface speed (I intend
to run it at 15m/sec. Being 8" (200mm) wide it should provide about 80µA
charging.

It is a good idea to contact a belt supplier, because it is then
possible to get a new belt.

Cheers, Finn Hammer


High Voltage list wrote:

> Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 19 Jan 2004 20:57:28 -0800
> From: Jim Lux <jimlux@xxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Van de Graaff /Pelletron (fwd)
>
>
>
>>---------- Forwarded message ----------
>>Date: Mon, 19 Jan 2004 14:32:10 -0500
>>From: Charles Brush <cfbrush@xxxxxxx>
>>To: High Voltage list <hvlist@xxxxxxxxxx>
>>Subject: Re: Van de Graaff /Pelletron (fwd)
>>
>>Hi everyone,
>>
>>Just to digress for a moment back to regular VDG belts, here is a
>>company that supplies belts for transport systems in factories and
>>such.  Materials available include things like PVC, polyester,
>>nitrile, urethane, monofilament, teflon, mylar, novitane, and they
>>also have transmission belts in leather, nylon, plied rubber,
>>oriented nylon.  What is best material for a standard pumped VDG
>>belt?  I imagine you could make quite a substantial VDG with a big
>>food transport conveyor belt  as the charge carrier:
>>
>>http://www.akronbelting.com/public/belting.cfm
>
>
> I spent some time rummaging through a local belting supplier catalog.  The
> trick is in finding something that is:
> a) Not stretchy (so the belt speed isn't limited by flapping)
> b) Good insulator (leaves out all the carbon loaded materials, which is
> quite a few)
> c) Doesn't degrade instantly with ozone (oops, no using latex dental dam)
> d) Can be fastened fairly easily in a belt (vulcanizing seems to be popular)
>
> I've heard of folks using that yellow caution tape or similar substances.
>
> You can also run dual or triple belts within or next to each other. Craggs
> and Meek has a fairly good description of the "art" of VDG construction.
>
>
>
>
>