On Mon, 14 Mar 2005 12:40:12 +1100, "Phil Allison"
wrote:

"Iain M Churches"

"Phil Allison"

** The cutter head may need cooling - but Helium is not a good coolant.

The cutting stylus is in fact *heated* .

The cutting stylus is indeed heated. The cutter head coil is cooled
as required with helium. This is a fact which is well documented.

** How bizarre - cold air would do.

Helium has much higher heat capacity than air, and much lower mass. It
is an excellent (and inert) cooling medium, and is used in many
industrial processes.
--

Stewart Pinkerton | Music is Art - Audio is Engineering