Re: plasma accuracy

--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
wrote:

> Oh ok, well that makes sense. moisture in the air being conductive.

Could one use an inert gas such as Co2 with better results than air
regarding tip failure? Argon would be better probably but much more
expensive.

>
> Ron

I'm not sure of the air volume, but you can solve the compressed air
moisture pretty easily. Albeit with some work.

A post compressor heat exchanger would help drop the compressed air
temperature somewhat.

A simple refrigerator with airline coiled inside would offer a
mechanical cooling of the air line.

The exit air of the refrigerator could then be used as the pre-
cooling side of the heat exchanger. Warming the air to the torch,
but using some of the colder refrigerated air to pre-cool the air
entering the refrigerator. This would reduce the load on the
refrigerator.

Putting a bucket of water in the frige and the coil in tht would add
a signifigant thermal mass also.

Just some ideas.

Dave