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It fully depends on material you want to cut. But general rule is: the more - the better. :) For 3mm wood 100W CO2 should be enough.


Shure you can.


Of cource you must make desicions WHAT...

http://www.thermark.com/ will help you.

Beam expanders/reducers DO NOT focus beam when properly adjusted. They just make it's diameter bigger/smaller. If they are not properly adjusted, then beam divergence or "focus" somewhere.
As I...

May be you meant a "Depth of Focus"?
But this is optics. If you increase beam diameter, you decrease spot size and depth of focus, and vise-versa.
May I ask you, why you decided you need a beam...

Beam expanders/reducers DO NOT focus beam when properly adjusted. They just make it's diameter bigger/smaller. If they are not properly adjusted, then beam divergence or "focus" somewhere.
As I...