Homebrew PCBs

Beam divergance would kill you.  THe beam will grow in size as it 
travels.  If it grows, the engery is displaced over a bigger area, 
and will need more time to 'cut'  Our lasers do have 'adaptive 
optics' a mirror that bends to control the beam's waist (and 
autofucus)  But to hold a beam's size for a few feet, itsn't 
practicle.
A waterjet has a better chance, but that still a prob.
How about a hot knife/wire?


--- In Homebrew_PCBs@yahoogroups.com, Dave King <KingDWS@S...> wrote:
> 
> I know this is really off topic for the group but have either one 
of you 
> tried to cut say
> through a few feet of styrofoam? Always been curious if a laser 
would work 
> in place
> of a hotwire saw.
> 
> Dave