advise options needed on laser upgrade/add on

[Robin Hewitt]

etching stone or cutting metals

I have heard rumours of people managing to cut steel paste mask stencils with 120 Watts but the surface had to be dulled down first. I have no idea about engraving stone. When I think "laser cutting metal", visions of enormous 2kW machines with oxygen assist spring to mind. Can you find someone who has done whatever it is you are trying to achieve and see what they are using?

[george uk]

Hi

after reading up last night, i will just concentrate on etching stone/othere items with a laser. I think i can achieve what cutting steel with a plasma torch add on easier.

I want to be able to etch pictures on stone like these 2
https://www.youtube.com/watch?v=i-HgWC7eurw
https://www.youtube.com/watch?v=GLDH5U_zY9A

am open to changing any design plans if required, i am trying to avoid having a different machine to laser engrave, and i can also add a Y mech just for the laser if i need to.

I also see this and though wow,
http://www.mycncuk.com/threads/7237-...-Spindle-Laser

and if diodes are good enough, i could use one of them instead. Like i say, i know FA about lasers so all opinions / ideas welcome. I want to end up being able to etch on as large a bit of stone as possible, i may purchase a smaller laser machine for smaller placks ( or if anyones selling )

In relation to cutting steel.( with whatevers required )

I was thinking that it may be a good side idea to supply pre cut and drilled/milled steal frame components for people wanting to build CNCs, Allowing them to bolt it together prior to wielding it. and marking out fixing points for them. Am fairely sure i can supply these cheep enough, with bolts, to make it economical for home builders wanting to do solid machines over 1mtr.

Any advise on being able to achieve the above would be welcome.

[george uk]

Found ths usfull, for a basic understanding of beem power/focus/distance

http://www.parallax-tech.com/faq.htm

will update when i work out were am placing the tube.