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find application datasheet of L297 AND L298 stepperdrivers for 4-wire bidirectional steering. Elektor also made a very good pcb in 1999...I use 'em for all my steppers (combination of L297 & L6203)

synrad has a utility program named lasercutting, which can determine what power laser you might need.
try it, it's a nice prg!

www.synrad.com

mmm, i still got a 0.75Kw inverter along with a 3 phase motor.
with connections for RUN/STOP/BRAKE/EXT-POTM.
Maybe there's a possibility to connect a controller of some kind and use that as a sort...

i just downloaded a great program which can determine what power to use for which material!
co2 laser only....
mail me if you want a copy!

looks amazing! must be done to make a multi-color system... as soon as i have finished my own cnc, this might be the next project....

http://www.laserresale.com

http://www.parallax-tech.com

http://www.altair.org/CO2laser.html

http://www.lynxmotion.com/Category.aspx?CategoryID=27

well, after a good night of sleep i would use myself a co2 laser for cutting/welding (needs 2 types of optic heads); for perfect small holes you would need a pulsed laser. But a co2 could probably...

for alu you have to watch out! absorbsion level is different from steel...
you can destroy your laser with it....
for steel and stainless 1KW-2KW might do the trick; co2 is more affordable than...

depends what you'd like to cut; steel, or plastics?
cw-laser with a nd:yag rod is quite expensive (DON'T look for ruby rods!) look for it on ebay...
i think for hobby you can best use a co2 laser;...

Hi!
Just came home from a course at Trumpf-laser in Schramberg, Germany.
Learned a lot from these people about lasers; if i can assist in ANY way choosing a laser to build yourself don't hesitate...