[757labs] Laser engraver moved!

[telmnstr at 757.org]

Got the laser engraver moving last night from EMC. The motors seem to do 
better with 12vdc than 5vdc. at 12vdc the controllers get warm but a small 
muffin fan seemed to keep them cool.

Lots of indepth configuration needs to be done in EMC, and fine tuning.

I talked to Harold this morning about how the laser works. We'll see if 
EMC can do it (pulse width modulation to fire the laser) or if we will 
need to build a small controller using an arduino or something.