Laser is on, but not actually cutting
I built my Emblazer, have the G Code Sender software installed (OS X), focused the laser (smallest point I can get seems a bit bigger than the 1mm that other people mention). I've created a .nc file (simple circle to get going).
I then send the file to the Emblazer, the laser is on, it goes through the motions, but doesn't make so much as a mark on a piece of paper.
Have I missed something obvious?