Laser Calibration Power vs Feedrate (For Marlin/Repetier/RepRap)

This is a gCode file that you can use in your Laser Engraver to test the effect of speed vs power. It will produce a Greyscale burn pattern that is 140 mm / 107 mm. You can use this test pattern to get an idea of how your engraver will affect different materials.

In the example I show here I used it to help me decide how fast I wanted the engraver to burn this image of a horse. I wanted the full range of blacks to light grey in the final result. So I burned this test pattern on the back o