Originally Posted by
JohnYayas
Galvos work within the entire +-5V range. Lasers only work within the 0+5V range. The output from these color channels on the sound card DAC is still +-5V but the software only sends values that keep it in the positive range. If the output is inverted, the software will essentially be driving the lasers only with negative signals. I don't know if this is your problem or not. But, since all of the channels are identical electronically, you should be able to easily compare and test. As a quick test, route your XY channels to your RG channels and display a test pattern. You should have laser output. If not, you have other issues that you need to resolve.