Hi community, so i bought an used cnc with laser for engraving, I have no information on the product, but i tried testing laser first using lasergrbl software. I tried to print a small stencil pick (10x10cm) but on the white spots of the pic the laser won't turn off, its always on and burning, it has 3 connector pin, gnd, 12v, pwm, i turn the button on the laser on, and it starts burning the wood.
What am i doing wrong?
Thank you