Can anyone tell me why my Trotec Speedy 360 would stop recognizing the different colors for engraving. If I send blue for a different speed, it recognizes it a black. I even ran the part that was black separate, then sent the blue by it self, turned the black off and it didn't recognize the blue to engrave, I had to turn the blue off and pretend it was black, then it engraved it.

Also, my "Z" axis is registering zero when focused on a sheet of metal.

HELP please, anyone?