Hope this helps, feel free to ask more questions. Since then I have modified both to allow for better flexibility in my workflow and to interact better with the senders I am using, especially when I need to mix the milling with the laser. However I later found that Autodesk had a repository for the post processors and I grabbed the one on there that had been modified to drive a laser head. I started with the GRBL post processor indicated by Inventables, the makers of the X-Carve. What post processor are you using? One from the Post Library, one that you've modified yourself or one from another source? However for the circuit boards I use bCNC. I use CNCjs as the sender for the milling and laser jobs.

Are you using a G-code sender? If so, which one?.I also use the machine to mill circuit boards that require fine detail. Sometimes in my workflow I need to mix the two. The laser is useful for cutting templates on cardboard or paper and also to engrave or burn onto the materials listed above. I've used the machine to do milling and engravings in wood, MDF, plywood, aluminium, acrylic. It is outfitted with both a router cutting head as well as a low power (5W) laser head. What CNC machines are you driving and what kind of operations are you doing?.

I am happy to assist, here are my answers:

Fusion 360 grbl