Definitive guide for Shapeoko?

I have a Shapeoko 3XXL and I just purchased a Jtech 7W laser kit for it. I haven’t installed the laser yet but before I do I’m trying to find a consistent description of GRBL settings that need to be changed.

From what I can tell I need:
G10 L2 P1 X-812 Y-812

Is that everything? And I think I need to reset when I use CNC so I would have:
G10 L2 P1 X0 Y0
Is this correct?

So it would make sense to have a “Use Laser” macro that does the first set and a “Use CNC” macro that would do the second set?

Please let me know if this should cover it.


The link I am providing is the definitive as it is produced by the nice folks over at JTech.

Scroll down until you see a section about setting up the macros for their detailed instructions.

That looks correct, yes. The setup is covered in detail on this page:

The first paragraph hits all the ones you’ve specified. Though the $30=255 setting can be pretty much anything as long as it matches the S-Value Max in the Device Settings. The controller and the software just have to agree on a number - it matters less what the number is.

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