Laser 40w positioned vgertical

Dear all,
I would like to know if any of you thought like me to mount the 40W laser tube stuck in a vertical position. That because I don’t like all those quickdraws with mirrors.
It is certainly a silly idea and therefore I accept all criticism. However, I would like to ask you the problem.
The material to be cut (large model aircraft ribs) would rest on the sliding Y axis while the X axis for having small dimensions should be a rotating axis.
What I’m asking is if there is a Grbl file that can convert the X axis to a rotation values .
I hope I have explained my problem
Thanks to all of you