Spindle Speed Hyuang Spindle

The Hyaunang (SP?) spindle can be brought up to speed by the onefinityh controller. It displays target speed and true speed.

I get a prompt that states “Press go when spindle is up to speed”.

Is there a GCODE I can use (and where) that says “when spindle is at speed, start cut”?

I don’t know of one. I use my ears.