I'm writing gcode to follow a Spline/Curve along a path of X,Y points.

I notice however, that when I send the gcode to my laser machine, the laser head moves in a jerky fashion vs smoothly.

Is there some kind of known gcode method to plot along an X,Y path that results in a smooth laser head movement?

I'm using Grbl 0.9i so I don't have a lot of advanced gcode commands available to use.

Thanks...