CNC G Code G17, G18, and G19
Circular milling operations (such as G02 and G03) must be aligned on a plane defined by two axes of motion. This plane is selected by calling one of these functions.
- G17 aligns the arc plane with the X and Y axes.
- G18 aligns the arc plane with the X and Z axes.
- G19 aligns the arc plane with the Y and Z axes.
Plane selection is modal, and is often programmed in the program header.
See also: Haas Manual
Thanks for this info! Was trying to figure out some stuff for a CNC script I was working on – this (and another of your articles) seemed to explain things well.
Need help in milling an arc using G17 G18 G19. The ARC is: width 1″, height .75, Radius .54167, length 2.12939, angle 225. I want to start the arc at x1 y2. I would like to know how to use the numbers in a g2 command. All numbers are in inches.