Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 322)

Coordinate System Offsets
Chapter 11
11-6
Figure 11.5
Examples of Work Coordinate System Definition
G55 G56
G57
G58
G54 G59
Y Y
Y
Y
Y Y
X X
X
X
X X
Y+3.3
X-7.2
Y+3.3
X-3.1
Y+3.5
X+5.5
Y-1.0
X-6.1
Y-1.0
X+4.8
Machine coordinate
system zero point
Y+2.9
X+.4
To change work coordinate systems simply specify the G--code
corresponding to the desired work coordinate system in a program block.
Any axis motion commands in a block that contains a change from one
work coordinate system to another are executed in the work coordinate
system specified in that block.
Example 11.2
Changing Work Coordinate Systems
Program Block Comment
G54;
G00X20.Y20.; axis motion in the G54 work
coordinate system.
G55X10.Y10.; axis motion to the point
X10. Y10. in the G55 work
coordinate system.
X3.Y2.; axis Motion in the G55 work
coordinate system.