Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 312)

Coordinate System Offsets
Chapter 11
11-6
Figure 11.4
Work Coordinate System Definition
Machine coordinate system
Machine home
G54 Work coordinate system
2
-3
-2
3
X X
Z
Z
In Figure 11.4, the machine coordinate system was defined by declaring
the fixed position machine home as the point X=-3., Z=-2. Then the G54
work coordinate system zero point was defined by the coordinates X=2,
Z=3 in the machine coordinate system.
Coordinate positions in a part program are manipulated as coordinate
values in the default work coordinate system, unless another coordinate
system is selected by programming G54-G59.3.
Figure 11.5
Examples of Work Coordinate System Definition
G55 G56
G57
G58
G54 G59
X X X
X
X X
Z Z
Z
Z
Z Z
X+3.3
Z-7.2
X+3.3
Z-3.1 X+3.5
Z+5.5
X-1.0
Z-6.1 X-1.0
Z+4.8
Machine coordinate system zero point
X+2.9
Z+.4