Owner's manual

Coordinate System Offsets
Chapter 11
11-9
Figure 11.7
Results of Example 11.3
Tool position
G54 Work coordinate system
after changing table value
Machine coordinate system zero point
20 30 40 50
G54 Work
coordinate system
X
Y
Y
Y
X
X
15
25
1525
20
30
40
50
The external offset allows all work coordinate system zero points to be
shifted simultaneously, relative to the machine coordinate system. This
offset can compensate for part positioning shifts that result when a
different tool is installed. It can also compensate for tool position shifts
that result from a different tool fixture.
The external offset can also be used to match the work coordinate systems
on mechanically different machines. The machines can then use the same
part program with the same G54-G59.3 coordinate values. This allows
part programs t o be less machine dependant.
Four methods are available t o modify the external offset:
Method: ActiveImmediately
after block execution
Activenext Cycle Stop Active next re-home or
power cycle
Programming a G10 X
SysteminstallerPAL offset X
Manually throughtable X
Paramacro Programming X
11.3
Work Coordinate System
ExternalOffset