Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 321)

Chapter 11
Coordinate Control
11-5
Figure 11.3
Work Coordinate System
Zero point on
the part drawing
Workpiece
Chuck
Workpiece
Zero point on the work
coordinate system
Wheel position at
machine coordinate zero point
Z Distance to be assigned
X Distance to be assigned
12016-I
There are 9 preset work coordinate systems selectable using G54 - G59.3.
You can select the required work coordinate system by specifying any of
these G codes in the program.
Work coordinate systems called out by G54 - G59.3 have zero points that
are entered in a work coordinate system table (see page 3-18). These zero
points are in the form of offset values from the machine coordinate system
zero point.
The control establishes the machine coordinate system immediately after it
completes the machine home operation. The default work coordinate
system, determined in AMP by your system installer, is activated
simultaneously. The default work coordinate system is activated upon
execution of a control reset operation, G92.1, or power-up. E-STOP reset
can also activate the default system if your system installer has AMPed the
control to perform a control reset at E-STOP reset.
The default work coordinate system is the sum of the external offset value
(if any) and the offsets of the default coordinate system selected in AMP
(G54-G59.3 or none). If the default coordinate system is selected in AMP
as “none,” the default work coordinate system is the same as the machine
coordinate system. This manual assumes G54 is the default coordinate
system and no external offset has been entered.