Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 344)

Coordinate Control
Chapter 11
11-28
Example 11.12
Rotating the Work Coordinate System with G52
Main Program Subprogram 1000
G17 G90 G00 Z0 X0; G01 Z45. X15. F500.;
G00 G90 Z40 X45.; Z65.;
M98 P1000 L4; Z70. X45.;
M30; G68 Z55. X60. R90.;
M99 ;
Figure 11.17
Results of Example 11.12
Center of
rotation after G52
Initial center
of rotation
Cut during
second
execution
of sub-
program
Cut during
first
execution
of sub-
program
Cut during
fourth
execution
of sub-
program
Cut during
third
execution
of sub-
program
+
+
(55, 60)
(55, 60)
(70, 45)
(65, 15) (45, 15)
(40, 45)
12019-I
The external part rotation feature simulates a rotation of the machine
coordinate system. Since all work coordinate systems are referenced from
the machine coordinate system, rotating it would effectively rotate all work
coordinate systems. However, software overtravels, programmable zone
limits, homing, and positioning in the machine coordinate system are not
affected.
When external part rotation is activated all work coordinate systems are
rotated together by a specified amount about a specified point.
11.6.2
External Part Rotation