Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 355)

Chapter 13
Coordinate Control
13-13
When changing work coordinates (G54-G59.3), the center of scaling is
transferred from the old work coordinate system to the new work
coordinate system. The offset distance from the tool position in the old
work coordinate system to the tool position in the new work coordinate
system is not scaled.
Scaling is applied to G52 and G92 offsets. The center of scaling shifts
when the work coordinate systems are shifted by a G92 offset or by
changing coordinate offset values. When using a G52 offset, the center
of scaling is adjusted to the new local coordinate systems.
Scaling is not applied to these offsets:
- external
- tool wear
- tool geometry
- tool radius
- tool length
Scaling is not applied to blocks containing:
- dwells (G04)
- data setting codes (G10., G10.1)
- macro calls (G56, G66, G66.1)
In the case of macro calls, the data passed via local parameters is not
scaled unless the data is used inside of the macro for motion.
G22, programmable zone 2 check on and data setting, is not scaled.
G53, absolute positions moves, is not scaled.
Rotary axes cannot be scaled.
In circular mode, the scale factors for the axes of the active plane have
to be the same. The control generates an error if the scale factors of the
axes are not equal.
Scaling is applied to these fixed cycles as shown below. The axis letters
may vary depending on how AMP is configured.
G31, G31.1 - G31.4
Gxx X__Z__
X (scaled)
Z (scaled)