Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 354)

Coordinate Control
Chapter 13
13-12
Important: If an axis is configured as a rotary axis, the scaling
magnification display screen displays dashes instead of numbers for that
axis. Rotary axes cannot be scaled.
The left column lists the current center of scaling for each axis.
When scaling is cancelled, the current center of scaling for each axis
is set to zero. The format of this value is determined by the word
format of the selected axis.
The middle column lists the currently active scaling magnification
value for each axis. When scaling is cancelled, the current scaling
magnification value for each axis is set to 1.00000.
The right column lists the current scaling magnification default value
for each axis. This value is used if P is not programmed or if P0 is
programmed in the G14.1 block. The range of the default value is
0.00001 to 999.99999 with a word format of 3.5. The default values
are stored in memory when the control is powered down. When the
control is powered up, these values are restored from memory.
3. Use the up or down cursor keys to move the block cursor to the
default value to be changed. The selected default value appears in
reverse video.
4. To replace stored default scaling magnification value, key in the new
default value and press the {REPLCE VALUE} softkey.
While scaling is enabled, these restrictions apply:
Scaling affects only programmed axis motion. All manual axis motions
and PAL axis mover motions are performed at full scale.
Scaling does not affect M-, F-, S-, T-, and B-word functions. The
F-word is scaled if the control is in inverse time mode (G93). Scaling
while in inverse time mode is applied as follows:
Programmed F word
Scaled F word (when in G93 mode) = ----------------------
Largest Scale Factor
Scaling is disabled during G27, G28, and G30 automatic home
operations. For a G29 automatic return from home operation, scaling is
re-enabled after the intermediate point is reached.
13.5.3
Scaling Restrictions