Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 242)

Displays and Graphics
Chapter 8
8-26
The control for both QuickCheck and active graphics continues to plot tool
paths, even if the graphics screen is not displayed. Actual display of the
tool paths is only possible on the graphics screen. When the graphics
screen is displayed again, any new tool motions appear on the screen.
While on the graphics screen only the currently executing block is
displayed. The currently executing block is displayed on line 22 of the
CRT, and it is limited to 80 characters. Any characters following the
eightieth character in a block are truncated for display purposes only.
Important: If the graphic screen does not display the tool path you want,
you may need to alter the graphic parameters. To change your graphic
parameters see page 8-27.
Scale
When you first activate the graphics screen, the scale for the axes is based
on the software overtravel limits (see chapter 13). The selected axis with
the largest software overtravel limit is used as the scale axis for the
graphics screen. The range for the other axis is then scaled up to create a
proportional graph. This helps keeps the shapes on the graph proportional
(circles look like circles not ellipses etc.).
The zero of the scale for each axis is determined by the currently active
work coordinate system (G54-G59.3). Any time that a coordinate system
is changed, the scale automatically changes to match the current position
with the new position in the new coordinate system. Any offsets to the
work coordinate system also change the scale for the axes. When the
scale changes, the plot of the tool path does not change; only the scale
changes to match the plot to the new coordinate system.
If you want to adjust the scale, use zoom window. Refer to page 8-33.
Important: You can adjust the scale factor automatically to match the size
of the part program currently being executed. To do this, use the auto size
feature described in chapter 1.