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9. Graphics
9.4 Use of the Check Modes
I-357
(Note 1) Zero point return commands and start position return commands are valid, but the actual
machine movement (trace display) will differ partially from the drawing by the program check
function.
When a zero point return is carried out via the intermediate point with a G28 or G30 command,
positioning to the intermediate point is in a straight line. Positioning from the intermediate point to
the zero point is carried out independently for each axis.
With the G29 command, positioning to the intermediate point is also carried out independently for
each axis.
However, drawings using program checking are always drawn with straight lines, even when
returning via the intermediate point. Thus, the path will differ partially from the trace display.
X in G53 basic machine coordinate system.
G28 path with trace
display
1st zero point
#1
Movement to
intermediate
point by G29
G28 zero point return
G29 path with
trace display
Movement to
intermediate
point by G28
Intermediate point
G29 command
positioning
movement
(5) Handling of variables, parameters and compensation amounts
All the various data in program checking is handled in the same manner as when all operations are
executed.
Saving data before
the checking start
Explanation
Parameters Not possible Input commands executed in program checking are
set as actual data.
Workpiece offset
Not possible Same as above.
Common variable
Not possible Same as above.
Local variable
Not possible Same as above.
Tool compensation
amount
Not possible Same as above.