Mitsubishi Electric MELDAS C6 Instruction Manual page 247

User macro I and II
(Note 1) Reference point return commands and start position return commands are valid, but the
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2. Screen Operation of A985GOT
Function name
actual machine movement (trace display) will differ partially from the drawing by the
program check function.
When a reference 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 reference 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.
Movement to
intermediate point
by G28
Intermediate point
search engine
2.8 Graphics
Graphic
check
Basic variable operations, and all judgment and
branch functions are valid.
Note that the following functions are invalid.
• Macro interface input/output
• NC alarm
• Single block stop, miscellaneous function complete
signal, WAIT suppression.
• Feed hold, feedrate override, G09 valid/invalid
• Position data Note that the end point coordinates
of the previous block are valid.
When these commands are issued, they are ignored
or illegal data is input.
X in G53 basic machine coordinate system
G28 reference point return
G29 path with
trace display
G29 command
positioning
movement
I - 232
Remarks
#1
1st reference point
G28 path with trace display
Movement to
intermediate
point by G29