
11. PROGRAM COMMAND
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Upon completion of positioning in each block in the program, an external
operation function signal can be output to allow the machine to perform
specific operation.
G81 IP_ ; (The IP_ is axis move command )
Every time positioning for the IP_ move command is completed, the CNC
sends an external operation signal to the machine. An external operation
signal is output for each positioning operation until canceled by G80 or
a group 01 G code.
No external operation signals are output during execution of a block that
contains neither X nor Y.
1 Once positioning for a move command has been completed, the CNC
sets the external operation signal EF to 1.
2 When the EF signal is set to 1, the PMC executes drilling or another
operation. Once the operation has been completed, the PMC sets
completion signal FIN to 1.
3 The CNC resets the EF signal to 0 upon the elapse of the time (TFIN)
specified in parameter No. 3011 after the FIN signal is set to 1.
4 When the EF signal is set to 0, the PMC resets the FIN signal to 0.
5 The CNC starts executing the next block.
The timing diagram is shown below:
EF
G81 command
Positioning
Machine operation
FIN
Next block
TFIN
Fig. 11.7 Timing diagram of basic procedure
11.7
EXTERNAL MOTION
FUNCTION
(M SERIES)
General
Basic procedure