
4.AUTOMATIC OPERATION OPERATION B-63944EN/02
- 960 -
- M, S, and T commands not usable in over store mode
The M, S, and T functions listed below, unlike the other M, S, and T
functions, have special meanings within the CNC. These M, S, and
T commands cannot be specified from the over store screen. To
specify these commands, cancel the over store mode, and execute
them in MDI operation.
Example:
• Spindle positioning
• Rigid tapping
• Tool management
WARNING
As a rule, the tool cannot be returned to a correct
position under the following conditions.
Special care must be taken in the following cases
since none of them cause an alarm:
- Manual operation is performed when the manual
absolute mode is OFF.
- Manual operation is performed when the machine
is locked.
- When the mirror image is used. However, P type
return is possible for a block that switched
between ON and OFF most recently or a
subsequent block. In this case, the mirror image
signal status present when the program was
interrupted must be maintained.
- When no coordinate system is set up at the
beginning of a program in which main commands
are executed in the incremental mode.
- When manual operation is performed in the course
of axis movement for returning operation.
- When the program restart is commanded for a
block between the block for skip cutting and
subsequent absolute command block.
- When program restart is specified in the machine
lock state, then the machine lock is canceled.
- When program restart specified for an
intermediate block for a multiple repetitive canned
cycle
- In general, when a coordinate system is set up,
changed, or shifted after the search operation
ends, the tool cannot be returned to a correct
position.