
4.AUTOMATIC OPERATION OPERATION B-63784EN-1/01
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4.12 ACTIVE BLOCK CANCEL
Part programs can be halted, and the remaining amount of tool
movement in the currently executing block can be canceled by pressing
the active block cancel switch on the machine operator's panel. Though
this halts automatic operation, modal information is still maintained.
Operation is restarted from the block following the block where
operation was canceled by cycle start.
Operation is as follows when the active block cancel switch on the
machine operator's panel is pressed during automatic operation:
1 When the machine tool is moving, tool feed decelerates and
comes to a stop, and the remaining amount of tool movement is
canceled.
2 Dwell is canceled during dwell execution.
3 Refer to the relevant manual published by the machine tool
builder for operations during execution of miscellaneous
functions, spindle functions, tool functions and second auxiliary
functions.
If the Cycle Start button is pressed with machine operation halted,
automatic operation is restarted from the block following the block
where operation was canceled.
Refer to the relevant manual published by the machine tool builder for
the active block cancel switch.
Explanation
- Operation at restart of operation (G90)/(G91)
When operation is restarted, operation at restart of operation is
determined by the command programmed to the block following the
block where operation was canceled. If the following block is
programmed using absolute commands, operation is restarted after the
tool moves towards the end point of the following block from the
position where it stopped. If incremental commands are programmed in
the following block, operation is restarted in the incremental mode
from the position where the tool stopped.
Next block
Programmed tool path
When G90 is specified
in next block
When G91 is specified
in next block
Position where tool
halts by signal
Fig. 4.12 (a) G90/G91