Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 19.AXIS CONTROL FUNCTIONS
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The synchronous operation can be executed in automatic operation,
continuous manual feed, manual handle feed, and incremental feed. It
cannot be executed in manual return to the reference position.
- Independent operation
This mode is used to machine a small workpiece on either of the two
tables. The move command specified for the master axis can determine
the movement along the master or slave axis.
(1) Command Yyyyy specified for the master determines the
movement along the Y-axis.
(2) Command Yyyyy specified for the master axis determines the
movement along the V-axis.
The command specified for the master axis can be used even when only
the slave axis is operated. An identical command can be used,
irrespective of the table on which the workpiece is placed.
Independent operation can be executed in automatic operation. In
automatic operation mode, independent operation can be performed. In
manual operation mode, synchronous or normal operation should be
performed.
- Normal operation
This operating mode is used for machining different workpieces on
each table. The operation is the same as in ordinary CNC control,
where the movement of the master axis and slave axis is controlled by
the independent axis address (Y and V). It is possible to issue the move
commands to both the master axis and slave axis in the same block.
(1) The Y axis moves normally according to program command
Yyyyy issued to the master axis.
(2) The V axis moves normally according to program command
Vvvvv issued to the slave axis.
(3) The Y axis and the V axis move simultaneously according to
program command YyyyyVvvvv.
Both automatic and manual operations are the same as in ordinary CNC
control.
- Switching to synchronous, independent, or normal operation
For an explanation of switching to synchronous, independent, or
normal operation, refer to the manual provided by the machine tool
builder.
- Automatic reference position return
When the automatic reference position return command (G28) and the
2nd/3rd/4th reference position return command (G30) are issued during
synchronous operation, the V axis follows the same movement as the Y
axis returns to the reference position. If the V axis is positioned at the
reference position after the return movement is complete, the reference
position return complete signal of the V axis goes on when that of the Y
axis goes on.
As a rule, commands G28 and G30 must be issued in the normal
operating mode.

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