FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

B–62754EN/01
20. AXIS CONTROL FUNCTION
PROGRAMMING
351
2 According to the Yyyyy command programmed for the slave axis,
movement is performed along the Y–axis, as in normal mode.
3 According to the Xxxxx Yyyyy command, simultaneous movements
are performed along both the X–axis and Y–axis, as in normal mode.
Both automatic and manual operations can be controlled, as in normal
CNC control.
For details of how to switch the synchronous and normal operations, refer
to the manual supplied by the machine tool builder.
If a command for automatic reference position return (G28), or return to
the second, third, or fourth reference position (G30), is issued in
synchronous operation mode, a reference position return is performed for
the X–axis, and an identical movement is performed for the Y–axis. If
this Y–axis movement agrees with a return to the reference position on
the Y–axis, a lamp indicating that reference position return has been
completed for the Y–axis also lights.
It is recommended, however, that G28 and G30 be specified in normal
operation mode.
If a command for checking automatic reference position return (G27) is
issued in synchronous operation mode, identical movements are
performed for the X–axis and Y–axis.
If these X–axis and Y–axis movements correspond to returns to the
reference positions on the X–axis and Y–axis, the lamps indicating that
reference position return has been completed for the X–axis and Y–axis
light. If not, an alarm is output.
It is recommended, however, that G27 be specified in normal operation
mode.
If a move command is specified for the slave axis in synchronous
operation mode, P/S alarm 213 is output.
The master axis is defined in parameter 8311. The slave axis is specified
by an external signal.
If coordinate system setting or tool compensation causing a shift in the
coordinate system is performed in synchronous operation mode, P/S
alarm 214 is output.
In synchronous operation mode, the signal for external deceleration,
interlock, or machine lock of the master axis only is valid. The
corresponding slave axis signal is ignored.
Pitch error compensation and backlash compensation are performed
separately for the master and slave axes.
In synchronous operation mode, the manual absolute switch must be set
to on (ABS must be set to 1). If the switch is set to off, the correct slave
axis movement may not be made.
Manual operations cannot be synchronized.
D Switching synchronous
and normal operations
D Automatic reference
position return
D Checking automatic
reference position return
D Slave axis command
D Master and slave axes
Limitations
D Coordinate system
setting and tool
compensation
D External deceleration,
interlock, machine lock
D Pitch error
compensation
D Manual absolute switch
D Manual operation

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