PROGRAMMING19. AXIS CONTROL FUNCTIONS
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
Both automatic and manual operations are the same as in ordinary
For how to switch between the synchronous operation and normal
operation modes, refer to the relevant manual published by the machine
When the automatic reference position return command (G28) is 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 must be issued in the normal operating mode.
When a move command is issued to the slave axis during synchronous
operation, a P/S alarm (No. 213) is issued.
The axis to be used as the master axis is set in parameter No. 8311.
The slave axis is selected by an external signal.
In synchronous axis control, commands that require no axis motion, such
as the workpiece coordinate system setup command (G92) and the local
coordinate system setup command (G52), are set to the Y axis by program
command Yyyyy issued to the master axis.
For signals such as external deceleration, interlock, and machine lock,
only the signals issued to the master axis are valid in the synchronous
operating mode. Signals issued to other axes are ignored.
Both the pitch error and backlash are compensated independently for the
master axis and the slave axis.
Turn on the manual absolute switch (ABS = 1) during synchronous
operation. If it is off, the slave axis may not move correctly.
The difference between the master axis and slave axis in servo positional
deviation is always monitored. If the difference exceeds the parameter–
set limit, an alarm (No. 213) is issued.
The difference between the master axis and slave axis in machine
coordinates is always monitored. If the difference exceeds the parameter–
set limit, an alarm (No. 407) is issued.
D Normal operation
D Switching between
and normal operation
D Automatic reference
D Specifying the slave axis
D Master axis and slave
D Setting a coordinate
D External deceleration,
interlock, and machine
D Pitch error
D Manual absolute
D Synchronization error
check using positional
D Synchronization error
check using machine