
B–63523EN–1/03
1. AXIS CONTROL
157
To specify the axis configuration in tandem control, follow the procedure
below:
(1)Tandem control can be performed for up to four pairs of axes.
(2)In terms of controlled axes, the pair of axes is handled as two separate
axes. In terms of CNC–controlled axes (command axes), the pair of
axes is handled as a single axis (master axis). Specify the number of
CNC–controlled axes with parameter 1010, excluding the slave axis
of tandem control. The slave axis must be handled as if it were
controlled only by the PMC.
(3)The pair of axes is handled as two separate axes in the management of
servo parameters and the monitoring of servo alarms.
(4)Assign two consecutive numbers, that is one odd and one even
number, to the master and slave axes as their servo axis numbers
(parameter 1023). Assign the smaller number to the master axis.
(Example) If the servo axis number of the master axis (parameter
1023) is set to 1, specify servo axis number 2 for the corresponding
slave axis. If the servo axis number of the master axis is set to 3,
specify servo axis number 4 for the corresponding slave axis.
(5)If tandem control is performed for two or more pairs of axes, assign
servo axis numbers to the master and slave axes in identical order.
(6)Specify a unique axis name for the slave axis.
(7)The slave axis is handled as a controlled axis. Set the NDPx bit (bit
0 of parameter 3115) to 1 to suppress the position display.
The following sample axis configuration is for a machine with six axes
X, Y, Z, A, B (PMC axis), and C. The X–axis and Y–axis are the master
axes of tandem control.
Number of controlled axes (optional parameter): 6
Number of CNC controlled axes (parameter 1010): 3
Axis
number
Axis
name
Servo axis
number
(PRM. 1023)
1 X 3 CNC axis (master axis of tandem control)
2 Y 1 CNC axis (master axis of tandem control)
3 Z 6 CNC axis
4 A 4 Slave axis of tandem control (master axis:
X–axis)
5 B 5 PMC axis
6 C 2 Slave axis of tandem control (master axis:
Y–axis)
Explanations
D Axis configuration in
tandem control