
B–63523EN–1/03
1. AXIS CONTROL
170
WARNING
1 When synchronous control is started or terminated, the
target axes must be at a stop.
2 All axes subjected to synchronous control must have the
same least command increment, detection unit, and
diameter/radius specification. Otherwise, the amount of
movement will differ from one axis to another.
3 During synchronous control, do not change the parameters
related to synchronous control.
4 Before starting synchronous control after an emergency
stop, servo–off, or servo alarm is released, be sure to make
a return to the reference position and set up the necessary
coordinate system.
5 Before starting synchronous control, make sure that for the
target axes, a reference position return after power–on has
been made and a reference position has been set up
according to the absolute pulse coder.
6 Acceleration/deceleration control, pitch error compensa-
tion, backlash compensation, and stored stroke limit check
are performed independently of synchronization control.
7 A move command should not be issued to a synchronous
slave axis during synchronous control.
8 The same acceleration/deceleration time constants and
servo parameters should be used for the axes subjected to
synchronous control as much as possible.
9 The workpiece coordinate system of a synchronous slave
is not affected by the synchronous master axis operations
that affect the workpiece coordinate system but do not
cause the machines to move, such as workpiece coordinate
system set/shift and geometry offset commands.
10 If a wear offset command or tool–tip radius compensation
is performed for a synchronous master axis, the travel path
of the slave axis is shifted by the offset, but the offset is not
set (no offset vector is created).
11 When using parking signal PK7 or PK8 while both spindle
synchronous control and simple spindle synchronous
control are being applied, set the SPK bit (bit 7 of parameter
No. 4800) to 1. This sets parking signals PKESS1 and
PKESS2, used for simple spindle synchronous control, to
#6 and #7 of G031.
NOTE
1 More than one axis can be placed in a synchronous state
at the same time. However, an axis cannot be synchronized
with more than one axis simultaneously.
2 Synchronous control and simplified synchronous control
cannot be specified simultaneously.
Warning, Caution, and
Note for synchronous
control