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

B-63324EN/03 PROGRAMMING 19.AXIS CONTROL FUNCTIONS
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19.3 SYNCHRONIZATION CONTROL
When one axis is driven by two servo motors as in the case of a large
gantry machine, a command for one axis can drive two motors
synchronously. Moreover, for synchronization error compensation,
feedback information from each motor allows a positional difference
(synchronization error) between the two motors to be detected. If a
synchronization error beyond a set value occurs, an alarm is issued to
stop movement along the axes.
The reference axis for synchronization error compensation is referred
to as a master axis (M axis), while the axis to which a compensation is
applied is referred to as a slave axis (S axis).
Fig. 19.3 Example Machine with Synchronization Axes Xm and Xs
Y
Z
Xs (slave axis)
Xm (master axis)

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