
4. SERVO FUNCTION DETAILS B-65150E/04
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4.17 TANDEM CONTROL FUNCTION
(1) Overview
If a single motor is not capable of producing sufficient torque to drive a
large table, for example, tandem control allows two motors to produce
movement along one axis.
A motor of the same specification is used for both the main motor and
sub-motor.
Only the main motor is responsible for positioning. The sub-motor
only produces a torque. In this way, double the torque can be obtained
(load sharing mode).
By applying a preload torque to produce tension between the main
motor and sub-motor, the backlash between gears can be reduced
(anti-backlash mode).
Tandem control is used to run linked linear motors and motors with a
winding tandem (α300, α400, etc.).
(2) Applicable servo software series and editions
Series 9060/F(06) and subsequent editions (Series 15-B, 16-A, 18-A,
Power Mate)
Series 9080/A(01) and subsequent editions (Series 15-B, 16-C, 18-C)
Series 9090/C(03) and subsequent editions (Series 16i-A, 18i-A, Power
Mate i)
Series 90A0/A(01) and subsequent editions (Series 15i-A, 16i-A, 18i-
A, Power Mate i)
Main
motor
Reducer
Pinion
Reducer
Sub-
motor
Rack
Pinion
Fig. 4.17 (a) Example of tandem control application (1)
Optional function