Date May.29.’02 Desig.
Desig. A.Fukumoto Apprv
FANUC Series 16i /18i -TB
Specifications of Servo-Spindle synchronous control
• Servo-Spindle synchronous control mode
The servo motor becomes a Servo-Spindle synchronous mode by making Servo-
Spindle synchronous signal SYSS '1'. The servo motor is accelerated up to the
same speed as the spindle specified by parameter No.3844 or decelerates when
entering the Servo-Spindle synchronous mode. When the de-and acceleration is
completed, Servo-Spindle synchronous mode acc/deceleration completion signal
SYAR becomes '1'. Afterwards, the servo motor rotates synchronizing with the
feedback pulse of the position coder.
The signal SYSSM becomes '1' when becoming a Servo-Spindle synchronous
mode. When signal SYSS is made '0', the Servo-Spindle synchronous mode is
released. When signal SYSS is made '0', the deceleration is begun. When the
releasing of synchronization is completed, signal SYSSM becomes '0'.
Servo m otor speed
As for the spindle control mode inside, the coordinates value is not updated.
Therefore, the relation between coordinates value and an actual machine position
is lost. In a word, the update of the coordinates value by the NC command in the
Servo-Spindle synchronous mode does not show the movement of an actual
• Relation to spindle control mode
The rotation command by the spindle control (SVSP,SVRxxI) becomes invalid in
the Servo-Spindle synchronous mode. When input signal SYSS is turned off, the
rotation command by the spindle control (SVSP,SVRxxI) becomes effective