Date May.29.’02 Desig.
Desig. A.Fukumoto Apprv
FANUC Series 16i /18i -TB
Specifications of Servo-Spindle synchronous control
2.4 Spindle control by servo motor
The servo motor can be rotated in the rotating speed specified by the input
• Spindle control mode
The servo motor becomes spindle control mode by making Servo-Spindle switch
signal SVSP '1', and the servo motor rotates in the rotating speed specified by the
signal. Spindle control mode signal SVSPM becomes '1' in spindle control mode.
When Servo-Spindle switch signal SVSP is made '0', the spindle control mode is
released. At this time, signal SVSPM becomes '0'.
As for the spindle control mode inside, the coordinates value is not updated.
Therefore, the relation between coordinates value and an actual machine position
• Method of specifying rotating speed
The rotating speed of the servo motor in spindle control mode is specified by the
rotating speed control signal SVR01I-SVR12I. Please input the value obtained
by the undermentioned formula by the binary.
speed Spindle Max.
einput valu Signal ×=
Moreover, the rotating direction of the motor is specified by signal SVGN.
• Acceleration and Deceleration
When the spindle control mode is turning on or off, or signal SVR01I-SVR12I
changes, the de-and acceleration is done by the time constant of parameter
No.3843. The spindle control mode acc/deceleration completion signal SVAR
becomes '1' when the de-and acceleration is completed and motor speed becomes
a stationary state.
Speed of servo motor
2.5 Servo-Spindle synchronous control
The servo motor can be rotated synchronizing with the feedback pulse from the
position coder of the spindle.