10. SPINDLE SPEED FUNCTION
B-64693EN-1/01
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Servo motor rotation
Servo motor spindle control mode
acc./dec. completion signal SVAR (output)
servo motor spindle control mode signal
SVSPM (output)
Servo motor spindle switching signal
SVSP (input)
Servo motor rotation speed specification signals
SVR01I to SVR12I, SVGN (input)
Fig. 10.22.1 (c) Timing chart of signals during servo motor spindle control
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Servo motor spindle synchronization
Can rotate the servo motor in synchronization with the feedback pulses from the position coder of the
main-spindle.
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Servo motor spindle synchronization mode
By setting the servo motor spindle synchronization start signal SYSS <Gn061.2> to “1”, the system
enters servo motor spindle synchronization mode. When the system enters servo motor spindle
synchronization mode, the servo motor accelerates or decelerates to the rotation speed of the main-spindle
that is specified with parameter No. 3844. If a move command is commanded from the CNC in
acceleration/deceleration, alarm PS5211 “ILLEGAL AXIS OPERATION” is issued. Upon completion of
acceleration/deceleration, the servo motor spindle synchronization mode acceleration/deceleration
completion signal SYAR <Fn090.4> is set to “1”. Then the servo motor rotates in synchronization with
the feedback pulses from the position coder.
When the system enters servo motor spindle synchronization mode, the servo motor spindle
synchronization mode signal SYSSM <Fn090.5> is set to “1”.
By setting SYSS to “0”, servo motor spindle synchronization mode is canceled. If a rotation command is
being executed with servo motor spindle control, the sub-spindle accelerates or decelerates to the speed
specified at that point. Upon completion of the cancellation of servo motor spindle synchronization,
SYSSM is set to “0”.
Spindle speed
Servo motor rotation
Servo motor spindle synchronization mode
acc./dec. completion signal SYAR (output)
Servo motor spindle synchronization
mode signal SYSSM (output)
Servo motor spindle synchronization
start signal SYSS (input)
Fig. 10.22.1 (d) Timing chart of signals during servo motor spindle synchronization
NOTE
1 In servo motor spindle synchronization mode, coordinates will not be updated.
Thus, the relationships between coordinates and actual machine position will be
lost. That is, the updating of coordinates with NC commands in servo motor
spindle synchronization mode does not represent the actual movements of the
machine.