
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR αCi series B-65280EN/05
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15i 16i 30i
#7 #6 #5 #4 #3 #2 #1 #0
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SVMDRT
SVMDRT Whether to enable the rotation direction signal (SFR/SRV) function
on servo mode (rigid tapping/spindle positioning)
0 : Enables the rotation direction function.
If a move command from the CNC is positive (+),
(a) The spindle rotates in the CCW direction when the input
signal SFR (bit 5 of G70) = 1.
(b) The spindle rotates in the CW direction when the input
signal SRV (bit 4 of G70) = 1.
1 : Disables the rotation direction function.
If a move command from the CNC is positive (+), the spindle
rotates in the CCW direction when the input signal SFR = 1 or
SRV = 1.
15i 16i 30i
#7 #6 #5 #4 #3 #2 #1 #0
3005 4005 4005
VCTLPC
VCTLPC Sets the velocity feedback method.
0 : Exercises velocity control with an estimated velocity only.
1 : Uses a velocity calculated from the position coder signal to
exercise velocity control.
Set to 1.
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Velocity loop proportional gain on servo mode/spindle synchronous control
(HIGH) CTH1A=0
3045 4045 4045
Velocity loop proportional gain on servo mode/spindle synchronous control
(LOW) CTH1A=1
Unit of data :
Valid data range : 0 to 32767
Standard setting value : Depends on the motor model.
These parameters set a velocity loop proportional gain on servo mode
(rigid tapping/spindle positioning) or spindle synchronous control.
When the input signal CTH1A = 0, (HIGH) is selected. When the
input signal CTH1A = 1, (LOW) is selected.