
B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
677
⋅ When the spindle is an analog spindle, the loop gains of the spindle and
tapping axis are switched according to the values set in these
parameters.
⋅ When the spindle is a serial spindle, the loop gain of the tapping axis
is switched according to the values set in these parameters. The loop
gain of the spindle depends on the values set in the serial spindle
parameters and applied gear signals (CTH2, CTH1).
Accordingly, to perform rigid tapping with a serial spindle, the loop gain
for position control of the spindle must be set in the serial spindle
parameters used for rigid tapping.
When multi–spindle control is being used, rigid tapping can also be
performed for the second spindle. For the serial spindle used for rigid
tapping, set the parameters indicated below.
The parameters indicated below are the major serial spindle parameters
required for the setting and adjustment needed to use a serial spindle.
For details of the serial spindle parameters, refer to the “FANUC AC
SPINDLE MOTOR ai series PARAMETER MANUAL (B–65280EN)”.
4044 Proportional gain of the velocity loop in servo mode (gear 1, gear 2)
4045 Proportional gain of the velocity loop in servo mode (gear 3, gear 4)
[Valid data range] 0 to 32767
Set a proportional gain for the velocity loop in a servo mode (such as rigid
tapping mode).
4052 Integral gain of the velocity loop in the servo mode (gear 1, gear 2)
4053 Integral gain of the velocity loop in the servo mode(gear 3, gear 4)
[Valid data range] 0 to 32767
Set an integral gain of the velocity loop in a servo mode (such as rigid
tapping mode).
4065 Position gain in the servo mode (HIGH)
4066 Position gain in the servo mode (MEDIUM HIGH)
4067 Position gain in the servo mode (MEDIUM LOW)
4068 Position gain in the servo mode (LOW)
[Unit of data] 0.01 sec
–1
[Valid data range] 0 to 65535
Set a servo loop gain in a servo mode (such as rigid tapping mode).