
B-65280EN/05 FANUC AC SPINDLE MOTOR αi series 2.EXPLANATION OF OPERATION MODES
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2.3 RIGID TAPPING
Optional function
2.3.1 Start-up Procedure
A. Check that operation in the velocity control mode is enabled.
B. Prepare and check the rigid tapping ladder program.
C. Set up the detector-related parameters according to the system
configuration.
- Specify to use the spndile sensor and spindle motor.
- Specify the rotation direction of the spindle and motor and that of the
spindle and position coder.
- Set up the gear ratio between the spindle and motor.
- Specify an arbitrary gear ratio (for rigid tapping that uses a signal from
the built-in sensor when the gear ratio between the spindle and motor is
not 1:1).
D. Adjust the parameters according to the adjustment procedure.
- Maximum rotation speed and acceleration/deceleration time constant for
rigid tapping
- Position gain for rigid tapping
- Velocity loop proportional and integral gains for rigid tapping
- Motor voltage for rigid tapping
- Motor activation delay
E. Check the precision by actually performing cutting.
If there is a problem with the precision of the machine, adjust the
acceleration/deceleration time constant and velocity loop gains again.
2.3.2 Overview
Rigid tapping is a function for performing high-precision tapping by
exercising position control so that the spindle rotation is synchronized
with tapping axis feed at all times.
This subsection describes the specifications of the rigid tapping
function related to the serial spindle.
NOTE
To use this function, the CNC software option is
required.