
1.START-UP FANUC BUILT-IN SPINDLE MOTOR Bis series B-65280EN/05
- 502 -
(2) Direct current activation mode
In the direct current activation mode, magnetic pole detection is
performed while the motor is vibrating to a large extent.
When the motor is locked, magnetic pole detection is disabled.
Operation in the direct current activation mode is as follows:
<1> Perform direct current activation at a phase of the electric angle 0
deg.
<2> Check that the motor is stopped. The motor is assumed to be
stopped when a stop confirmation time (specified using the lower
two digits of parameter No. 4083) has elapsed after the motor
speed becomes 5 min
-1
or below.
<3> After checking that the motor is stopped, perform direct current
activation at a phase of the electric angle 90 deg.
<4> Check that the motor is stopped.
<5> After checking that the motor is stopped, the SPM alarm 65 is
issued if the phase difference of the rotor between the cases
where direct current activation is performed at the electric angle
0 deg and at the electric angle 90 deg is not within the range 80
to 100 deg.
The maximum travel distance from the start to end of magnetic pole
detection is the electric angle 270 deg.
IINORM
Motor speed
Enlarged view
(activation with the magnetic pole at 0-deg position)
Enlarged view
(activation with the magnetic pole at 90-deg position)
Normal end of magnetic
pole detection
Magnetic pole detection
activation
Stop confirmation
time
3sec
Stop confirmation time
3sec
Example of magnetic pole detection: Direct current activation mode
Parameter No. 4083=5030
Example of magnetic pole detection: Direct current activation mode
Parameter No. 4083=5030
Example of magnetic pole detection: Direct current activation mode
Parameter No. 4083=5030