
1.START-UP FANUC BUILT-IN SPINDLE MOTOR Bis series B-65280EN/05
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1.5.6 Sequence
(1) When SFR or SRV is used as a start signal (Parameter No.4007#7:EPFSIG=0)
Magnetic pole undetected state
The speed command is ignored.
Motor speed
Magnetic pole 0 deg
Position movement
Power-on
MRDY
& *ESP
SFR/SRV
Speed command
EPFIX
Magnetic pole detection completed state
The speed command is accepted.
The magnetic pole position
is lost, so that the speed
command is ignored.
Magnetic pole detection completed
MPOF=0
& EPFSTR=0
1)
2)
3)
4)
6)
5)
n alarm causing the magnetic
pole position to be lost is issued,
resulting in EPFIX = 0.
Magnetic pole 90 deg
Position movement
When SFR or SRV is input in the magnetic pole undetected state
(EPFIX = 0), the motor automatically starts magnetic pole detection
operation before the speed command is read. Then, upon completion
of magnetic pole detection (EPFIX = 1), the speed command is read
and the motor starts rotation. Do not input MPOF (motor power
turn-off signal) and EPFSTR (magnetic pole detection start signal).
(1) After turning on the power, the operator is to make a preparation
to activate the motor.
(2) Upon completion of preparation, set SFR (or SRV) to 1.
(3) The motor automatically starts magnetic pole detection in the
magnetic pole undetected state (EPFIX = 0).
(4) When magnetic pole detection operation is started, the motor
moves to the magnetic pole 0 deg position then moves to and
stops at the magnetic pole 90 deg position (machine angle 90
deg/number of magnetic poles), determining the magnetic pole.
(5) Upon magnetic pole determination, the magnetic pole detection
completed state (EPFIXA = 1) is set to enable the motor to be
driven. If a command is already input during magnetic pole
detection, the motor starts rotation at the same time as magnetic
pole determination. The operator may feel this motor operation
as an unexpected motion. So, provide an interlock so that a
command such as a rotation command can be input after the
magnetic pole detection completed state (EPFIX = 1) is
confirmed.
(6) If an alarm that causes the magnetic pole position to be lost is
issued, the magnetic pole undetected state (EPFIX = 0) is set.
When specifying the next rotation command, start all over again
from the beginning of the sequence.