Spindle Motor (Synchronous Motor) Mounting sensor & Starting sequence Specifications Additional Manual Page 2
Additional Manual
Rev
DATE
CONTENTS
Takahashi
Design
TITLE
DNr. A-63639-067E
FANUC
PAGE
２/8
02
2000.11.09
PRM4008#6 added Toyozawa
Synchronous Spindle Motor
Mounting Sensor/Starting sequence
Specification
1. Mounting sensor
1. Mounting sensor1. Mounting sensor
1. Mounting sensor
The current of the synchronous motor is controlled according to the pole position of the magnet built
in the motor rotor. There are two method prepared in the spindle control software in order to get the
pole position.
The first method uses a reference signal of BZ sensor as zero position of the pole. Therefore, it is
necessary to fix the reference signal position of the BZ sensor to the zero pole position of the
synchronous motor. The following is the explanation about how to mount the BZ sensor on the
synchronous motor.
The second method doesn’t use the reference signal but use the temporary pole position that the
software can get at earlier stage in the first method.
PRM4008#6 chooses which method is available in spindle control software. In case of PRM4008#6=1,
skip the explanation of chapter 1.1 and 1.2. The method of a mounting sensor is to be based on the
specifications (B-65202A/02) of stated chapter 1.1.
1.1 BZ sensor
1.1 BZ sensor1.1 BZ sensor
1.1 BZ sensor
The BZ sensor consists of the mounting detector attached to the motor and the mounting ring (Ring
A for the feedback, Ring B for the reference signal) attached to the spindle shaft. If the inner
diameter of the ring doesn’t fit the outer diameter of the shaft, the sleeve is necessary.
The BZ sensor has to be installed on the rotating axis at the side of power leads, and the ring A &
the detector must face the motor. If the sensor is installed incorrectly, the motor cannot be controlled
normally.
And furthermore, refer to “FANUC BUILT-IN AC SPINDLE MOTOR α series DESCRIPTIONS (B-
65202EN/02)” about the BZ sensor, the measurements of the parts to install the BZ sensor, the install
position and the accuracy.
1.2 The process to mount the BZ sensor
1.2 The process to mount the BZ sensor1.2 The process to mount the BZ sensor
1.2 The process to mount the BZ sensor
(1) Fix the detector so that the deviation between the mounting ring and the center of shaft is within
±0.02mm.
(2) Press Ring A and B into the sleeve or connect them by heat hardening with Ring A and B fitted
closely.
*1
(3) Let the motor shaft free to rotate by a hand, not to lock.
(4) Connect the motor power line to DC supply as follows.
•Positive terminal of DC supply to U phase of motor
•Negative terminal of DC supply to V and W phase of motor together connected
(5) Pour about one third of the maximum motor current from U to V&W and stick the shaft to a position
in stall. In case of the easy moving by the little force of a hand, there is possibility of inaccurate
positioning due to the friction. If so, make the positioning accurate by means of increasing the
current to get rid of the influence.
*2,*3
(6) Adjust the sleeve position when the sleeve attached the detection ring is fitted by heat hardening
keeping Ring A place at the motor side.
Radial direction: Adjust to fit the key of Ring B to the center of the detector.
*4
Thrust direction: Adjust the deviation between a half place in the thickness of the detection ring
(9.3mm) and the center of the detector within ±0.5mm. Furthermore keep the
Contents Summary of Spindle Motor (Synchronous Motor) Mounting sensor & Starting sequence Specifications Additional Manual
- Page 1Spindle Motor (Synchronous Motor) Mounting sensor & Starting sequence Specifications 1. Mounting sensor............................................................................................................................２ 1.1 BZ sensor .........................................................
- Page 21. Mounting sensor The current of the synchronous motor is controlled according to the pole position of the magnet built in the motor rotor. There are two method prepared in the spindle control software in order to get the pole position. The first method uses a reference signal of BZ sensor as zero
- Page 3running out of the center moving of the ring within ±0.03mm for the detector. (7) Turn off DC supply and make certain the feedback signal correctly output. Refer to “FANUC BUILT-IN AC SPINDLE MOTOR α series specification description B-65202” as to the way of confirmation. (8) After moving the shaft
- Page 42. Starting sequence It is necessary that Spindle software recognizes the pole position of the synchronous motor to control the current. Spindle software uses BZ sensor with the synchronous motor to recognize the pole position. From now on, we abbreviate “the spindle software in Spindle module” to S
- Page 5rotation depends on initial position at the time. •Alarm 65 is issued when the rotation angle from 0 to 90 degrees position amount less than 80 degrees after confirming the stall at 90 degrees position. This might happen if the motor is locked up mechanically. If so, release it to move the motor aft
- Page 62.1.The sequence of Pole position detection The pole detection works only once after Power on or after happening of alarm that lose the pole position. The sequence of it is as (1) and (2) as described below. 2.1.1.SFR/SRV is trigger signal case Power MRDY & *ESP SFR or SRV Alarm lost pole position h
- Page 72.1.2. EPFSTR is the trigger signal case Power MRDY & *ESP Alarm lost pole position & SFR/SRV happens、EPFIX=0 EPFSTR Velocity command Lost pole position Pole set Invalid velocity command Valid velocity command EPFIX Lost pole pos. Invalid velocity command Motor Velocity 0 position 90 position Pole d
- Page 82.2.PMC signal for Pole position detection The below table summarizes the PMC signal necessary to achieve pole detection. The bold type is added this time for the synchronous motor. INPUT (PMC → CNC) FS15 FS16 #7 #6 #5 #4 #3 #2 #1 #0 G227 G070 MRDY SFR SRV G226 G071 *ESP G228 G073 EPFSTR SYMBOL MEAN