FANUC AC spindle motors have αi series and βi series. The former is a high-performance milling machine spindle motor, and αi series of drives supporting; the latter for the ordinary spindle motor, and βiSVSP series drive matching. FANUC AC milling machine spindle motor is a variable frequency dedicated motor. As shown in the figure is FANUC αi / βi AC spindle motor appearance and composition.
FANUC αi AC spindle motor stator no chassis, stator core shape was polygonal. The core of the edge of the axial ventilation holes, the motor has a separate power supply at the end of the cooling fan, the milling machine spindle motor forced cooling, the stator core in the air directly heat; rotor and ordinary three-phase AC motor, in addition, the stator winding is also equipped with thermistor. When the motor due to overload or winding short circuit caused by winding temperature rise to a certain value, the thermistor resistance changes. The temperature detection circuit in the spindle amplifier monitors the change of the resistance value and is fed back to the numerical control system via the serial bus. The CNC system can stop the control signal of the spindle immediately after the judgment and processing, and issue the alarm that the milling machine spindle motor is overheating or overload.
FANUC αi spindle motor in the magnetic sensor for rotor speed and angular displacement measurement, a 128 pulse/turn, 256 pulse/turn, 512 pulse/turn three specifications, without zero position signal (also known as a turn signal) for the Mi series, with zero position signal for the MZi series.
The above is about FANUC milling machine spindle motor basic introduction, you are welcome to continue to focus on updates.