An IC which includes a first circuit and a plurality of first paired terminals each including a first power supply terminal and a first GND terminal which are connected to the first circuit, and a second circuit and a plurality of second paired terminals each including a second power supply terminal and a second GND terminal which are connected to the second circuit. The wind turbine converts wind energy into a driving torque applied to the generator. The internal thread engages with the external thread. The teaching operations for positioning the robot and the laser beam scanning device to the prescribed position are performed independently of the teaching operations for controlling the scanning of the laser beam at the processing spot in the scan pattern.