Mode Cleaner Suspensions
Each MC suspension has 4 coils and 2 pico-motors (pitch, yaw).
ETM
Each iKAGRA ETM suspension has 4 coils and 4 pico-motors connected.
If the coil-magnet actuator seems to have a problem, please check 2 things.
1. Coil drivers in particular for Y-end had a loose connection with power line (-18V, -15V). Please check the LED on coil driver. If the LED is out, try to fasten the power line.
2. Sometimes watchdog? system stop the output current from the coil driver in order to protect mechanical system.