An FX-1 Machine has a proximity sensor on L-head, take care to keep away tools, watches, etc. from the sensor. The proximity sensor is used to prevent the interference between the left and right head. Once the proximity sensor detects a metal object that contacts or approaches closely to the sensor, the system will shut down the servo power and display a message telling that the both heads are approaching each other closely. If the sensor is activated by a misoperation, and the servo power is interrupted accordingly, initialize all the axes.