Systems, methods, devices, and computer readable media for controlling the operation of an industrial machine including one or more components. The blade is enclosed within the housing and cannula, and has a horizontally-oriented pushing component and a vertically-oriented cutting component that protrudes through the slot of the cannula. A first portion of light from the light source is reflected by the partially reflective element and propagates to the optical spectrum analyzer. Consequently, it is possible to obtain a nonvolatile display device capable of reducing power consumption and operating with a small battery.