The present application is directed to embodiments for moving a media sheet within a scanning device. The processor generates an indicator off-time value and an indicator on-time value from the processor. The thread wear gauge has a gauging thread with a silhouette that permits it to threadably engage with a coil thread that has been worn so that the shear load bearing area of the thread has been worn away from the coil thread to the point where the coil thread is unsafe for further use. Because typical EDA timing analyses focus mainly on delay and slew, a two-capacitance receiver model can provide a high degree of accuracy without significantly increasing cell library size and computational complexity.