In a motor having a number of poles that have nominally equiangularly-spaced positions that in fact deviate from those positions, the actual periods between zero-crossings of the back-EMF generated during pole-pair interactions are measured. Based on a direction detection signal and a PWM signal of a PWM signal generation unit, an operation mode of a power converter circuit is determined, and a ratio correction value and an offset value of the PWM signal is set with respect to a control period of the PWM signal. Interface information, defining a traffic flow to be controlled by a security rule, is received via the configuration interface. The linked segments are configured to be transported as a single unit without an additional external framework. The result of this process and machine is to improve the paper quality, save fibers and chemicals and fulfill the required paper properties. Further, a wheel is disposed to rotate under the action of the push-rod, and the wheel is disposed to operate an energy conservation means.