Abstract: A novel motor controller controls a stepping motor and includes a command value calculator to calculate and output a speed command value and an angle command value based on a reference clock. A control method selector is included to select one of the open-loop control and the closed-loop control in accordance with the speed command value. A command value output unit is included to output a first target value as the first current command value when the open-loop control is selected and outputs a second target value as the second current command value when the closed-loop control is selected. The motor controller controls the stepping motor based on the first target value when the open-loop control is selected and the second target value when the closed-loop control is selected.

Abstract: A processing object modifying apparatus includes a conveying unit that conveys a processing object; a plasma processing unit that performs plasma processing onto a surface of the processing object while the processing object is being conveyed by the conveying unit; a measuring unit that measures a pH value of the processing object to which the plasma processing has been applied; and a controlling unit that controls the conveying unit to change a conveying speed of the processing object on the basis of a measurement result of the measuring unit, the processing object to which the plasma processing is being applied.