Flow quantity valve controller and manufacturing method for flow quantity valve.
A flow quantity valve controller includes a unit for positioning so that a phase of a stepper motor (300) becomes a predetermined phase when a motor shaft (306) making a linear move with rotation of the stepper motor (300) is pulled most into the stepper motor side (300). When the motor shaft (306) is pulled most into the stepper motor side (300), a flow quantity valve controller changes a stepper motor drive signal to a drive signal corresponding to a predetermined phase.