PURPOSE: To reduce the cost by decreasing the capacity of a transformer which boosts up/steps doen a voltage by an input power source in a machinery using both a motor of single-phase 100V and the one of single-phase 200V.

CONSTITUTION: The machinery using both the motor 19 of single-phase 100V and the one of single-phase 200V is comprised so as to boost upstep down the voltage of either the motor 19 of 100V or the motor 30 of 200V different from the input power source by the tranformer 40. Therefore, the capacity of the transformer (25W) 40 can be decreased by boosting up/stepping down the voltage of either the motor 19 of 100V or the motor 30 of 200V different from the input power source by the transformer 40, which reduces the cost.