Patent ID: 6111385
Filing Date: 2000-08-29
Classification: G05B

Abstract:
A driving apparatus using a motor, comprising:a stepping motor for generating a driving force;a moving mechanism for moving an object to be driven to a raised position, to a lowered position, and for holding the object at least in said raised position and in said lowered position on the basis of said driving force of said stepping motor, said moving mechanism moving said object between said raised position and said lowered position on the basis of a plurality of even-number steps of said stepping motor;a driving circuit for supplying a plurality of drive signal pulses equal to an even-number of steps to said stepping motor; anda power circuit for supplying a first voltage to said stepping motor when moving said object to said raised position, supplying a second voltage less than said first voltage to said stepping motor when moving said object to said lowered position, and for supplying a third voltage less than said second voltage to said stepping motor when holding said object in said raised position.