CAM UNIT USING CONTROL TECHNIQUE OF SERVO MOTOR

摘要

PURPOSE: A cam unit using the control technique of a servo motor is provided to perform a reciprocating angular motion of a needle shaft without using the cam by controlling the servo motor. CONSTITUTION: A cam unit using the control technique of a servo-motor is composed of a reciprocating vertical motion driving unit(A), and a reciprocating angular motion driving unit(B). In the reciprocating vertical motion driving unit(A), the power of a driving motor(100) is converted into a rotary motion of a driving shaft(110). The rotary motion of the driving shaft(110) is transmitted to a pulley(210) of a power transmitting unit(200) by a power transmitting belt(B1). The rotary motion of the pulley(210) is converted into a vertical reciprocating motion by a driven arm(220), and thus, a needle shaft(NB) reciprocates vertically.