Sewing machine driving apparatus

摘要

PCT No. PCT/JP85/00087 Sec. 371 Date Nov. 4, 1985 Sec. 102(e) Date Nov. 4, 1985 PCT Filed Feb. 26, 1985 PCT Pub. No. WO85/03958 PCT Pub. Date Sep. 12, 1985.The present invention provides a machine driving apparatus which is composed of a brushless motor for switching the energization phase of the stator winding in accordance with the position of a rotor with a permanent magnet being provided in a rotor as a machine driving motor, compares a speed instructing signal to be generated from a speed instructing unit 32 in accordance with the displacement amount of a machine pedal 31 with a speed detecting signal detected by a speed detector 44 to control the rotational speed of a motor 42, also damps in reverse operation the motor 42 with a stop instructing signal to be generated by a position instructing unit 33 in accordance with the operation of the machine pedal 31 and a needle position detecting signal detected by a needle position detector 46 to stop the machine needle in a given position.