PURPOSE: To remove the positional deviation between respective driving mechanisms changed according to embroidery speed, in an embroidery sewing machine having a plurality of driving mechanisms driven by independent driving sources, and hold the positional relation between respective driving mechanisms constant.
CONSTITUTION: An embroidery sewing machine has a first driving means formed of a main spindle motor 4 for simultaneously rotating and driving a hook mechanism 91, a needle bar mechanism 6, and a needle thread take-up mechanism 51; and a second driving means formed of a frame driving means 8 including an X, Y-axial servo motor for driving an embroidery frame mechanism 82 in X, Y-axial directions synchronously with the operating position of the needle bar mechanism 6. The main spindle motor 4 has a first rotating position sensor 41, and the X, Y-axial servo motor has a second rotating position sensor. At embroidery work, a correcting deviation is generated according to the operating speed of the main spindle motor 4, a prescribed position according to the detected position of the first rotating position sensor 41 is outputted as the command operating position of the frame driving means 8, and the frame driving means 8 is operated with a one obtained by correcting this position with the correcting deviation.
ICHIKAWA WATARU
OSHIE NAOMASA
FUJIURA MITSUHIRO
UENISHI KOJI
S G KK