| 摘要 |
PROBLEM TO BE SOLVED: To prevent reduction in a power source voltage.SOLUTION: A sewing machine 10 includes: a main power source circuit 41 which is connected to an external power source 200; a sewing machine motor 24 which is a driving source of a sewing operation; drivers 21, 22 and 23 which become the driving source of the operation accompanying sewing; a sub-power source circuit 44 which supplies the drivers with power from the main power source circuit; and a power source control part 50 which controls the main power source circuit. It also includes a voltage detection part 411 which detects primary voltage of a transformer which the main power source circuit has. The power source control part performs control to stop an electric current to the sewing machine motor during a predetermined stop time when the primary voltage detected by the voltage detection part goes down to the predetermined lower limit value or below. |
