STARTING SPEED CONTROLLER FOR INDUSTRIAL SEWING MACHINE

摘要

PURPOSE:To prevent a thread from coming out at the sewing time and to stabilize the quality of sewing by changing the starting speed according to the change amount of the variable resistance at the time of motor driving. CONSTITUTION:As shown in a figure 2, a sweing operator turns on a a switch 10a, a speed controller 9a reads the set value of a variable resistance 12, and changes the starting speed of the motor 3 according to the change amount of the variable resistance 12.