Using electromagnetic valve control, pedaloperation.
采用电磁阀控制，脚踏操作。
2
Diaphragm spring has a non-linear characteristic compact, and its high-speed performance is good, stable, lightweight pedaloperation, and is so widely used.
膜片弹簧结构紧凑且具有非线性特性，高速性能好，工作稳定，踏板操作轻便，因此得到广泛使用。
3
When the opening operation of the startup pedal occurs, the control device stops the drive to the sewing machine motor.