步进三驱(专利技术)，由一个步进电机控制针距、剪线以及抬压脚功能，实现颠覆式革新。缝制起始/终止端锁小针距线迹，有效缩短留在缝料上的线头长度，防止线头散出。切线机构采用步进马达驱动，结构简单、切线稳定，方便维护。

One drive three(patented technology): A stepping motor controls the stitch length, thread trimming and presser foot lifting functions to achieve subversive innovation. With the function of locking for start and after trimming, effectively shorten the stitch length, prevent off-thread.Adopt step motor to drive , stable,light noise and convenience on maintenance.

双圆刀的新切线机构

New mechanism for double round cutter