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The number of stitches can be set at any value between 54 and 345 simply by changing the spur gears. The improved throat plate base, tension release cam, and feed cam will be able to sew the better button holing.
The safety device can prevent the thread trimming accidentally falling from the trimmer. If the threads need to be trimmed during sewing, this device can protect the trimmer from falling. By this way, the parts will not be dameged in any step of the process. If the fabric is not trimmed after finishing sewing, the trimmer will not fall by pressing the trimming stop lever.
Auto-single-pedal device ─ This new unit is added with an auto device. You can start or stop the motion of button holing by only pressing this single pedal. Through the control of the auto device, the working clamp will automatically move up and down. On the other hand, this device can allow one operator to operate two sewing machines.