Jack brand new patent for bottom thread clamping, effectively reduce the probability of thread-off while starting sewing
The height of the presser foot can be adjusted within the range of 0-13mm basing on the thickness of the fabric, saving time and convenience.
stitch length can reach 0.1mm controlled by stepping motor. Stitch length adjustment function can be locked just in case operator's mis-operation.
The height of the presser foot can be adjusted within the range of 0-13mm basing on the thickness of the fabric, saving time and convenience.
