Stretch sewing machine slips thick material running
In the needle and the machine is accurate, the needle appears when the needle is not on the line, it should consider the line of the problem
Normal stretch sewing, the device began to needle when the needle is at the same time on the line, but sometimes there will be a long needle in the needle when the line is not on the line, and sometimes several centimeters are not on the line.
and sometimes manufacturers of wire twist relatively large, the formation of the ring on the instability.
