The solution to the wrinkling of the fabric during the sewing of the overlock sewing machine

In general, wrinkling is easy to occur when sewing slippery fabrics. Due to the excessively small feed ratio, the bottom surface of the presser foot and the plane of the feed dog are uneven; adjust the differential wrench to the 0 position below until it is flat, and adjust the pressure Foot position; a similar situation often occurs when sewing elastic fabrics. Due to the difference in the surplus ratio during sewing, the elongation and shortening cause the fabric to wrinkle. Move the differential wrench up and down to the "0" position, until the seam is flat.