Pfaff hobbylock 2.5 Owner's Manual - Page 25

Differential feed adjustment The differential feed system consists of two sets of feed teeth arranged one behind the other. Both feed teeth work independently of each other to give perfect results when sewing on speciality fabrics. When the amount of feed by the front feed teeth is changed in relation to the feed by the rear feed teeth it will "stretch" or "gather" the fabric. Use the differential feed to prevent stretching of knit fabrics and puckering of lightweight fabrics. For overlock stitching on normal fabric, set the differential feed adjusting dial to 1.0. Gathered overlock (stretch, knit fabrics) When overedging stretch fabric, such as knits and jersey, adjust the differential feed to a value between 1.0 and 2.0. The setting depends on the material being sewn as well as the desired amount of gathering. Test sew with different settings before sewing on your garment. Stretch overlock (lightweight fabrics) When overedging light woven or loosely knit fabrics, such as silk and silky knitwear, adjust the differential feed to a value between 0.6 and 1.0. When sewing, apply gentle tension to the fabric by holding the seam lightly in front and back of the presser foot. The setting depends on the material being sewn as well as the desired amount of stretching. Test sew with different settings before sewing on your garment. Fabric Stretch fabric (Knit, jersey) Differential feed 1.0 Adjustment 1.0 - 2.0 Result Non-stretch fabric 1.0 (Chino, denim) Lightweight fabric (Silk, silky knitwear) 0.6 - 1.0 Stitch adjustments 25