Pfaff 360 Owner's Manual - Page 19

R 8150 Ccea.t 7n.cicn 9 tdatj,n Balanced tensions are essential for sewing. have perfect seams as sketched below (III). If your tension is correct, you will Sketch I - The threads interlock on the underside of the fabric. Cause: Upper tension too loose or lower tension too tight. Sketch II - The threads interlock on the surface of the fabric. Cause: Upper tension too tight or lower tension too loose. 'V A To check whether the tensions are correctly bol anced, take a closely woven piece of fabric and sew a few straight and zigzag seams. If the straight stitches are tightly drawn in on bath sides of the fabric (see seam sketch III), the tensions are correct. The surest way to double-check this is by examining a zigzag seam. If the zigzag seam is equally wide on surface and underside of the fabric, that is, if the threads are locked exactly at the zigs and zags of the seam, the tension adjust ment is correct. 18