Pfaff 18 Owner's Manual - Page 7

III Fig. 13 / / ( Regulating the Thread Tensions If the tensions ore not bolanced cor rectly, imperfect stitching will result, os illustrated in Fig. 12. - Upper tension too loose or lower tension too tight. II - Upper tension too tight or lower tension too loose. Ill - Both tensions balonced correctly. Upper Tension For ordinary sewing, the upper tension should be set between 4 ond 6 on the tension dial (Fig. 13). To increase the tension, turn the tension knob toward +, and to decrease the tension, to ward -. Lower Tension The lower tensjon is regulated by the small screw shown in Fig. 14. To in crease the tension, turn this screw clockwise, and to decrease it, counter clockwise, using a small screwdriver for this purpose. '/1-):l*)\ N Fig. 14 11