Pfaff 259 Owner's Manual - Page 20

7qutaeIF19 th '7.4e4? '7.€nsit,n The bobbin thread tension rarely needs adjusting, except for embroidery when it should be a little tighter than for ordinary sewing. Adjustment is made by a small knurled screw on the bobbin case which can be turned with the thumb tip. Turn it left -( for looser tension. Turn it right )- for tighter tension. Determine correct bobbin tension by holding the thread end between thumb and forefinger and letting the bobbin case hang freely. The tension should be strong enough to keep the bobbin case from being pulled dawn by its own weight. However, as you jerk your hand slightly, the bobbin case should grad ually slide down. - - -;.-'- R8029 A The final stitch appearance can be regulated by the upper tension dial, as follows: Turn left cE( for looser tension. Turn right for tighter tension. The upper tension is so designed that all grades of ten sion -- loose to tight--can be covered with one complete turn of the tension dial. The numbers on the tension dial indicate different degrees of tension. The higher the num ber, the greater the tension. For ordinary sewing, the upper tension should be set between 3 and 5. Your upper tension has a third disc for two-needle work. 19