Pfaff Automatic 260 Instruction Book page 22

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The bobbin thread tension rarely needs adjusting, except for embroidery when
it
should bc 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 forefing2r and letting the bobbin case hang freely. The tension should be
strona enough to keep the bobbin case from being pulled down by its own
weight. However, as you jerk your hand slightly, the bobbin case should grad
ually slide down
V
The final stitch appearance can be regulated by the upper
tension dial. as follows:
Turn left
g 4 < 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 tension disc for two-needle
work.
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