Drawing Up The Bobbin Thread; Regulating The Thread Tensions; Adjusting The Upper Tension - Pfaff 145 Instruction Book

9. Drawing Up the Bobbin Thread
Hold the end of the needle thread and turn the balance wheel toward you, as indicated
by an arrow in Fig. 1, until the needle moves down and up again. As the needle moves
up, it catches the bobbin thread which comes up with it through the needle hole. Lay
both threads back under the presser foot, place the material in the machine and lower
the presser foot. Hold the ends of both threads until the machine has made a few
stitches.
10. Regulating the Thread Tensions
Adjusting the Upper Tension
Turn tension nut M (Fig. 8) clockwise for more tension, or counter-clockwise for less
tension.
If the upper tension is too loose, the bobbin thread will draw the needle thread down
so that it forms small kinks on the underside of the material, as shown in Fig. 9.
If the upper tension is too tight, the bobbin thread will be pulled up (Fig. 10) or the
needle thread will break.
Both tensions are correctly balanced, if the needle and bobbin threads interlock in the
center of the material, as shown in Fig. 11.
Fig. 9
Fig. 10
Fig. 11
When you raise the presser bar, the upper tension is released automatically so that the
work can be easily removed from the machine. To do this, pull the work back (in for
ward feeding direction), never forward as this may cause bending of the needle, skipping
of stitches or thread breaking.
Upper tension too loose or lower tension too tight
Upper tension too tight or lower tension too loose
Both tensions properly balanced
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