Pfaff 1529 Owner's Manual page 35

Perfect tension
Too high tension
Too low tension
A
Needle thread tension
To get perfect sewing results, the needle
and bobbin thread tensions must be
perfectly tuned to each other. The normal
setting for utility stitches is in the range
of 4-5.
Check the tension with a wide zigzag
stitch. The threads must be interlaced
between the two fabric pieces.
If the needle thread tension is too high
the threads are interlaced above the top
fabric. If the needle thread tension is too
low, the threads are interlaced below the
lower fabric.
The adjustment of the needle thread
tension is described on page 1:15.
Topstitching
Straight stitch G (1546)/E (1536, 1526) can
be sewn using any of 15 various needle
positions in such a way that you can
B
always guide the sewing foot along the
fabric edge for top-stitching work. The
top-stitch needle position is determined
by the needle position dial. If you wish
to top-stitch farther from the fabric edge,
simply guide the fabric along the guide
marks on the needle plate or use the edge
guide (standard accessory No.8). The
edge guide is inserted into hole A and is
secured with xing screw B.
Sewing aid for thick seams
To ensure a consistent feed when
beginning sewing at a thick seam, we
recommend supporting the presser foot
on a piece of fabric of the same height as
the workpiece
Utility stitches and practical sewing 2:3