SINGER W ET 10 - Manual (Page 16)

STRAIGHT STITCHING
Fabric
puckers
ADJUSTING TOP THREAD
TENSION
Straight Stitching
The good appearance of your stitching is
largely dependent on the balanced tension of
top and bobbin threads. The tension is well
balanced when these two threads lock in the
middle of layers of fabric. You can adjust the
tension of the top thread with the thread
tension control. If the top thread is too tight,
turn this control away from you to reduce the
tension. If the top thread is too loose, turn it
towards you to increase the tension.
Zig-zag Stitching
The top thread may appear on the underside
of the fabric depending upon the thread,
fabric, type of stitch and sewing speed, but
the bobbin thread must NEVER appear on the
top of the fabric.
ADJUSTING BOBBIN THREAD
TENSION
It the straight stitches do not appear satisfac­
tory, adjust the tension of top thread, as bobbin
thread tension requires adjustment less fre­
quently than the top thread tension.
If the tension looks well balanced, but the
fabric puckers badly, both top and bobbin
thread tensions have to be adjusted.
To check and see if the bobbin thread tension
is correct, suspend the bobbin case by the
thread and jerk it once. The correct bobbin
tension will result in the thread unwinding
only
1 inch.
Use a screwdriver to adjust tension on the
bobbin case.