Brother PC-420 - Manual (Page 60)

SEWING BASICS ———————————————————————————————————————————————————
54
GETTING READ
Y
CONTENTS
SEWING BASICS
U
T
IL
IT
Y
S
T
ITCHES
APPENDIX
INDEX
Adjusting the Thread Tension
The tensions of the upper thread and of the bobbin thread (thread tension) should be adjusted so that they are
equal.
Changing the tension of the
upper thread
If the thread and needle combination is correct for
the type of fabric being sewn (according to “Needle
types and their uses” on page 33), the thread tension
will automatically be adjusted to the appropriate
setting. However, if the preset thread tension does
not give the desired result or if you are sewing with
special thread or on special fabric, use the thread
tension dial under the upper cover to adjust the
tension of the upper thread.
■ Correct thread tension
The upper thread and the bobbin thread should
cross near the center of the fabric. Only the upper
thread should be visible from the right side of the
fabric, and only the bobbin thread should be
visible from the wrong side of the fabric.
1 Wrong side of fabric
2 Right side of fabric
3 Upper thread
4 Bobbin thread
■ Upper thread is too tight
If the bobbin thread is visible from the right side
of the fabric, the upper thread is too tight.
1 Wrong side of fabric
2 Right side of fabric
3 Upper thread
4 Bobbin thread
5 The bobbin thread is visible from the right side of
the fabric.
Turn the thread tension dial to the left to loosen
the upper thread.
■ Upper thread is too loose
If the upper thread is visible from the wrong side
of the fabric, the upper thread is too loose.
1 Wrong side of fabric
2 Right side of fabric
3 Upper thread
4 Bobbin thread
5 The upper thread is visible from the wrong side of
the fabric.
Turn the thread tension dial to the right to tighten
the upper thread.
1
2
3
4
1
2
3
4
5
5
1
2
3
4