Brother XR3774 Operating Guide

SEWING BASICS

—

CAUTION

Thread tension

The tension of the thread will affect the quality of your
stitches. You may need to adjust it when you change
fabric or thread.

Memo

● We recommend that you do a test sample

on scrap of a fabric before you start to sew.

■ Correct tension

Correct tension is important as too much or too little
tension will weaken your seams or cause puckers
on your fabric.

■ Upper tension is too tight

Loops will appear on the surface of the fabric.

Note

● If the bobbin thread was incorrectly

threaded, the upper thread may be too tight.
In this case, refer to “Lower threading” on
page 17 and rethread the bobbin thread.

Solution
Reduce the tension by turning the upper tension
control dial to a lower number.

■ Upper tension is too loose

Loops appear on the back of the fabric.

Note

● If the upper thread was incorrectly threaded,

the upper thread may be too loose. In this
case, refer to “Upper threading” on page 19
and rethread the upper thread.

Solution
Increase the tension by turning the upper tension
control dial to a higher number.

●

When changing the sewing direction, be
sure to raise the needle from the fabric,
and then raise the presser foot lever and
turn the fabric. Otherwise the needle may
break or the machine may be damaged.

1 Surface of fabric
2 Back of fabric
3 Upper thread
4 Lower thread

1 Surface of fabric
2 Back of fabric
3 Upper thread
4 Lower thread
5 Loops appear on

surface of fabric

1 Surface of fabric
2 Back of fabric
3 Upper thread
4 Lower thread
5 Loops appear on back

of fabric