Trial sewing
Thread tension dial
After threading, make a sample stitch.
Be sure to use a double layer of fabric in order to check whether the
seam and thread tension for correctness.
Chainstitch sewing test:
(1) Set the thread tension dials.
(2) Lower the upper knife, depending on stitch choice.
(3) Lower the presser foot.
(4) When starting to sew chainstitch, place the fabric under the presser foot
(chainstitch can only be sewn in fabric). Sew.
(5) At the end of the seam, conftinue sewing to form a 5 to 6 cm long thread
chain.
(6) Holding the fabric with one hand, pull the thread chain over the thread
cutter on the presser foot shank.
Overlock sewing test:
(1) Set the thread tension dials.
(2) Make sure that the upper knife is lowered, (in the cutting position).
(3) Lower the presser foot.
(4) Raise the tip of the presser foot with your thumb and place the fabric
under the foot up to the knife. Let go of the foot and sew.
(5) At the end of the seam, continue sewing to form a 5 to 6 cm long thread
chain.
(6) Holding the fabric with one hand, pull the thread chain over the thread
cutter on the presser foot shank.
5
4
3
2
1
9
8
7
6
D
A
B
C
33
5
4
3
2
1
9
8
7
6
D
A
B
C
33
Increase
Decrease
Adjusting the thread tension
Imperfect stitch formation can be corrected by adjusting the set value (1
to 9) on the thread tension dial.
Adjusting thread tension dial
Standard of the thread
tensioner dial
A
Upper looper thread tension
3 - 5
B
Lower looper thread tension
3 - 5
C
Right-hand needle thread tension
3 - 5
Left-hand needle thread tension (for
chainstitch and wide 3-thread over-
lock)
6 - 7
D
Chainstitch needle thread tension
2.5 - 4.5
Left-hand needle thread tension
3 - 5
* When using filament thread or wooly nylon thread, adjust the thread
tension accordingly.
31
