Thread Tension
Adjustment
The correct combination of thread tension (
34
) results in
a stitch that looks identical on both sides of the material
(i�e�, the knots of the stitches are pulled into the application
and are no more visible on the top than on the bottom)�
If knots are visible on both the top and bottom
material surfaces, this is an indication that the thread
size is too large for the material being sewn�
The upper tension knob (
35
) can be loosened or tightened to
adjust tension� Rotating the knob clockwise or toward the “+”
will increase upper tension, pulling the knot to the top of the
sewn application (
37
)� Rotating the knob counterclockwise
or toward the “-” will decrease upper tension, allowing the
knot to be pulled to the bottom of the sewn application (
38
)�
DO NOT
lift the presser foot when the upper tension knob is
less than a 1/2 turn from maximum (turned snugly clockwise)
(
36
). This amount of tension should never be required.
If upper tension is tightened all the way down,
raising the presser foot may bend the lever
inside the machine that separates the disks,
preventing the disks from opening correctly�
Knots centered — PERFECT STITCH
35
36
34
NOTE: Decorative cap removed
(Excessive tension shown)�
Knots visible on bottom
Knots pulled to top
37
38
Advanced Thread
Tension Adjustment
Before moving on, please reference p� 4
to ensure proper needle and thread size
are being used for your application�
Tension changes to the bobbin thread should only be
made when upper tension changes alone do not solve
stitch tension. In general, bobbin tension requires
just about a 2-ounce drag on the thread (similar to
what you feel when pulling dental floss off a spool).
If knots are pulled to the top (
37
) and you can’t
loosen the upper tension knob (
35
) any more,
remove the bobbin case from the machine and
increase the bobbin case tension by tightening
the tension adjustment screw (
A
)� Tighten in 1/4
increments, testing the drag on the thread after
each 1/4 turn until proper tension is achieved�
If the knots are pulled to the bottom (
38
) and you
can’t tighten the upper tension knob (
35
) any more,
remove the bobbin case from the machine and
decrease the bobbin case tension by loosening
the tension adjustment screw (
B
)� Loosen in 1/4
increments, testing the drag on the thread after
each 1/4 turn until proper tension is achieved�
Scan to watch a video on
how to adjust stitch tension�
Full Rotation: Normal Adjustment
Half Rotation: Minor Adjustment
B
A
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