Thread Tension - Bernina Bernette 56 Instruction Manual

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Thread Tension
Thread tension will affect the quality of your stitches. lt may need to be
adjusted when you change fabric or thread type .
NOTE:
It is recommended that a test sample be made on a fabric scrap before
sewing on your project.
The.basic thread tension setting is "5" .
Possible Problems and How To Correct Them
A Upper tension is too tight .
locks appear on the surface of the fabric .
A~ 1 Upper tension cOntrol dial
Decrease the tension by turning the dial to a lower number.
B Upper tension is too loose.
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locks appear on the reverse side of the fabric .
B~ 1 Upper tension control dial
Increase the tension by turning the dial to a higher number .
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NOTE:
The lower thread tension has already been adjusted at the factory for
general use. For most sewing applications, no adjustment is needed .
When
sewin~
with thin thread on thin fabrics, the thread tension can-
not be adjusted adequately with the upper tension control diaL There-
fore, tne thread tension must be adjusted according to the procedure
deScribed below .
• c
lower tension is too loose.
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Locks appear on the surface of the fabric.
Decrease the thread tension by turning the dial to a lower number .
If the result is still not satisfactory, then adjust the bobbin thread
tension as explained in
c~
1 .
C-1 Bobbin
Increase the tension in the bobbin by turning the screw with a
small screwdriver in a clockwise direction. However, do not turn
the screw more than one full turn,
Remember to return the screw to its original setting before
start~
ing your next project.
• D Correct tension
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Correct tension is important since too much orloo little tension
will weaken your seams or cause puckers in your fabric.
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