20 GB/IE
Material Thread tension
blue green orange yellow
Heavy 3.5 3.0 3.0
Material Thread tension
blue green orange yellow
Light 2.5 3.0 3.0
Medium 3.0 3.0 3.0
Heavy 3.5 3.0 3.0
Adjusting the thread tension
If the upper looper thread is visible on the reverse of the material, then
– set the dial for the upper looper thread tension (orange) to a higher
value or
– set the dial for the lower looper thread tension (yellow) to a lower
value.
If the lower looper thread is visible on the face side of the material, then
– set the dial for the lower looper thread tension (yellow) to a higher
value or
– set the dial for the upper looper thread tension (orange) to a lower
value.
If the upper thread is too loose, set the dial for the upper looper thread
tension (green or blue) to a higher value.
Needle thread
Right side Left side
Lower looper
thread
Upper looper
thread
Needle thread Needle thread
Right side Right side
Left side Left side
Lower looper
thread
Upper looper
thread
Upper looper
thread
Lower looper
thread
3-Thread flatlock seam
Note: The following information is merely a guide.
Tension settings depend on:
1) Type and thickness of the work piece
2) Needle size
3) Thickness, type and material composition of the thread
Needle position
Seam width finger switch S
Stitch length 2–4
Upper looper
thread
Right side Left side
Needle thread
Lower looper
thread
Needle thread
Correct adjustment
Set the adjustment wheels for the thread tensions to the following values
and sew a sample seam on the material you will be sewing.
Material Thread tension
blue green orange yellow
Light 0.5 5.0 7.0
Medium 0.5 5.0 7.0
Heavy 0.5 5.0 7.0
Material Thread tension
blue green orange yellow
Light 0.5 5.0 7.0
Medium 0.5 5.0 7.0
Heavy 0.5 5.0 7.0
Adjusting the thread tension
If the lower looper thread is too loose, then
– set the dial for the lower looper thread tension (yellow) to a higher
value or
– set the dial for the upper thread tension (blue or green) to a lower
value.
If the upper looper thread is too loosen, then
– set the dial for the upper thread tension (orange) to a higher value or
– set the dial for the upper thread tension (blue or green) to a lower
value.
If the upper thread is too loose, then
– set the dial for the upper thread tension (blue or green) to a higher
value or
– set the dial for the upper thread tension (orange) to a lower value.
Needle thread
Right side Left side
Lower looper
thread
Needle thread
Upper looper
thread
Needle thread
Right side Right side
Left side Left side
Lower looper
thread
Upper looper
thread
Upper looper
thread
Lower looper
thread
Needle thread
Needle thread Needle thread
347907_BE 20 24-Apr-2020