3-Thread Flatlock - Singer HD0400S Instructions

4) 3-thread Flatlock

Note: * These are suggested tension settings only.
* Tension settings are effected by;
1) Type and thickness of fabric
2) Needle size
3) Size, type and fiber content of thread
Correct Balance
Set each tension dial to settings shown at right
and test sew on a sample of your fabric
How to Balance
When the lower looper thread tension is too loose;
- Turn the lower looper thread tension dial (yellow)
toward a higher number.
- Or, turn the needle thread tension dial (blue or
green) toward a lower number.
When the upper looper thread tension is too loose;
- Turn the upper looper thread tension dial (orange)
toward a higher number.
- Or, turn the needle thread tension dial (blue or
green) toward a lower number.
When the needle thread tension is too loose;
- Turn the needle thread tension dial (blue or
green) toward a higher number.
- Or, turn the upper looper thread tension dial
(orange) toward a lower number.
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NEEDLE POSITION
SEAM WIDTH FINGER KNOB
STITCH LENGTH
Needle thread
Upper looper
thread
Topside
Fabric
Blau
Light weight
0.5
Medium weight
0.5
Heavy weight
0.5
Fabric
Blau
Light weight
Medium weight
Heavy weight
Needle thread
Upper looper
thread
Topside
Needle thread
Upper looper
thread
Topside
Needle thread
Upper looper
thread
Topside
S
2 - 4
Needle thread
Lower looper
thread
Underside
(505)
Tension Dial
Orange Yellow
Green
5.0 7.0
5.0 7.0
5.0 7.0
Tension Dial
Green Orange Yellow
0.5 5.0 7.0
0.5 5.0 7.0
0.5 5.0 7.0
Needle thread
Lower looper
thread
Underside
Needle thread
Lower looper
thread
Underside
Needle thread
Lower looper
thread
Underside