Merrylock MK740DSA - 3-Thread Flatlock

N
2~4
28
5.00.0 8.0
NEEDLE POSITION
SEAM WIDTH FINGER KNOB
STITCH LENGTH
Red
Yellow
Medium
weight
Fabric
Tension Dial
Blue
Green
* 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 (red)
toward a higher number.
- Or, turn the needle thread tension dial
(yellow or blue) toward a lower number.
* When the upper looper thread tension is too loose;
- Turn the upper looper thread tension dial (green)
toward a higher number.
- Or, turn the needle thread tension dial
(yellow or blue) toward a lower number.
* When the needle thread tension is too loose;
- Turn the needle thread tension dial (yellow or blue)
toward a higher number.
-Or, turn the upper looper thread tension dial
(green) toward a lower number.
(3) 3-Thread flatlock
Note: * These are suggested tension settings only.
Upper looper thread
Upper looper thread
Needle thread
Needle thread
Topside
Topside
Underside
Underside
Lower looper
thread
Lower looper
thread