Merrylock MK740DSA - 3-Thread Overlock

27
N
2~4
4.0
3.0 3.0
* 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 upper looper thread lies on the underside
of the fabric;
-Turn the upper looper thread tension dial (green)
to a higher number.
- Or, turn the lower looper thread tension dial (red)
to a lower number.
* When the lower looper thread appears on the top of
the fabric;
-Turn the lower looper thread tension dial (red)
toward a higher number.
-Or, turn the upper looper thread tension dial (green)
to a lower number.
When the needle thread is too loose, turn the needle*
tension dial (yellow or blue) to a higher number.
(2) 3-Thread overlock
Note: * These are suggested tension settings only.
NEEDLE POSITION
SEAM WIDTH FINGER KNOB
STITCH LENGTH
Needle thread
Needle thread
Upper looper thread
Upper looper thread
Topside
Topside
Underside
Underside
Lower looper thread
Lower looper thread
Red
Yellow
Medium
weight
Fabric
Tension Dial
Blue
Green