Merrylock MK 4055, Instruction Book

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Orange
29
* Open the looper cover and remove all the lint
using the lint brush.
* Close the looper cover and wipe the exterior
surface of your machine with a soft cloth to
remove any dust or lint built up.
(1) CLEANING
23. MACHINE MAINTENANCE
Turn off the main power switch and unplug
the machine.
Seam Width Finger Knob
Stitch Length
Driving Clutch Position
N~4
C
R
(4) COVER STITCH, TRIPLE
(4) Cover Stitch, Triple * Stitch length for cover stitch should be set at over
(2.5 mm).
* Set auto tension dial to J shown at right and test
sew on a sample of your fabric.
* When the cover stitch looper thread is too loose :
- Turn the cover stitch looper thread tension fine
tuning lever (brown) toward a higher position.
* When the cover stitch left needle thread tension is
too loose :
- Turn the cover stitch left needle thread tension fine
tuning lever (orange) toward a higher position.
- Or, turn cover stitch looper thread tension fine
tuning lever (brown) toward a lower position.
* When the cover stitch middle needle thread
tension is too loose :
- Turn the cover stitch middle needle thread tension
fine tuning lever (blue) toward a higher position.
- Or, turn cover stitch looper thread tension fine
tuning lever (brown) toward a lower position.
* When the cover stitch right needle thread tension
is too loose :
- Turn the cover stitch right needle thread tension
fine tuning lever (green) toward a higher position.
- Or, turn the cover stitch looper thread tension fine
tuning lever (brown) toward a lower position.
* When the top surface of fabric bulges between
needle threads and the seams on the underside
of the fabric becomes tight :
- Turn the cover stitch looper thread tension fine
tuning lever (brown) toward a lower position.
Polyester
Cover stitch
looper thread
Blue Green Brown
Wooly nylon
Cover stitch right needle thread
Underside
Chain looper thread
Cover stitch left
needle thread
Topside
Cover stitch middle
needle thread
NEEDLE POSITION
Tension Dial ATD: J