Threading Of Bobbin Threads; Adjustment Of Bobbin Threads Tension; Balance Of Threads Tension; Adjustment Of Needle Threads Tension - Mitsubishi Electric LU2-4400-B0B Instruction Manual

HOW TO USE

7 Threading of bobbin threads

( 1 ) Put bobbin thread into the slit ①, pass under
the lug ② and extend it above the bed.
Thread
② Opener
( 2 ) While holding two needle threads with your
left hand, turn the pulley one rotation with
your right hand. The bobbin threads will
come up when needle threads are lifted up
as shown in the figure. Needle threads and
bobbin threads should be aligned and led
backward together.

8 Adjustment of bobbin threads tension

Thread tension screw
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
Thread
①
Loosen Tighten
— 6 —

9 Balance of threads tension

A ○
B ×
C ×

: Adjustment of needle threads tension

● N eedle threads tension should be adjusted on
the basis of bobbin threads tension.
● A djust needle threads tension by turning
thread tension nuts.
Needle threads tension can be also adjusted by
changing intensity and movable range of the
thread take-up spring in case of sewing the
special fabric and thread.
Loosen Tighten

A Adjustment of the presser foot pressure

Adjust the presser foot pressure according to the
fabric by turning the pressure adjusting screw.
Strengthen
Balanced tension
Tight the needle thread tension or
loose the bobbin thread tension
Loose the needle thread tension or
tight the bobbin thread tension
Thread tension nut
Weaken
Pressure adjusting
screw