– 13 –
1) Loosen the setscrew of upper looper ball arm
and setscrew
of
the upper looper holder.
2) Adjust the clearances between upper looper bracket
and upper
looper holder
to approximately 0.2 mm respectively, and tighten
setscrew
of the upper looper holder.
(Make sure that the upper looper holder smoothly moves together
with upper looper shaft
.)
3) Then determine dimension
F
from the bottom surface of the frame to
the top surface of upper looper holder pin
before tightening the
setscrew of upper looper ball arm
.
(Caution) Replace upper looper holder
according to the needle
gauge size.
o Inaccurately positioned upper
l o o p e r h o l d e r w i l l c a u s e
excessive projection of the upper
l o o p e r , r e s u l t i n g i n s t i t c h
skipping, or contact.
(Caution) To adjust the upper
looper ball arm, take
dimension
F
F
F
F
F
as stan-
dard.
Remember that the
projecting amount
and the height of the
upper looper should
eventually be prop-
erly adjusted. So,
confirm the dimen-
sions related to the
upper looper.
Adjustment Procedure
Results of Improper Adjustment
Содержание MO-6700D Series
Страница 49: ...45 2 Upper looper components...
