JUKI MF-7900 Series Engineer's Manual page 179

When the needle moves in
the descending direction.
❼
❽
❸ ❹ ❺ ❻
6. Remaining in the needle-bar upper
stop position setting mode, turn the
hand pulley of the machine head
by hand to lower the needle ❼ until
the position where its tip is aligned
with the center of the looper ❽ is
reached. Keeping the needle at that
position, take a note of the numeric
value shown on display section Ⓑ .
It is necessary to take a note of the
numeric value shown on display
section Ⓑ since it is used for "(9)
Setting the raveling prevention pa-
rameter".
(Caution) If you press
(Caution) The direction of rotation is
Ⓑ
– 165 –
switch ❻
in this state, the upper stop
position of the needle bar is
set again. To prevent this,
be sure to turn off the power
once without pressing any
switch.
clockwise. If the pulley is
turned counterclockwise,
the degree of the aforemen-
tioned angle can differ by
approximately two degrees.