JUKI MF-7900 Instruction Manual page 13

When the needle
moves in the
descending
direction
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 until the position
where its tip is aligned with the center of the looper
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
is used for "X. SETTING THE RAVELING PRE-
VENTION PARAMETER"
If you press
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.
Ⓑ
– 11 –
Ⓑ
p.12".
switch ❻ in this state, the
The direction of rotation is clock-
wise. If the pulley is turned coun-
terclockwise, the degree of the
aforementioned angle can differ
by approximately two degrees.
since it