JUKI MF-7800D Series, Руководство инженера

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3. Synchronizer adjustments
1) Loosen screw and remove cover .
2) Turn disk on this side by hand, and adjust the
adjusting mark “B” of disk in the rear to edge
A
of disk .
3) Temporarily tighten the synchronizer to the lower
main shaft handwheel with screw
.
4) When the power is turned ON, the sewing machine
turns approximately by one half and stops.
5) Turn OFF the power, and loosen screw .
6) Holding section
B
of the synchronizer so as not to
move, turn the upper main shaft handwheel, and
temporarily tighten screw in the position where
mark of the handwheel is adjusted to mark on
the machine head side.
7) Turn ON the power again and make sure that the
sewing machine stops where mark of the
handwheel is apart from mark on the machine
head side. Then tighten screw .
8) After the adjustment, be sure to attach cover and
tighten screw .
9) After the adjustment above has been performed,
when the sewing machine stops at the DOWN posi-
tion, top end
C
of the looper is located at the posi-
tion where it has scooped loop
D
of left needle
thread as shown in the figure.
(Caution) When using the synchronizer as UP/
DOWN stop position type without using
the thread trimmer device, change the
setting of the function setting No. 74 to
“1 (thread trimming )
→ →
→ → → 0 (UP/DOWN po-
sition)”. (Setting procedure of both SC-
500 and SC-510 is common.) Thread trim-
mer safety device error occurs unless the
setting is changed, and it is impossible
to operate the sewing machine. So, be
careful.
WARNING :
To protect against possible injury to hands or fingers due to abrupt start of the machine during performing
adjustment, perform the adjustment of the stop position under the function setting mode.
The synchronizer can be adjusted in the procedures specified below.
A
D
C
B