JUKI AMB-289, Руководство инженера

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Removing the main motor
1. Fix the main shaft with hand pulley
, and loosen three setscrews
in main motor sprocket .
Loosen two idler setscrews , and remove main motor sprocket .
At this time, fix timing belt with gum-tape or the like while holding
timing belt with sprockets of main shaft and looper shaft so that
timing between main shaft and looper shaft is not changed.
2. Loosen two main motor fixing screws of main motor bearing bush
, and remove main motor bearing bush .
3. Loosen four motor setscrews , remove main motor , and draw
out the connector.
Installing the main motor
1. After adjusting the boss section of main motor
to the hole and
pressing it so that the main motor cord is on the front side, put the
main motor between two main motor installing plates
and four
main motor setscrews , and temporarily tighten the motor.
2. Adjust the flat section of main motor shaft to screw No. 1 of main
motor bearing bush , put main motor bearing bush between
main motor bearing and the main motor shaft, and securely tighten
four main motor setscrews .
3. Pressing main motor bearing bush to main motor bearing ,
loosen main motor shaft fixing screws .
4. Draw out the main motor cord from the slot located on the bottom
face of frame, pass it through the hole of control box under the table,
and insert the connector.
5. Assemble sprockets and , put timing belt , and perform tim-
ing adjustment of main shaft and main motor . "Refer to (1) Disas-
sembling and assembling of the main shaft." Adjust the timing with
the adjustment of main motor sprocket
since the timing between
main shaft and looper shaft is adjusted.
Fixing procedure of the main shaft
1. Remove three setscrews
A
, and remove top cover .
2. Adjust the main shaft to the upper dead point.
3. Setscrew
B
is used for fixing the main shaft using setscrew
B
for
fixing bottom feed unit (plate support ).
4. This setscrew
B
is the screw for fixing the bottom feed unit at the
time of delivery from factory and transportation. It is the screw which
is removed and not used at the time of sewing.
5. Press down hand pulley , install setscrew
B
to hand pulley install-
ing base , and fix the hand pulley.
6. When releasing the fixing, remove setscrew
B
.
Procedures of disassembling / assembling Caution in disassembling / assembling