Replacing The Center Motor - JUKI KE-3010 Maintenance Manual

5-4. Replacing the CENTER Motor

1) Detach the connector of the motor relay cable.
2) Loosen the screw
the drive belt C from the motor pulley
3) Loosen the motor fixing screw
4) Mount the motor shaft and motor pulley
pulley end A is aligned with the motor shaft end B. (See
Figure 5-4-1.)
5) When installing a new CENTER motor, reassemble the
components in the order of steps 3) to 1).
6) Adjust the tension of the drive belt C as described
below.
<Procedure>
Loosen the screw
Loosen the motor fixing screw
Adjust the belt tension as described at steps
contact with other components.
Measure the tension using a sonic belt tension meter (manufactured by UNITTA) and adjust it
to between 17.6 and 21.6N.
(Weight=2.5, Width=6.0, Span=93)
After the belt tension has been adjusted, tighten the screws
C and motor, respectively.
Belt (tension) is stretched excessively. → Torque of the drive shaft increases.
Note)
Belt (tension) is loosened excessively. → Teeth on the timing pulley are skipped.
Note)
Maintenance Guide
of the motor bracket
.
to detach the motor
of the motor bracket C, and move the motor bracket to the left and right.
and move the CENTER motor
Figure 5-4-2
5-4
to detach
.
so that the
and . When adjusting, take care not to allow
and
(Noise is produced.)
Rev. 2.0
Figure 5-4-1
up and down.
to fix the motor bracket