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SAFETY SWITCH AND ITS FUNCTION
1. Pneumatic
a. Solenoid valve (left side)1: is used to control
the presser foot
lift
and lower movement.
b. Solenoid valve
(middle)2:
is used to control the
operation
of the lower
trimmer. (Including
needle thread
and lower
looper thread.)
c. Solenoid
valve (right side)3:
is used to control
the
operation of the spreader's
thread trimmer
or to drive the air blower. (Please
refer to the
parts list for above information.)
2. Electric
a. Electromagnet (UT534K): is to control the
operation of threads (upper and lower) and
the
mechanism of thread trimming (as shown in the
parts I ist).
b. Electromagnet (UT218J): is used to control the
operation of the top cover thread pulling
system (as shown in the parts list).
c. Electromagnet (Ut776): is used to control the
operation of top cover thread trimmer (as
shown in the parts list).
3. The major function of the safety switch is
to check
and confirm the thread trimmer of needle's
and
lower looper's returning to the origin.
If the
trimmer is not located on the origin,
the motor will
not function at all. (Fig.?)
Note:
(1) Please be sure to turn
off the power switch
before connecting
the wires on the
solenoid valve.
If the power switch is not
turned off,
please notice that the red and
black wires
do not contact. Otherwise, the
contact
will cause short circuit and damage
the
internal circuit (as shown in the parts
list).
(2)
The plug connecting with the motor
controlling box should be plugged fully so
that it contacts well. This will prevent the
malfunction resulting form the loose plug.
mlhA
Pneumatic
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SAFETY SWITCH
SAFETY SWITCH
~7/Fig.?
- 1 1 -
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