27
88
Maintenance and repair
[ Caution ]
·
For machine maintenance and repair, consult with qualified technicians.
·
For electrical maintenance and repair, consult with qualified technicians or agencies.
·
When safety devices are disassembled, make sure to return them to original positions.
·
Use both hands when bending the machine backwards or returning it to the original position. Using only one hand can lead
to severe hand injuries due to the weight of the machine.
·
Turn off the switch and pull the plug. Pressing pedal by mistake may result in physical injuries.
·
Inspection, maintenance, repair
·
Exchanging expendable parts such as needle, hook, knife.
·
Adjusting hook oil flow
·
In case you operate the machine when the power is on, please take special precaution.
8-1. Adjusting thread take-up spring
8-1-1. Position of thread take-up spring
It is standard that thread take-up spring
①
is at the place where
the spring’s movement range is 6~8mm from the upper surface
of thread routing plate
③
with presser foot
②
descending. ( A
and G type)
(For B and H type, 4~6mm is standard)
1. Lower presser foot
②
.
2. Loosen fixing screw
④
lightly.
3. Adjusting position by turning thread control device
⑤
.
4. Fasten fixing screw
④
tightly.
8-2. Adjusting right arm thread guide
1. It is standard that clamp screw
②
is placed at the center of
long hole of right arm thread guide
①
.
2. Loosen clamp screw
②
and move right arm thread guide
①
both sides to adjust.
3. In case of heavy material sewing, move right arm thread
guide
①
to the left. (The amount of thread in thread take-up
will increase.)
4. In case of light material sewing, right arm thread guide
①
to
the right. (The amount of thread in thread take-up will
decrease.)
[ Figure 40 ]
[ Figure 41 ]
②
①
③
⑤
④
6~8mm
For light
material
For heavy
material
②
①
Содержание KM-2300
Страница 2: ......
