LK3-B430E Mark II
57
9. TROUBLESHOOTING
9. TROUBLESHOOTING
Problem
Cause
Check
Solution
Page
Work clamp does not
rise.
Link operation is slug-
gish.
Solenoid position
Adjust solenoid pos-
ition.
48
Work clamp operation
is sluggish.
Grease on work clamp
Apply grease to the
sliding part of the work
clamp.
29
Too high work clamp
lift stroke
Distance between work
clamp and needle plate
top
Adjust the height of
the work clamp to 17
mm or less.
43
Improper sliding of
presser plate and
presser arm lever plate
Grease on presser
plate and presser arm
lever plate
Apply grease to the
presser plate and the
presser arm lever plate.
29
Work clamp makes
contact with thread
wiper.
Thread wiper stand-by
position
Adjust the position of
the thread wiper.
43
Improper position of
sensor perceive plate
Sensor perceive plate
position
Adjust the position of
the sensor perceive
plate.
48
Electrical trouble
See #7 work clamp
does not rise" in the
table in 10-12-2.
←
86
Link does not return.
Electrical trouble
See #8 Work clamp
does not lower" in the
table in 10-12-2.
←
86
Improper position of
presser arm lever plate
Distance between work
clamp and needle plate
top
Adjust the work clamp
lift stroke.
43
Thread wiper obstructs
needle
Clearance between
thread wiper and nee-
dle tip
Adjust the height of
the thread wiper
43
Improper position of
thread wiper
Thread wiper position
Adjust the operating
distance of the thread
wiper.
43
Spring
Hook the spring
properly.
Solenoid position
Adjust the solenoid
position
48
Work clamp does not
lower.
Insufficient work clamp
lift stroke.
Improper height of ten-
sion stud
Height of the tension
stud
Adjust the height of
the tension stud.
Lower thread is wound
to one side
Improper position of
bobbin presser
Wound lower thread
amount.
Adjust the height of
the bobbin presser.
Insufficient lower
thread wound
Improper thread wiper
operation
