JUKI MS-3580 Serie Manual De Instrucciones página 124

Trouble (1) Trouble (2)
From the previous page
5-4) Sewing jam
5-5) Problems with
chain-off thread
Cause (1)
4-A) Regulating A-1) Insuffi cient
spring of presser
bar pressure
B-1) Extremely low
4-B) Feeder height
4-C) Pressure C-1) Insuffi cient
regulating
spring of upper
feed roller
C-2) The brake spring
4-D) Upper feed roller D-1) Insuffi cient
D-2) The gear and
E-1) The cap screw
4-E) Play in the
presser foot
A-1) Not smooth thread
5-A) Throat plate
B-1) Lower fancy stitch
5-B) Lower looper
adjustment
5-C) Needle thread C-1) Insuffi cient needle
tension
5-D) Threading D-1) Threading error
5-E) Drawing amount E-1) The thread
of upper feed
roller
5-F) Clearance F-1) Clearance is too
toward the
upper feed
roller
5-G) Pressure G-1) Insuffi cient
regulating
spring of upper
feed roller
− 52 −
Cause (2) Check and corrective measures
Adjust the presser bar
presser bar
pressure properly.
pressure
Make the feeder height proper.
feeder
Refer to the standard
adjustment values.
Adjust it to an appropriate value.
pressure
Refer to "Adjustment of drawing
adjustment
amount of upper feed roller."
Change the brake spring
(Part No.: 40068599) with a
is permanently
new one.
set in fatigue.
Adjust the drawing amount
drawing amount
properly.
Change the gear (Part No.:
key have worn 40068562/40068563) with
out. a new one.
Change the key (Part No.:
40068560) with a new one.
Change the cap screw (Part
has deformed,
No.: 40070193) with a new
causing an
one.
inconsistent
pressure of the
presser foot.
Perform modifi cation or
running due to blunt
replace the deformed part.
throat needle hole
Refer to the adjustment
skipping due to
values.
insuffi cient lower
looper adjustment
Increase the thread tension.
thread tension
Refer to "#- 5. How to
conduct threading".
Increase the thread drawing
drawing amount amount.
is insuffi cient. Refer to the adjustment values.
Adjust the clearance to a
much between the standard level.
upper feed roller Refer to the adjustment
and the upper face values.
of the throat plate.
Adjust the presser bar
pressure presspring sure properly.
adjustment