JUKI LU-2800 Series, Руководство инженера

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WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
Trouble Cause Checking Corrective measures
3. Needle thread trails 2 to 3 cm
from the wrong side of the fabric.
3-1) Needle thread tension is too low. Adjust the needle thread tension. (This trouble
occurs a lot when using synthetic threads.
3-2) Thread take-up spring works exces-
sively or the stroke of the spring is too
small.
Decrease the tension of of the thread take-up
spring and increase the stroke of the spring.
3-3) Feed timing is not proper. Refer to “2.-(8) Feed adjustment”.
3-4) Timing between the needle and the
hook is excessively advanced or
retarded.
4-A) Check the specified dimension. Refer to “2.-(6) Needle-to-hook timing”.
3-5) Thread melts due to needle heat. Decrease the sewing speed.
Use silicon oil.
(Refer to * below.)
3-6) Amount of oil in the hook is exces-
sive.
6-A) Check the amount of oil in the
hook.
Adjust the amount of oil in the hook.
Refer to “2.-(15) Lubrication”.
* Use separately available parts below :
• 21144308 Needle thread lubricator
• B1114012000 Thread guide rod
• B91351230B0 Silicon oiler