JUKI DDL-555-4 - Page 37

Troubles
Causes
Corrective measures
Page
5) Tension of the thread take-up
spring is not enough.
6)
Thread guide (A) on the arm
is not properly positioned.
7) Bobbin docs not smoothly
spin in the bobbin case.
o Reduce the stroke and
increase the tension of the
take-up spring,
o Move the thread guide (A) up
wards.
o Replace it with an aluminium
bobbin.
16
25
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y
From the library of: Superior Sewing Machine & Supply LLC