Instruction Manual

1 1 LUBRICATION
Five/ten drops of oil for
one oiling are necessary
only in this portion.
As special materials (oil impregnated metal) are
used for parts of this machine actual additional
lubrication is negligible. However, since oil wick
is provided for the inner sections, oil should be
provided no more than once or twice per month
to those parts (6 Positions) marked in red which
can be seen from the outside of the machine, in
addition to those parts (5 Positions) shown in
Figure 49. 1-2 drops of oil is sufficient for one
oiling.
Figure 49
*1 2 CHECKING AND ADJUSTMENT
This machine is so designed that there is abso
lutely no need for complex professional adjust
ments.
The following five examples are the only possible
instances where difficulties are likely to occur
through lack of fundamental adjustments.
These points should be carefully considered
when operating this machine.
A) When the machine does not operate —
Is the electric cord properly inserted into the
plug receptacle?
Is there any slipping in the set position of
the motor?
I s the belt loose?
B) When the thread breaks —
Have the threads been inserted correctly?
Is the thread tension too strong?
Is the needle bent?
Is the presser pressure adequate?
Are there any problems with regard to the
type of thread being used?
Has the needle been inserted correctly?
C) When the needle breaks —
Is the needle touching against the throat
plate or presser foot?
Has the needle been inserted correctly?
D) When the seams are irregular—
Is the needle bent or the point worn?
Has the needle been inserted correctly?
Have the threads been inserted correctly?
Is the presser pressure sufficient?
E) When the seams are not satisfactory —
Is the tension adjustment of the upper and
lower threads satisfactory?
Have the threads been correctly inserted?
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