Operation Manual

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Sample showing the appropriate amount of oil
1) The amount of oil shown in the samples on the
left should be nely adjusted in accordance with
sewing processes.
Be careful not to excessively increase/decrease
the amount of oil in the hook. (If the amount of oil
is too small, the hook will be seized (the hook will
be hot). If the amount of oil is too much, the sew-
ing product may be stained with oil.)
2) Adjust the amount of oil in the hook so that the
oil amount (oil splashes) should not change while
checking the oil amount three times (on the three
sheets of paper).
7. ADJUSTING THE AMOUNT OF OIL (OIL SPLASHES) IN THE HOOK
1
Amount of oil (oil splashes) conrmation paper
2
Position to conrm the amount of oil (oil splashes)
Closely t the paper against the wall
surface of the bed.
Oil splashes conrmation paper
3 - 10 mm
25 mm
70 mm
* When carrying out the procedure described below in 2, remove the slide plate and take extreme cau-
tion not to allow your ngers to come in contact with the hook.
1) If the machine has not been sufciently warmed up for operation, make the machine run idle for ap-
proximately three minutes. (Moderate intermittent operation)
2) Place the amount of oil (oil spots) conrmation paper under the hook immediately after the machine
stops running.
3) Conrm the height of the oil surface in the oil reservoir is within the range between “HIGH” and “LOW”.
4) Conrmation of the amount of oil should be completed in ve seconds. (Check the period of time with
a watch.)
Appropriate amount of oil (large)
1mm
2mm
Appropriate amount of oil (small)
Splashes of oil from the hook
Splashes of oil from the hook
DDL-8700A : 0.5 mm
DDL-8700H,
DDL-8700L : 1 mm
DDL-8700A : 1 mm
DDL-8700H,
DDL-8700L : 3 mm
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Adjusting the amount of oil (oil spots) in the hook
1) Turning the oil amount adjustment screw attached
on the hook driving shaft front bushing in the “+”
direction (in direction
A
) will increase the amount
of oil (oil spots) in the hook, or in the “–” direction
(in direction
B
) will decrease it.
2) After the amount of oil in the hook has been
properly adjusted with the oil amount adjustment
screw, make the sewing machine run idle for ap-
proximately 30 seconds to check the amount of
oil in the hook.
A
B
WARNING :
Be extremely careful about the operation of the machine since the amount of oil has to be checked
by turning the hook at a high speed.