– 5 –
*
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 sufciently warmed up for operation, make the machine run idle for ap-
proximately three minutes. (Moderate intermittent operation)
2) Place the amount of oil (oil splashes) conrmation paper under the hook while the sewing machine is
in operation.
3) Conrm the height of the oil surface in the oil reservoir is within the range between “HIGH” and “LOW”.
4) Conrmation of the amount of oil should be completed in ve seconds. (Check the period of time with
a watch.)
1
Amount of oil (oil splashes) conrmation paper
2
Position to conrm the amount of oil (oil splashes)
* Use any paper available regardless of the material.
* Place the amount of oil (oil splashes) conrmation
paper under the hook.
7. ADJUSTING THE AMOUNT OF OIL (OIL SPLASHES) IN THE HOOK
Closely f i t t h e
p a p e r a g a i n s t
the wall surface
of the bed.
Hook
Hook driving shaft front bushing
Bed
Oil splashes
conrmation paper
3 to 10 mm
Approx. 25 mm
Approx. 70 mm
■
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 sewing 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).
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.
Appropriate amount of oil
(large)
Splashes of oil from the hook
Approx.2 mm
Splashes of oil from the hook
Appropriate amount of oil
(small)
Approx.1 mm
(
DDL-8100eH
:
1 mm
)
(
DDL-8100eH
:
3 mm
)