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III. MAINTENANCE OF SAWING MACHINE
1. Maintenance of the sewing machine head
1-1. Adjusting the height of the needle bar (Changing the length of the needle)
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
*
Turn ON the power once, and turn OFF the power again after making the intermediate presser
in the lowered state.
Bring needle bar ❶ down to the lowest position of its stroke. Loosen needle bar connection screw ❷
and adjust so that the upper marker line ❸ engraved on the needle bar aligns with the bottom end of
the needle bar bushing lower ❹ .
After the completion of adjustment, turn the hand pulley to check to make sure that there
is no torque irregularity.
1-2. Adjusting the needle-to-shuttle relation
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
❶
❷
❶
❹
❸
❷
❻
❺
❹
❺
❺ : Marker line for DP×17 (with
needle count lower than #22)
*
Turn ON the power once, and turn OFF the
power again after making the intermediate
presser in the lowered state.
Loosen setscrews ❶ (right and left). Draw out
1)
oil shield ❷ toward you to remove it.
Loosen hinge screw ❸ . Detach thread trim-
2)
ming lever asm. ❹ .
Loosen four setscrews ❺ . Detach throat
3)
plate asm. ❻ .
– 132 –
❸
❶
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