WARNING
To avoid possible personal injury due to abrupt start of the machine, turn off the power to the
machine and check to be sure that the motor has totally stopped rotating in prior.
If the clearance between the blade point of hook and the needle is smaller than the specified value,
the blade point of hook will be damaged. If the clearance is larger, stitch skipping will result.
18. NEEDLE-TO-HOOK RELATIONSHIP
(1)
Adjust the timing between the needle and the hook as follows:
1)
Turn the hand wheel to bright the needle bar down to the lowest point of its stroke, loosen setscrew 1, (adjusting the
needle bar height)
(Adjusting the needle bar height)
2)
(For a DB needle) Align marker line A on needle bar 2 with the bottom end of needle bar lower bushing 3, then tighten
setscrew 1.
(For a DA needle) Align marker line C on needle bar 2 with the bottom end of needle bar lower bushing 3, then tighten
setscrew 1.
(Adjusting position of the hook a)
3)
(For a DB needle) Loosen the three hook setscrews, turn the hand wheel and align marker line B on ascending needle
bar with the bottom end of needle bar lower bushing 3.
(For a DA needle) Loosen the three hook setscrews, turn the hand wheel and align marker line D on ascending needle
bar with the bottom end of needle bar lower bushing 3.
4)
After making the adjustments mentioned in the above steps, align hook blade point 5 with the center of needle 4.
Provide a clearance of 0.04 mm to 0.1 mm (reference value) between the needle and the hook then securely tighten
setscrews in the hook.
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