JUKI SC-905 - Adjusting the Needle-to-Hook Timing and Needle Guard

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(12) Adjusting the needle-to-hook timing and the needle guard
Standard Adjustment
™ Hook adjusting mode
™ Lifting amount of the nedle (bar) : 3.4 mm
™ When the zigzag width is maximized, a distance of
0.2 to 0.5 mm should be provided between the top
end of the needle eyelet and the blade point of the
hook when the needle reaches the leftmost end of
the zigzag stroke.
™ The needle guard :
• has to guard the needle both on the right- and left-
hand sides.
• A clearance of 0 to 0.05 mm should be provided
between the needle and the blade point of the hook
(when the needle reaches the rightmost end of the
zigzag stroke).
Remarks Marker lines engraved on the face plate
™ The needle-to-hook timing is adjusted using the
timing gauge as described above. However, you
can use the marker lines engraved on the face plate
for reference when adjusting it.
™ Be sure to remember that the marker lines are used
only for reference. So, it is recommended to use
the timing gauge for adjusting the needle-to-hook
relation so as to make the most out of many
functions of the LZ-2290 Series models of sewing
machine.
0.2 to 0.5 mm
Woodruff plate
Or,
Fig. 1
Fit the blade point of the
hook onto the indented
part of the needle.
(Approximately 0.05 mm)
Fig. 2
0 to 0.05 mm
Blade point
of the hook
Needle
Needle guard
Fig. 3
1
2
3