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Trouble Cause (1) Cause (2) Checking order and adjusting procedure Page
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1-5) Needle-to-hook timing is
improper.
5)-A Height of the needle bar is
improper.
5)-B Adjustment of the blade point
of hook and needle is improper.
Perform adjusting the timing when needle enters in the center of the
throat plate of left stitch base line. At this time, clearance provided
between the bottom end of needle bar and the top surface of throat
plate is 11.9 mm (standard) or 11.4 mm (K) at the lowest point of the
needle bar. Adjust the height using the timing gauge “1”.
Perform adjusting timing when needle enters in the center of the throat
plate of left stitch base line. Loosen hook sleeve setscrew and adjust,
using the timing gauge “2”, so that the blade point of hook comes in
the center of needle when needle goes up from its lower dead point.
In addition, make sure that needle does not come in contact with the
blade point of hook at the time of right throw on right stitch base line
(when needle throws on the right side). At this time, provide a clearance
of 0.01 to 0.04 mm betwen the needle and the blade point of hook.
(See page 2.)
(See page 2.)
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