Consew 227 - TIMING BETWEEN THE HOOK AND NEEDLE

ADJUSTING THE HEIGHT OF THE NEEDLE BAR
1. When the needle bar Is at its highest point, normally the measurement
between the surface of the needle plate and the upper end of the needle
eye is 21.1 mm (in case of the machine with the synchronized binder, it is
19.3 mm).
To adjust this, loosen the screw (2, Fig. 3), move the setting position of
the needle bar and needle bar connecting stud (3, Fig. 3) to get the correct
position. Then tighten the screw.
2. There is another method for this adjustment by setting the needle bar
to its lowest point.
The normal position, in this case, is 4 mm approximately from the hook
point to the upper end of the needle eye.
NOTE: These measurements are approximate standard, accordingly, following final
adjustments are recommended.
TIMING BETWEEN THE HOOK AND NEEDLE
After setting the needle bar height as stated 1. or 2., confirm as follows:
Set the stitch length to 0, turn the hand wheel to lower the needle bar
to its lowest point, turn the hand wheel toward you.
When the needle raises 1.9 mm from the lowest point of its travel, normally
the hook point is at the center of the needle and the measurement between
the hook point and the upper end of the needle eye should be 2.1 mm,
further the clearance between the hook point and the needle hollow should
be about 0.05 mm to 0.2 mm.
If they are not measured as above, adjustments are made as follows:
2.1mm
1.9mm
Fig. 24
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From the library of: Superior Sewing Machine & Supply LLC