HIGHLEAD GC0618-1 Інструкція з експлуатації Каталог деталей - Сторінка 10
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18 TIMING BETWEEN
THE HOOK AND
THE NEEDLE
(Figs 18, 19)
After setting the needle bar height, set stitch
length to minimum, turn the balance wheel
toward you until the needle bar reaches its
lowest point. Continue turning and allow
the needle bar to raise about 2mm while
on its upward stroke. With needle bar in
this position, the point of the sewing hook
should be at the center of the needle, and normally, the measurement between the hook point and
the upper end of the needle eye should be 2.4mm, further the clearance between the hook point
and the needle hollow should be about 0.05mm to 0.1mm.
1 ) If the sewing hook should not be timed correctly, loosen the three set screws. Tum the hook
shaft to align the hook point with the center of the needle. Re-tighten the three set screws and
re-check the timing of the sewing hook.
2 ) To adjust the clearance between the hook point and the needle hollow, loosen the two screws
and move the hook to the right or to the left as may require. Please note one of the two
screws is placed on the "V" ditch of hook shaft. Therefore, keep the screw on "V" ditch during
adjustment. Re-tighten the screws.
19 ADJUSTING THE HEIGHT OF
THE PRESSER FEET (Fig 20)
1 ) Adjustment by the presser bar lifter
Loosen the screw 1 sufficiently raise the presser bar lifter and loosen the set screw 2. Move the
lifting presser foot up or down as may be required so as to get the correct height and tighten
the screws.
2 ) Adjusting the lift of alternating presser feet
If the height or the lifting presser foot changes, the momentums of the lifting and vibrating
presser foot vary thus the height of the vibrating presser foot must be adjusted. To adjust this,
lower the presser bar lifter, holding the vibrating presser foot B (Fig.6) and loosen the hexagon
screw 3 and move the presser foot up or down as may be required. After setting the position
tighten the screw.
Fig 19
1
5
4
3
2
Fig 20