HIGHLEAD GC0618-1 사용 설명서 부품 카탈로그 - 페이지 10

{카테고리_이름} HIGHLEAD GC0618-1에 대한 사용 설명서 부품 카탈로그을 온라인으로 검색하거나 PDF를 다운로드하세요. HIGHLEAD GC0618-1 13 페이지. Heavy duty compound feed lockstitch sewing machine

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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

Fig 20