Fixed knife 4 and driving knife 6 must be in parallel position standing under a slight cutting pressure.
Parallel position correction
Loosen screw 3 slightly for adjusting the parallel position of thread pulling knife 6 and counter-knife 4, then
change counter-knife 4by setting the screws 2 in such a way that the edges of thread pulling knife and
counter-knife are in parallel position. Tighten screw 3 at last.
Cutting pressure adjustment
The knives should guarantee a safe cut at the lowest possible pressure of the counter-knife against the thread
pulling knife. This is normally the case when the edge of the counter-knife just touches the thread pulling knife
with a knife overlapping of 1/3.
Loosen screws 1, then turn counter-knife support in such a way that the condition is fulfilled, at last, tighten
screws 1.
3.Adjustment of trimmer cam (Fig.24)
1) Rotate the balance wheel to lower the needle to the DOWN position
2) While keeping the DOWN position,
press the cam follower crank to enter the roller
into the trimmer cam groove.
3) Adjust the trimmer cam so that the
movable knife starts moving when the balance
wheel is turned by hand and the green mark
point on the balance wheel meets the black
point on the arm.
To adjust, loosen two trimmer cam screws A.
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8
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Содержание GC24818-1D
Страница 12: ...A ARM BED MECHANISM 9...
Страница 14: ...B THREAD TENSION REGULATOR MECHANISM 11...
Страница 16: ...C NEEDLE BAR AND THREAD TAKE UP MECHANISM 13...
Страница 18: ...D NEEDLE BAR PRESSER FOOT MECHANISM 15...
Страница 20: ...E HOOK SADDLE MECHANISM 17...
Страница 23: ...F KNIFE MECHANISM 20...
Страница 25: ...G LOWER SHAFT OIL LUBRICATION MECHANISM 22...
Страница 27: ...H ACCESSORIES 24...
Страница 28: ...H ACCESSORIES 25...