Removing And Resetting Upper Knife - Yamato VG3511-8F Instruction Manual

7.5 Removing and resetting upper knife

Removing the upper knife:
(1) Loosen the screw ⑥ on the upper knife holder ④ .
(2) Remove the upper knife holder ④ .
(3) Remove the screw ⑦ on the upper knife ③ .
(4) Remove the upper knife ③ .
Resetting the upper knife:
(1) Attach the upper knife ③ to the pin ⑧ in the upper
knife holder ④ and tighten the screw ⑦ securely.
(2) Set the left end of the chip receiver ⑨ fixed on the left
of the upper knife holder ④ 1.5 ㎜ apart from the left
end of the upper knife shaft ⑩ .
(3) Rotate the handwheel manually to lower the upper knife
③ at the lowest point. Move the upper knife holder ④
to place the upper knife tip 0.5 ㎜ above the top of the
lower knife. Then, tighten the screw ⑥ securely.
(4) Loosen the screw ② on the collar(left) ① . The upper
knife ③ touches the lower knife ⑤ with its spring.
(5) Rotate the handwheel manually to check the sharpness
of the blades by setting a thread between the upper
knife ③ and the lower knife ⑤ .
(6) Set the top of the lower knife ⑤ 7.0 ㎜ apart from the
upper knife ③ tip (at the base of the blade). Then,
tighten the screw ② securely. (See Fig. 7-7)
(7) Recheck the knives cut properly.
⑨
⑩
1.5 ㎜
Fig. 7-10
④
⑨
④
Fig. 7-8
Fig. 7-9
③
stitch plate
Fig. 7-11
37
7. Trimming mechanism
①
②
⑥
③
⑧
④
⑥
⑤
⑦
0.5 ㎜
VG3511-8F