Global BM 345, Инструкции механика

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2.7.2 Adjusting the needle stroke (figure 5, figure 6 and figure 8)
For a loop stroke of 2.3
–
3.0 mm, the needle stroke must be set to that the left
side of the needle’s eye is approx. 1.0 +0.
5 mm away from the large gripping
finger when the tip of the large gripping finger is above the centre of the needle
(figure 8) .
The head cover must be removed for the adjustment. After removing (hex key
size 4) screw (1) shown in
figure 6 , the ball pin (2) shown in figure 5 can be
adjusted using a slotted screwdriver.
In the horizontal position, insert the ball pin so that the slot of the ø6 bolt stands
vertically beneath the ø7 bolt.
Rotating it clockwise will result in a larger needle stroke while turning it in the
opposite direction will create a smaller needle stroke.
The distance between the ball pin and needle shaft is 2 ±0.5 mm. After
adjusting the needle stroke, the needle lever must be configured as described in
section “2.7.1 Assembly”.
Tighten the screw (1) shown in
figure 6
.
Check the gripper and needle movement by turning the main shaft using the
handwheel.