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11
Position of the looper in the direction of sewing/re-adjusting the looper eccentric
.04.10
Requirement
When the needle bar is positioned 6.0 mm after b.d.c. and the stitch length is set at
8.5 mm, the looper point should be centred to the needle.
Fig. 11 - 10
●
Set the stitch length at
●
The scale on the stitch length control button is not identical with the actual stitch length.
●
By turning the balance wheel in the sewing direction, position the needle bar at
after b.d.c.
●
In this position fi t the screw clamp to the needle bar, so that the upwards motion of the
needle bar is blocked.
●
Adjust bracket
Checking the looper drive eccentric
●
Turn the balance wheel in the opposite direction of sewing until the screw clamp has
contact again.
●
Measure the distance between the looper point and the edge of the needle – the di-
stance should be 5 mm.
●
If there is any variance, turn the balance wheel in the sewing direction until the screw
clamp has contact again and carry out the following adjustment:
●
If the value measured is more than
moves half of the difference measured to the left.
●
If the value measured is less than
moves half of the difference measured to the right.
●
After the correction on eccentric
the requirement.
4
3
8.5 mm by piercing paper.
1 (screw 2) in accordance with the requirement.
Keep the stitch length setting for the next adjustment.
1
5 mm, turn eccentric 3 (screw 4), so that the looper
5 mm, turn eccentric 3 (screw 4), so that the looper
3 has been carried out, return to the setting described in
Adjustment
62-031
2
6.0 mm
33
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