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Sewing feet
Proper setting
The lifter shaft (3) must move smoothly, but must not have any axial play.
The play of the lifting mechanism should be approximately 0.5 mm between
the spring guide (2) and the lifter lever (1).
Abb. 48: Setting the mechanical sewing foot lifting (2)
(4) - Lifter block
(5) - Screw
To set the mechanical sewing foot lifting:
1. Remove the arm cover ( p. 17).
2. Remove the head cover ( p. 17).
3. Unscrew the electrical and pneumatic unit.
Tightening the lifter shaft
4. Loosen the screw (5).
5. Slide the lifter shaft (3) all the way to the right.
6. Slide the adjusting ring (6) onto the bearing bush.
7. Tighten the screw (5).
Setting the lifter shaft play
8. Loosen the screws on the lifter block (4).
9. Move the lifter shaft (3) until play exists.
10. Tighten the screws on the lifter block (4).
Service Instructions 670/680 - 00.0 - 07/2017
Make sure that the shaft can still run easily.
(6) - Adjusting ring
⑥
⑤
④
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