4
Automatic Mechanism
1. Adjustment of the lifting clearance between the feeler finger and the cams (class 1004)
Requirement:
When the right control knob is rotated, the lifting clearance between the feeler finger and the highest
points of the cams must be 0.2-0.3 mm (fig. 1).
Check:
● Fold up the carrying handle.
● Turn out both arm cover screws and remove arm cover.
● Set control knobs as shown in fig. 1a.
● Turn the handwheel until the highest point of the zigzag cam 1 lies exactly in front of feeler finger 2.
● Turn the right control knob carefully between the straight stitch symbol and the elastic stitch symbol.
The lifting clearance between the feeler finger 2 and the highest point of cam 1 must
now be 0.2-0.3 mm.
Adjustment:
● Loosen screw 3 (fig. 1 and 1a).
● To increase the lifting clearance, push lever 4 in direction “A”.
● To reduce the lifting clearance, push lever 4 in direction “B”.
● Tighten screw 3.
Test:
● Rotate the right control knob back and forth to test the correct lifting clearance of 0.2-0.3 mm.
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