Bernina KL. 940 Service Manual page 25

d) Feed-dog advance (timing of motion)
When the thread take-up lever is at its highest point, a short advance motion can still be
discerned (1 /2-3/4 feed-dog tooth). The forward advance must then be ended.
Correction:
- Stitch setting lever to position 6
-
Loosen two screws 127 at advance eccentric and turn advance eccentric as required
- Tighten screws.
WARNING: The lift and advance eccentric must not be displaced laterally when
tightening, or the lift and advance fork could jam.
e) Limiting the feed-dog depth
When the feed-dog is lowered the screw 1 6 2 serves as a stop in the downwards
direction. This prevents the feed-dog from touching the bobbin case stopper and hook.
Correction:
Set knob for sewing/darning to sewing. Then bring the feed-dog t o its lowest position by
turning the handwheel. There should then remain approx. 0.2 mm clearance between
stopping screw and feed-dog carrier.
If not loosen locknut 1 63. Set screw
162
in prescribed position and tighten locknut.