Gritzner 1002 - Adjustment of the Feed Dog Lifting Eccentric

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13. Adjustment of the feed dog lifting eccentric
Requirement:
The return movement of the feed dog underneath the needle plate in the forward direction must
be completed when the rising feed dog reaches the needle plate surface.
The lowering of the feed dog must begin shortly before the end of the feed driving movement.
Check:
● Select the largest stitch length.
● Turn the handwheel and carry out a visual check.
Adjustment:
● Remove the detachable work support (accessory box) by pulling it to the left.
● Lay the machine on its back.
● Turn out the five baseplate retaining screws and remove baseplate.
● Turn out both free-arm cover retaining screws (fig. 13a).
● Remove free-arm cover 19.
● Loosen screw 46 with a 2.5 mm Allen key (fig. 13b).
● Turn the handwheel until on the needle bar, in its descending movement from the upper position,
there is a clearance of 15 mm between needle holder and arm edge.
The proper clearance corresponds to the width of the zigzag presser foot shoe (fig. 13).
● Loosen eccentric 47 with a 2.5 mm Allen key.
● Turn eccentric back and forth, until the Allen key rests on the feed driving shaft 36 (fig. 13b).
● Tighten screw 46 in this position so that the long hook shaft 25 does not exhibit any play.
Test:
● Turn the handwheel and carry out a visual check.
● Refit free-arm cover and baseplate.
Note:
Since the lifting movement and the feeding movement influence each other, both must be checked
and readjusted to each other if necessary.