Gritzner 1002 - Stitch Forming Mechanism; Adjustment of the Needle Clearance in Relation to the Needle Slot

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Stitch forming mechanism
5. Adjustment of the needle clearance in relation to the needle slot
Requirement:
Between the rear edge of the needle and the rear edge of the needle slot in the needle plate, there should
be a clearance of 0.2 mm (fig. 5a).
Note:
For needle system 130/705 H, the needle size increases the actual size of the needle only at the front of
the needle. For example, a size 100 needle will be positioned with its needle point exactly in the center of
the needle slot (viewed from front to back) while the needle point of a size 80 needle will be positioned
with its needle point slightly towards the rear.
Check:
● Insert a new size 100 system 130/705 H needle.
● Set control knob to straight stitch and “left” needle position (fig. 5).
● Remove the presser foot shoe.
● Turn the handwheel until the needle is at its lowest position.
The needle must now be evenly centered from front to back in the needle plate slot.
Adjustment:
● Loosen screw 15 with a 2.5 mm Allen key (fig. 5).
● Move the complete bolt 16 together with the needle bar frame 17 forward or backward until the needle
is centered exactly in the needle plate slot (fig. 5b).
● Tighten screw 15.
Test:
● Carry out a visual test for the straight and zigzag stitches.