Gritzner 1002 - Adjustment of the Sewing Hook Timing

18
8. Adjustment of the sewing hook timing
Requirement:
At the settings for straight stitch and “middle” needle position, when the needle bar has moved from its
lowest position 2.5 mm upward, the hook point must be positioned exactly on the center line behind the
needle (fig. 8d).
Check:
● Remove the presser foot holder completely and the needle plate.
● Set control knob to straight stitch and “middle” needle position (fig. 8).
● Bring the needle bar to its lowest position by turning the handwheel (fig. 8c).
● Place the needle rise clamp (61-111600-35) over the needle bar and secure it lightly.
● Place the 2.5 mm feeler gauge (61-111600-02) over the needle bar with its cutout above the needle
rise clamp.
● Loosen the needle rise clamp.
● Move the needle rise clamp and the 2.5 mm feeler gauge upward against the needle bar frame.
● Tighten the knurled screw of the needle rise clamp.
● Move the handwheel back and forth slightly.
If there is play on the feeler gauge, repeat the above procedure.
● Remove the 2.5 mm feeler gauge.
● Turn the handwheel in sewing direction until the needle rise clamp is resting on the needle bar frame
(fig. 8d).
The needle has thus risen by 2.5 mm.
The hook point must now be positioned on the center line behind the needle.
Adjustment:
● If the adjustment is not correct, remove the needle rise clamp.
● Lay the machine on its back.
● Turn out the five baseplate retaining screws and remove baseplate (fig. 8a).
● Loosen screws 27 with a 2.5 mm Allen key (fig. 8b).
● Fit the needle rise clamp again and repeat the worksteps until the needle is once again in needle rise
position (see “Check” fig. 8d)).
● Turn the long hook shaft 25 so that the hook moves forward and the hook point is on the center line
behind the needle (fig. 8d).
● Tighten one of the screws 27 (fig. 8b).
Test:
● Turn the handwheel a little backward and then forward until the needle rise clamp is resting on the
needle bar frame. The hook point must now be positioned on the center line behind the needle.
● Remove the needle rise clamp.
● Tighten screws 27 very tightly.
Note:
After this adjustment, the setting of the feed dog lifting eccentric (Point 13 of this manual)
must be checked and adjusted if necessary.