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Adjustment
11 - 9
11. 04.08 Hook-to-needle clearance, needle rise, needle height and needle guard
(On Model 1246 make these adjustments on both sewing hooks.)
Requirement
With the stitch length set at „3“ and the needle rise at (1.8 mm after BDC of the needle
bar on model „B“ and 2.0 mm after BDC of the needle bar on model „C“), the following
must be true:
1. The distance to the needle must be 0.05 - 0.1 mm and the hook point must be pointing
to the middle of the needle.
2. The top edge of the eye of the needle must be 0.8 - 1 mm below the hook point.
3. The needle guard must lightly touch the needle.
4
2
1
5
1
0.05 - 0.1 mm
3
Fig. 11 - 08
● Set stitch length „3“ and loosen screws 1 and 2 (also loosen screws 3 on machines with
automatic thread trimmer -900/56).
● Move hook bearing 4 in accordance with requirement 1.
● Tighten screws 1.
● Bring the needle to its BDC and slide the 1.8 or 2 mm thick feeler gauge under the
needle bar bearing, allow the adjustable clamp to come to rest on the feeler gauge and
screw it tight.
● Remove the feeler gauge and turn the handwheel in its direction of rotation until the
0.8 - 1 mm