Position of needle and hook
20 Service Instructions 171/173 - 00.0 - 01/2020
6.3 Adjusting the needle evasive movement (ellipsis width)
Fig. 6: Adjusting the needle evasive movement (ellipsis width) (1)
Proper setting
The distance to the needle is 0.1 mm during the hook movement from left
to right.
While the hook is moving from left to right, the tip of the descending needle
abuts on the back of the hook at the moment when the hook and the
needle assume the position shown above.
Fig. 7: Adjusting the needle evasive movement (ellipsis width) (2)
The precise measurement of the evasive movement depends on the
needle system and the needle strength.
The evasive movement is calculated using the following formula:
E = a + b + 0.1 +X
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