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9.3 Setting the needle evasive movement (ellipsis width)
Fig. 34: Setting the needle evasive movement
Check correct setting
The needle evasive movement is correctly set if during the looper move-
ment from right to left, the distance to the needle is 0.1 mm and during the
looper movement from left to right the point (1) of the descending needle
is at the back of the looper (2) at the moment when the looper and needle
take up the position shown in the above sketch.
The precise dimension of the evasive movement depends on the needle
system and the needle thickness.
It must therefore be calculated using the following formula:
42
WARNING
Risk of injury
Risk of crushing from moving parts
Switch off the sewing machine before adjusting the needle
evasive movement.
①
(1) - Point of the needle
(2) - Looper
E = a + b + 0.1 + X
②
b
(b) - Looper thickness
(a) - Needle thickness
Service Instructions 610/630 - 00.0 - 10/2014
Setting the looper
a
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