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18. Setting the looper-to-needle clearance
Requirement:
When the looper point is in the scarf of the needle “L1” while moving to the left, the looper-to-needle clea-
rance must be 0.05 – 0.1 mm (fig. 31).
Check:
● Turn the handwheel in the normal direction until the looper point of the two thread chainstitch looper
13 is exactly in the scarf of the needle “L0” while moving to the left.
● Check the clearance between the looper point and the needle.
Setting:
● Turn the handwheel in the normal direction until the looper point of the two thread chainstitch looper
13, while moving to the left, is exactly in the scarf of the needle “L0”.
● Slightly loosen the screw 14 on the looper lever (fig. 32).
● Set the looper-to-needle clearance by pushing the looper lever.
● Tighten the screw 14 on the looper lever.
Test:
● As described under “Requirement”.
● The lateral clearance of the two thread chainstitch looper to the needle must be checked or reset as
described in section 17 in the adjustment and repair instructions after having set the looper-to-needle
clearance.
Note:
The needle will be slightly depressed when it picks up the looper thread.
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