39
Setting the two thread chainstitch looper
17. Setting the lateral clearance to the two thread chainstitch needle “L2”
Requirement:
When the two thread chainstitch looper 13 is at its right point of reversal, it should have a clearance
of 1.6 mm to the needle “L2” (fig. 30).
Check:
● Turn the handwheel in the normal direction until the two thread chainstitch looper 13 is at its right
point of reversal.
● Check the clearance using the adjustment gauge (measurement F).
Setting:
● Turn the handwheel in the normal direction until the two thread chainstitch looper 13 is at its right
point of reversal.
● Loosen the screw 14.
● Set the clearance of 1.6 mm using the adjustment gauge (measurement F).
● Turn the screw 14 slightly.
Test:
● As described under “Requirement”.