6.Adjustment of upper looper:
When upper looper move to
highest piont,
The distance between looper tip
and left needle hole
Is 5.4-5.7mm(4 thread)、
4.5-5mm(5 thread),the height
from looper tip to needle plate
Is 11.5mm(4 thread)、10.5mm(3
thread、5 thread)。
5.4-5.7mm
11.5mm
Maintenance instructions