a. The needle thread resembles a straight stitch
on the topside of the fabric and lies on the left
hand side of the upper looper thread. Needle
thread is visible in the lower looper thread on
the underside of the fabric.
c. The lower looper thread should lie flat on the
underside of the fabric and lock with the upper
looper thread (b) on the edge of the fabric.
The needle thread (blue or red) is too loose.
If either needle thread (a) is too loose and clearly
visible on the underside of the fabric, increase
that needle thread tension (blue or red).
3 Thread Wide
OR
Overlock 3
3 Threads
Balanced Tension
50
4
3
22
3
4 4
3
2 2
3
4
b. The upper looper thread should lie flat on the
topside of the fabric and lock with the lower
looper thread (c) on the edge of the fabric.
How to Adjust 3 or 4 Threads
Needle Threads (Blue and Red)
b
a
c
a
