Baby Lock Imagine Wave (Previous Model) (BLE3ATW) Instruction and Reference Guide - Manual (Page 24)

Narrow Hemming is an attractive finish for light to medium to heavy
weight fabrics.
Remove the left needle and needle thread completely from the
machine. Clear the stitch fingers. Turn the stitch length adjusting
dial clockwise to the rolled hem range. Set the length at "1" (fig. A)
and the stitch width at 3.0 for a smooth decorative finish (fig. B).
Move the stitch selector lever to "C".
For the right needle 3-thread narrow hemming, follow the suggested
settings and the threading diagram below.
3
T
H
R
E
A
D
O
V
E
R
L
O
C
K
22
3-Thread Overlock-Narrow Hemming
3 . 0
5 . 0
5 . 5
3 . 0
5 . 0
5 . 5
A
B
C
D
B
C
D
O
O
A
B
A
NEEDLES
right
LENGTH
1.0-1.5R
WIDTH
3.0
STITCH
SELECTOR
C
WAVE
SELECTOR
O