Baby Lock Evolve (Previous Model) (BLE8W) Instruction and Reference Guide - Manual (Page 32)

To convert to narrow 3-thread overlock (3.0-5.0mm), cut the O-1
needle thread (fig. A). Remove the O-1 needle and O-1 needle thread
completely from the machine.
Tighten the needle clamp screw slightly to prevent the screw from work-
ing out (fig. B).
Place needle into O-2 needle clamp position and tighten screw.
Move the stitch selector lever to "B".
For the O-2 needle, 3-thread overlock sewing, follow the suggested
settings and the threading diagram below.
O
V
E
R
L
O
C
K
S
T
I
T
C
H
E
S
E
X
P
R
E
S
S
30
3-Thread Overlock - Narrow
A
B
NEEDLES
O-2
LENGTH
2.5 - 3.5
WIDTH
3.0
STITCH
SELECTOR
B
WAVE
SELECTOR
O