Baby Lock Ovation (BLES8) Instruction and Reference Guide - Manual (Page 32)

To convert to narrow 3-thread overlock (3.0-5.0mm), cut the O-1
needle thread just above the needle eye. (fig. A)
Remove the O-1 needle and O-1 needle thread completely from
the machine. (fig. B)
Note: Do not tighten needle clamp screw(s) without needle being
inserted within the slot.
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
C-1
C-2
C-3
O-1
O-2
UL
NEEDLES
O-2
LENGTH
2-4
WIDTH
3.0
STITCH
SELECTOR
B
WAVE/OVERLOCK
SELECTOR
OVERLOCK
∧
∨