Baby Lock A-LINE Lauren BL450A Assembly instructions

Model BL450A
Getting to Know:
A-LINE SERIES
Baby Lock Consumer Helpline: 800-313-4110
www.babylock.com

Model BL450A
Introducing Lauren, the easy-to-use serger from the Baby Lock A-Line series of sewing
machines. Lauren loves to give projects a finished look with reinforced stitches and
decorative edging. Practical and steady, Lauren will make sure every thread stays in place
with a professional look.
This Getting to Know You Guide will take you through a simple, step-by-step process on how
to thread your serger and set tension dials for balanced stitches. Once you’re familiar with
your machine, refer to the instruction and reference guide (packaged with your machine) for
additional directions.
Like all machines in the A-Line Series, Lauren has the features and the durability to handle all
of your projects – you can always count on her to be there for you. Be sure to ask your Baby
Lock Retailer about Lauren’s friends in the A-Line Series, like Audrey, Natalie and Grace.
From classic tailored looks to modern-day fashions, the machines in the A-Line Series will
help you sew and serge with success – all with the quality you’ve come to expect from
Baby Lock.

Setting Up Your Serger
Thread Spools
Threading Your Serger
Extension Bar
Thread Sequence
When threading, it’s important to consider the type of thread you use for serging. Remember, a serger creates
a finished look with reinforced stitches, so strong thread is an important ingredient. A top quality, long staple,
polyester or poly/cotton blend is the best choice. Skipped stitches and broken threads are often the direct result
of using old or inferior thread.
Serger cone thread is designed for serging and feeds
freely from the top. When using decorative threads, a
spool net may be needed. Regular thread spools can
also be used if you insert a spool cap from the accessory
packet into the top of the spool. The spool cap forms a
smooth edge, allowing the thread to feed off evenly.
New owners may be apprehensive about threading the
serger. It’s much easier than it appears. In fact, there
are two methods for threading your serger: Tying-on
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method, but manual threading is almost as quick. It’s a
good idea to practice threading your serger manually. At
some point in time, you will need to re-thread a looper or
all of the thread paths and the time to learn is NOT in the
middle of a sewing project! Practice now, and you’ll be
serging with confidence in no time.
1. Pull the extension bar up as far as it will go.
2. Rotate the thread guide hanger so that the thread
guides are right above the spool pins.
3. Place the cone thread or spools on spool pins.
The thread guides and tension dials are color-coded,
and a color-coded threading diagram is located inside
the front cover of the serger. Proper threading sequence
is the most important rule to remember when threading
your serger:
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Stopper Right
Needle
Thread
Left
Needle
Thread
Upper
Looper
Thread
Lower
Looper
Thread
Back view
Extension Bar Thread Guide Hanger
1

Manual Threading
Threading the Upper Looper
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thread guides.
1. Pass thread through top thread guide hanger from back to
front.
2. Bring thread down and pass through thread guide and
under pretension disc.
3. Bring thread straight down through the slot so that it
passes between the tension discs. Give the thread a tug
to be sure it is secure between the tension discs.
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9. Use tweezers to pass thread through the upper looper eye
from front to back. Pull at least 3 inches (7cm) of thread
through the upper looper.
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Manual Threading
Threading the Lower Looper
A. Pass thread through top thread guide hanger from
back to front.
B. Bring thread down and pass through the thread guide
and under pre-tension disc.
C. Bring thread straight down through the slot so that it
passes between the tension discs. Give the thread a
tug to be sure it is lodged between the tension discs.
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the left.
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toward the left.
G. Turn handwheel toward you until the lower looper is
in extreme left side position. Pass thread through hole
using the tweezers.
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right position. Use the tweezers to pass thread
through lower looper eye, front to back. Pull at least
3 inches (7cm) of thread through lower looper over
upper looper and toward the back of the machine.
Remove the free arm cover and thread the lower looper thread as illustrated below.
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B
C
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Remove free arm cover by swinging the extension table out
with the lever in locked position. The free arm cover will stay
attached to the extension table.
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