Baby Lock BL3-407 Manual de usuario
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Pressure adiusting belt Spool stand
Thread take-uP lwer guard Handle type thread guide
Threed takeuP guide Face plate thread guide
Thread guide switch Needle thread tension adjuster
Thread tension adjuster
Thread take-uP cover thread guide
Upper knite Upper looper thread
tension adjuster
Thread finder
Throat Plate Lower looper thread
tension adjuster
Presser foot Flywheel
Lower knife
Side cover
Base plate
Rubber cushion
Knife cover
Needle bar thread gui * For safety, remove power supply plug after use'
Do not piace objects on the controller'
Needle clamP screw
thread guide
Lower looper thread take-up
Upper knife holder
fixing screw
Lower looper Lower looper thread take-up guide
Upper looper intermediary thread guide
looper thread take-uP
Looper soction
INTRODUCTION
Thank you for your purchase of our Baby Lock Model BL3407.
This machine not only works as two machines, both 3-thread and 2-
thread overedgers, but can sew a wide range of fabrics, from the thickest
to the thinnest materials.
This instruction booklet will be your guide to correct operation of Model
8L3407. Read this booklet carefully and you will be the real master of
your new machine.
Belt cover screws
(Figure 1)
Mount the motor correctly onto the machine
body as follows:
Remove the belt cover by loosening both belt
cover screws (Figure 1).
Mount the motor onto the machine body by
tightening the bracket f ixing screw while
setting the V-belt in place at the same time,as
shown in Figure 3. (The bracket fixing screw,
washer and V-belt are enclosed together in the
carton).
Belt tension will be most suitable when the
V-belt bends slightly under finger pressure
(see Figure 4). Make belt tension adjustments
by shifting the position of the belt tension
adjusting nut accordingly (Figure 4).
Re-attach the belt cover.
(Figure 4)
Belt tension adiustinq
fixing screw
uE@\
Bracket {ixing screw (Figure 2)
(Figure 3)
2
(Figure 5)
Controller
Connecting controller to motor
Put the connector in the terminal box socket,
as shown in Figure 5. Then put power inductive
plug into the power supply socket.
The machine runs faster as the controller pedal
is pressed down farther and slower as the pedal
is let up.
* For safety, be sure to remove the power
supply plug after use. Also be sure not to
place objects on the controller.
3
Terminal box
The one hand threading system of this machine ensures you the easiest possible threading.
You only have to thread correctly alonn the color-coded thread passages.
2-1 Prior to threading
(1) Setting of spool
Cheese (or cone) spool thread will be usually
used for this machine. Bobbin spool thread
is also available when held by *bobbin sup-
porter, as shown in Figure 7.
* available separately at order
(2) How to open knife cover and side cover
(Figure 8)
Pull the knife cover knob to the right and
then downward. Push open the side cover
to the left.
'Bobbin supporter
Bobbin spool thread
lFigure 7)
Push open tu the left.
Pull the knob to the right and
then downward.
Ch6€so spool thread
Fit 'baby net' (accessory) to cover
spool when you use synthetic
threads that are liable Io frczzle. (Figure 6l
4
(1)
(2)
(3)
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i
2-2 For changing threads
Cut the thread (to be changed) near the
spool and tie the new thread to the re-
maining piece of thread on the machine,
as shown in Figure 9.
Lift up presser foot.
Lift tension adjuster knob so that it passes
the knot of linked thread smoothly, and
draw the thread till the knot comes about
10 cm past the presser foot (Figure 10).
Note: Special care must be taken when
changing "needle thread" :
Cut off the knot before it is rlrar,rrn
too near to the needle eye so as to
avoid possible bending of the neerlle
by pulling the knot caughr in rhe
needle eye (see Figure 1 1 ).
il
(Figure 9)
K nots
__'______-\--\
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(Fisure 101
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Needle eye
(Figure 111
5
2-3 For 3-thread overedging
This machine is pre-adjusted for 3-thread over-
edging and when unpacked will be found set
accordingly with three trial threads.
o Position of subsidiary looper and thread
guide switch
For 3-thread overedging, the subsidiary looper
and thread guide switch should be set in the
positions shown in Figure 12 and Figure 13.
respectivel y.
Handling guides for the subsidiary looper and thread guide switch
is charted on the back side of the knife cover.
Subsidiary looper
(Figure 12)
Thread guide switcl
=Red indicator
J,
2c
(Figure 131
6
(3)
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(1)
(2t
How to set looper thread
Open both knife cover and side cover.
Set the upper looper thread according to the
'pink code.'
Draw out the thread about 1 0 cm away from
the presser foot'(see Figure 14 and Figure
15).
Set the lower looper thread in accordance
with the 'yellow code.'
The lower looper may be threaded most
easily in the following manner:
Turn the flywheel clockwise to bring the
lower looper to the far left.
Thread through the lower looper thread
guide @ and the lower looper first hole
@ while looking through the thread
f inder. Then bring the lower looper to the
far right and thread it through the lower
looper second hole @ .
Draw out the thread about 10 cm away
from the presser foot (see Figure 14 and
Figure 15).
Close both knife cover and side cover.
* A threading guide is charted on the back
side of the side cover.
Threading loopers
Thread finder
(for lower looper
th read )
\"(
t,E
ii
bi
'o/ :f(ffi
(Figure 141
7
. How to set needle thread
Correctly set the needle thread in accordance
with the 'blue code' referring to Figure 16 and
Figure 17. Then, be sure to pass the thread
through the needle eye from this side out into
the other side (hollow side). Draw out the thread
about 1 0 cm away from the presser foot.
Tension adjuster knob
Pass thread between the two plat€s, (Figure 161
')' batulot
(Frgure 17)
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