Brother 3034 D Manual

							9
English
Differential feed
This serger is equipped with two sets of feed dogs
under the presser foot to move the fabric through the
machine. The differential feed controls the movement of
both the front and the rear feed dogs. When set at 1, the
feed dogs are moving at the same speed (ratio of 1).
When the differential feed ratio is set at less than 1, the
front feed dogs move slower than the rear feed dogs,
stretching the fabric as it is sewn. This is effective on
lightweight fabric that may pucker. When the differential
feed ratio is set at greater than 1, the front feed dogs
move faster than the rear feed dogs, gathering the fabric
as it is sewn. This function assists in removing the
rippling when serging stretch fabrics.
Differential feed adjustment
The normal setting is 1.0 on the differential feed
adjustment dial.
To adjust the diffrerential feed, turn the dial on the right
bottom of the body.
1
2
  1 Less than 1.0   2 Greater than 1.0    Selection mark
Feed
ratio
0.7 - 1.0
1.0
1.0 - 2.0
Main
feed
(rear)Differential
feed
(front)
      
    
 
Effect
Material is
pulled tight.
Without
differential
feed.
Material is
gathered or
pushed
together.
Application
Prevents thin
materials from
puckering
Normal
sewing
Prevents
stretch
materials from
stretching or
puckering
An example
When stretch material is sewn without using the
differential feed, the edge will be wavy.
To get smooth finish, adjust the feed ratio from 1.0
toward 2.0.
(The feed ratio required depends on the elasticity of the
material.)
The more elastic the material, the further toward 2.0 the
differential feed ratio should be set. Test sew with a
scrap of the fabric to find the correct adjustment.
 CAUTION
When sewing thick non-stretchable material such
as denim, do not use the differential feed as it
may damage the fabric.
Adjusting the presser foot pressure
Turn the pressure adjustment screw on the top left of
the machine. You can adjust by reffering the value on
the screw.
The normal setting is 2.
1
2

1 Less pressure
2 More pressure
 Selection mark 
						

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Tension adjustment dial
There is a thread tension dial for each needle thread,
the lower looper thread and the upper looper thread.
The correct thread tension may vary according to the
type and thickness of the fabric and the type of thread
used. Thread tension adjustments may be necessary for
any change in sewing materials.
1234
1 Yellow marked tension disc is for left needle.
2 Pink marked tension disc is for right needle.
3 Green marked tension disc is for upper looper.
4 Blue marked tension disc is for lower looper.
Tension control
Sewing is possible at position 4 for most
circumstances. (Standard: SPAN 60/3Z)
If the stitch quality is insufficient, select a different
tension setting.
4
5
3


 Tension selection mark
1 For heavy tension: 4 to 7
2 For light tension: 4 to 2
3 For medium tension: 5 to 3
If you cannot find the correct tension, refer to the charts
on following pages.
 CAUTION
Make sure that the thread is properly seated inthe tension discs. 
						

							11
English
AC
B
A
BD
A
BE
F
A
BEF
A
BEF
A
BC
D
Chart of thread tension adjustment, Two-needle (Four-thread)
A: Reverse
B: Surface
C: Left needle thread
D: Right needle thread
E: Upper looper thread
F: Lower looper thread
Right needle
thread is loose.
Left needle thread
is tight.
Right needle
thread is tight.
Upper looper
thread is tight.
Lower looper
thread is loose.
Upper looper
thread is loose.
Lower looper
thread is tight.
Upper looper
thread is loose.
Lower looper
thread is loose. Left needle thread
is loose.
When you adjust the
thread tension, do it in the
following order:
(1) Left needle thread
(2) Right needle thread
(3) Upper looper thread
(4) Lower looper thread
This is the easiest way to
obtain the correct thread
tension.
Tighten left
needle thread.
(yellow)
Tighten right
needle thread.
(pink)
Loosen left
needle thread.
(yellow)
Loosen right
needle thread
(pink)
Loosen upper
looper thread
(green)
Tighten lower
looper thread
(blue)
Tighten upper
looper thread
(green)
Loosen lower
looper thread
(blue)
Tighten upper
looper thread
(green)
Tighten lower
looper thread
(blue) 
						

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AC
C
B
A
B
A
BDE
A
BDE
A
BD D
E
E
Chart of thread tension adjustment, One-needle (Three-thread)
When you adjust the
thread tension, do it in the
following order:
(1) Needle thread
(2) Upper looper thread
(3) Lower looper thread
This is the easiest way to
obtain the correct thread
tension.
A: Reverse
B: Surface
C: Needle thread
D: Upper looper thread
E: Lower looper thread
Needle thread is
tight.
Upper looper
thread is tight.
Lower looper
thread is loose.
Upper looper
thread is loose.
Lower looper
thread is tight. Needle thread is
loose.Tighten needle
thread.
(yellow or pink)
Loosen needle
thread.
(yellow or pink)
Loosen upper
looper thread
(green)
Tighten lower
looper thread
(blue)
Tighten upper
looper thread
(green)
Loosen lower
looper thread
(blue)
Tighten upper
looper thread
(green)
Tighten lower
looper thread
(blue) Upper looper
thread is loose.
Lower looper
thread  is loose. 
						

							13
English
Needle
This machine uses a standard home sewing
machine needle.
The recommended needle is SCHMETZ 130/
705H (#80 or #90).
Needle description1 Back (flat side)     2 Front     3 Groove
12
3
How to check the needle4Flat surface
5Place the needle on its flat side and check to see if the
space is parallel.
45
NOTE:
Countermeasures for material breakage .
It can reduce the occurrence of material breakage by
using SCHIMETZ 130/705H SUK (#90) BALL POINT.
Removing/ Installing the needle
 Removing/ installing the left needle
 Removing/ installing the right needle
1
21
2
 
    
1 Tighten2 Loosen
To remove:
1. Turn the main power and light switch to the
OFF position.2. Turn the hand wheel so that the mark on the
hand wheel is aligned to the line on the
machine. (See CHAPTER 1 Turning direction
of hand wheel.)
3. Loosen the corresponding needle set screw
with turning the included hexagonal driver
toward 2 in the figure, and remove the
needle.
To install:
1. Turn the main power and light switch to the
OFF position.
2. Turn the hand wheel so that the line on the
hand wheel is aligned to the line on the
machine.
3. Hold the needle with its flat side away from you
and insert it up as far as it will go.
4. Tighten the needle set screw securely with
turning the included hexagonal driver toward
1 in the figure.
NOTE:
Make sure to insert the needles all the way.
If the needles have been inserted correctly, the right
needle should be set slightly lower than the left one.
 CAUTION
Always be sure to turn off the power before
removing/ inserting the needle.
Do not drop the needle and needle set screw in
the machine, otherwise it may be damaged. 
						

							14
CHAPTER 2
PREPARATION BEFORE THREADING
Thread tree
Raise the telescoping thread tree to its highest
position. Make sure that the thread holders are in
alignment above the spool pins as illustrated
below.
1 Thread holder on thread tree
2 Spool pin
3 Correct position
3
21
How to use the thread spool cap
When using sewing thread spools, the thread
spool cap should be used as illustrated below.
Make sure that the spool notch is on the bottom.

    1 Thread spool cap
How to use the thread net
If you are sewing with loosely spun nylon thread,
we recommend that you cover the spool with the
net supplied to prevent the thread from slipping off
the spool.
Adapt the net to the shape of the spool.
Before threading
1. Turn off the main power and light switch for
safety.
2.  Raise the presser foot using presser foot
lever.
3. Turn the hand wheel so that the mark on the
hand wheel  is aligned to the line  on
the machine. (See CHAPTER 1 Turning
direction of hand wheel.)

 
						

							15
English
CHAPTER 3
THREADING
5. Guide the thread down the channel and pass
the thread through the threading points
5678 next to the blue color marks following
the numerical order in the accompanying
illustration.
NOTE:
Make sure to thread both of the thread take ups 7.
Continue on Lower looper easy threading
operation.
Lower looper easy threading
operation
1. Slide the lower looper threading lever  to
the right.
The lower looper  moves to the position
illustrated as below.


CAUTION
Slide the threading lever only in the directions
shown by the arrow. Forcefully moving the
threading lever in any other direction may
damage it.
Before sliding the lower looper threading lever,
make sure the needle is at its highest position.
2. Pass the thread as illustrated.
Threading has to be done in the following order.
1. Lower looper
2. Upper looper
3. Right needle
4. Left needle
Threading the lower looper
Run the thread in the sequence illustrated,
following the blue color and the numbers next to
each threading point.
21
3
4
3
4
5
6 7
890
6
7 8
90
1. Open the front cover by sliding to the right and
guiding the top toward you.
2. Pull the thread off the spool and directly up
through the thread holder 1 and the thread
plate 2 on the thread tree from back to front.
3. Pass the thread thourgh the hole 3 on the top
of machine.
4. Pass the thread through the tension disc 4
which is in the channel next to the blue tension
adjustment dial. 
						

							16
3. Pass the thread through the eye of the lower
looper.
4. Slowly turn the hand wheel, and make sure the
returns to the original position.
NOTE:
If the lower looper thread breaks during sewing, cut and
remove thread from both of the needles.
Before re-threading the lower looper, make sure that the
lower looper re-threading is done exactly as
diagrammed. The machine will not operate properly if
the threading is not done in the proper sequence.
 CAUTION
Thread the needles after the lower looper andupper looper have been threaded. 
						

							17
English
5. Guide the thread down the channel and pass
the thread through the threading points
5678 next to the green color marks
following the numerical order in the
accompanying illustration.
NOTE:
Make sure to thread only through the upper thread
take up 
7.
6. Pass the thread through the eye of the upper
looper 9.
NOTE:
If the upper looper thread breaks during sewing:
This may be caused by the lower looper thread getting
caught on the upper looper. If this happens, lower the
upperlooper by turning the hand wheel, remove the
lower looper thread from the upper looper, and re-thread
the upper looper from at least the tension disc.
Threading the upper looper
Run the thread in the sequence illustrated,
following the green color and the numbers next to
each threading point.
21
3
4
3
4
5
6
67
78
8 9
9
1. Open the front cover by sliding to the right and
guiding the top toward you.
2. Pull the thread off the spool and directly up
through the thread holder 1 and the thread
plate 2 on the thread tree from back to front.
3. Pass the thread thourgh the hole 3 on the top
of machine.
4. Pass the thread through the tension disc 4
which is in the channel next to the green
tension adjustment dial. 
						

							18
Threading the right needle
Run the thread in the sequence illustrated below,
following the pink color and the numbers next to each
threading point.
2 1
3
4
5 6
7
8 3
4

 
88
7
1. Pull the thread off the spool and directly up
through the thread holder 1 and the thread
plate 2 on the thread tree from back to front.
2. Pass the thread thourgh the hole 3 on the top
of machine.
3. Pass the thread through the tension disc 4
which is in the channel next to the pink tension
adjustment dial.
4. Guide the thread down the channel and across
through the threading points 5 6 7 next to
the pink color marks following the numerical
order in the accompanying illustration.
NOTE:
Make sure the thread is through the right of the
separater .
5. Bring the thread down through the needle bar
thread guide and through the right needle 8
from front to back.
 (: two needles/ : one needle)
Threading the left needle
Run the thread in the sequence illustrated, following the
yellow color and the numbers next to each threading
point.
2 1
3
4
3
4
5 6
8
7
7 


88
1. Pull the thread off the spool and directly up
through the thread holder 1 and the thread
plate 2 on the thread tree from back to front.
2. Pass the thread thourgh the hole 3 on the top
of machine.
3. Pass the thread through the tension disc 4
which is in the channel next to the yellow
tension adjustment dial.
4. Guide the thread down the channel and across
through the threading points 5 6 7 next to
the yellow color marks following the numerical
order in the accompanying illustration.
NOTE:
Make sure the thread is through the left of the
separater .
5. Bring the thread down through the needle bar
thread guide and through the left needle 8
from front to back.
(: two needles/ : one needle)