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....

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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...

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...

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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...

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
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3
How to check the needle4Flat surface
5Place the needle on its flat side and check to see if the
space is parallel.
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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/...

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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
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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...

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...

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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...

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...

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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...