2003 / 2005 / 2007
SERVICE MANUAL
05/00 Printed in Switzerland 395902-72
CONTENTS
TROUBLE HOOTING 2-3
REMOVAL:
FACE PLATE COVER 4
BASE COVER 5
REAR COVER 6
FRONT COVER 7
ADJUSTMENT:
NEEDLE THREAD TENSION 8
BOBBIN THREAD TENSION 9
PRESSER BAR HEIGHT 10
ZIGZAG TIMING 11
NEEDLE CENTERING 12
FEED DOG HEIGHT 13
NEEDLE CENTERING TO NEEDLE PLATE 14
CLEARANCE BETWEEN NEEDLE AND SHUTTLE HOOK 15
NEEDLE BAR HEIGHT 16
HOOK TIMING 17
FEED LIFTING CAM POSITION 18
FEED TIMING 19
STRETCH STITCH FEED BALANCE 20
BUTTONHOLE FEED BALANCE 21
BUTTONHOLE SIZE 27
OPENING OF CAM FOLLOWER (for models 2007 and 2005) 22-23
ZERO POSITION OF ZIGZAG STITCH (for models 2007 and 2005) 24
MOTOR BELT TENSION 25
ELECTRICAL CONNECTIONS 26
1
27 BUTTONHOLE SIZE
TROUBLE SHOOTING
Trouble Cause Remedy
Skipping stitch 1. Needle is not inserted properly.
2. Needle is bent or blunt.
3. Needle thread is not threaded
properly.
4. Size of needle is not appropriate
to thread or fabric.
5. A stretch fabric is being sewn
6. Needle bar height is not
appropriate.
7. Hook timing is not correct.
8. Clearance between needle and
hook is not appropriate.
Insert a needle flat side to the
back.
Replace with a new needle.
Rethread the needle thread.
Use appropriate size of needle.
Use blue tip needle.
Adjust the needle bar height
see page 16.
Adjust the hook timing see
page 17.
Adjust the clearance see page
15.
Machine does not
feed fabric.
1. Feed dog height is not enough.
2. Thread is jammed in the back of
fabric
3. Feed dog is worn out.
Adjust the feed dog height
Draw the needle and bobbin
threads to the left under the
presser foot when starting to
sew.
Replace with a new feed dog.
Breaking needle
thread
1. Sewing speed is too high when
starting to sew.
2. Needle thread is not threaded
properly.
3. Needle is bent or blunt.
4. Needle thread tension is too tight.
5. Size of needle is not appropriate
to thread or fabric.
6. Faulty needle.
7. Scar or burr in needle plate.
8. Thread being used is not suitable.
Start to sew slowly.
Rethread the needle thread.
Replace with a new needle.
Adjust the tension see page 7.
Use appropriate size of needle.
Replace with a new needle.
Remove scar or burr.
Use high quality sewing
machine thread.
Breaking bobbin
thread
1. Bobbin thread is not threaded
properly
2. Too much bobbin thread.
3. Lint is piled up in shuttle race.
4. Thread being used is not suitable.
5. Bobbin is tangled with thread.
6. Bobbin thread tension is too tight.
Rethread the bobbin thread.
Adjust the bobbin winder
stopper position.
Remove the lint.
Use high quality sewing
machine thread.
Remove the tangled thread.
Adjust the bobbin thread
tension see page 8.
2
TROUBLE SHOOTING
Trouble Cause Remedy
Breaking needle 1. Needle touches plate.
2. Needle is bent or blunt.
3. Needle touches shuttle hook.
4. Machine feeds while needle is in
fabric or zigzag timing is not
correct.
5. Fabric is pulled while sewing.
Adjust the needle drop see
page 11.
Replace with a new needle.
Adjust the clearance between
needle and shuttle hook see
page 15.
Adjust the zigzag timing see
page 10.
Do not pull the fabric while
sewing.
Machine is noisy 1. Backlash between lower shaft
and hook driver gears is not
appropriate.
2. Too much play on lower shaft
3. Motor belt tension is too tight.
4. Too much upper shaft play.
5. Lack of oil.
Adjust the backlash see page
15
Reduce the play.
Adjust the motor belt tension
see page 26.
Reduce the upper shaft play.
Apply a few drops of oil on all
moving parts.
Distorted stitch
pattern.
1. Zigzag timing is not appropriate.
2. Cam follower is not released
enough.
3. Needle thread tension is too tight.
4. Stretch stitch feed is not
balanced.
Adjust the zigzag timing see
page 10.
Adjust the cam follower see
page 22.
Adjust the needle thread
tension see page 7.
Adjust the balance see page
20.
3
FACE PLATE COVER
FACE PLATE COVER
1. Remove the cap A with a needle.
2. Remove the set screw B and remove the face plate.
B
4
BASE COVER
1. Loosen the 4 set screws A and 4 set screws B.
2. Remove the base cover.
5
REAR COVER
1. Remove the face plate (see page 3).
2. Remove the base cover (see page 4).
3. Remove the cap A and remove the set screw B.
4. Raise the presser foot lever.
5. Remove the rear panel.
A
A
A
A
B
6
7
FRONT COVER
1. Remove the rear cover ( see page 5 ).
2. Loosen the set screws A and B.
3. Remove the set screws C, D.
4. Remove the P–nut.
A
B
C
D P
8
NEEDLE THREAD TENSION
The standard needle thread tension should be 110 to 130 g when pulling a cotton
thread size Ne 50/3 with tension gauge in thedirection of B with setting the tension at “5”
(Fig. 1).
1. Remove the face plate (see page 3).
2. Remove the screw A
3. Remove the tension dial.
4. Turn the adjusting nut C in the direction of
D when the needle thread tension is too tight and
E when the needle thread tension is too loose.
Attach the face plate.
D
E
Fig. 1
Fig. 2
A
BOBBIN THREAD TENSION
The bobbin thread tension should be between 25 and 30 g when pulling a size Ne 50/3
cotton thread in the direction of B with tension gauge (ref. Fig. 1).
1. Turn the adjusting screw C in the direction
D when the bobbin thread tension is too tight
E when the bobbin thread tension is too loose
(ref. Fig. 2)
Direction B
Fig. 1
Fig. 2
E
D
C
9
PRESSER BAR HEIGHT
The standard presser bar height is 6.5-6.8 mm between the presser foot and needle
plate when the presser bar lifter is up position (ref. Fig. 1).
1. Remove the face plate (see page 3).
2. Remove the set screw A and remove the lamp socket set plate B.(ref. Fig. 2)
3. Raise the presser bar lifter.
4. Loosen the screw A and adjust the presser bar height.(ref Fig. 3)
5. Tighten the screw A. Make sure that the presser foot is paralleled with the openings
for the feed dog.
6. Attach the lamp socket set plate B and face plate.
6.5
-
6.8
Fig. 1 Fig. 2
B
Fig. 3
10
11
ZIGZAG TIMING
If the machine is adjusted properly, needle should not swing when it is 5 –6.5 mm above
the needle plate.
1. Set the zigzag lever at the maximum (applicable to models 2005 and 2007 only).
Check : Run machine at full speed and observe one of the shiny spots on needle
clamp which must describe a single arch (Fig 1).
If not, proceed as follows:
2. Remove the rear panel (see page 5).
3. Loosen the two screws A (Fig. 2).
4. While holding the worm gear in place, turn the balance to another position.
5. Tighten the two screws A.
6. Attach the rear panel.
Note:
Lateral position of worm gear affect the play between gears.
This play is adjusted at factory in order to avoid noise and mechanical friction.
A
5- 6.5
Fig. 1
Fig. 2
NEEDLE CENTERING
When the straight at the center position is selected, the needle should be at the center
of needle hole of the needle plate.
1. Remove the face plate (see page 3).
2. Select the straight stitch at the center.
(Applicable to models 2003 (see fig. 1)
3. Loosen the set screw A and C.
4. Turn the eccentric pin B to adjust the needle centering.
5. Tighten the set screw A.
(Applicable to model 2005 and 2007 see fig. 2).
6. Loosen the set screw D
7. Loosen the hexagon nut E
8. Turn the eccentric pin F to adjust the needle centering
9. Tighten the set screw D.
10. Tighten the hexagon nut E.
11. Attach the face plate.
A
B
C
D
E
F
Fig. 1 Fig.2
12
13
FEED DOG HEIGHT
When the needle is at highest position with the presser foot at up position, the distance
between the presser foot and needle plate should be 1.0 to 1.2. (ref. Fig. 1).
Remove the Base, Rear and Front cover (see pages 4, 5, and 6).
Set the stitch length dial at “4”.
Higher the presser foot and turn the fly wheel toward you until the feed dog comes to its
highest position.
1. Loosen the hexagon nut A. (ref. Fig. 2).
2. Turn the screw B to adjust the feed dog height.
3. Tighten the hexagon nut screw A.
4. Turn the fly wheel again and check the feed dog height.
Note:
Feed dog height gauge could be used to check this adjustment feed dog should be
closed to the gauge but without moving it (height of the gauge = 1.2 mm).
A
B
1.0-1.2mm
Fig. 1
Fig. 2
14
NEEDLE CENTERING TO NEEDLE PLATE
The needle size 14 (Nm 90) should in the center (forwards / backwards) of the
hole of the needle plate.
1. Remove the face plate (see page 2)
2. Set the pattern selector dial at the left in straight sewing.
3. Loosen hexagonal socket screw A and move the needle bar supporter B to
adjust the centering.
4. Tighten screw A.
5. Check clearance between needle and hook (see page 15) and if it needs a
small correction, loosen the screw A and readjust the position of the needle
bar supporter B in order to have a clearance between 0 –0.15 mm.
6. Tighten screw A.
7. Attach the face plate (see page 2).
B
A
15
CLEARANCE BETWEEN NEEDLE AND SHUTTLE HOOK
The clearance between needle and shuttle hook should be 0 –0.15 mm.
Note : A small correction could be done when doing needle centering to
needle plate (see page 14).
1. Set the pattern selector dial at the left in straight sewing.
2. Remove the rear cover (see page 5).
3. Loosen the hexagon socket screw A and move lower shaft D to the right
slightly (approximately 0.5 mm) and tighten the hexagon socket screw A
slightly.
4. Loosen the two hexagon socket screws B and C and adjust the clearance
by moving the shuttle race body E.
5. Tighten the two hexagon socket screw B and C slightly and set the zigzag
width at the maximum.
6. Turn the flywheel and check if the both clearances between needle drop
position and the spring F is equal as shown. If not, loosen the two hexagon
socket screws B and C and adjust the position of the spring F by turning the
shuttle race body.
7. Tighten the two hexagon socket screws B and C.
8. Loosen the hexagon socket screw A and adjust the backlash of gears. Then
tighten the hexagon socket screw A.
9. Attach the rear cover (see page 5).
A DF B, C E
a = b
NEEDLE BAR HEIGHT
Check:
1. Take out bobbin case and shuttle race cap.
2. Select zigzag and max width stitch.
3. Rotate flywheel until needle is full down in right position.
4. Then slowly raise needle bar to C position, the distance shall be 1 mm.
Adjustment:
1. Remove face plate.
2. Loosen needle bar clamp screw A.
3. Slightly move needle bar up or down until location is 1 mm.
4. Tighten clamp screw A (Torque 15 kg/cm).
Attention:
After completing adjustment, make sure that needle is parallel to shuttle.
1mm
C
A
16
HOOK TIMING
Check:
1. Take out bobbin case and shuttle race cap.
2. Select zigzag and max width stitch.
3. Rotate flywheel until needle is full down in the left needle position.
4. The point of shuttle shall be 3.2 mm to the left of needle (ref. Fig. 1).
Adjustment :
1. Remove rear cover (see page 5).
2. Loosen 2 screw A on drive gear (ref. Fig. 2).
3. Slightly turn driver gear B clockwise to decrease clearance and counter
clockwise to increase clearance.
4. Tighten both screws A and recheck.
3.2mm
Shuttle hook
Fig. 1
A
B
Fig. 2
17
FEED LIFTING CAM POSITION
Check:
1. Turn the flywheel to make needle point position above needle plate.
2. At this time, teeth of feed dog are required to keep same height with of
needle plate surface (ref. Fig.1).
Adjustment:
1. Remove rear cover (see page 5).
2. Loosen feed lifting cam set screw A (Hexagon M5x5).
3. Turn feed lifting cam B up to same height of feed dog teeth and needle plate
surface.
4. Tighten set screw A.
A
B
Fig.1
18
FEED TIMING
Dismantling the Rear cover (see page 5).
The reference mark A of feed cam should be aligned with mark B on the upper
shaft.
1. Loosen screw C.
2. Turn feed cam until marks A and B are aligned as per sketch and tighten
screw C.
3. Attach the rear cover
C
A
C
19
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ELNA 2003 User manual
- Category
- Sewing machines
- Type
- User manual
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