ELNA 6004 Bedienungsanleitung

Service Manual

September 1997 Printed in Switzerland 395 901- 42

Elna International Corps. SA 6004 Service manual

CONTENT

Disassemble and assemble the external parts

Top cover and Face Plate 1

Base and Bed Cover 2

Belt Cover 3

Front Panel 4

To Replace and Adjustment

Presser Bar Height 5

Needle Centering 6

Needle Bar height 7

Hook and Feed timing 8

Clearance between Needle and Hook 9

Backlash of hook drive gear and lower shaft gear 10

Feed Dog height 11

Upper Shaft Shield Plate position 12

Upper Thread Tension 13

Stretch Stitch Feed balance 14

Needle Threaded Plate 15

Buttonhole Lever and Sensor 16

To replace electrical components

Circuit Board A 17

Circuit Board C 18

Circuit Board C and Fuse 19

DC Motor 20

Transformer 21

Machine Socket 22

Buttonhole Lever 23

Circuit Board K and F 24

Buttonhole Sensor 25

Wiring Diagram 26

General Function Check and Test Program 27-30

Content

Elna International Corps. SA 6004 Service manual

TOP COVER AND FACE PLATE

TOP COVER

1 To remove :

2 Remove the tree set screws Aand Band the Top cover.

3 To attach :

4 Attach the top cover with the tree screws Aand B

FACE PLATE

1. To remove :

2. Remove the two set screws Cand face plate

3. To attach

4. Attach the face plate with two set screws C.

Page 01

Elna International Corps. SA 6004 Service manual

BASE AND BED COVER

BASE

1 To remove :

2 Remove six set screws Aand base.

3 To attach :

4 Attach the bsase with six set screws A

BED COVER

1 To remove :

2 Move the fed drop lever to the left, then remove the two set screws B.

3 Remove the bed cover

4 To attach

5 Move the feed drop lever to the left and attach the bed cover with two set screws B.

Page 02

Elna International Corps. SA 6004 Service manual

BELT COVER

To remove :

1 Remove two set screws Aand belt cover

To attach

1 Attach the belt cover with two set screws A.

Page 03

Elna International Corps. SA 6004 Service manual

FRONT PANEL

To remove :

1. Remove the top cover, belt cover and bed cover (see pages 1, 2 and 3).

2. Remove set screw A and loosen set screws B, C, D, E, F and G.

3. Unplug five (5) connectors and remove the front panel.

H = Connector for circuit board A.

I = Connector for buttonhole sensor

J = Connector for thread tension

K = Connector for circuit board A

To attach

4 Insert five (5) connectors and attach the front panel

5 Tighten the screws.

Page 04

Elna International Corps. SA 6004 Service manual

PRESSER BAR HEIGHT

The standard presser bar height is 6.0 mm between the bottom surface of the foot and

needle plate when presser bar lifter is in up position

1. Open the face plate

2. Raise the presser foot, loosen the presser bar bracket screw A and adjust the height (6.0

mm)

3. Check if the presser foot is parallel to thé openings for thé feed dog in the needle plate. If

not, adjust it

4. Tighten thé presser bar bracket screw while holding thé presser bar so that foot remains

parallel to thé openings

5. Close thé face plate.

Page 05

Elna International Corps. SA 6004 Service manual

NEEDLE CENTRING

When selecting pattern 10, the needle should be in center position of needle slot

in the needie plate, or when the needie swing is in maximum zigzag width, the distance between

both sides of needie slot in the needie plate and the needie positions should be equal.

If not, adjust as follows:

1. Turn on the power switch

2. Select pattern 10 or pattern 14 at maximum zigzag width

3. Loosen the set screw A

4. Turn the eccentric pin B to adjust the needie centering

5. Tighten the set screw A

Note: Check the hook timing after this adjustment

Page 06

Elna International Corps. SA 6004 Service manual

NEEDLE BAR HEIGHT

A regular needie #14 should be used for this adjustment

The distance between the upper edge of needie eye and the tip of shuttle hook should be in the

range of 1.6 - 2.0 mm when the tip of shuttle hook meets the right side of the needie as the

needle is moved up from its left and lowest position by turning the handwheel toward you.

1. Remove the needie plate and bobbin holder

2. Turn on the power switch and select pattern (no. 11)

3. Turn the handwheel toward you until tip of shuttle hook meets the right side of the needie

4. Loosen the needie bar connecting stud set screw A

5. Adjust the height of the needie bar by moving the needie bar upward or downward without

turning it. (Make sure thé needie setting groove of the needie bar is in thé front)

6. Tighten thé set screw A

7. Insert the bobbin holder and attach the needie plate

Page 07

Elna International Corps. SA 6004 Service manual

HOOK AND FEED TIMING

A regular needie B #14 should be used for this adjustment. Select pattern 10. Turn thé

handwheel toward you to position thé needie bar from its lowest position, moving up

approximately 2,30 mm to 2,60 mm. At this position, the tip of the hook should meet the right

side of the needie.

1. Remove thé needie plate and thé bobbin holder

2. Turn on the power switch and select pattern 10

3. Remove thé top cover, belt cover and bed cover. (See pages 1, 2 and 3)

4. Turn the handwheel toward you and set the needle bar to its lowest position

5. In this condition, the peg C on thé feed lifting cam should be in its lowest position

If not.

Loosen the set screws A of upper shaft belt wheel. With the needie bar in its lowest position,

hold the handwheel in place while turning the upper shaft belt wheel to position the peg C on

the feed lifting cam in its lowest position.

Tighten the set screws A of upper shaft belt wheel.

6. Set the needle bar to its lowest position, fit the timing gauge 101360 in contact with the

needle bar cradle, then loosen one of the lower shaft hook gear screw D.

7. Turn the balance wheel slowly forwards until the gauge butts. In this position, the hook

should be between the 2 positions illustrated

8. Unscrew the second screw of lower shaft hook gear and adjust the position of the hook.

9. Tighten the screws D, turn balance wheel several times and recheck the timing and refit the

machine.

Page 08

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