ELNA 3210 Manuale utente

ELNA

3210 - 3230

SERVICE MANUAL

07/03 Printed in Switzerland 395 903-12

Elna International Corps. SA 3210 / 3230 Service manual

Contents

What to do when 1-3

Service Access

Face Cover 4

Top Cover 4

Belt Cover 5

Base 5

Front Cover 6

Rear Cover 7

Mechanical Adjustment

Needle Thread Tension 8

Presser Bar Height and Alignment 9

Needle Swing in Straight Stitch Sewing 10

Needle Swing 11

Needle Position Misalignment 12

Needle Drop Position 13

Stretch Stitch Feed Balance 14

Feed Dog Height. 15

Needle Bar Height 16

Needle Timing to Hook 17

Clearance between Needle and Hook 18

Backlash Between Hook Gear and Lower Shaft Gear 19

Zero Feeding 20

Needle Stop Position (3230 only) 21

Buttonhole Feed Balance . 22

Buttonhole Length 23

Auto-Stop Buttonhole (Model 3230) 24

Replacement and Adjustment of Needle Threader Plate 25

Motor Belt Tension 26

B-Board and Connector Location (Model 3230) 27

Replacement of B-Board and Fuse (Model 3230). 28

Wiring of Terminal in Machine Socket 29

Content

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

1. Skipped

stitches 1. Needle is not inserted

properly.

2. Needle is bent or worn.

3. Incorrectly threaded.

4. Needle or thread is

inappropriate for fabric

being sewn.

5. Sewing on stretch fabric.

6. Presser foot pressure is

too weak.

7. Inappropriate needle bar

height.

8. Inappropriate needle to

hook timing.

9. Inappropriate needle to

hook clearance.

Insert the needle properly.

Change the needle.

Rethread.

Use the recommended

sewing needle and thread.

Use a #11 blue tip needle.

Adjust the presser bar level

to make the pressure

stronger.

See mechanical

adjustment

"Needle Bar Height".

See mechanical

adjustment

"Needle Timing to Hook".

See mechanical

adjustment "Clearance

Between Needle and Hook

Page 16

Page 17

Page 18

2. Fabric not

moving 1. Presser foot pressure is

too weak.

2. Incorrect feed dog

height.

3. Feed dog is in down

position.

4. Thread on bottom side of

fabric is jammed up

5. Feed dog teeth are worn.

Adjust the presser bar level

to make the pressure

stronger.

See mechanical adjustment

''Feed Dog Height".

Raise the Feed dog level.

Make sure to bring both

needle and bobbin thread

under the foot when

starting sewing.

Change the feed dog.

Page 15

Page 01

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

3 Needle thread

breaks

1. Initial sewing speed is

too fast.

2. Thread path is incorrect.

3. Needle is bent or dull.

4. Upper thread tension is

too strong.

5. Needle size is

inappropriate for fabric.

6. Needle eye is worn.

7. Needle hole in needle

plate is worn or burred.

Start with medium speed

Use the proper thread path.

Replace with a new needle.

Adjust needle thread

tension correctly.

Use appropriate needle for

fabric and thread in use.

Change the needle.

Repair the hole or replace

the needle plate.

4 Bobbin thread

breaks.

1. Incorrectly threaded

bobbin.

2. Too much thread is on

the bobbin.

3. Lint is stuck inside the

bobbin holder.

4. Thread quality is too low.

5. Thread is jamming

around the bobbin.

Thread bobbin correctly

Adjust the position of

stopper.

Clean the shuttle.

Change to a higher quality

sewing thread.

Clear out the jamming

thread.

5. Needle breaks. 1. Needle is hitting the

needle plate

2. Needle is bent or worn.

3. Needle is hitting the

shuttle.

4. The fabric moves while

the needle is piercing it,

or the needle zigzags

while in fabric.

5. Fabric is being pulled too

strongly while sewing.

See mechanical adjustment

“Needle Drop Position”

Change the needle

See mechanical adjustment

“Clearance between

Needle and Hook”

See mechanical adjustment

“Needle Swing”.

Guide the fabric gently

while sewing.

Page 13

Page 18

Page 11

Page 02

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

6. Noisy

operation

1. Backlash between

shuttle hook gear is too

great.

2. Lower shaft gear is

loose.

3. Inappropriate belt

tension.

4. Not enough oil.

5. Upper shaft is loose.

See mechanical adjustment

“Backlash between Hook

Gear and Lower Shaft

Gear”.

Eliminate the looseness.

See mechanical adjustment

“Motor Belt Tension”.

Oil all moving parts.

Eliminate the looseness.

Page 19

Page 26

7. Deformed

pattern.

1. Inappropriate feed

balance.

2. Inappropriate zigzag

synchronization.

3. Upper thread tension is

too strong.

See mechanical adjustment

”Stretch Stitch Balance”

See mechanical adjustment

“Needle Swing”.

Adjust the needle thread

tension correctly.

Page 14

Page 11

8. Improper

buttonhole

results.

1. Buttonhole stitch balance

is not correct.

2. Changing to bar tack is

too early or will not work.

See mechanical adjustment

“Buttonhole Feed Balance”.

See mechanical adjustment

“Buttonhole Length”.

Page 22

Page 23

Page 03

Elna International Corps. SA 3210 / 3230 Service manual

FACE COVER

To remove:

1. Remove the cap Aand the screw B.

2. Remove the face cover C.

To attach:

1. Follow the above procedure in reverse.

TOP COVER

To remove:

1. Remove the face cover (see here above).

2. Remove the two screws A

3. Remove the screws Band C

4. Remove the handle with the top cover.

To attach:

5. Follow the above procedure in reverse.

Page 04

Elna International Corps. SA 3210 / 3230 Service manual

BELT COVER

To remove :

1. Remove the face and top cover (see page 4).

2. Remove the cap A.

3. Remove the screw B

4. Pull out the stitch selector D

5. Remove the screw Cand remove the belt cover.

To attach: Follow the above procedure in reverse.

BASE

To remove :

1. Remove the screws Ato F.

2. Remove the base G.

To attach : Follow the above procedure in reverse.

Page 05

Elna International Corps. SA 3210 / 3230 Service manual

FRONT COVER

To remove :

1. Remove the face and belt cover (see pages 4 and 5)

2. Loosen the screw Aand F

3. Remove the screws B, C, Dand E.

4. Remove two connectors for model 3230.

5. Remove the front panel.

To attach : Follow the above procedure in reverse.

Page 06

Elna International Corps. SA 3210 / 3230 Service manual

REAR COVER

To remove:

1. Remove the face cover, top cover and belt cover (see pages 4 and 5)

2. Loosen the screw A

3. Remove the screws B, Cand D.

Page 07

Elna International Corps. SA 3210 / 3230 Service manual

Needle Thread Tension

The standard tension should be 75 to 90 grams when the tension dial is set at "A" (Auto) for Model

3230 or at "4" for Model 3210, measured with a #50 white polyester thread being pulled at

approximately 50 mm/sec. If the tension is outside the standard range, adjust it as follows.

(Make sure the foot is lowered.)

Adjustment procedure:

1. Remove the face cover (see page 4).

2. If the thread tension is too tight: Turn the adjusting screw Cin the direction of A.

3. If the thread tension is too loose: Turn the adjusting screw Cin the direction of B.

4. Attach the front cover.

Page 08

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