Elna 3210 Mechanical Sewing Machine Owners Manuals, User Guides, Instructional Help Documents & Operating Information - sewing_machine_%C2%AE_.pdf
Citation
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 Top Cover Belt Cover Base Front Cover Rear Cover
4 4 5 5 6 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
CONDITION
CAUSE
HOW TO FIX
1. Skipped stitches
1. Needle is not inserted
Insert the needle properly.
Service manual
REFERENCE
Change the needle.
properly. 2. Needle is bent or worn. 3. Incorrectly threaded.
Rethread.
4. Needle or thread is
Use the recommended
inappropriate for fabric
sewing needle and thread.
being sewn.
Use a #11 blue tip needle.
5. Sewing on stretch fabric. Adjust the presser bar level 6. Presser foot pressure is
to make the pressure stronger.
too weak.
7. Inappropriate needle bar
See mechanical adjustment
height.
"Needle Bar Height". 8. Inappropriate needle to
Page 16
See mechanical adjustment
hook timing.
"Needle Timing to Hook". 9. Inappropriate needle to
See mechanical adjustment "Clearance
hook clearance.
Page 17
Page 18
Between Needle and Hook 2.
Fabric not moving
1. Presser foot pressure is
Adjust the presser bar level to make the pressure
too weak.
stronger. See mechanical adjustment
2. Incorrect feed dog
''Feed Dog Height".
height. 3. Feed dog is in down
Raise the Feed dog level.
position. 4. Thread on bottom side of Make sure to bring both fabric is jammed up
needle and bobbin thread under the foot when starting sewing.
5. Feed dog teeth are worn. Change the feed dog.
Page 01
Page 15
Elna International Corps. SA
3210 / 3230
CONDITION
CAUSE
HOW TO FIX
3
1. Initial sewing speed is
Start with medium speed
Needle thread breaks
2. Thread path is incorrect.
Use the proper thread path.
3. Needle is bent or dull.
Replace with a new needle.
4. Upper thread tension is
Adjust needle thread tension correctly. Use appropriate needle for
5. Needle size is inappropriate for fabric.
breaks.
fabric and thread in use.
6. Needle eye is worn.
Change the needle.
7. Needle hole in needle
Repair the hole or replace
plate is worn or burred. Bobbin thread
REFERENCE
too fast.
too strong.
4
Service manual
1. Incorrectly threaded
the needle plate. Thread bobbin correctly
bobbin. 2. Too much thread is on
Adjust the position of stopper.
the bobbin. 3. Lint is stuck inside the
Clean the shuttle.
bobbin holder. 4. Thread quality is too low. Change to a higher quality sewing thread. Clear out the jamming
5. Thread is jamming
thread.
around the bobbin. 5.
Needle breaks. 1. Needle is hitting the
See mechanical adjustment “Needle Drop Position”
needle plate 2. Needle is bent or worn.
Change the needle
3. Needle is hitting the
See mechanical adjustment “Clearance between
shuttle.
Page 13
Page 18
Needle and Hook” 4. The fabric moves while
See mechanical adjustment
the needle is piercing it,
“Needle Swing”.
or the needle zigzags
Guide the fabric gently
while in fabric.
while sewing.
5. Fabric is being pulled too strongly while sewing. Page 02
Page 11
Elna International Corps. SA
3210 / 3230
CONDITION
CAUSE
HOW TO FIX
6.
1. Backlash between
See mechanical adjustment
Noisy operation
shuttle hook gear is too
“Backlash between Hook
great.
Gear and Lower