ELNA 792D User manual

INSTRUCTION BOOK

IMPORTANT SAFETY INSTRUCTIONS
When using an electrical appliance, basic safety precautions should always be followed, including the
following:
This sewing machine is designed and manufactured for household use only.
Read all instructions before using this sewing machine.
DANGER— To reduce the risk of electric shock:
1. An appliance should never be left unattended when plugged in. Always unplug
this sewing machine from the electric outlet immediately after using and before
cleaning.
WARNING— To reduce the risk of burns, re, electric shock, or injury to persons:
1. Do not allow to be used as a toy. Close attention is necessary when this sewing machine is used
by or near children.
2. Use this appliance only for its intended use as described in this owner’s manual.
Use only attachments recommended by the manufacturer as contained in this owner’s manual.
3. Never operate this sewing machine if it has a damaged cord or plug, if it is not working properly, if
it has been dropped or damaged, or dropped into water.
Return this sewing machine to the nearest authorized dealer or service center for examination,
repair, electrical or mechanical adjustment.
4. Never operate the appliance with any air opening blocked. Keep ventilation openings of this
sewing machine and foot controller free from accumulation of lint, dust and loose cloth.
5. Never drop or insert any object into any opening.
6. Do not use outdoors.
7. Do not operate where aerosol (spray) products are being used or where oxygen is being
administered.
8. To disconnect, turn all controls to the off (“O”) position, then remove plug from outlet.
9. Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
10. Keep ngers away from all moving parts. Special care is required around the sewing machine
needle and/or cutting blade.
11. Always use the proper needle plate. The wrong plate can cause the needle to break.
12. Do not use bent needles.
13. Do not pull or push fabric while stitching. It may deect the needle causing it to break.
14. Switch this sewing machine off (“O”) when making any adjustment in the needle area, such as
threading the needle, changing the needle, threading the bobbin or changing the presser foot, and
the like.
15. Always unplug this sewing machine from the electrical outlet when removing covers, lubricating, or
when making any other adjustments mentioned in this owner’s manual.
SAVE THESE INSTRUCTIONS
For Europe only:
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
For outside Europe (except U.S.A and Canada):
This appliance is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
Please note that on disposal, this product must be safely recycled in accordance with relevant
National legislation relating to electrical/electronic products. If in doubt please contact your
retailer for guidance. (European Union only)

3
PREPARATION
Names of Parts................................................... 4
Standard Accessories ........................................ 4
Connecting the Machine to the Power Supply ...... 5
Controlling Sewing Speed ................................. 5
For Your Safety .................................................. 5
How to turn the Handwheel ............................... 6
Opening and Closing the Side Cover ................ 6
Opening and Closing the Looper Cover ............ 6
The Position of Thread Guide Bar ...................... 7
Attaching the Spool Holder Cap and Net ............. 7
Changing Needle................................................ 8
Raising or Lowering the Presser Foot ................ 8
Removing the Presser Foot................................ 9
Attaching the Presser Foot ................................ 9
Adjustment of Foot Pressure ............................. 9
Adjustment of Stitch Length ............................ 10
Adjustment of Differential Feed Ratio .............. 10
To Deactivate the Upper Knife .........................11
To Activate the Upper Knife ............................. 11
Adjustment of Cutting Width............................ 12
Adjustment of Needle Plate Setting Knob ....... 13
Threading the Machine ............................. 14~23
• Threading the Lower Looper .................... 15
• Threading the Upper Looper .................... 18
• Threading the Needle on the Right........... 20
• Threading the Needle on the Left .............22
TEST STITCHING
Starting Sewing ................................................ 24
Finishing Sewing .............................................. 24
Sewing Continuously ....................................... 24
How to use Guide Lines ................................... 24
Securing Ends .................................................. 25
Thread Tension (4 threads) ..............................26
Threading the Machine (3 threads) .................. 28
Thread Tension (3 threads) ..............................29
Thread and Needle Chart ................................. 30
TABLE OF CONTENTS
ROLLED HEMMING, PICOT EDGING AND
NARROW HEMMING
Machine Setting and Thread, Fabric and
Range of the Tension Dial ................................ 31
Thread Tension ................................................ 32
For Better Results ............................................ 33
DECORATIVE OVEREDGING
Thread and Fabric ............................................ 34
Machine Setting ............................................... 34
GATHERING
Thread and Fabric ............................................ 34
Machine Setting ............................................... 34
PIN TUCKING
Thread and Fabric ............................................ 35
Machine Setting ............................................... 35
Sewing .............................................................. 35
CARE OF YOUR MACHINE
Replacing the Upper Knife ............................... 36
Cleaning Upper Knife Area............................... 36
Cleaning the Feed Dog .................................... 37
Oiling the Machine ........................................... 38
Carrying the Machine ....................................... 38
Troubleshooting ............................................... 39
APPENDIX ..................................................... 40
OPTIONAL PARTS ........................................ 44

4
Names of Parts
1 Left needle thread tension dial
2 Right needle thread tension dial
3 Upper looper thread tension dial
4 Lower looper thread tension dial
5 Side cover
6 Looper cover
7 Handwheel
8 Power switch
9 Machine socket
10 Differential feed dial
11 Stitch length dial
12 Spool stand
13 Spool holder
14 Spool pin
15 Thread guide bar
16 Thread guide
17 Pressure adjusting screw
18 Presser foot
19 Needle plate setting knob
20 Thread cutter
21 Presser foot lifter
22 Needle plate
23 Upper knife release knob
24 Cutting width adjusting dial
25 Upper looper
26 Lower looper
27 Upper knife
28 Lower knife
Standard Accessories
1 Screwdrivers
2 Tweezers
3 Set of needles
Bonus Accessories
4 Gathering attachment
5 Elastic attachment
6 Blind stitch foot
7 Cording foot (1)
PREPARATION
12
3
1
17
2
15 16
14
13
12
11
10
9
8
7
5
3
46
20
21
22
23
24
19
18
27
28
25
26
6
Standard Accessories
4
7
5
Bonus Accessories

5
Connecting the Machine to the Power Supply
Before connecting the machine to the power supply,
make sure the voltage and frequency shown on the
machine conform to your electrical power.
1. Turn off the power switch, and connect the
machine plug to the machine socket.
2. Connect the power supply plug to your power
supply.
3. Turn on the power switch.
Controlling Sewing Speed
Sewing speed can be varied by the speed controller.
The harder you press on the controller, the faster the
machine runs.
Step on the speed controller with the presser foot
lifter up, and practice controlling the speed.
For Your Safety:
* While in operation, always keep your eye on the
sewing area, and do not touch any moving parts
such as the thread take-up lever, loopers,
handwheel, needle or knives.
* Always disconnect the machine from the power
supply:
— when leaving the machine unattended.
— when attaching or removing parts.
— when threading or cleaning the machine.
* Do not place anything on the foot control,
otherwise the machine will start inadvertently.
1Power switch
2Machine plug
3Machine socket
4Power supply plug
5Power supply
6Speed controller
1Speed controller
2
1
The symbol "O" of a switch indicates the "off" position of
the switch.
5
4
3
2
1
16
1
3

6
How to turn the Handwheel
Always turn the handwheel toward you (Counter-
clockwise).
1Handwheel
Opening and Closing the Side Cover
To open:
Push the side cover to the left.
To close:
Push the side cover to the right.
1Side cover
Opening and Closing the Looper Cover
To open: A
While pushing with the thumb to the right as far as it
will go, pull the looper cover toward you.
To close: B
Lift the looper cover and push it against the
machine.
The looper cover snaps into its position
automatically.
1Looper cover
Note:
Always close both side cover and looper cover
when the machine is in use.
1
1
1
A
B

7
1. Pull the thread guide bar up as far as it will go.
2. Turn the thread guide bar so that the thread
guides are right above the spool pins.
The Position of Thread Guide Bar
1Thread guide bar
2Thread guide
3Stoppers
4Spool pin
Attaching the Spool Holder Cap and Net
(Optional)
1. When you use a small thread spool, pull out the
spool holder from the spool pin. Then place the
spool with its slit side up, and put the spool
holder cap on top of it.
2. If the thread slips down from the spool
during threading and/or sewing, put a net on the
spool as illustrated to prevent jamming.
* The spool holder cap and net are optional
accessories.
1Net
2Spool pin
1Spool holder
2Spool pin
3Spool holder cap
4Slit
1
2
34
13
4
2
1
2
12
1
2
* Make sure to lock the thread guide of guide pole
in the correct position with the two stoppers.

8
Raising or Lowering the Presser Foot
By raising or lowering the presser foot lifter, the
presser foot goes up or down.
* While in operation, keep the presser foot lowered
except when threading the machine or test-
running without threads.
1Presser foot
2Presser foot lifter
Changing Needle
Turn off the power switch and unplug the machine.
Raise the needle to its highest position.
Then loosen the left or right needle clamp screw for the
needle you are going to remove.
1Needle clamp screw on the left
2Needle clamp screw on the right
* Use HA-1SP #14 Needle or #11.
To attach the needle on the right :
Insert a new needle into the needle clamp with the
flat side to the back until the top of the needle
touches the stopper pin, then tighten the needle
clamp screw on the right.
To attach the needle on the left :
Insert a new needle into the needle clamp with the
flat side to the back until the top of the needle
touches the edge of the needle bar, then tighten the
needle clamp screw on the left.
* When the needles are set correctly, the left
needle is higher than the right one.
* Do not use any needle which is bent or blunt.
1Needle clamp
2Needle
3Needle stopper pin
4Edge of needle bar
5Needle clamp screws
6Flat side to the back
1
2
1
2
4
3
4
5
6
1
2
* Use HA-1SP #14 Needle or #11.
6

9
Adjustment of Foot Pressure
It is not necessary to adjust the presser foot’s
pressure for normal sewing.
When you sew heavy or lightweight fabrics, turn the
adjusting screw:
–– clockwise for heavyweight fabric.
–– counterclockwise for lightweight fabric.
* For normal sewing, set the adjusting screw so
that it sits 1mm below the top of the machine.
1To decrease
2To increase
3Adjusting screw
4Top of the machine
Removing the Presser Foot
1. Turn off the power switch and unplug the
machine.
2. Raise the needle and the presser foot.
3. Press the lever located on the back of the foot
holder. The presser foot will drop off.
1Needle
2Presser foot lifter
3Foot holder
4Lever
Attaching the Presser Foot
1. Turn off the power switch and unplug the
machine.
2. Place the presser foot so that the pin on the foot
lies just under the groove of the foot holder.
3. Lower the foot holder to lock the foot into place.
4. Raise the presser foot lifter to check that the
presser foot is secure.
1Groove
2Pin
3Lever
1 mm
2
1
43
3
1
2
2
3
1
2
4

10
Adjustment of Stitch Length
To select stitch length, turn the dial.
The larger the number, the longer the stitch.
The stitch length can be adjusted from 1 to 4 mm.
Position “R” is for rolled and narrow hemmings.
1Stitch length dial
2Setting mark
Adjustment of Differential Feed Ratio
The differential feed ratio can be altered by turning
the dial.
The number on the dial indicates the ratio between
the main and the sub feed motion.
1.0 indicates the neutral position.
1Differential feed dial
2Setting mark
How to adjust
• If the sewn fabric is stretched, turn the dial
counterclockwise (toward 2.2).
• If the sewn fabric is gathered, turn the dial
clockwise (toward 0.5).
1Stretched
2Gathered
1
2
1
2
1
2

11
To Deactivate the Upper Knife
1. Turn off the power switch and unplug the machine.
2. Open both the looper cover and side cover.
3. Turn the upper knife release knob toward you
while pushing it to the right, then guide the hole
on the upper knife to the pin to lock the upper
knife in the down position.
4. Close the looper cover and side cover.
1Upper knife release knob
2Stopper pin
3Upper Knife
To Activate the Upper Knife
1. Turn off the power switch and unplug the machine.
2. Open both the looper cover and side cover.
3. Turn the upper knife release knob away from you
while pushing it to the right, then guide the
groove on the upper knife to the pin to lock the
upper knife in the up position.
4. Close the looper cover and side cover.
1Upper knife release knob
2Stopper pin
1
2
3
1
2

12
Adjustment of Cutting Width
When cutting width is too narrow or too wide against
seam width, adjust it as follows.
1. Turn off the power switch and unplug the
machine.
2. Open the looper cover and side cover.
3. Set the upper knife to down position
4. Turn the cutting width adjusting dial to get
desired position of lower knife.
1Cutting width adjusting dial
2Lower knife
3Standard setting
* The cutting width of this model can be
adjusted approximately 3.0 to 5.0 mm from the
right needle position depending upon your
sewing needs or the fabric being used.
(The cutting width should be adjusted to get
the same results as in drawing 4 .)
When cutting width is too narrow.
Turn cutting width adjusting dial clockwise (A).
Lower knife will move to right.
When cutting width is too wide.
Turn the cutting width adjusting dial counterclockwise
(B).
Lower knife will move to left.
5. Set the upper knife to up position.
6. Close the looper cover and side cover.
1
2
2
3
2
2
(A)
(B)
4

13
Adjustment of Needle Plate Setting Knob
(Changing to Standard Serging or Rolled
Hemming)
1. Turn off the power switch and unplug the
machine.
2. Open the looper cover and side cover.
3. Deactivate the upper knife.
4. Push the cutting width adjusting dial to the right
as far as it will go, then, move the needle plate
setting knob to the guide line of S (for Standard
Serging) or R (for Rolled Hemming).
Release the cutting width adjusting dial to the left
gently.
5. Set the upper knife to up position.
6. Close the looper cover and side cover.
1Chaining finger
2Guide line
3Cutting width adjusting dial
4Upper knife
5Needle plate setting knob
(A) Standard Serging
* The chaining finger is located beside the needle
plate as shown in diagram (A) for guiding the flat
edge of the fabric for overlock sewing.
(B) Rolled Hemming
* Pull the needle plate setting knob from “S” to “R”
position, so that the fabric edge will be rolled for
hemming, picot edging and narrow hemming.
(A)
(B)
1
2
3
5
4
1
5
1
5

14
Threading the Machine
The left illustration shows the completed threading
conditions of four threads.
1Lower looper thread
2Upper looper thread
3Right needle thread
4Left needle thread
5Thread guide
6Thread guide plate
7Threading chart
The machine is pre-threaded to make threading
easier.
Tie the end of a new thread to one of the pre-set
threads, and pull it to draw the new thread through
the machine, following the steps below.
*Turn off the power switch before threading the
machine.
1. Pull the threads from the spools and draw them
through the thread guides, then tie the thread
ends together.
2. Raise the presser foot, draw the threads until the
knots are coming out from under the back of the
presser foot.
3. However, stop drawing the needle threads when
the knots reach just before the needle eye.
Cut the knots and thread the needle eye.
4. Before starting sewing, clear the needle threads
from under the presser foot to make sure they are
not caught below the needle plate.
(Draw the needle threads in the direction A)
Then pull out the threads to the back approxi-
mately 10 cm (4˝) away from the presser foot.
Lower the presser foot, and you are now ready to
sew.
1Thread guide
2Needle
3Needle thread
4Presser foot
5Needle plate
• For re-threading the machine easily, start from the
lower looper, upper looper, right needle and left
needle threads.
Make sure to clear the needle threads out from
below the needle plate and draw them to the
back and under the presser foot about 10 cm (4˝).
4
325
1
6
7
A
2
3
5
1
4

15
1
• Threading the Lower Looper
Open the looper cover and side cover.
Place the spool of thread on the right side spool pin.
* The points to thread for lower looper are marked
in green.
* A convenient threading chart is placed on the
machine body inside the looper cover.
1. Draw the thread through the right side thread
guide from back to front: (A)
* If the thread is coming out from the thread guide
groove, pass the thread through the thread guide
hole again as shown: (B)
1Thread guide
2. Pass the thread through the holes on the right side
of the thread guide plate as illustrated.
2Thread guide plate
3. Pass the thread through the right side of the
looper thread guide, sliding the thread from left to
right.
3Looper thread guide
1
2
3
1
2
3
5
6
7
8
9
11
2
3
(A) (B)
10
4

16
4. Insert the thread between tension discs from the
right. Then pull both sides of the thread firmly to
insert it between tension discs.
5. Pass the thread through lower looper thread
guide (1).
4Lower looper thread tension dial
5Lower looper thread guide (1)
* Make sure that the thread is between the tension
discs.
(1) Thread
(2) Tension discs
6. Pass the thread through lower looper thread
guide (2).
7. Pass the thread through the looper thread
take-up lever (lower).
8. Pass the thread through lower looper thread
guide (3).
9. Pass the thread through lower looper thread
guide (4).
6Lower looper thread guide (2)
7Looper thread take-up lever (lower)
8Lower looper thread guide (3)
9Lower looper thread guide (4)
10. Turn the handwheel toward you until the
lower looper comes to the right, and pass the
threader through the hole on lower looper thread
guide (5).
Hook the end of the thread on the threader.
* Looper threader is optional.
* If you don’t have the looper threader, turn the
handwheel towards you until the lower looper
comes to its most left position.
Thread lower looper thread guide (5) from the
left side with a pair of tweezers. Then, turn the
handwheel towards you to move the lower looper
to the right position.
10 Lower looper thread guide (5)
(1) Lower looper thread
(2) Looper threader
4 5
6789
10
5
4
6
7
8
9
10
(1)
(2)
(1)
(2)
(2)

17
11. Pull the threader to pass the thread through the
hole of lower looper thread guide (5).
Remove the thread from the threader, and draw
the thread through the hole on the lower looper
10 cm (4˝) or more with a pair of tweezers.
* For threading without the looper threader, draw
the thread from the right side of lower looper
thread guide (5) with a pair of tweezers.
* And draw the thread through the hole on the
lower looper 10 cm (4˝) or more with a pair of
tweezers.
11 Lower looper
(1) Looper threader
(2) Tweezers
NOTE: How to thread woolly nylon/polyester thread.
* The illustration at left shows one of the easiest
ways to pass woolly nylon/polyester thread
through the lower looper.
1Lower looper
2Ordinary thread
3Woolly nylon/polyester thread
11
11
1
2
3
(1)
(2)

18
(A) (B)
• Threading the Upper Looper
Place a spool of thread on the spool pin second from
the right.
* The points to thread for upper looper are marked
in red.
* A convenient threading chart is placed on the
machine body inside the looper cover.
1. Draw the thread through the thread guide second
from the right from back to front: (A)
1Thread guide
2. Pass the thread through the holes in the second
row from the right of thread guide plate as
illustrated.
2Thread guide plate
3. Pass the thread through the left side of looper
thread guide sliding the thread from right to left.
3Looper thread guide
1
2
3
4
5
6
9
1
2
3
1
2
3
* If the thread is coming out from the thread guide
groove, pass the thread through the thread guide
hole again as shown: (B)
8
7

19
NOTE:
* When you thread the upper looper only, to avoid
tangled threads pull out both threads over the
needle plate and under the presser foot.
Turn the handwheel toward you until the upper
looper comes to the middle point of its travel, and
unhook the thread of the lower looper from the
upper looper.
Thread the upper looper.
1Lower looper thread
2Upper looper
4. Insert the thread between tension discs from the
right. Then pull both sides of thread.
5. Pass the thread through upper looper thread
guide (1)
4Upper looper thread tension dial
5Upper looper thread guide (1)
6. Pass the thread through upper looper thread
guide (2).
7. Pass the thread through the looper thread
take-up lever (upper).
6Upper looper thread guide (2)
7Looper thread take-up lever (upper)
8. Pass the thread through upper looper thread
guide (3).
9. Holding the end of the thread with a pair of
tweezers, pass it through the hole on the upper
looper. Pull 10 cm (4˝) or more of thread through
the hole.
8Upper looper thread guide (3)
9Upper looper
54
6
7
8
9
12
4 5
6 7
8 9

20
• Threading the Needle on the Right
Place the spool of thread on the spool pin second from
the left.
* The points to thread for needle on the right are
marked in blue.
* A convenient threading chart is placed on the
machine body inside the looper cover.
1. Draw the thread through the thread guide second
from the left from back to front: (A)
1Thread guide
2. Pass the thread through the holes in the second
row from the left of the thread guide plate as
illustrated.
2Thread guide plate
1
2
1
3
4
5
6
2
*If the thread is coming out from the thread guide
groove, pass the thread through the thread guide
hole again as shown: (B)
7
8
2
(A) (B)
1