Sewing Machine Manual DC3050

5/20/2018 Sewing Machine Manual DC3050

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INSTRUCTION BOOK

Model DC 3050


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IMPORTANT SAFETY INSTRUCTIONSWhen using an electrical appliance, basic safety precautions should always be followed, including the

followings:

Read all instructions before using this appliance.

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.

2. Always unplug before replacing a sewing machine bulb. Replace bulb with same type rated 12 Volts,

5 Watts.

WARNINGTo reduce the risk of burns, fire, 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 owners manual.

Use only attachments recommended by the manufacturer as contained in this owners 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 fingers away from all moving parts. Special care is required around the sewing machine

needle.

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 deflect 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 owners manual.

SAVE THESE INSTRUCTIONS

The design and specifications are subject to change without a prior notice.


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KNOW YOUR MACHINEName of Parts ........................................................... 2Standard Accessories ............................................... 3Extension table.......................................................... 3

GETTING READY TO SEWConnecting the Power Supply .................................. 4

Controlling Sewing Speed ........................................ 4 Speed control slider ................................................ 4 Foot control ............................................................. 4Function Buttons and Keys ....................................... 5 Reverse button ....................................................... 5 Auto-Lock button ..................................................... 5 Up/Down needle button .......................................... 5 Mode key ................................................................ 6 Direct pattern selection ........................................... 6Dropping the Feed Dog ............................................ 7Changing the Presser Foot ....................................... 7Detaching and Attaching the Foot Holder................. 7Raising and Lowering the Presser Foot ................... 8Balancing Thread Tension ........................................ 8 Auto tension ............................................................ 8 Manual tension adjustment..................................... 8Changing Needles .................................................... 9Winding the Bobbin................................................. 10 Removing the bobbin ............................................ 10 Setting the spool of thread.................................... 10 Additional spool pin............................................... 10 Threading for bobbin winding ............................... 10 Inserting the bobbin ...............................................11Threading the Machine ........................................... 12Built-in Needle Threader ......................................... 13

Drawing Up the Bobbin Thread .............................. 13

BASIC STITCHESStraight Stitch ......................................................... 14 To sew ................................................................... 14 Changing sewing direction ................................... 14 Securing a seam ................................................... 14 Altering the stitch length ....................................... 15 Altering the needle drop position .......................... 15 Using the seam guide lines .................................. 16 To sew from the edge of thick fabric ..................... 16Variety of Straight Stitches and

Recommended Feet ............................................... 17Zigzag Stitches ....................................................... 18 Altering the stitch width ......................................... 18 Altering the stitch length ....................................... 18Variety of Overcasting Stitches ............................... 19 Overcasting with zigzag stitch .............................. 19 Multiple zigzag stitches (Tricot stitch) ................... 19 Overcasting stitch ................................................. 19 Double overedge stitch ......................................... 20Buttonholes ............................................................. 21Variety of buttonholes ............................................. 21Square buttonhole .................................................. 21 Altering the buttonhole width ................................ 24 Altering buttonhole stitch density .......................... 24Double layer buttonhole.......................................... 24Round end and keyhole buttonholes ...................... 25 Altering the buttonhole width ................................ 25Corded buttonhole .................................................. 26

Button Sewing........................................................ 27Darning .................................................................. 28 To sew a shorter darning ..................................... 28 To adjust the evenness of darning ....................... 28Zipper Sewing ........................................................ 29 Attaching the zipper foot ...................................... 29 Fabric preparation for zipper sewing.................... 29

To sew.................................................................. 29Blind Hem............................................................... 30

DECORATIVE STITCHESKnit stitch................................................................ 32Shell Tucking.......................................................... 32Satin Stitches ......................................................... 32Applique Sewing .................................................... 33Scallop Stitch ......................................................... 33Patchwork .............................................................. 33Smocking ............................................................... 34Fagoting ................................................................. 34Cross Stitch ............................................................ 34Pattern Combination .............................................. 35Correcting Distorted Stretch Patterns .................... 36

CARE AND MAINTENANCEReplacing the Light Bulb ........................................ 36Cleaning the Hook Race ........................................ 37Inserting the bobbin holder..................................... 37Problems and Warning Signals .............................. 38Troubleshooting ..................................................... 39

TABLE OF CONTENTS


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KNOW YOUR MACHINE

Name of Parts1. Direct pattern selection buttons

2. Mode selection button

3. Plus (+) button

4. Minus () button

5. Indicator window6. Spool holder (large)

7. Spool pin

8. Bobbin winding thread guide

9. Thread guide

10. Thread take-up lever

11. Tension regulating dial

12. Face plate

13. Thread cutter

14. Needle threader

15. Needle plate

16. Extension table (accessory storage)

17. Hook cover plate18. Hook cover plate release button

19. Stitch balance adjusting dial

20. Reverse button

21. Auto-lock button

22. Up/down needle button

23. Speed control slider

24. Needle clamp screw

25. Needle

26. Zigzag foot A

27. Foot holder

28. Carrying handle

29. Bobbin winder spindle

30. Bobbin winder stopper

31. Hand wheel

32. Power switch

33. Machine sockets

34. Drop-feed lever

35. Free arm

36. Buttonhole lever

37. Presser foot lifter

38. Hole for additional spool pin

39. Power supply cord

40. Instruction book


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Standard Accessories

The standard accessories are stored in the

extension table.

q Extension table

w Standard accessories

1. Zipper Foot E

2. Satin Stitch Foot F

3. Automatic Buttonhole Foot R

4. Screwdriver

5. Bobbins

6. Set of Needles

7. Seam Ripper

8. Additional spool pin

9. Spool Holder (Large)

10. Spool Holder (Small)

11. Spool stand

12. Felt

Extension tableThe extension table provides an added sewingsurface and can be easily removed for free armsewing.

Attaching extension table

Push the extension table until it snaps into themachine.

1 Projection

2 Hole

Detaching extension table

Pull the table away from the machine, as

illustrated.

Free arm sewing

Free arm sewing is useful for darning socks or

mending knees, elbows or areas of wear in

childrens clothes.


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GETTING READY TO SEW

Connecting the Power Supply

Turn off the power switch.Insert the foot control plug into the machine socket.Insert the machine plug into the machine socket.Insert the power supply plug into the wall outlet.Turn on the power switch.

q Power Switchw Foot Control Pluge Machine Socketr Machine Plugt Power Supply Plugy Wall Outlet

For Your Safety:While in operation, always keep your eyes on thesewing area, and do not touch any moving parts suchas the thread take-up lever, handwheel or needle.Always turn off the power switch and unplug from thepower supply:

- when leaving the machine unattended.- when attaching or removing parts.- when cleaning the machine.

Do not place anything on the foot control, otherwisethe machine will run intermittently.

When the power is turned on, the indicator window willshow a test pattern then will indicate 01.

Controlling Sewing Speed

Speed control slider

You can limit the maximum sewing speed with thespeed control slider according to your sewing needs.

To increase sewing speed, slide it to the right.

To decrease sewing speed, slide it to the left.

Foot control

Pressing on the foot control can vary sewing speed.The harder you press the foot control, the faster themachine runs.

NOTES:The machine runs at the maximum speed set by thespeed control slider when the foot control is fullydepressed.Keep the foot control free from accumulation of lint,

dust and loose cloth.Do not place anything on the foot control.

Operating Instructions:Foot controller Model 21371 is for use with sewingmachine model DC3050.

Operating Instructions:The symbol "O" of a switch indicates the "off" position of a switch.

For appliances with a polarized plug (one blade wider than the other). To reduce the risk of electric shock, thisplug is intended to fit in a polarized outlet only one way. If it does not fit fully in the outlet, reverse the plug. If itstill does not fit, contact a qualified electrician to install the proper outlet. Do not modify the plug in any way.


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wAuto-Lock button

When stitch pattern 01, 02, 10 or 11 has been

selected, the machine will immediately sew locking stitches

and automatically stop when the auto-lock button is

pressed.

When sewing any other stitches, the machine will sew

locking stitches at the end of the pattern being sewn and

automatically stop.

Function Buttons and Keys

qReverse button

When stitch pattern 01, 02, 10 or 11 has been

selected, the machine will sew in reverse while the reverse

button is pressed.

If you press the reverse button when sewing any other

stitches, the machine will immediately sew locking stitches

and automatically stop.

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e eUp/Down needle button

Press this button to bring the needle up or down.

The machine will stop with the needle up or down

depending on the needle position determined by this

button.


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(2) Stitch width adjusting modeThe green light in the middle will light up.The stitch width of the selected pattern will beindicated.To alter the stitch width, press the key.

(3) Stitch length adjusting modeThe green light on the bottom will light up.The stitch length of the selected pattern will beindicated.To alter the stitch length, press the key.

tDirect pattern selection

The 4 most commonly used stitches can be directlyselected by pressing the button under the patternicon.

rMode key

Each time you press this key the mode will change inthe following order:

(1) Pattern selection modeThe green light on the top will be on.

To select the pattern, press the key until thepattern number of the desired stitch is indicated (seethe stitch chart below).

(2)

(3)

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01 02 03 04 05 06 07 08 09 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

25 26 27 28 29 30 31 32 33 34 35 36 37

38 39 40 41 42 43 44 45 46 47 48 49 50

A R A

C A

A A A RA R R A

C A FG G F FA F F F

F F FF F F AF F F AF F

A F FF A F FF F F FA A


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Changing the Presser Foot

CAUTION:Turn OFF the power switch before changing the foot.Always use the proper foot for the selected pattern.The wrong foot can cause the needle to break.

To snap off:Raise the needle and presser foot.Press the red button on the back of the foot holderand the foot will drop.

q Red Button

To snap on:Place the presser foot so the pin on the foot lies justunder the groove of the foot holder.Lower the foot holder to lock the foot in place.

w Groove

e Pin

Each foot is marked with a letter for identification.r Identification Letter

Detaching and Attaching the Foot HolderWARNING:

Turn OFF the power switch before detaching orattaching the foot holder.

To detach:Raise the presser bar and turn the setscrewcounterclockwise to remove the foot holder.

q Setscrew

w Foot holder

To attach:

Align the hole in the foot holder with the threadedhole in the presser bar and insert the setscrewthrough the hole.Tighten the setscrew by turning it clockwise.

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Dropping the Feed Dog

The feed dog can be lowered with the drop-feed leverfor sewing on buttons etc.

Shift the drop-feed lever to the right to lower the feeddog.

Shift the lever to the left to raise the feed dog, it willreturn to the up position when the machine is started.

q Down position

w Up position

e Feed dog

r Hand wheel

NOTE:The feed dog should be in the up position for regularsewing. Turn the handwheel toward you to check ifthe feed dog comes up after setting the lever in the

up position.


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Balancing Thread Tension

Auto tensionThis machine features an Autosetting in the tensioncontrol, which covers a wide range of sewingconditions. Set the tension regulating dial at "A"forgeneral sewing, unless specifically indicated in thismanual.

q Tension regulating dialw Setting mark

Balanced tension:The ideal straight stitch has threads locked between

two layers of fabric.For an ideal zigzag stitch, the bobbin thread does notshow on the right side of the fabric, and the needlethread shows slightly on the wrong side of the fabric.

e Needle thread

r Bobbin thread

t Right side of the fabric

y Wrong side of the fabric

Manual tension adjustment

Manual tension adjustment may be neededdepending on the sewing materials, layers of fabricand other sewing conditions.

Needle thread tension is too tight:-if the bobbin thread appears on the right side of thefabric.Loosen the needle thread tension by moving the dialto a lower number.

Needle thread tension is too loose:-if the needle thread appears on the wrong side of thefabric.Tighten the needle thread tension by moving the dialto a higher number.

Raising and Lowering the Presser Foot

The Presser foot lifter raises and lowers the presser

foot.

You can raise the presser foot about 6 mm (1/4")

higher than the normal up position by exerting more

pressure when lifting the presser foot lifter. Thisallows for easy removal of the presser foot and helps

you to place thick fabric under the foot.

1 Presser foot lifter

2 Normal up position

3 Extra lift

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Changing Needles

CAUTION:Always make sure to turn the power switch off anddisconnect the machine from power supply beforechanging the needle.Raise the needle by pressingthe up/down needle button and lower the presser foot.

Turn off the power switch.

1 Loosen the needle clamp screw by turning itcounterclockwise.Remove the needle from the clamp.

q Needle clamp screw

2 Insert a new needle into the needle clamp with theflat side of the needle to the rear.When inserting the needle into the needle clamp,push it up against the stopper pin and tighten theneedle clamp screw firmly.

w Stopper pine Flat side

To check needle straightness, place the flat side of theneedle onto something flat (a needle plate, glass etc.)The gap between the needle and the flat surfaceshould be consistent.Never use a blunt needle.

r Gap

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FABRIC

Chiffon, Georgette, Fine Lace, OrgandyNet, Tulle

Batiste, Voile, Lawn, Pure Silk, Crepe de Chine,Sheer Crepe, Chambray, Handkerchief Linen,Gingham, Challis, Percale, Wool Crepe, Peau deSoie, Taffeta, Satin, Silk Surah, Satin-backedCrepe, Qiana

Single Knits, Jersey, Swimwear, and Tricot

Leather Suede

Flannel, Velour, Velvet, Muslin, Velveteen,Poplin, Corduroy, Broadcloth, Linen, Chintz,Gabardine, Felt, Terry, Burlap, Quilted Fabrics

Double Knits, (synthetic and natural) StretchVelour, Stretch Terry, Sweater Knits

Leather, Vinyl, Suede

Denim, Sailcloth, Ticking

Double Faced Wool, Heavy Coating, Fake Fur,Drapery Fabrics

Leather, Suede

Canvas, Duck, Upholstery Fabrics

Topstitching for Special Finishes

TYPE of NEEDLE

UniversalBall Point

Blue Tipped NeedleUniversal

Blue Tipped NeedleBall Point

Wedge PointLeather Needle

Universal

Ball Point


Denim Needle

Universal


Universal

Topstitching Needle

WEIGHT

Very Light

Light

Medium

Heavy

Very Heavy

NEEDLE SIZE

9 (65)9 (65)

11 (75)11 (75)12 (80)

11 (75)11 (75)

11 (75)

14 (90)

14 (90)

14 (90)

16 (100)

16 (100)

16 (100)18 (110)

16 (100)

14 (90)

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Winding the Bobbin

Removing the bobbin

1 Slide the hook cover plate release button to theright, and remove the hook cover plate.

q Hook cover plate release button

w Hook cover plate

2 Lift out the bobbin from the bobbin holder.e Bobbin

Setting the spool of threadLift up the spool pin. Place the spool of thread on thespool pin with the thread coming off the spool asshown.

q Large spool holder

Attach the large spool holder, and press it firmlyagainst the spool of thread.

Use the small spool holder to hold narrow or smallspools of thread.

w Small spool holder

Additional spool pinUse the additional spool pin when you need to windthe bobbin without unthreading the machine whileworking on a sewing project.

Insert the additional spool pin into the spool standand then into the hole in the machine.Place the felt on the spool pin and place a spool of

thread on it as shown.q Additional spool pinw Felte Holer Spool stand

Threading for bobbin winding

1 Set the speed control lever at .Guide the thread around the thread guide.

q Thread guide

2 Pass the thread through the hole in the bobbinfrom the inside to the outside. Put the bobbin on

the bobbin winder spindle.w Bobbin winder spindle

3 Push the bobbin winder spindle to the right.The indicator will show .

4 Hold the free end of the thread in your hand anddepress the foot control.Stop the machine after the bobbin has spunseveral times, and cut the thread close to the holein the bobbin.

5 Depress the foot control again. When the bobbinis fully wound, it will stop automatically.Release the foot control and return the bobbinwinder spindle to its original position by moving itto the left, and cut the thread with a pair ofscissors. Remove the bobbin from the bobbinwinder spindle.

NOTE:The machine will not sew until the spindle has beenreturned to the left.

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Inserting the bobbin

1 Place the bobbin in the bobbin holder with the

thread running off counterclockwise.

q Thread

w Bobbin holder

2 Guide the thread into the notch on the front of the

bobbin holder.

e Notch on the front

3 Draw the thread to the left, sliding it between

the tension spring blades.

r Spring blades

4 Continue to draw the thread lightly until the thread

slips into the notch on the side.

t Notch on the side

5 Pull out about 10 cm (4") of thread to the rear.

Reattach the hook cover plate.

NOTE:

A threading chart is shown on the hook cover plate

for your reference.

y Threading chart


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1 Draw the thread from the spool. Hold the upper

thread at the spool with your finger.

q Hold the thread

2 Slip the thread under the thread guide from the

right and down along the right channel.

Be sure that the thread passes between the

tension disks.

w Thread guide

e Right channel

r Tension disks

3 Then draw the thread around the bottom of the

thread guide plate.

t Thread guide plate

4 Firmly draw the thread up along the left channel to

the take-up lever and down into its eye from the

right to the left.

y Thread take-up lever

5 Then down through the lower thread guide.

u Lower thread guide

6 Slide the thread behind the needle bar thread

guide on the left.

i Needle bar thread guide

7 Thread the needle from front to back by hand or

use the built-in needle threader (see page 13).

Raise the presser foot.

Press the Up/Down needle

button to raise the thread

take-up lever to its highest

position.

Threading the Machine

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Drawing Up the Bobbin Thread

1 Raise the Presser Foot Lifter.

Turn the power switch on.

2 Hold the needle thread with your finger and press

the Up/Down needle button twice to pick up the

bobbin thread.

Draw up the needle thread to bring up a loop of the

bobbin thread.

q Needle thread

w Bobbin thread

e Up/Down needle button

3 Slide 10 cm (4") of both threads to the back under

the presser foot.

Built-in Needle Threader

1 Raise the needle to its highest position by turningthe hand wheel toward you.Turn the power switch off.Lower the presser foot.Depress the needle threader knob as far as it willgo. The hook comes out through the needle eye

from behind.q Needle threader knobw Hook

2 Draw the thread down around the threader guideand under the hook.

e Threader guide

3 Release the threader knob slowly while holding the

thread end with your hand. A loop of the thread ispulled up through the needle eye.

4 Remove the loop from the threader and pull out thethread end from the needle eye.

NOTES:The automatic threader works well with the threads#50-90 and needles #11-16, as well as the blue tippedneedle.

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Securing a seam

For fastening the beginning of a seam, press thereverse button and sew several reverse stitches.Release the reverse button to sew forward.

w Reverse button

For fastening the ends of a seam, press the reversebutton at the end of the seam.Sew a few stitches in reverse to fasten the seam.

Raise the presser foot and pull the fabric to the backto remove it.

To cut the threads, pull the fabric to draw the threadsup to the thread cutter as shown.The threads are cut a proper length to start the nextseam.

e Thread cutter

When pattern #03 (lock-a-matic stitch) is selected:

The machine will sew reverse stitches at thebeginning of a seam automatically, and at the end ofthe seam by pressing the reverse button once.

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BASIC STITCHES

Straight Stitch

To sew

Raise the presser foot and position the fabric next toa seam guide line on the needle plate. Lower theneedle into the fabric where you wish to start.

Pull the needle and bobbin threads to the back.Lower the presser foot.

Depress the foot control to start sewing. Gently guidethe fabric along the seam guide line.

Changing sewing direction:

Stop the machine a few stitches before the end of aseam. Press the up/down needle button a few timesuntil the needle falls on the end of the seam.

q Up/Down needle button

Raise the presser foot.

Pivot the fabric around the needle to change thesewing direction as desired.Lower the presser foot and start sewing in a newdirection.

q w Machine Settingsq Pattern: #01w Presser foot: Zigzag foot A


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Altering the needle drop position

The needle drop position of the following stitches can

be altered:

Press the mode key to activate stitch width

adjustment (the middle green light lights up).

The preset value "3.5" will be indicated.

Press the plus (+) key to move the needle drop to the

right.

Press the minus () key to move the needle drop to

the left.

Altering the stitch length

The stitch length can be altered between 0.0 and 5.0.

Press the mode key to activate stitch length

adjustment (the bottom green light lights up).The preset value 2.2 will be indicated.

Press the plus (+) key to increase the stitch length.

Press the minus () key to decrease the stitch length.


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To sew from the edge of thick fabric:

The black button on the zigzag foot locks the foot inthe horizontal position.This is helpful when starting sewing from the extremeedge of thick fabrics or sewing across a hem.

Lower the needle into the fabric at the point where youwish to start sewing.

Lower the foot while pushing in the black button.The foot will be locked in the horizontal position to

avoid slipping.

The foot will be unlocked after sewing a few stitches.

q Black button

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15 20 4/8 5/8 6/8

1.5 2.0

4/8 5/8 6/8

Number

Distance(cm)

Distance(inch)

The seam guides on the needle plate and hook coverhelp you to measure seam allowances.

NOTE:The number indicates the distance from the centerneedle position.

q Guide linesw Center needle positione Edge of the fabric

Using the seam guide lines


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#01, #02 Straight stitch: Zigzag foot A

Pattern #01 is for seaming and for zipper sewing.

Pattern #02 is for seaming edge of fabrics.

#03 Lock-a-matic stitch:Zigzag foot A

Use this stitch to secure the beginning and the end of a seam withbackstitching.When you reach the end of the seam, press the Reverse Button once.The machine will sew four reverse stitches, four forward stitches, andthen stop sewing automatically.

#04 Locking stitch:Zigzag foot A

This unique stitch is used where an invisible locking stitch is needed.Lower the needle close to the front edge of the fabric.The machine will sew several locking stitches in place and continuesewing forward.When you press the reverse button at the end of the seam, the machinewill sew several locking stitches in place, then stop sewing automatically.

#05 Stretch stitch:Zigzag foot A

This is a narrow stretch stitch designed to eliminate puckering on knitfabrics and bias seams, while allowing the seam to be pressedcompletely open flat.

#18 Triple stretch stitch: Zigzag foot AThis strong, durable stitch is recommended for areas where bothelasticity and strength are needed to ensure comfort and durability.Use it to reinforce areas such as crotch and armhole seams.Also use it when constructing items such as backpacks for extrastrength.

Variety of Straight Stitches and Recommended Feet

#21 Saddle stitch: Zigzag foot A

This saddle stitch is formed with one stitch forward, two stitches backward,and a fourth stitch forward.You can achieve an attractive hand-worked look when topstitching suits,blazers, jumpsuits, and denim outfits with the saddle stitch.

#19 New sculpture stitch: Satin stitch foot F

This stitch is used for topstitches and outline-stitches enhancing thedesign appearance.

#20 Sculpture stitch: Satin stitch foot F

This stitch is used for topstitches and outline-stitches enhancing thedesign appearance.


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Altering the stitch length

The stitch length can be altered between 0.0 and 5.0.

Press the mode key to activate stitch lengthadjustment (the bottom green light lights up).The preset value 2.0 will be indicated.

Press the plus (+) key to increase the stitch length.

Press the minus () key to decrease the stitch length.w Stitch length

NOTE:

The stitch length and width can be altered whilestitching.

Altering the stitch width

The stitch width can be altered between 0.0 and 7.0.

Press the mode key to activate stitch lengthadjustment (the middle green light lights up).The preset value "5.0" will be indicated.

Press the plus (+) key to increase the stitch width.

Press the minus () key to decrease the stitch width.

q Stitch width

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Zigzag Stitch

The zigzag stitch is used for various sewing needs

including overcasting. It can be used on most woven

fabrics.

A dense zigzag stitch can also be used for appliqu.

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Machine Settings

q Pattern: #10w Presser foot: Zigzag foot A


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Variety of Overcasting Stitches

Multiple zigzag stitch (Tricot stitch)

This stitch is used to finish a raw edge of syntheticsand other stretch fabrics that tend to pucker.Sew along the fabric edge leaving an adequate seamallowance.

After sewing, trim the seam allowance close to thestitches.

Overcasting stitch

This stitch can be used to simultaneously seam andovercast edges of fabrics.Use this stitch when you do not need to open seams flat.Place the fabric edge next to the guide of the foot andthen sew.

q Guide

NOTES:The overedge foot is an optional item.When overcasting with the zigzag foot, carefullyguide the fabric so the needle falls off the edge whenit swings to the right.

Overcasting with zigzag stitch

Place the fabric edge next to the guide of the foot andthen sew.

q Guide

NOTES:The overedge foot is an optional item.When overcasting with the zigzag foot, carefully guide

the fabric so the needle falls off the edge when itswings to the right.

CAUTION:When you use the overedge foot C, you must set the zigzag width at 5.0or wider to prevent the needle from hitting the wires on the foot.

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Machine Settingsq Pattern: #10w Presser foot: Zigzag foot A or

Overedge foot C (optional item)

Machine Settings

q Pattern: #11w Presser foot: Zigzag foot A




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Double overedge stitch

This is an excellent stitch for fabrics that tend to fray

extensively such as linens and gabardines.

Two rows of zigzag stitches are simultaneously sewn

over the edge to insure that fabric will not ravel.

Place the fabric edge next to the guide of the foot and

then sew.

NOTES:The overedge foot is an optional item.

When overcasting with the zigzag foot, carefullyguide the fabric so the needle falls off the edge whenit swings to the right.

q w

CAUTION:When you use the overedge foot C, you must setthe zigzag width at 5.0 or wider to prevent theneedle from hitting the wires on the foot.




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Buttonholes

Variety of buttonholes

#06 Square buttonholeThis square buttonhole is widely used on medium toheavy weight fabrics.The buttonhole size is automatically determined byplacing a button in the rear of the foot.

#07 Round-end buttonholeThis buttonhole is used on fine to medium weightfabrics especially for blouses and childrens clothes.

#08 Keyhole buttonholeThe Keyhole Buttonhole is widely used on medium toheavy weight fabrics. It is also suitable for larger andthicker buttons.

Square buttonhole

NOTES: The size of a buttonhole is automatically set by

placing a button in the rear of automatic buttonholefoot R.

The button holder of the foot takes a button size of0.5 cm (3/16 ) to 2.5 cm (1) in diameter.

It is sometimes necessary to change the buttonholesize to match certain heavy or specific fabrics andthreads.

Make a test buttonhole on an extra piece of thefabric to check your settings.

The preset width of the buttonhole is suitable forordinary buttons.

Apply an interfacing to stretch or fine fabrics.

Machine Settings

q Pattern: #06w

Presser foot: Automatic buttonhole foot R

q w


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To sew

1 Press the up/down needle button to raise theneedle.Attach the automatic buttonhole foot R snappingthe pin into the groove of the foot holder.

q Groove

w Pin

2 Pull the button holder to the back, and placethe button in it. Push it together tightly to thebutton.

NOTE:If the button is extremely thick, make a testbuttonhole on an extra piece of the fabric.If it is difficult to fit the button through the testbuttonhole, you can lengthen the buttonhole bypulling the button holder back a little. The length ofthe buttonhole will be increased.

e Button Holderr Extra gap

3 Pull the buttonhole lever down as far as it will go.t Buttonhole Lever

4 Insert the corner of the fabric under the foot.Press the up/down needle button twice.Remove the fabric to the left to draw the needlethread through the hole of the foot.Place the garment under the foot, and lower theneedle at the starting point of the buttonholemark.Then lower the automatic buttonhole foot R.

y Buttonhole Marku Starting Point

NOTE:Make sure there is no gap between the slider andstopper, otherwise the left and right lengths will bedifferent.

i Slidero No gap!0 Stopper!1 Sewing gap

4

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!0

!1

1

2

A

B

3

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5 Start the machine to sew the buttonhole.The buttonhole will be automatically sewn.

Step 1: The machine will sew the front bartack andthe left row first.Then it goes back to the starting point withstraight stitch.

Step 2: The machine will sew the right row.Step 3: The machine will sew the back bartack.Step 4: The machine will stop automatically and a dot

will blink.

!2 Blinking dot

To sew another buttonhole, raise the presser foot.Move the fabric to where the next buttonhole is to besewn, then lower the foot and start the machine.

6 Remove the fabric and place a pin just below thebartack at each end to prevent accidentallycutting stitches. Cut the opening with the seamripper. Use an eyelet punch to open akeyhole buttonhole.

!3 Pin!4 Seam ripper!5 Eyelet punch

7 When buttonhole sewing is finished, push the

buttonhole lever upward as far as it will go.t Buttonhole lever

5

!2

!3!4

6

7

!5

NOTE:If you select other pattern without raising the presserfoot or buttonhole lever after buttonhole sewing, theindicator will show a warning sign.Raise the presser foot and buttonhole lever, thenselect the pattern.

t

Step 1

Step 2

Step 3

Step 4


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Altering the buttonhole width

Press the mode key to activate the stitch widthadjustment.Press the plus (+) key to increase the buttonholewidth.Press the minus () key to decrease the buttonhole

width.q Narrower buttonholew Wider buttonhole

* The width can be altered between 2.5 and 7.0.

Altering the buttonhole stitch density

Press the mode key to activate the stitch lengthadjustment.Press the plus (+) key to make the stitch sparser.Press the minus () key to make the stitch denser.

* The stitch density can be altered between 0.2 and 0.8.

NOTE:The indicator shows the stitch width or density whilesewing. When the buttonhole is completed, theindicator will show the pattern number .

q w

Double layer buttonhole

To make a solid and sturdy buttonhole, sew anotherlayer of buttonhole over the previous stitches.After the buttonhole is finished, simply start themachine again.Do not raise the foot or buttonhole lever.

The machine will sew another buttonhole in thefollowing order and stop automatically when it iscompleted:Step 1:Straight stitching in reverse to go back to the

starting pointStep 2:Front bartack and left rowStep 3:Right rowStep 4:Back bartack and locking stitches at the end

The machine will stop automatically.

NOTE:

A double layer buttonhole can be sewn when the dotis blinking.

Step-1

Step-2

Step-3

Step-4


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Round-end buttonhole

Press the mode key to activate the stitch widthadjustment.Press the plus (+) key to increase the buttonholewidth.Press the minus () key to decrease the buttonholewidth.

q Narrower buttonholew Wider buttonhole


Keyhole buttonhole

Press the mode key to activate the stitch widthadjustment.Press the plus (+) key to increase the buttonholewidth.Press the minus () key to decrease the buttonholewidth.

q Narrower buttonholew

Wider buttonhole


* See page 24 for altering the stitch density.

The sewing procedure is the same as the square

buttonhole #06.

q Starting point

w Bartacking

w

w

q

q

q

w

q

w

Round end and keyhole buttonholes

Machine Settings

q Stitch pattern: #07 or #08

w Foot: Automatic buttonhole foot R

Altering the buttonhole width

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5 Remove the fabric from the machine and cut thesewing threads.

6 Pull the left end of the filler cord to tighten it.Thread the end of the cord through a darningneedle and draw it to the wrong side of the fabricand cut.

Corded buttonhole

To sew a corded buttonhole, follow the same

procedure as for a square buttonhole.

1 With the automatic buttonhole foot R raised, hookthe filler cord on the spur on the back of thebuttonhole foot.

2 Bring the ends of cord toward you under thebuttonhole foot clearing the front end.Hook the ends of the filler cord into the forks onthe front of the buttonhole foot to hold them tight.

q Spurw Forkse Cord

3 Lower the needle into the garment where thebuttonhole will start and lower the foot.

4 Lower the buttonhole lever and buttonhole foot.Start the machine and sew the buttonhole over thefiller cord.

The machine stops automatically when finished.

NOTES:Set the stitch width in accordance with the thicknessof the filler cord used.To cut the buttonhole opening, refer to page 23.

1 2

q

e

w

q w

Machine Settingsq Pattern: #06w Presser foot: Automatic buttonhole foot R

5

3 4

6


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Button Sewing

Unthread the needle thread.

Adjust the stitch width so that the needle entersboth holes in the button.

Place a button on the fabric and lower the needleby turning the handwheel, so that the needleenters into the left hole in the button.

Align the holes in the button with the slot on thefoot and lower it to hold the button in place.

Turn the handwheel to lower the needle into theright hole in the button.Adjust the stitch width if necessary.Rethread the machine and sew about 10 stitchesat a slow speed (set the speed control slider at ).

Raise the presser foot and remove the fabric.

Trim both needle and bobbin threads at thebeginning.Cut both threads leaving 20 cm (8) tails.

Pull the bobbin thread to bring the needle thread tothe wrong side of the fabric then knot the threads.

After sewing is finished, raise the feed dog.

e

Machine Settingsq Pattern: #10w Presser foot: Satin stitch foot Fe Feed dog: Down

q w


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r

y

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t

Darning

Pull the button holder to the rear.

Place the fabric under the foot.Press the up/down needle button twice. Pull the fabricfrom the left to draw both threads under the foot andplace the fabric back under the foot.

Lower the needle at the starting point then lower thefoot.

q Button Holderw Starting Point

Depress the foot control and the machine will sew adarning 2 cm (3/4) long and stop automatically.

e Darning length (Maximum: 2 cm)r Darning width (0.7 cm)

The same sized darning can be sewn when the dot isblinking.

t Blinking dot

Repeat sewing in a different direction until the

darning covers the rip or hole.

To sew a shorter darning

To sew a darning shorter than 2 cm (3/4), first stopthe machine after sewing the required length, thenpress the reverse button.The required length has been determined.

Restart the machine and continue sewing until themachine stops automatically.

y Reverse Buttonu Required Length

To adjust the evenness of darning

The evenness of darning may vary depending on thesewing conditions, such as type of fabrics, number oflayers etc.

(A): If the left corner is lower than the right side, pressthe minus () key to correct it.

(B): If the right corner is lower than the left side, pressthe plus (+) key to correct it.

NOTE:The evenness can be adjusted within d1 to d9(default setting is d5).

(A) (B)

Machine Settingsq Pattern: #09w Presser foot: Automatic buttonhole foot R

q w


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Zipper Sewing

Attaching the zipper foot

(A) Attach zipper foot E with the pin on the right-hand side to the groove to sew the left side ofthe zipper.

(B) Attach zipper foot E with the pin on the left-hand side to the groove to sew the right side ofthe zipper.

q Pinw Groove

Fabric preparation for zipper sewing

1 Add 1 cm (3/8) to the zipper size. This is theoverall opening size.

q Right side of the fabricw 1 cm (3/8)e Opening sizer Zipper sizet Slidery Zipper teeth

u Zipper tapei Wrong side of the fabrico End of the opening

2 Place the right sides of the fabric together andsew to the end of the zipper opening. Fasten theseam with reverse stitching.Increase the stitch length manually to 5 mm(3/16) and loosen the tension to 1 to sew thezipper opening with basting stitches.

!0 2 cm (13/16) seam allowance!1 Basting stitches!2 Reverse stitches

!3 End of opening!4 Seam line

CAUTION:

When sewing with the zipper foot, make sure to usepattern "01 (straight stitch with the center needleposition). Otherwise the needle may hit the foot andpossibly break.

t

y

u

r

o

q

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w

!2

!4

!3

!1

!0

yt

u

q

w

r

1

q

1

2

qw

(A)(B)

e

To sew

1 Fold back the left seam allowance. Turn under theright seam allowance to form a 0.2 to 0.3 cm (1/8")fold. Place the zipper teeth next to the fold andpin it in place.

q Lower fabricw End of the zipper openinge Zipper teethr 0.2 to 0.3 cm (1/8)t Wrong side of the upper fabricy Opening sizeu Fold

q w

Machine Settingsq Pattern: #01w Presser foot: Zipper foot E


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4 Close the zipper and spread the fabric open flatwith the right side up.Baste the upper fabric and zipper tape together.

!0 Basting

5 Reattach zipper foot E with the left pin.Sew 1 cm (3/8") across the end of the opening withreverse stitches. Stitch through the fabric andzipper tape.

!1 End of the opening

6 Stop sewing about 5 cm (2) from the top of thezipper.Lower the needle slightly into the fabric, raise thefoot, remove the basting stitches and open thezipper.

!2 Basting Stitches

7 Move the slider behind the presser foot.Lower the presser foot and stitch the remainder ofthe seam.After finishing, remove the basting stitches.

!0 Basting stitches

3

4

5 6

7

2

i

o

!0

!2

!1

2 Set the stitch length back to 2.2 and threadtension to "A".Attach zipper foot E with the pin on the right-hand side.Sew through the fold and zipper tape guiding thezipper teeth along the edge of the foot.

3 Stop sewing 5 cm (2") before the foot reaches theslider on the zipper tape.Lower the needle slightly into the fabric.Raise the foot and open the zipper.Lower the foot and stitch the remainder of theseam.

i Slidero 5 cm (2)

!0

1 cm (3/8")


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Blind HemMachine settings

q Stitch pattern: #15 or #16

w Foot: Blind hem foot G (optional item)

q

w w

q

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rt

y

1

2

3

4

Starting to sew1 On heavy weight fabrics that ravel, the raw edge

should be overcast first.Fold the hem leaving a 0.4 0.7 cm margin asillustrated.

q Wrong side of fabricw 0.4~0.7 cm (1/8~1/4)

2 Place the fabric so the needle just pierces the

edge of the fold when the needle swings to the left.

Lower the presser foot.

3 There is a sliding guide on the blind hem foot that

allows you to precisely control where the

needle pierces the edge of the fabric fold.

Turn the screw to align the left side of the guide

on the foot with the fold.

Sew, guiding the folded edge along the guide

on the foot.

e Guide screw

r Guide

t Fold edge

4 Open the fabric after sewing.

y Right side of fabric

* If the needle pierces too far left, the stitches will

show on the right side of the fabric.

NOTE:

When sewing a blind hem with the zigzag foot, care-

fully guide the fabric so the needle just pierces the

edge of the fold.

NOTE:The blind hem foot is an optional item.


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Knit Stitch

This stitch is recommended for sewing such fabrics as

synthetic knits and stretch velour as it provides the

greatest amount of elasticity and strength.

Sew along the fabric edge leaving an adequate seam

allowance. After sewing, trim off the seam allowance

close to the stitches.

For better sewing results, interfacing should be used on

the wrong side of fabric on stretch or

elastic fabrics.

Press auto-lock button while sewing the last pattern, and

machine will stop automatically after the last pattern is

finished.

Satin Stitch

Machine Settingsq Pattern: #13w Presser foot: Zigzag foot A

q w

Machine Settings

q Pattern: #22 to #27

w Presser foot: Satin stitch foot F

DECORATIVE STITCHES

Shell Tucking

Machine Settings

q Pattern: #17


e Thread tension: 68

Increase the needle thread tension to 6-8.

Fold and stitch on the bias.

Place the folded edge of the fabric along the slit of

the foot so that the right swing of the needle falls off

the edge of the fabric to form tucks.

After sewing, open the fabric and iron tucks to one

side.

q w e

q w


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Patchwork

Machine Settingsq Pattern: #34 or #38w Presser foot: Satin stitch foot F

Applique Sewing

Place the applique on the fabric and baste it inplace. Sew, guiding the edge of the applique alongthe slit on the foot, so that the needle falls off theedge of the applique when it swings to the right.

NOTE:When changing the sewing direction at a corner orcurve, lower the needle into the applique at the leftswing and turn the fabric to a new direction.

Sew the seam with straight stitch and press seam

allowance to open. Sew pattern #34 or #38 on the

right side of garment centering over the seam line.

Machine Settingsq Pattern: #28 to #31w Presser foot: Satin stitch foot F

q w

q w

Scallop Stitch

Machine Settings

q Pattern: #33

w Presser foot: Zigzag foot A

Starting to sew

Sew the stitches approximately 3/8 (1 cm) inside

of the edge of fabric.Trim the outside of the stitches as shown.

* Make sure you dont cut the thread.

q w


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Fagoting

Machine Settings

q Pattern: #41 or #42


Smocking

Machine Settings

q Pattern: #36 or #43 to #45


Smocking is a delicate, decorative treatment onchildrens clothes or womens blouses.Choose a soft, lightweight fabric such as batiste,gingham or challis. Cut the fabric three times theprojected width. Set the stitch length at 4.0 and sewstraight lines 3/8(1cm) apart across the area to besmocked. A looser needle thread tension will makegathering easier.Knot the threads along one edge. From the otherend, pull the bobbin threads to distribute the gathersevenly. Secure the threads at the other end.Sew the smocking stitches between the straightseams.Remove the straight stitches by pulling them out.

Use this stitch to join two pieces of fabric to create an

open work appearance and add design interest.

Fold under each fabric edge 5/8 (1.5 cm) and press.

Pin the two edges to paper or tear away backing 1/8

apart.

Sew slowly, guiding the fabric so the needle catches

the folded edge on each side.

After finishing the sewing, take off the paper.

Cross StitchMachine Settings

q Pattern: #49


You can make cross stitch designs with this pattern,

in half the time it would take if embroidered by hand.

To alter the size of cross stitch pattern, activate

stitch adjustment mode and press the plus (+) or

minus () key.* If you press the auto lock button before sewing, the

machine will sew one unit of the cross stitch and

stop automatically.

q w

q w

q w


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q

Pattern Combination

To combine 2 units of pattern #27 and one unit ofpattern #47:

1 Sew pattern #27 and press the auto-lock buttonwhile sewing the second unit.The machine will stop automatically when thesecond unit is completed.

q Auto-lock button

2 Select pattern #47. Press the auto-lock button andstart sewing.

3 Machine will sew one unit of pattern #47 and stopautomatically.

4 Repeat steps above.

Machine Settingsq Pattern: #27 and #47 (example)w Presser foot: Satin stitch foot F

q w

1

2

3


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Replacing the Light Bulb

WARNING:Turn the power off before replacing the lightbulb.The bulb could be HOT, wait until it has cooleddown before touching it.

To remove:

Remove the cap and setscrew.Unhook the hook from the rear cover and remove thefaceplate.

q Capw Setscrewe Rear coverr Hookt Face plate

Pull out the light bulb from the lamp socket.y Light bulbu Lamp socket

To replace:Insert the bulb into the opening of the socket.Attach the face plate inserting the ribs and hook intothe rear cover. Secure the face plate with the

setscrew, and attach the cap.

NOTE:Replace the bulb with the same type rated 12V, 5W(part number 000026002).

Correcting Distorted Stretch Patterns

The sewing results of the stretch patterns may varydepending upon the sewing conditions, such assewing speed, type of the fabric, number of layersetc.Always test sew on a scrap piece of the fabric that

you wish to use.

If stretch stitch patterns are distorted, correct it withthe feed balancing dial.

q Feed balancing dialw Neutral positione Setting mark

Example:Pattern #34

(A): If the pattern is compressed, turn the feedbalancing dial in the direction of +.

(B): If the pattern is drawn out, turn the feedbalancing dial in the direction of .

q

w

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er

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u

(A) (B)

CARE AND MAINTENANCE


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Cleaning the Hook Race

WARNING:Turn the power switch off and unplug the machinebefore cleaning.

NOTE:Do not dismantle the machine in any way other thanwhat is explained in this section.

1 Remove the setscrew on the needle plate with ascrewdriver. Remove the needle plate.q Screwdriverw Setscrewe Needle plate

2 Take out the bobbin. Lift up the bobbin holder andremove it.

r Bobbin holder

3 Clean the bobbin holder with a lint brush.

t Lint brush

4 Clean the feed dog and hook race with the lint brush.

y Feed dogu Hook race

5 Clean the hook race with a soft dry cloth.(You may also use a vacuum cleaner.)

Inserting the bobbin holder

1 Insert the bobbin holder.

2 The knob of the bobbin holder should fit next to thestopper in the hook race.

q Knobw Stopper

3 Reattach the needle plate, aligning the needle plateguide pins with the guide holes in the needle plateand tighten the setscrew.

e Guide pinsr Guide holes

NOTE:After cleaning the machine, make sure the needle andpresser foot are attached.

1

2

3

4

5

1

3

2

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The power is turned on with the foot control not

being connected.

The foot control is disconnected while sewing.

Connect the foot control and restart

the machine.

Problems and Warning Signals

If a buzzer sounds and the indicator shows a warning sign, follow the guidance below.

The machine is re-started too soon after it

has halted due to the overload.

Wait for at least 15 seconds to restart.

If threads are jamming, remove

jammed threads.

The machine is malfunctioning due to a

problem in the electronic components.

Contact the service center or the

store from where the machine waspurchased.

Warning signal

Selecting a pattern after buttonhole is completed

with the buttonhole lever still lowered.

The bobbin winder spindle is shifted to the right

for bobbin winding.

Raise the buttonhole lever and re-

select the pattern.

Return the bobbin winder spindle

to the left.

Audible signal

Pip

Pip-pip-pip

Pip-pip-peep

Peep

The buzzer sounds when:

Normal operation

Invalid operation

Buttonhole sewing completed

Malfunction

It is not abnormal that a faint humming sound is coming out from the internal motors.

The pattern selection key area may become warm when the machine has been used for hours.

Problem Try this


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Condition Cause Reference

The needle breaks.

Skipped stitches

Seam puckering

The cloth is not fed

smoothly.

The needle threadbreaks.

The bobbin threadbreaks.

1. The needle thread is not threaded properly.2. The needle thread tension is too tight.3. The needle is bent or blunt.4. The needle is incorrectly inserted.5. The needle thread and the bobbin thread are not set

properly under (drawn to the rear of) the presser footwhen sewing is starting.

6. The fabric is not drawn to the rear when sewing isfinished.

7. The thread is too heavy or too fine for the needle.

1. The bobbin thread is not threaded properly in thebobbin holder.

2. Lint has collected in the bobbin holder.3. The bobbin is damaged and doesnt turn smoothly.4. The thread is wound loosely on the bobbin.

1. Needle is incorrectly inserted.

2. The needle is bent or blunt.3. The needle clamp screw is too loose.4. A proper foot is not used.5. The fabric is not drawn to the rear when sewing is

finished.6. The needle is too fine for the fabric being sewn.

1. The needle is incorrectly inserted.2. The needle is bent or blunt.3. The needle and/or thread are not suitable for the

fabric being sewn.4. A blue needle is not being used for sewing stretch,very fine fabrics and synthetics.

5. The needle thread is not threaded properly.6. A poor quality needle is used.

1. The needle thread tension is too tight.2. The needle thread is not threaded properly.3. The needle is too heavy for the fabric being sewn.4. The stitch length is too long for the fabric.* Use a stabilizer for very fine fabrics.

1. The feed dog is packed with lint.

2. The stitches are too fine.3. The feed dog was not raised after being lowered.

Page 12Page 8Page 9Page 9

Page 14

Page 14Page 9

Page 11Page 37Replace the bobbinRe-wind the bobbin.

Page 9Page 9Page 9Use proper foot.

Page 14Page 9

Page 9Page 9

Page 9

Page 9Page 12Replace the needle

Page 8Page 12Page 9Make stitch shorter

Page 37

Make stitch longerPage 7

The buttonhole is notsewn well.

The machine does notwork.

Patterns are distorted.

1. The machine is not plugged in.2. Thread is caught in the hook race.3. The bobbin winder spindle is still in the winding position.

1. The stitch is not balanced.

1. The stitch density is not suitable for the fabric beingsewn.

2. Interfacing is not being used with stretch fabrics.

Page 4Page 37Page 10

Page 36

Page 24Page 21

Troubleshooting

The needle threadloops.

1. The needle thread tension is too loose.2. The needle size is not suitable for the thread.

Page 8Page 9

Noisy operation 1. The feed dog is packed with lint.

2. Lint has collected in the bobbin holder.

Page 37

Page 37

Due to heat from the internal electronic components, the indicator and function keys will be warm.However, it does not affect the machines normal operation.


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Documents

Sewing Machine Manual DC3050