Brother CV3440, CV3550 Operation Manual

Operation Manual

Cover stitch machine / Top cover stitch machine

Product Code: 884-B30 / B31

Manual de instrucciones

Máquina recubridora / Máquina recubridora superior

Product Code (Código de producto): 884-B30 / B31

EnglishEspañol

Be sure to read this document before using the machine. We recommend that you keep this document nearby for future reference.

Lea este documento antes de utilizar la máquina. Recomendamos que tenga este documento a mano por si necesita consultarlo más adelante.

IMPORTANT SAFETY INSTRUCTIONS

When using the sewing machine, basic safety precautions should always be followed, including the following. Read all instructions before using this machine.

19. Do not disassenble the machine. If the LED light unit (light-emitting diode) is damaged, it

DANGER

To reduce the risk of electric shock.

The sewing machine should never be left unattended when plugged in. Always unplug this sewing machine from the electrical outlet immediately after using and before cleaning.

WARNING

To 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 the sewing machine is used by or near children.

Use this se as described in this manual. Use only accessories recommended by the manufacturer as contained in this 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 the sewing machine to the nearest authorized dealer or service center for examination, repair, electrical or mechanical adjustment.

4. Never operate the sewing machine with any air openings blocked. Keep ventilation openings of the sewing machine and foot controller free from the accumulation of lint, dust, and loose cloth.

5. Never drop or insert any object into any openings.

6. Do not use outdoors.

Do not oper

7. used or where oxygen is being administered.

o disconnect, turn the main switch to the symbol “O”

position which represents off, 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 f

the needle causing it to break.

14.

Switch the se

when making any adjustments in the needle area, such as threading needle, changing needle, or changing presser foot, etc.

Alw

15. outlet when removing covers, lubricating, or when making any other user servicing adjustments mentioned in the instruction manual.

Electr

16.

- This machine should be connected to an AC power source within the range indicated on the rating label. Do not connect it to a DC power source or inverter. If you are not sure what kind of power source you have, contact a qualiﬁed electrician. This machine is appro

- purchase only.

This se

17. children or inﬁrm persons without supervision.

18. Young children should be supervised to ensure that they do not play with this sewing machine.

wing machine only for its intended use

ate where aerosol (spray) products are being

abric while stitching. It may deﬂect

wing machine to the symbol “O” position

ays unplug the sewing machine from the electrical

ical Hazards:

ved for use in the country of

wing machine is not intended for use by young

20. m

ust be replaced by authorized dealer.

CAUTION

To use the machine safely

1. (For U.S.A. only) This appliance has a polarized plug (one blade wider than the other) to reduce the risk of electric shock, this plug is intended to ﬁt in a polarized outlet only one way. If the plug does not ﬁt fully in the outlet, reverse the plug. If it still does not ﬁt, contact a qualiﬁed electrician to install the proper outlet. Do not modify the plug in any way.

2. Make sure you watch the needles carefully while you are sewing. Do not touch the handwheel, needles, knives, or other moving parts.

urn off the main power and unplug the cord in the

following circumstances:

- When you have stopped using the machine

- When you are replacing or removing the needle or any other part

- If there is a power failure while you are using the machine

- If you are checking or cleaning the machine

- Leaving the machine unattended

4. Do not store anything on the foot controller.

Fully plug the machine directly into the w

extension cords.

ater is dropped on the machine, unplug the machine

If w

immediately, and contact your local authorized dealer.

Do not put fur

8. Do not bend the cord, or pull on the cord to unplug.

Do not touch the cord with w

10. Place the machine near to the wall outlet.

11. Do not place the machine on an unstable surface.

12. Do not put on the soft cover.

13. If you notice any abnormal sound or condition, consult your local authorized dealer.

To give your machine a longer life

1. Do not store this machine in direct sunlight or in high humidity conditions. Do not use or store the machine near a heater, iron, halogen lamp or other hot object.

Use only mild soaps or detergents to clean the case

Benzene, thinner, and scouring powders can damage the case and machine, and should never be used.

3. Do not drop or hit the machine.

ays consult this manual before you replace or ﬁt the

Alw

presser foot, needle, or any other parts to make sure you ﬁt them correctly.

To repair or adjust the machine

If the machine breaks down or needs adjustment, ﬁrst follow the troubleshooting table to inspect and adjust the machine yourself. If the problem persists, consult your local authorized dealer.

niture on the cord.

et hands.

all. Do not use

SAVE THESE INSTRUCTIONS

This machine is intended for household use.

FOR USERS IN COUNTRIES EXCEPT CENELEC COUNTRIES

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.

FOR USERS IN CENELEC COUNTRIES

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.

CAUTION

When leaving this sewing machine unattended, the main power and light switch of the machine must be switched off or the plug must be removed from the socket-outlet.

English

When servicing the sewing machine, or when removing covers, the machine or the electrical set must be disconnected from the supply by removing the plug from the socket-outlet.

FOR USERS IN THE UK, EIRE,

MALTA AND CYPRUS ONLY

IMPORTANT

- In the event of replacing the plug fuse, use a fuse approved by ASTA to BS 1362, i.e. carrying the mark, rating as marked on plug.

- Always replace the fuse cover. Never use plugs with the fuse cover omitted.

- If the available electrical outlet is not suitable for the plug supplied with this equipment, you should contact your authorized dealer to obtain the correct lead.

CONGRATULATIONS ON CHOOSING THIS COMPACT

AVERTISSEMENT:

PARTIES EN MOUVEMENT. POUR ÉVITER TOUTE BLESSURE: FERMER LE CAPOT AVANT DE COUDRE. DÉBRANCHER AVANT ENTRETIEN.

OVERLOCK MACHINE

Your machine is a high quality, easy-to-use product. To fully enjoy all the features, we suggest that you study this booklet.

If you need more information regarding the use of your machine, your nearest authorized dealer is always happy to be of service.

Enjoy yourself!

CAUTION

When threading or replacing needle, the main power and light switch of the machine must be switched off or the plug must be removed from the socket-outlet.

When the machine is not in use, it is recommended that the electric supply plug is disconnected from the wall socket to avoid any possible hazards.

Notes on the motor

- The maximum operating speed of this sewing machine is 1,000 stitches per minute, which is quite fast compared to the normal operating speed of 300 to 800 stitches per minute for the ordinary sewing machine.

- The bearings in the motor are made of a special material (oil-impregnated alloy mounted in felt heat-treated with oil) that enables them to withstand long hours of continuous operation.

- Continuous operation of the sewing machine can cause heat to build in the motor area, but not enough to adversely affect its performance. It is important to keep fabric and paper away from the air openings on the back and sides of the machine so air can get to these openings.

- When the motor is running, sparks can be seen through the air openings in the motor bracket on the side opposite the handwheel. These sparks are produced by the carbon brushes and the commutator, and are part of the machines normal operation.

WARNING LABELS

The following warning labels are on the machine. Be sure to observe the precautions described in the labels.

Caution (U.S.A. and CANADA only)

Face plate sticker (U.S.A. and CANADA only)

(for complying with UL and CSA requirements)

Label locations

Contents

Chapter 1 : NAMES OF PARTS AND THEIR FUNCTIONS .................................................... 4

Machine (Cover stitch model) (Product code: 884-B30) .....................................................4

Accessories (Cover stitch model) .......................................................................................5

Machine (Top cover stitch model) (Product code: 884-B31) ...............................................6

Accessories (Top cover stitch model) .................................................................................7

Powering the machine.........................................................................................................8

Turning direction of handwheel ...........................................................................................8

Opening/Closing front cover ...............................................................................................8

Attaching/Removing a presser foot .....................................................................................8

Free-arm sewing (removing the bed extension) ..................................................................9

Looper thread tension adjustment lever ..............................................................................9

Stitch length ........................................................................................................................10

Differential feed ...................................................................................................................10

Adjusting the presser foot pressure ....................................................................................11

Adjusting the tension dials ..................................................................................................11

Needle ................................................................................................................................12

Removing/Installing the needle ...........................................................................................12

Chapter 2 : PREPARATION BEFORE THREADING .............................................................. 13

Thread tree .........................................................................................................................13

Using the thread spool cap .................................................................................................13

Spool mat ............................................................................................................................13

Using the spool mat ............................................................................................................13

Using the thread net ...........................................................................................................14

Before threading .................................................................................................................14

Chapter 3 : THREADING (Cover stitch model) ..................................................................... 15

Threading the looper ...........................................................................................................15

Threading the needles ........................................................................................................16

Chapter 4 : THREADING (Top cover stitch model) .............................................................. 17

Threading the looper ...........................................................................................................17

Threading the needles ........................................................................................................18

Attaching/Removing the top cover spreader and top cover thread guide ...........................19

Threading the top cover spreader .......................................................................................20

Chapter 5 : TYPE OF STITCHES COMPARISON CHART ..................................................... 21

Chapter 6 : SEWING ............................................................................................................... 24

Sewing ﬂ at fabric (for example, trial sewing) .......................................................................24

Removing the fabric from the machine (Cover stitch model) ..............................................24

Removing the fabric from the machine (Top cover stitch model) ........................................25

Sewing a cover stitch ..........................................................................................................27

Sewing tubular garments (for example, cuffs) .....................................................................27

Stabilizing the beginning and end of stitching .....................................................................28

Chapter 7 : TROUBLESHOOTING .......................................................................................... 29

Chapter 8 : MAINTENANCE ................................................................................................... 30

Cleaning ..............................................................................................................................30

SPECIFICATIONS .................................................................................................................... 31

English

CHAPTER 1 NAMES OF PARTS AND THEIR FUNCTIONS

Machine (Cover stitch model) (Product code: 884-B30)

Inside of the front cover

<C>

Thread tree

Presser foot pressure adjustment screw

Thread take-up cover

Thread cutter

Material plate cover

Needles

Bed extension

Presser foot

Left needle thread tension dial

Center needle thread tension dial

Right needle thread tension dial

Looper thread tension dial

Presser foot lever

Front cover

Thread guide

Spool pin

Spool cushion

<A>

Spool support

Stitch length adjustment dial

Differential feed ratio adjustment dial

Handwheel

Main power and light switch

Foot controller socket

Handle

Air openings

Inside of the front cover

Looper thread tension adjustment lever

Looper thread take-up

Looper

Looper release lever

Front cover compartment

You can store the included accessories in this front cover compartment. <A>: Needle set, : Tweezers, <C>: Hexagonal driver

Included accessory

Accessories (Cover stitch model)

No. Part Name Part Code

Soft cover XB3264001

Accessory box XB3291001

Tweezers XB1618001

Thread net (4) X75904000

Thread spool cap (4) X77260000

Cleaning brush X75906001

Hexagonal driver XB0393001 Needle set (130/705H)

#90: 3 pcs.

Clear foot XB3361001

Attachment screw (2) XB3292001

Spool mat (4) XB1218001

Foot controller

Instruction DVD

Operation Manual -

XB1216001

XC7359021 (120V Area) XB3112001 (230V Area) XB3134001 (U.K.) XB3200001 (Argentina) XB3156001 (Korea) XB3255001 (China) XB3190001 (Australia, New Zealand) XF2826001 (Brazil 127V) XB3178001 (Brazil 220V)

XB3301001 (NTSC) XB3305001 (PAL)

English

Optional accessory

When using the following accessories, use the presser foot included in the accessories.

No. Product Name

Hemming set SA221CV

Bias tape folder SA222CV

Belt loop guide SA223CV

Bias tape binding set SA230CV

Dual function fold binder SA231CV

Americas Europe Others

Part Code

SA221CV/ XB2970-101

SA222CV/ XB2971-101

SA223CV/ XB2972-101

SA230CV/ XB3387-001

SA231CV/ XB3388-001

SA221CV

SA222CV

SA223CV

SA230CVAP

SA231CVAP

Machine (Top cover stitch model) (Product code: 884-B31)

Inside of the front cover

<C>

Thread tree

Presser foot pressure adjustment screw

Thread take-up cover

Thread cutter

Material plate cover

Needles

Bed extension

Presser foot

Top cover spreader

Top cover thread guide

Left needle thread tension dial

Center needle thread tension dial

Right needle thread tension dial

Top cover thread tension dial

Looper thread tension dial

Presser foot lever

Front cover

Thread guide

Spool pin

<A>

Spool cushion

Spool support

Stitch length adjustment dial

Differential feed ratio adjustment dial

Handwheel

Main power and light switch

Foot controller socket

Handle

Air openings

Inside of the front cover

Looper thread tension adjustment lever

Looper thread take-up

Looper

Looper release lever

Front cover compartment

You can store the included accessories in this front cover compartment. <A>: Needle set, : Tweezers, <C>: Hexagonal driver

Accessories (Top cover stitch model)

Included accessory

No. Part Name Part Code

Soft cover XB3264001

Accessory box XB3291001

Tweezers XB1618001

Thread net (5) X75904000

Thread spool cap (5) X77260000

Cleaning brush X75906001

Hexagonal driver XB0393001 Needle set (130/705H)

#90: 3 pcs.

Clear foot XB3361001

Top cover spreader XB3090001

Top cover thread guide XB3105001

Attachment screw (2) XB3292001

Spool mat (5) XB1218001

Foot controller

Instruction DVD

Operation Manual -

XB1216001

XB3301001 (NTSC) XB3305001 (PAL)

English

Optional accessory

When using the following accessories, use the presser foot included in the accessories.

No. Product Name

Hemming set * SA221CV

Bias tape folder SA222CV

Belt loop guide SA223CV

Bias tape binding set SA230CV

Dual function fold binder SA231CV

Americas Europe Others

* Can be used only with a cover stitch; cannot be used with a top cover stitch.

Part Code

SA221CV/ XB2970-101

SA222CV/ XB2971-101

SA223CV/ XB2972-101

SA230CV/ XB3387-001

SA231CV/ XB3388-001

SA221CV

SA222CV

SA223CV

SA230CVAP

SA231CVAP

Powering the machine

Turning on the machine

1. Insert the three-pin plug into the socket on the

lower-right side of the machine. Insert the power supply plug into a power outlet.

2. Turn the main power and light switch <A> to “I”

mark (to “O” mark to turn off).

<A>

Opening/Closing front cover

It is necessary to open the front cover when threading this machine. Slide it to the right 1, and then open it 2. After closing it, slide it to the left.

CAUTION

For your safety, make sure that the front cover is closed when operating the machine.

Always turn off the machine before opening the front cover.

Operation

When the foot controller is pressed lightly, the machine runs at a low speed. As the foot controller is pressed further, the machine will increase speed. When the foot controller is released, the machine stops.

NOTE (For U.S.A. only): Foot controller: Model KD-1902 This foot controller can be used on the machine with product code 884-B30 and 884-B31. * The product code is shown on the machine rating

plate.

Turning direction of

handwheel

The handwheel <A> turns in a counterclockwise direction (direction of arrow). This is the same direction as an ordinary home sewing machine. Move the needles to their highest positions by turning the handwheel so that the mark on the handwheel is aligned with the line on the machine.

Attaching/Removing a

presser foot

1. Turn off the main power and light switch or disconnect the power supply plug.

2. Raise the presser foot lever 1.

3. Turn the handwheel 2 so that the line on the handwheel is aligned with the line on the machine. (See “Turning direction of handwheel” in CHAPTER 1.)

Push the button on the presser foot holder 3 to release the standard presser foot.

5. Raise the presser foot farther by pushing the presser foot lever upward. Then, remove the presser foot and store it in a safe location.

6. Again, raise the presser foot farther by pushing the presser foot lever upward. Place the presser foot just under the presser foot holder <A> so that the groove in the bottom of the presser foot holder is aligned with the bar on the top of the foot <C>, and then lower the presser foot lever to attach the foot 4.

<A>

<C>

Free-arm sewing

(removing the bed extension)

Free-arm sewing enables tubular pieces to be sewn more easily.

1. Remove the bed extension.

Bed extension

NOTE: Be careful not to lose the removed bed extension.

2. Position the fabric, and then start sewing. (See CHAPTER 5.)

Looper thread tension

adjustment lever

With the looper thread tension adjustment lever, ﬁ ne adjustments can be made to the looper thread tension. When sewing stretch fabric or with a small stitch length, raise the lever to increase the tension of the looper thread. When sewing non-stretch fabric or with a large stitch length, lower the lever to reduce the tension of the looper thread.

Raise the lever to increase the tension of the looper thread.

Lower the lever to reduce the tension of the looper thread.

<A> Looper thread tension adjustment lever

Non-stretch fabric such as serge

Reduce the tension of the looper thread.

<A>

English

Lever position: Center Lever position: Down

Stretch fabric such as smooth knit

Increase the tension of the looper thread.

Lever position: Center Lever position: Up

Stitch length

The normal stitch length setting is 3 mm. To change the stitch length, turn the stitch length adjustment dial on the right side of the machine.

<A>

Shorten the stitch length to a minimum of 2 mm (5/64 inch).

Lengthen the stitch to a maximum of 4 mm (5/32 inch).

<A> Selection mark

The normal setting is 1.0 on the differential feed adjustment dial.

To adjust the differential feed, turn the dial on the lower-right side of the machine.

<A>

Less than 1.0

Greater than 1.0

<A> Selection mark

Differential feed

There are two sets of feed dogs under the presser foot to move the fabric through the machine. The differential feed controls the movement of both the front and the rear feed dogs. When set at 1, the feed dogs are moving at the same speed (ratio of 1). When the differential feed ratio is set at less than 1, the front feed dogs move less than the rear feed dogs, stretching the fabric as it is sewn. This is effective on lightweight fabric that may pucker. When the differential feed ratio is set at greater than 1, the front feed dogs move more than the rear feed dogs, gathering the fabric as it is sewn. This function assists in removing rippling when sewing stretch fabrics.

Differential feed adjustment

Feed ratio Main feed

(rear)

Less than

1.0

Greater than 1.0

Differential feed (front)

Effect Application

Material is pulled tight.

Without differential feed.

Material is gathered or pushed together.

Prevents thin materials from puckering

Normal sewing

Prevents stretch materials from stretching or puckering

An example

When stretch material is sewn without using the differential feed, the fabric will be wavy.

To get a smooth ﬁ nish, adjust the feed ratio from 1.0 toward 2.0. (The feed ratio required depends on the elasticity of the material.)

The more elastic the material, the further toward

2.0 the differential feed ratio should be set. Test sew with a scrap of the fabric to ﬁ nd the correct adjustment.

CAUTION

When sewing thick non-stretchable material such as denim, do not use the differential feed as it may damage the fabric.

Adjusting the presser

foot pressure

Turn the pressure adjustment screw on the left of the top of the machine. Refer to the value on the screw to make the adjustment.

The normal setting is “2”.

<A>

Less pressure

More pressure

<A> Selection mark

Adjusting the tension dials

There is a thread tension dial for each needle thread, the looper thread and the top cover thread. The correct thread tension may vary according to the type and thickness of the fabric and the type of thread used. Thread tension adjustments may be necessary for any change in sewing materials.

Cover stitch model

 Tension control

Sewing is possible at position “4” for most circumstances. (Standard: SPAN #60)

If the stitch quality is insufﬁ cient, select a different tension setting.

<A>

For heavy tension: 4 to 6

For light tension: 4 to 2

For medium tension: 5 to 3

<A> Tension selection mark

CAUTION

Make sure that the thread is properly seated in the tension discs.

English

123



The tension dial marked in yellow is for the left needle thread.

The tension dial marked in green is for the center needle

thread.

The tension dial marked in pink is for the right needle thread.

The tension dial marked in blue is for the looper thread.





4444

Top cover stitch model

1234



The tension dial marked in yellow is for the left needle thread.

The tension dial marked in green is for the center needle

thread.

The tension dial marked in pink is for the right needle thread.

The tension dial marked in purple is for the top cover thread.

The tension dial marked in blue is for the looper thread.







4444

Needle

This machine uses a standard home sewing machine needle. The recommended needle is 130/705H (#90).

Needle description

Back (ﬂ at side)

Front

Groove

How to check the needle

Flat surface

Place the needle on its ﬂ at side and check to see if the space

is even.

NOTE: Fabric damage can be reduced by using 130/705H SUK (#90) BALL POINT.

To remove:

1. Turn off the main power and light switch.

2. Turn the handwheel so that the line on the handwheel is aligned with the line on the machine. (See “Turning direction of handwheel” in CHAPTER 1.)

3. Loosen the corresponding needle set screw by turning it with the included hexagonal driver toward 2 in the illustration, and then remove the needle.

To install:

1. Turn off the main power and light switch.

2. Turn the handwheel so that the line on the handwheel is aligned with the line on the machine.

3. Hold the needle with its ﬂ at side away from you and insert it up as far as it will go.

4. Tighten the needle set screw securely by turning it with turning the included hexagonal driver toward 1 in the illustration.

NOTE: Be sure to insert the needles all the way.

Removing/Installing

the needle

<A> Removing/installing the left needle Removing/installing the center needle <C> Removing/installing the right needle

<A>

Tighten

Loosen

<C>

CAUTION

Always be sure to turn off the power before removing/inserting the needle.

Do not drop the needle and needle set screw in the machine, otherwise it may be damaged.

CHAPTER 2 PREPARATION BEFORE THREADING

Thread tree

Raise the telescoping thread tree to its highest position. Make sure that the thread holders are in alignment above the spool pins as illustrated below.

Cover stitch model

Top cover stitch model

Thread holder on thread tree

Spool pin

Correct position

CAUTION

Before using a thread spool, be sure to remove the spool cushion.

English

Before using loosely spun nylon thread, be sure to install the spool cushion.

If the thread spool cap is not fully pushed down, the thread may become entangled on the spool pin or the needle may bend or break.

Spool mat

When using thread spools or loosely spun thread that easily slips off the spool, place this mat under the spool.

This prevents the thread from becoming entangled on the spool pin.

Using the thread

spool cap

When using sewing thread spools, the thread spool cap should be used as illustrated below. Make sure that the spool notch is on the bottom.

Thread spool cap

Using the spool mat

1. Remove the spool cushion, and then place the spool mat on the spool pin.

2. Place the thread spool (with the spool notch at the bottom) on the spool pin, and then place the thread spool cap on top and fully push it down.

Spool cushion

Thread spool cap

Spool support

Spool mat

CAUTION

If the thread spool cap is not fully pushed down against the thread spool, the thread may become entangled on the spool pin or the needle may bend or break.

Using the thread net

If you are sewing with loosely spun nylon thread, we recommend that you cover the spool with the included net in order to prevent the thread from slipping off the spool. Adapt the net to the shape of the spool.

Before threading

1. Turn off the main power and light switch for safety.

2. Raise the presser foot using the presser foot lever.

3. Turn the handwheel so that the line on the handwheel <A> is aligned with the line on the machine. (See “Turning direction of handwheel” in CHAPTER 1.)

<A>

CHAPTER 3 THREADING (Cover stitch model)

1. Open the front cover by sliding it to the right and

CAUTION

Before threading, turn off the machine for safety.

Threading the looper

Run the thread in the sequence illustrated, following the blue line and the numbers next to each threading point.

guiding the top toward you.

2. Pull the thread off the spool and directly up through thread holder 1 and thread holder 2 on the thread tree, from back to front.

3. Pass the looper thread 3 as shown in the illustration.

4. Pass the thread through the tension disc 4 in the channel next to the tension dial marked with a blue c.

5. Guide the thread down the channel and through threading points 5-9, following the numerical order in the illustration.

6. After running the thread to 9, push the looper release lever 0 to move the looper to the right A, and then run the thread through B-C.

7. Pull about 10 cm (4 inch) of thread through the eye of the looper.

8. While pushing the looper D, return the looper to its original position.

9. Close the front cover.

NOTE: When using thick thread, such as decorative thread, as the looper thread, run the thread as shown in the illustration.

English

Do not run the thread through A.

Threading the needles

Needle threads used by the various

stitches

The triple cover stitch (three-needle, four-thread cover stitch) uses the left needle thread, center needle thread and right needle thread.

The two-needle, three-thread cover stitch (Wide) (6 mm (15/64 inch)) uses the left needle thread and right needle thread.

The two-needle, three-thread cover stitch (Narrow) (3 mm (1/8 inch)) uses the center needle thread and right needle thread.

The chain stitch uses the center needle thread and looper thread.

212

444

333

Threading the left needle

Run the thread in the sequence illustrated, following the yellow numbers and ¡ marks next to the threading points. (1-9)

Threading the center needle

Run the thread in the sequence illustrated, following the green numbers and z marks next to the threading points. (1-9)

Threading the right needle

Run the thread in the sequence illustrated, following the pink numbers and  marks next to the threading points. (1-9)

CAUTION

When threading the needles, always thread in the following order: left needle, center needle and right needle.

1. Pull the thread off the spool and directly up through thread holder

on the thread tree, from back to front.

222

2. Pass each thread through illustration.

3. Pass the thread through the tension disc in the channel next to the tension dial.

4. Guide the thread down the channel and across through threading points the color marks, following the numerical order in the illustration.

5. Pass the thread through the eye of the needle, front to back.

and thread holder

111

333

555-888

, shown in the

444

next to

666

To left needle

To center needle

To right needle

Branching plate

Pull about 6 cm (about 2-1/2 inches) of thread through the

eye of the needle.

999

Front to back

CHAPTER 4 THREADING (Top cover stitch model)

1. Open the front cover by sliding it to the right and

CAUTION

Before threading, turn off the machine for safety.

Threading the looper

Run the thread in the sequence illustrated, following the blue line and the numbers next to each threading point.

guiding the top toward you.

2. Pull the thread off the spool and directly up through thread holder 1 and thread holder 2 on the thread tree, from back to front.

3. Pass the looper thread 3 as shown in the illustration.

4. Pass the thread through the tension disc 4 in the channel next to the tension dial marked with a blue c.

5. Guide the thread down the channel and through threading points 5-9, following the numerical order in the illustration.

6. After running the thread to 9, push the looper release lever 0 to move the looper to the right A, and then run the thread through B-C.

7. Pull about 10 cm (4 inch) of thread through the eye of the looper.

8. While pushing the looper D, return the looper to its original position.

9. Close the front cover.

NOTE: When using thick thread, such as decorative thread, as the looper thread, run the thread as shown in the illustration.

English

Do not run the thread through A.

Threading the needles

Needle threads used by the various

stitches

The triple cover stitch (three-needle, four-thread cover stitch) uses the left needle thread, center needle thread and right needle thread.

The two-needle, three-thread cover stitch (Wide) (6 mm (15/64 inch)) uses the left needle thread and right needle thread.

The two-needle, three-thread cover stitch (Narrow) (3 mm (1/8 inch)) uses the center needle thread and right needle thread.

The chain stitch uses the center needle thread and looper thread.

212

444

333

Threading the left needle

Run the thread in the sequence illustrated, following the yellow numbers and ¡ marks next to the threading points. (1-9)

Threading the center needle

Run the thread in the sequence illustrated, following the green numbers and z marks next to the threading points. (1-9)

Threading the right needle

Run the thread in the sequence illustrated, following the pink numbers and  marks next to the threading points. (1-9)

CAUTION

When threading the needles, always thread in the following order: left needle, center needle and right needle.

1. Pull the thread off the spool and directly up through thread holder

on the thread tree, from back to front.

222

2. Pass each thread through illustration.

3. Pass the thread through the tension disc in the channel next to the tension dial.

4. Guide the thread down the channel and across through threading points the color marks, following the numerical order in the illustration.

5. Pass the thread through the eye of the needle, front to back.

and thread holder

111

333

555-888

, shown in the

444

next to

666

To left needle

To center needle

To right needle

Branching plate

Pull about 6 cm (about 2-1/2 inches) of thread through the

eye of the needle.

999

Front to back

Attaching/Removing

the top cover spreader and

top cover thread guide

 Attaching the top cover spreader and

top cover thread guide

1. Turn the handwheel so that the line on the handwheel <A> is aligned with the line on the machine.

<A>

2. Squeeze the grip of the top cover spreader to spread the tips, and then, from the right side, clamp the mount of the top cover spreader onto the top cover drive shaft.

 Removing the top cover spreader and

top cover thread guide

1. Turn the handwheel so that the line on the handwheel is aligned with the line on the machine.

<A>

2. Press the lever on the top cover thread guide mount, and then remove the top cover thread guide.

English

Grip of top cover spreader

Mount of top cover spreader

Top cover drive shaft

3. Insert the top cover thread guide into the slot in the top cover thread guide mount.

Top cover thread guide

Slot

Lever

Top cover thread guide

3. Squeeze the grip of the top cover spreader to spread the tips, and then remove the mount of the top cover spreader from the top cover drive shaft.

Grip of top cover spreader

Mount of top cover spreader

Top cover drive shaft

+ 47 hidden pages

Brother CV3440, CV3550 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual