Merrylock MK1100 User Manual

Instruction Book

Instruction Book

Instruction Book

1-Needle 3-Thread

Overlock Sewing Machine

“IMPORTANT SAFETY INSTRUCTIONS“

When using an electrical appliance, basic safety precautions should always be followed, including the following:
Read the instruction carefully before you use the machine.

“DANGER“___

1. The appliance should never be left unattended when plugged in.

2. Always unplug this appliance from the electric outlet immediately after using and before cleaning.

3. Always unplug before re-lamping. Change the light bulb only with the same of bulb and type rated max. 220~

240V/15W or 115V/15W.

To reduce the risk of electric shock:
Pour reduire le risque de décharges électriques :

“WARNING“ “ATTENTION“___

To reduce the risk of burns, fire, electric shock, or injury to persons:
Pour réduire le risque de brûlures, de feu, de décharges électriques ou de blessures Aux personnes :

* Do not allow this appliance to be used as a toy. Close attention is necessary when this appliance is used by

near children and infirm persons.

* Use this appliance only for its intended use as described in this manual. Use only attachments recommended

by the manufacturer as contained in this manual.

* Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it has been

or damaged, or dropped into water. Return the appliance to the nearest authorized dealer or service center for
examination, repair, electrical or mechanical adjustment.

* Never operate the appliance with any air openings blocked. Keep ventilation openings of the sewing machine

and foot control free from the accumulation of lint, dust, and loose cloth.

* Keep fingers away from all moving parts. Special care is required around the sewing machine needle and

cutter.
* Always use the proper stitch plate. The wrong plate can cause the needle to break.
* Do not use bent needles.
* Do not pull or push fabric while stitching. It may deflect the needle causing it to break.
* Switch the sewing machine off “ O “ when marking any adjustments in the needle area, such as threading

needle area, such as threading needle, changing needle, threading looper, or changing presser foot and the

like.
* Always unplug the machine from the electrical outlet when removing covers, when covers are opened to raise

the upper cutter or thread the loopers, when lubricating or when making any other user servicing

mentioned in the instruction manual.
* Never drop or insert any abject into any opening.
* Do not use outdoors.
* Do not operate where aerosol (spray) products are being used or where oxygen is being administered.
* To disconnect, turn all controls to the off “ O “ position, then remove plug from outlet.
* Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
* Basically, the machine should be disconnected from the electricity supply when not in use.
* If the power cord of this appliance is damaged, it must be replaced with a special cord by your nearest

authorized dealer or service center.
* This appliance is provided with double insulation. (except USA/ CAN) Use only identical replacement parts. See

instructions for servicing double insulated appliances.
* If oil gets in eyes, immediately, rinse the oil out with water. If you swallow oil by mistake, immediately consult a

medical doctor.
* Close cover before operating machine.

adjustments

or

dropped

TABLE OF CONTENTS

TABLE OF CONTENTS

Parts Name............................................................................................................................................................

Standard Accessories..........................................................................................................................................

Specifications........................................................................................................................................................

Opening and Closing the Looper Cover.............................................................................................................

Opening and Closing the Sewing Table..............................................................................................................

Opening and Closing the Accessory Box...........................................................................................................

Connecting the Machine to the Power Supply...................................................................................................

How to Use Foot Controller and Control the Sewing Speed.............................................................................

How to Turn the Balance Wheel...........................................................................................................................

How to Attach the Chip Box.................................................................................................................................

Stretch Up the Thread Guide Bar.........................................................................................................................

Attaching the Thread Stripping Disc and net......................................................................................................

Raising or Lowering the Presser Foot.................................................................................................................

How to Change (Remove) the Presser Foot........................................................................................................

How to Thread the Machine............................................................................................................................

-Threading the upper looper.................................................................................................................................

-Threading the lower looper..................................................................................................................................

-Threading the needle.........................................................................................................................................

Securing Ends......................................................................................................................................................

Adjustment of Differential Feed (DF type only)................................................................................................

Thread tension adjusment..................................................................................................................................

Adjustment of Stitch length................................................................................................................................

Adjustment of Cutting Width..............................................................................................................................

Replacing the Light Bulb....................................................................................................................................

Changing the Needle...........................................................................................................................................

Changing the Upper Knife...................................................................................................................................

Using the Needle Plate........................................................................................................................................

Rolled Hemming, Picot Edging and Narrow Hemming....................................................................................

Cleaning and Oiling.............................................................................................................................................

Trouble Shooting.................................................................................................................................................

Optional Feet.......................................................................................................................................................

8-10

2
3

3
4
4
4
5
5
5
5
6
6
7
7

8
9

10

11
12
13
14
14
14
15
15
16
17
18
19
20

1

Parts Name

Needle thread tension dial

Foot pressure cover

Pre-tension thread guide

Thread guide bar

Thread guide

Thread take-up lever cover
Needle thread guide
Needle thread guide

Sewing table

Looper cover
Base plate

Upper looper thread tension dial
Lower looper thread tension dial

Lamp cover

Motor cover

Spool pin

Spool holder

Spool stand
Stitch length dial

Side Cover

Balance wheel

Power socket

Light and Power switch

Needle clamp

Presser foot lifter

Extension table

Differential feed dial

Accessory box

Presser foot

Sewing table

Feet holder

2

Standard Accessories

Screw driver Set of Needles Tweezers Nets

Lint brush Oil Upper knife Thread stripping discs

Hexagon wrench Chip box

Specifications

Max. speed

Stitch length

Stitch width

Presser foot height

Differential feed (DF type only)

Needle

Dimentions

Net weight

Up to 1300 r.p.m.

1-4mm

3-5mm

Max. 6mm

0.8-2.0

ELx705 # 12 or # 14

292Wx295Dx290H mm

7.4 KGS

3

Looper cover

Hollow

Opening and Closing the Looper Cover

To open:
Hold the hollow to the right as far as it will go, then pull
looper cover toward you.

To close:
Lift looper cover and push against the machine. The
looper cover snaps into the position automatically.

Opening and Closing the Sewing Table

To open:
Lift the metal lever, then hold the sewing table going
down.

To close:
Lift sewing table and push it back to the position.

Metal lever

Accessory box

Opening and Closing the Accessory Box

To open:
Draw out the box, it can store all standard accessories.

To close:
Push it back to the position.

*For optional accessories, it can only be stored in the

attached accessories bag.

4

Connecting the Machine to the Power Supply

Electrical outlet

ON

OFF

O

Light and Power
switch

1. Turn off the light and power switch.

2. Connect two plugs to power socket and electrical outlet.

3. Turn on the light and power switch.

-Caution­Always disconnect the plug from electrical outlet:

- when machine is not in use.

- when attaching or removing parts.

- when threading or cleaning the machine.

Power socket

Foot controller

How to Use the Foot Controller and
Control the Sewing Speed

1. Tread your foot on the controller.

2. Press and release the controller to practice the
sewing speed.

3. The harder you press on the controller,the faster
the machine runs.

Foot controller

How to Turn the Balance Wheel

Always turn the balance wheel toward you.

I

Light and power switch

How to Attach the Chip Box

Insert the projection under the base plate.

Balance wheel

Base plate

Chip box

5

Stretch up the Thread Guide Bar

1. Pull the thread guide bar up to the top.

2. Turn the thread guide bar to make it comes right above
the spool pins and locked into the stopper.

Attaching the Thread Stripping Disc and Net

Spool holder

12

1. When you use a small thread spool, pull out the spool holder from the spool pin. Then place the spool
with its slit side up, and put the thread stripping disc on top.

2. If the thread would slip down from the spool during threading and/or sewing, put a net on the spool as
illustrated for preventing jamming. The nets are supplied with the machine.

Thread stripping disc

Spool pin

6

Presser
foot lifter

Presser foot

Needle

Raising or Lowering the Presser Foot

1. Apply the presser foot lifter to raise or lower the
presser foot.

2. Always keep the presser foot down when sewing.

How to Change (Remove) the Presser
Foot

1. Raise the presser foot lifter.

2. Turn the balance wheel to raise the needle.

Lever

Lever

Foot holder

Groove

Pin

3. Press the lever to drop off the presser foot.

4. Raise the Presser foot lifter again to remove the
presser foot.

5. Raise the presser foot lifter, and apply the desired
presser foot under the foot holder and make the pin
on the foot lies under the groove of the foot holder.

6. Lower the foot holder and push the lever to lock the
foot in place.

7. Raise the presser foot lifter and see the presser foot
is in place.

7

1

3

2

3

4

2

2

2

3

3

4

4

Threading the upper looper (green)

How to Thread the Machine

-NOTED-

1. Always thread the upper looper first, then lower
looper, needle on the right and needle on the left.
A threading chart is placed on the machine body
inside the looper cover.

2. Incorrect threading will cause of skipped stitch,
broken thread or uneven thread tension. Before
to sew, make sure that your machine is threaded
properly.

1

2

2

2

3

4

3

3

4

4

(a) (b) ( )

()5

- Open the looper cover.

- Place the spool on the spool holder second from the right.

- Draw the thread through the pre-tension thread guide (1)

from right to left.

- Thread from left to right around the Thread guide (2)

- Thread guides (3, 4, 5)

- Turn the balance wheel toward you until the upper looper

comes outside of the needle plate, and apply the tweezers

to pass thread through looper eye (6)

(1)

()2

c

2

3

4

(6)

Upper looper

(3)

()4

8

2

Threading the lower looper (red)

- Open the looper cover and sewing table.

- Place the spool on right spool holder.

- Draw the thread through the pre-tension thread guide (1)
from right to left.

- Thread from left to right around the thread guide (2)

- Thread guides (3, 4, 5, 6)

- Turn the balance wheel toward you until the lower looper
extending out 5-10mm from the needle plate edge.

- Pull the thread with tweezers to pass through the lower
looper hole.

- Draw the thread with your left hand tightly.

- Use your finger to push the automatic threader up to
the topmost, and then thread goes throught the lower
looper automatically.

(a)

(b)

()

c

(d)

(1)

(6)

(5)

(3)

(4)

(e)

(2)

Lower looper
hole

Thread guide (6)

Automatic threader

Lower looper

(f)

2

3

4

9

3

2

2

3

4

2

3

3

4

4

Threading the needle (orange)

- Place the spool on left spool holder.

- Draw the thread through the pre-tension thread guide (1)
from left to right.

- Thread from left to right around the thread guide (2).

- Thread guide (3)

- Thread behind of the thread take-up lever cover.

- Thread guide (4)

- Turn the balance wheel toward you to bring needle bar at
its highest position, then pass the thread through needle bar
thread guide from left to right.

- Pass the thread through the needle eye.

(a)

(b)

(b)

()

c

(1)

(d)

2

3

4

(3)

(e)

(2)

(f)

2

3

4

()4

(g)

Needle bar

10

Securing Ends

To avoid unravelling, it is necessary to leave a thread chain about 5 cm (2") long at the beginning and
end of seam. To secure the beginning and end of a seam choose one of the following methods.

At the beginning

a

b

c

Separate the end of threads and knot.

a

Thread the chain through a large eyed needle, and weave that chain through the overlock stitches

b

on the fabric.

c

Backstitching

1

Before putting your fabric in the machines, sew a thread chain about 5 cm (2") long behind the
needle.

2

Put your fabric in the machine. Then serge a few stitches and stop.
Raise the presser foot and bring the thread chain to the left around and under the presser foot.

3

Place the thread chain between the presser foot and upper knife, holding it in position as you

4

lower the presser foot to sew.

5

After sewing about 2.5 cm (1"), move the chain to the right and under the upper knife, cutting the
chain as you sew.

Serge one stitch off the end

a

of seam.

a

Raise the needle and presser

b

foot, and gently pull the
threads off the prong.

c

Turn the fabric over so the
under side is up.

c

b

Serge about 2.5 cm (1") over

d

stitching and angle off the
fabric.

d

11

Adjustment of Differential Feed (DF type only)

5

6

4

7

8

3

2

1

N

1

2

3

4

5

Stretched

Gathered

How to adjust

If the sewn fabric is stretched, turn the dial between the " " section.

If the sewn fabric is gathered, turn the dial between the " " section.

* When sewing without differential feed, the adjustment dial should be set on the "N" position.

* To gather into ruffles: Set your machine up for a balanced 3 thread overlock stitch with your length on 3.

set your differential feed dial to 8 to gather.

* To make lettuce edge: Set your machine for a rolled hemming and the differential feed set on 5 to stretch.

12

Thread Tension Adjustment

Thread Tension Dial

2

3

4

Needle thread is loose. Lower looper thread is tight and /

Correct Tension

2

2

3

3

4

4

Wrong side
of fabric

Upper
looper

Needle thread

thread

Tighten

2

Lower looper
thread

3

4

Right side
of fabric

Loosen

Upper looper thread is tight and /

or upper looper thread is loose.

or lower looper thread is loose.

Wrong side

Needle thread

Right side

Wrong side Wrong side

Lower

Upper
looper

looper
thread

thread

Lower
looper
thread

Right side

Needle thread

Upper
looper
thread

Right side

Upper looper
thread

Lower
looper
thread

Needle thread

2

3

4

2

2

3

3

4

4

2

3

4

2

2

3

3

4

4

2

3

4

2

2

3

3

4

4

13

Clockwise

Adjustment of Stitch Length

1. Larger the number, longer the stitch. Smaller the
number, shorter the stitch.

2. The stitch length can be adjusted from 1 to 4mm
(approx. 0.04" to 0.15")

3. The position "N" is for normal over lock sewing.

Adjustment of Cutting Width

Counter­clockwise

The proper cutting width differs with the type of fabric.
Check the seam each time, and adjust the cutting
width as follows:

1. Open the sewing table.

2. Turn the cutting width dial

- counter-clockwise to get the larger cutting width.

(for lighter fabrics).

- clockwise to get the smaller cutting width.

(for heavier fabrics).

Light bulb

To attach

Lamp cover

Set screw

To remove

Replacing the Light Bulb

1. Disconnect the machine from the power supply.
Remove the lamp cover set screw, and remove the
lamp cover.

2. To Remove:
Turn to the left
To Attach
Turn to the right

3. Attach the lamp cover, and tighten the lamp cover
set screw.

For your safety:
The machine is designed to use a 15 WATT MAXIMUM
LIGHT BULB.

14

Change the Needle

Needle clamp
screw

Flat side

Hexagon
wrench

Presser foot

Needle
clamp

a

1. Disconnect the machine from the power supply.

2. Turn the balance wheel to raise the needle above the presser foot.
Then apply the hexagon wrench ( in the accessory box) to loose the needle clamp screw for
the needle you are going to remove. (Figure a )

3. Insert new needle into the needle clamp with its flat side to the back until the top of needle touches
the stopper pin, then tighten the needle clamp screw. (Figure b )

4. When the needles are set correctly, the left needle is higher than the right needle. (Figure b ).
Noted: Never use the needle which is bent or blunt.

Change the Upper Knife

b

Upper
knife

0.5~1.0mm

Set screw

1. Disconnect the machine from power supply.

2. Open the sewing table and looper cover first.

3. Remove the presser foot.

4. Turn balance wheel toward you until the upper knife at its highest position.

5. Loosen the upper knife set screw and take off the upper knife. (Figure a )

6. Replace the new upper knife and tighten the set screw.

7. Turn the balance wheel toward you to set the cutting edge of the upper knife to its lowest position with
the lower knife to overlap between 0.5-1.0mm, and tighten the upper knife set screw securely (Figure b )

8. Re-set the presser foot, and close the sewing table and looper cover.

* Raising the upper knife (Figure c )

Push the upper knife holder to the right. Turn the knob clockwise until the knife engages.

* The lower knife is made of special hard material and should not require replacement under normal use.

If it is chipped, call your dealer for replacement.

Upper knife

Lower

a

knife

Push

b

15

c

Using the Needle Plate

Switch the lever to select the regular or rolled hem and narrow hem sewing.

“R” For rolled and narrow hem sewing “N” For regular sewing

Lever

Lever

Fabric, needle and threads

Fabric

Needle

Needle thread

Upper and lower
looper threads

Lightweight fabric such as organdy,
crepe de chine, lawn and georgette

ELx705 # 12

Long fiber polyester thread No. 80-100

Rolled Hemming Picot Edging Narrow Hemming

Woolly nylon,
Wooly polyester

16

Synthetic: 60-100
Silk: 50-100

Wolly nylon,
woolly polyester

Rolled Hemming, Narrow Hemming and Picot Edging

Rolled Hemming

2

1

Stitch length: 1.5 - 2

Narrow Hemming

2

1

Stitch length: 1.5 - 2

3

355

Wrong side

5

2

3

4

7

2

2

3

3

4

4

of fabric

Lower
looper
thread

Right side
of fabric

Needle
thread

3

5

352

Wrong side

4

of fabric

Lower

Upper
looper
thread

looper

2

3

4

2

2

3

3

4

4

thread

Right side
of fabric

Needle
thread

Upper
looper
thread

Picot Edging

4

3

Stitch length:3-4

2

243

Wrong side

4

2

3

4

5

2

2

3

3

4

4

of fabric

Lower
looper
thread

Right side
of fabric

Upper
looper

Needle

thread

thread

17

Cleaning and oiling

Feed dog

Upper knife

Lower knife

Lint brush

-Cleaning the feed dog-

1. Open the sewing table and looper cover.

2. Turn the balance wheel toward you until the needle
goes up to the highest position.

3. Remove the needle plate and presser foot.

4. Using a lint brush (in the accessory box) to brush
around the feed dog.

5. Re-set needle plate and presser foot.

-Cleaning upper knife area-

1. Open the looper cover.

2. Using a lint brush (in the accessory box) to
brush the upper knife and lower knife area.

* Disconnect the machine from the power supply

before cleaning.

2-3 Drops

-Oiling-

1. Open the looper cover.

2. Apply 2-3 drops of fine quality sewing machine oil
to the parts as indicated.

3. It is recommended to apply oil once a week in
normal use, once in ten hours in continuous use.

18

Trouble shooting

Before calling for service, check the information below.

Problem Cause Correction

Thread Breaks

Needles Breaks

Machines Skips Stitches

Fabric Puckers

1. Needle inserted incorrectly

2. Used wrong needle

3. Needle is bent or blunt

4. Thread tensions are too tight

5. Worng threading

1. Pulling fabric while sewing

2. Needle inserted incorrectly

1. Needle inserted incorrectly

2. Needle is bent or blunt

3. Used wrong needle

4. Wrong threading

1. Stitch length not suitable
for fabric

2. Thread tensions are too tight

3. Seam width not suitable
for fabric

- Reset needle

- Use correct needle

- Insert new needle

- Loosen thread tensions

- Rethread

- Do not pull fabric

- Reset needle

- Reset needle

- Insert new

- Use correct needle

- Rethread

- Readjust stitch length

- Loosen thread tensions

- Readjust seam width

needle

Reference
Page

15
15
15
13

8~10

15

15
15
15

8~10

14

13
14

Machine Runs Heavily

Machine will Not Sew

Loose Stitches or
Loops Formed

1. Dirt or lint in stitching mechanism

1. Cord not plugged into electrical
outlet

2. Light and power switch not on

1. Tensions not adjusted properly

19

- Clean the maching

- Check plug

- Turn on the switch

- Check thread tensions

18

5

5

13

Optional feet

ELASTIC FOOT:

This special sewing foot is for sewing on elastic tape.
In the same operation, the fabric is trimmed, serged
and gathered by the constriction of the elastic tape.

BLIND HEM/LACE FOOT:

One foot for both blind hem and lace sewing.
BLIND HEM: The hem is trimmed, serged and sewn

in one operation.

For sewing lace or borders together

LACE:

or onto a workpiece.

SHIRRING FOOT:

This special sewing foot is used for joining two pieces
of fabric and shirring the bottom layer in one operation.

BEAD/SEQUIN FOOT:

This special sewing foot is for sewing on beads,
sequins, pearls, strass bands, strings and ordinary
cords.

CORDING FOOT:

This special sewing foot is used for sewing a cording
tape between two layers of fabric in one operation.

TAPING FOOT:

This special sewing foot is for sewing on tapes.
On stretch materials (knitwear) the seams are
prevented from stretching when a tape is sewn on.

Optional feet are available from your dealer.

20

RECYCLING

Do not dispose of electrical appliances as unsorted municipal waste. Use separate collection
facilities.

Contact your local government for information regarding the collection systems available.

If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak
into the groundwater and get into the food chain, damaging your health and well-being.

When replacing old appliances with new one, the retailer is legally obligated to take back
your old appliance for disposal at least for free of charge.

F1P05-01