Juki Ml-111 User manual

NOTE : Read safety instructions carefully and understand them before using.

Retain this Instruction Manual for future reference.

INSTRUCTION MANUAL

ML-111

No.02

40095701

Please do not hesitate to contact our distributors or agents in your area for further information when necessary.

＊The description covered in this instruction manual is subject to change for improvement of the

commodity without notice.

13 · 09 Printed in Japan

SEWING MACHINERY BUSINESS UNIT

2-11-1, TSURUMAKI, TAMA-SHI,

TOKYO, 206-8551, JAPAN

PHONE : (81)42-357-2371

FAX : (81)42-357-2380

http://www.juki.com

For the sewing machine, automatic machine and ancillary devices (hereinafter collectively referred to as

"machine"), it is inevitable to conduct sewing work near moving parts of the machine. This means that there

is always a possibility of unintentionally coming in contact with the moving parts. Operators who actually

operate the machine and maintenance personnel who are involved in maintenance and repair of the machine

are strongly recommended to carefully read to fully understand the following SAFETY PRECAUTIONS

before using/maintaining the machine. The content of the SAFETY PRECAUTIONS includes items which

are not contained in the speci¿cations of your product.

The risk indications are classi¿ed into the following three different categories to help understand the meaning

of the labels. Be sure to fully understand the following description and strictly observe the instructions.

Warning label

❶

❷

❸

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TRSerIRrPVeZing ZRrNZiWK VaIeW\ FRYer

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❸

❷

❶

EleFWriFalVKRFN

Ganger label

DANGER :

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WARNING :

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CAUTION :

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PiFWRrial Zarning

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CRnneFWiRn RI a earWK Fable iV

inGiFaWeG

TO ENSURE SAFE USE OF YOUR SEWING MACHINE

I E[SlanaWiRn RI riVN leYelV

(II)

E[SlanaWiRn RI SiFWRrial Zarning inGiFaWiRnVanGZarning labelV

– 10 –

14. HEIGHT OF THE PRESSER BAR

After replacing a presser foot or when the presser bar height is

changed, adjust the presser bar position as follows;

1. Loosen the clamp screw 1of the presser bar guide bracket by in-

serting a screw driver through the adjusting hole on the face plate,

2. Retighten the screw 1securely after positioning the presser bar.

15. LENGTH OF THE THREAD TAKEN UP BY THE THREAD TAKE-UP LEVER

In order to always produce perfect stitches, it is advisable to adjust the

length of the thread taken up by the thread take-up lever according to

each sewing condition like the type of material and the stitch length.

1. When sewing a heavy weight material slide the thread guide up-

ward to shorten the thread.

2. When sewing a light weight material, slide the thread guide down-

ward to lengthen the thread. This adjustment is also effective to

prevent stitch-skipping.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

1) Use the 3-phase 200W AC clutch motor.

2) Use an M type V belt.

3) The following table shows the relationship among the motor pulley and the sewing speed.

Model Sewing speed Effective diameter of

handwheel

Number

of poles Frequency Rotational speed

of motor

Effective diameter

of motor pulley

ML-111

1,700 sti/min

φ67.4 4

50 Hz 1,430 rpm φ80

60 Hz 1,715 rpm φ65

1,800 sti/min 50 Hz 1,430 rpm φ85

60 Hz 1,715 rpm φ70

(Caution) The effective diameter of the motor pulley is obtained by subtracting 5 mm from the outside diameter.

16. MOTOR PULLEY AND SEWING SPEED

– 9 –

13. RELATION BETWEEN THE NEEDLE AND THE LOOPER

2mm

0.05mm

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

Standard position of the looper:

When the needle 1goes up 2 mm from its lowest position,

1) The looper point 3must align with the needle 1center and

2) The looper point 3must be 2 mm away from the top end of the

needle eye.

8. Align the looper point 3with the needle 1center in this position.

9. Leave a clearance of 0.05 mm or less between the looper point 3

and the needle 1.

10. Securely tighten the looper holder screws 9.

Adjustment of the looper position:

1. Turn the handwheel until the needle bar 4reaches its lowest posi-

tion.

2. Loosen the needle bar connection screw 5.

(Determine the needle bar height)

3. Align the upper mark line 6of the needle bar 4with the bottom

end of the needle bar lower bushing 7.

4. Tighten the needle bar connection screw 5.

(Determine the looper position)

5. Loosen 2 setscrews of the looper holder (see above ﬁgure of last

page) so that the looper2can be rotated by hand.

6. By holding the looper 2with your ﬁngers in the thread hooking

position.

7. Turn the handwheel until the lower mark line 8of the needle bar

4aligns with the bottom end of the needle bar lower bushing 7.

Determinetheneedlebarheight

Determinethelooperposition

(Alignthelooperpointwiththeneedlecenterinthisposition.)

SAFETY PRECAUTIONS

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DANGER

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iii

PRECAUTIONS TO %E TA.EN IN 9ARIOUS OPERATION STAGES

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– 8 –

12. HOW TO REMOVE THE LOOPER

11. STITCH LENGTH

The stitch length is adjustable with the stitch dial which is calibrated in

mm.

1. Rotate stitch dial 1in either direction and

2. Set a desired length to the feed regulator stop pin on the machine

arm.

* The maximum stitch length is 10 mm.

* The stopper

2at the standard height blocks the reverse feed con-

trol lever 3when the stitch length is set to "0".

Raise stopper

2by loosening its knurled head nut to block the feed

control lever at a higher position, and a ﬁner stitch will be produced

in the normal feed.

When the looper got entangled in the thread during operation or is to

be replaced remove it in the following way;

1. Manually rotate the handwheel until it is positioned as illustrated.

2. Loosen looper setscrew 1.

3. Rotate the handwheel until it is positioned as illustrated.

4. Pull out the looper towards left (arrow direction).

* Reverse the above procedure for attaching the looper.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

– 7 –

10. PRESSER FOOT AND FEED DOG

Pressure of the presser foot:

Adjust the presser spring regulator 1for a proper pressure:

1. Turn in the clockwise direction for increasing the pressure.

2. Turn in the counterclockwise direction for reducing the pressure.

It is advisable to set it to about 39.2 N for general cloths.

Presser lifter

1. Turn the hand lifter 2behind the face plate to either left or right,

and the presser foot will be lifted up.

2. The presser foot is held 5.5 mm above the throat plate.

3. Depress the knee lifter once, and the presser foot will be lowered to

its working position.

4. When using the knee lifter, the presser foot will go up 12 mm

above the throat plate.

Height of the feed dog

The feed dog 3has been adjusted before shipment to raise 0.9 to 1.0

mm above the top level of the throat plate 4.

For adjusting the height of the feed dog 3;

1. Loosen the screw 6of the feed driving shaft crank 5.

2. Adjust the feed bar for a proper height by moving it up and down.

3. Securely tighten the screw 6.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

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Precautions to be taken so as to use the ML-111 more safely

1. Keep your hands away from needle when you turn ON the power switch or while the

machine is in operation.

2. Do not put your ﬁngers into the thread take-up cover while the machine is operat-

ing.

3. Turn OFF the power switch when tilting the machine head, or removing the belt

cover or the V belts.

4. During operation, be careful not to allow your or any other person’s head, hands or

clothes to come close to the handwheel and thread take-up lever. Also, do not place

anything close to them.

5. Do not operate your machine with the belt cover and ﬁnger guard removed.

6. When tilting the machine head, be sure to conﬁrm that the head support bar is

properly attached to your machine head, and be careful not to allow your ﬁngers or

the like to be pinched in the machine head.

1. To ensure safety, never operate the machine with the ground wire for the power

supply removed.

2. When inserting/removing the power plug, the power switch has to be turned OFF in

advance.

3. In time of thunder and lightening, stop your work and disconnect the power plug

from the receptacle so as to ensure safety.

4. If the machine is suddenly moved from a cold place to a warm place, dew conden-

sation may be observed. In this case, turn ON the power to the machine after you

have conﬁrmed that there is no danger of water drops in the machine.

5. To prevent ﬁres, periodically draw out the power plug from the plug socket and

clean the root of the pins and the space between pins.

6. The loopers oscillate at a high speed during operation.

Be sure to keep your hands away from the vicinity of the loopers to protect hands

from possible injury during operation. Turn the power OFF before threading the

machine head.

7. To avoid possible accidents due to abrupt start of the machine, be sure to turn OFF

the power to the machine.

8. Be careful of handling this product so as not to pour water or oil, shock by drop-

ping, and the like since this product is a precision instrument.

9. When tilting or returning the sewing machine to the home position, hold the upper

side of the machine head with both hands and perform the work quietly so that ﬁn-

gers or the like are not caught in the machine.

– 6 –

9. THREAD TENSION

Thread tension is adjusted by the tension nut.

1. Turn the tension nut clockwise for increasing the tension.

2. Turn the tension nut counterclockwise for reducing the tension.

* Reduce the tension of the tension spring No. 1 to the lowest to the

extent that it allows the thread to stably run. (0.01 to 0.02 N)

The tension spring No. 2 mainly controls the tension of the stitch for-

mation.

The tension spring No. 3 prevents stitches from forming irregular seam

on the bottom face of fabrics. If any irregular stitches are formed on

the bottom face of fabric, increase its tension to the extent not to from

puckering stitches instead.

– 5 –

7. ATTACHING THE NEEDLE

Use a TV x 7 needle with the most suitable size according to the thread

No. and kind of material.

1. Manually rotate the handwheel until the needle bar reaches its high-

est position.

2. Loosen the needle clamp screw 1.

3. Hold a needle 2by facing its groove 3to the right.

4. Insert the needle 2into the needle hole as far as it can go.

5. Securely tighten the needle clamp screw 1.

8. THREADING THE MACHINE

Manually rotate the handwheel until the thread take-up level reaches the highest position.

1. Thread the machine in the order shown below.

2. Thread the needle from left to right.

3. Leave about 10 cm of thread from the needle eye with which to begin sewing.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

BEFORE OPERATION

CAUTION :

Check the following so as to prevent maloperation of and damage to the machine.

• Before you put the machine into operation for the ﬁrst time after the set-up, clean it thoroughly.

Remove all dust gathering during transportation and oil it well.

• Conﬁrm that voltage has been correctly set.

Conﬁrm that the power plug has been properly connected to the power supply.

•

Never use the machine in the state where the voltage type is different from the designated one.

• The direction of normal rotation of the machine is counterclockwise as observed from the pul-

ley side.

Take care not to allow the machine to rotate in the reverse direction.

• Never operate the machine unless the sewing machine have been ﬁlled with oil.

• For a test run, remove the bobbin and the needle thread.

• For the ﬁrst month, decrease the sewing speed and run the sewing machine at a speed of 1,500

sti/min or less.

• Operate the handwheel after the machine has totally stopped.

In addition, be aware that the safety devices such as the "eye protection cover" and "ﬁnger

guard" are sometimes omitted in the sketches, illustrations and ﬁgures included in the Instruction

Manual for the explanation's sake. In the practical use, never remove those safety devices.

CAUTION

– 4 –

6. LUBRICATION

Lubricate the arrow points shown in Fig. 1 and 4. They must be lubricated at least twice a

day when the machine is continuously operated. Use JUKI New Defrix Oil No. 1.

(Caution) Before starting the ﬁrst operation of your newly installed machine,

lubricate the following parts without fail.

1. Needle bar crank (See Fig. 2 a~d Fig. 5)

Pour oil into the oil hole 1on the front of the machine arm, and the oil will ﬂow

through main shaft front bushing 2, oil felt 3and the oil wick and will reach oil pipe

4to lubricate needle bar crank rod 5.

On the other hand, another oil wick allows the oil to lubricate the needle bar through

needle bar upper bushing 6.

Thus, the needle bar crank mechanism is completely lubricated. After lubrication, the

used oil gathering in the front part 7of the machine arm is collected by the drip pan

on the bottom of the machine through oil return felt 8.

2. Feed mechanism (Fig. 3)

The lubricating oil poured into the oil reservoir 9ﬂows to lubricate feed regulator

connecting link !3,pit-man !4 and feed driving shaft connecting rod !5 through the oil

wicks !0, !1 and !2 respectively.

3. Feed driving and feed bar (Fig. 4)

Lubricate all the arrow points as illustrated from the bottom of the machine bed.

The center of feed rock shaft !7 and feed bar shaft !8 are lubricated through oil wick

!6.

4. Filling the gear case with grease. (Fig. 6 and Fig. 7)

Regularly ﬁll the gear case by removing plug screws !9 and @00.

As soon as the oil seals which prevent grease from leaking are found damaged or worn

after long period of use, replace them immediately.

Fig.1

Fig.2

Fig.3 Fig.4

Fig.5 Fig.6 Fig.7

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

134

9!1

vii

DECLARATION OF INCORPORATION OF PARTLY COMPLETED MACHINERY

We hereby declare that the sewing machine (sewing head) described below ;

1. Must not be put into service until the machinery to which it is incorporated has been declared in

conformity with the provisions of the Directive 2006/42/EC, and

2. Conforms to the essential requirements of the Directive 2006/42/EC, described in the technical

documentation, and

3. To be prepared with the above technical documentation compiled in accordance with part B of

Annex VII, and

4. Also to conform to the RoHS Directive 2011/65/EU

5. Relevant information on which should be transmitted in response to a reasoned request by the

national authorities, by the electronic method or other according to the request.

Applied harmonized standards, in particular :

EN ISO12100, EN ISO10821, EN 50581

Manufacturer :

JUKI CORPORATION

2-11-1, Tsurumaki, Tama-shi, Tokyo, Japan

Model

Description Industrial Sewing Machine

Function make stitches and sew

ML-111

– 3 –

4. INSTALLING THE BELT COVER

5. ADJUSTING THE BELT TENSION

The standard installing position of the belt cover and bobbin winder

is as shown in the ﬁgure below. Install them according to the steps of

procedure as described below.

1.Screw belt cover strut 1into the tapped hole located under the

handwheel of the machine arm.

2.Tighten two washers 3and two screws 4in the belt cover mount-

ing screw holes near the side plate to secure belt cover body (A) 2.

3.Install belt support 6on belt cover body (B) 5using washer 7

and screw 8.

4.Put belt cover body (B) 5inside belt cover body (A) 2.

5.Install belt cover lid 9on belt cover body (A) 2using screws !0

and !1.

6.Make sure that belt cover body (B) 5does not come in contact

with belt cover body (A) 2. Then, secure the belt cover (B) 5on

the table using washers !2 and screws !3.

7.Install belt cover (D) !4 on belt cover body (B) 5using screw !5.

Adjust the belt tension with the height of the motor so that the belt sags

15 mm when the center of V belt is applied with a 9.8 N load.

15mm

9.8N

Handwheel

Motorpulley

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

WARNING :

To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the

motor has totally stopped rotating in prior.

Beltholeoftable

Bedholeoftable

viii

CONTENTS

SPECIFICATIONS ...........................................................................................................................1

1. INSTALLING THE MACHINE ....................................................................................................1

2. INSTALLING THE KNEE LIFTER COMPONENTS......................................................................2

3. INSTALLING THE THREAD STAND..........................................................................................2

4. INSTALLING THE BELT COVER ................................................................................................3

5. ADJUSTING THE BELT TENSION.............................................................................................3

6. LUBRICATION..........................................................................................................................4

7. ATTACHING THE NEEDLE........................................................................................................5

8. THREADING THE MACHINE....................................................................................................5

9. THREAD TENSION...................................................................................................................6

10. PRESSER FOOT AND FEED DOG.............................................................................................7

11. STITCH LENGTH ......................................................................................................................8

12. HOW TO REMOVE THE LOOPER .............................................................................................8

13. RELATION BETWEEN THE NEEDLE AND THE LOOPER ..........................................................9

14. HEIGHT OF THE PRESSER BAR .............................................................................................10

15. LENGTH OF THE THREAD TAKEN UP BY THE THREAD TAKE-UP LEVER.............................10

16. MOTOR PULLEY AND SEWING SPEED .................................................................................10

– 1 –

1. INSTALLING THE MACHINE

SPECIFICATIONS

1. Carry the sewing machine with two persons.

(Caution) Do not hold the handwheel.

Do not put protruding articles such as the screwdriver and the like at

the location where the sewing machine is placed.

3. Attaching the hinge rubber and the head support rubber, etc.

Fix the hinge rubber 1, the head cushion washer 2, the head sup-

port rubber washer 3and the head support rubber 4supplied with

the machine on the table using the nails 5.

Attach the head cushion 6to the head support rubber 4.

Stitch type 1-needle, single-thread, chainstitch Needle TV×7 #11 to #14 (standard: #14)

Applications Basting the suits pieces of light and medium-

heavy weight fabrics

Thread take-up Needle bar thread take-up

Sewing speed Max. 1,800 sti/min Looper Single thread looper, looper shaft dia. Ø4.05

Stitch length 2 to 10 mm

(Adjustment is possible to 1 to 10 mm. )

Stitch length adjustment Dial regulator

Lift of presser foot Hand lifter 5.5 mm, Knee lifter 12 mm Lubricating oil JUKI New defrix oil No.1

Noise - Equivalent continuous emission sound pressure level (LpA) at the workstation:

A-weighted value of 68.5 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 -ISO 11204 GR2 at 1,800 sti/min.

5. Fit hinge

9into the opening in the machine bed, and ﬁt the ma-

chine head to table rubber hinge before placing the machine head

on rubber seats on the four corners.

6. Securely attach head support rod !0 to the table until it goes no

further.

23mm

1.5mm

4. Put the drip pan 7into the machine table 8from above. Place it

so that its right end has a gap of 1.5 mm from the end of the table

8and its top end is 23 mm above the table 8surface.

* Make sure that the recessed part of the knee lifter rotation arm is

located just under the installation hole for the knee press lifter rod

and ﬁx the drip pan 7in the above-mentioned position by using 6

wood screws.

– 2 –

3. INSTALLING THE THREAD STAND

2. INSTALLING THE KNEE LIFTER COMPONENTS

Attach the knee lifter components using the screws supplied with the machine to the position of the above ﬁgure.

Assemble the thread stand unit, and insert it in the hole in the machine

table. Tighten locknut 1to ﬁx the thread stand.

– 1 –

1. INSTALLING THE MACHINE

SPECIFICATIONS

1. Carry the sewing machine with two persons.

(Caution) Do not hold the handwheel.

Do not put protruding articles such as the screwdriver and the like at

the location where the sewing machine is placed.

3. Attaching the hinge rubber and the head support rubber, etc.

Fix the hinge rubber 1, the head cushion washer 2, the head sup-

port rubber washer 3and the head support rubber 4supplied with

the machine on the table using the nails 5.

Attach the head cushion 6to the head support rubber 4.

Stitch type 1-needle, single-thread, chainstitch Needle TV×7 #11 to #14 (standard: #14)

Applications Basting the suits pieces of light and medium-

heavy weight fabrics

Thread take-up Needle bar thread take-up

Sewing speed Max. 1,800 sti/min Looper Single thread looper, looper shaft dia. Ø4.05

Stitch length 2 to 10 mm

(Adjustment is possible to 1 to 10 mm. )

Stitch length adjustment Dial regulator

Lift of presser foot Hand lifter 5.5 mm, Knee lifter 12 mm Lubricating oil JUKI New defrix oil No.1

Noise - Equivalent continuous emission sound pressure level (LpA) at the workstation:

A-weighted value of 68.5 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 -ISO 11204 GR2 at 1,800 sti/min.

5. Fit hinge

9into the opening in the machine bed, and ﬁt the ma-

chine head to table rubber hinge before placing the machine head

on rubber seats on the four corners.

6. Securely attach head support rod !0 to the table until it goes no

further.

23mm

1.5mm

4. Put the drip pan 7into the machine table 8from above. Place it

so that its right end has a gap of 1.5 mm from the end of the table

8and its top end is 23 mm above the table 8surface.

* Make sure that the recessed part of the knee lifter rotation arm is

located just under the installation hole for the knee press lifter rod

and ﬁx the drip pan 7in the above-mentioned position by using 6

wood screws.

– 2 –

3. INSTALLING THE THREAD STAND

2. INSTALLING THE KNEE LIFTER COMPONENTS

Attach the knee lifter components using the screws supplied with the machine to the position of the above ﬁgure.

Assemble the thread stand unit, and insert it in the hole in the machine

table. Tighten locknut 1to ﬁx the thread stand.