Duerkopp Adler 755 S User manual

755 S

Service Instructions

Property of Dürkopp Adler AG and protected by copyright. Any reuse of these contents,

including extracts, is prohibited without the prior written approval of Dürkopp Adler AG.

IMPORTANT

READ CAREFULLY BEFORE USE

KEEP FOR FUTURE REFERENCE

Table of Contents

Service Instructions 755 S - 02.0 - 03/2019 1

1 About these instructions ........................................................... 5

1.1 For whom are these instructions intended?.................................. 5

1.2 Representation conventions – symbols and characters ............... 5

1.3 Other documents .......................................................................... 7

1.4 Liability.......................................................................................... 7

2 Safety........................................................................................... 9

2.1 Basic safety instructions ............................................................... 9

2.2 Signal words and symbols used in warnings.............................. 10

3 Working basis ........................................................................... 13

3.1 Gages ......................................................................................... 13

3.2 Locking the machine in place ..................................................... 13

3.3 Swiveling up the machine head.................................................. 14

3.4 Swiveling down the machine head ............................................. 16

3.5 Setting the handwheel scale....................................................... 17

4 Aligning the machine head...................................................... 19

5 Disassembling and assembling the machine head............... 23

5.1 Disassembling the machine head............................................... 23

5.2 Assembling machine head ......................................................... 24

6 Needle bar ................................................................................. 26

6.1 Aligning the needle bar with the throat plate .............................. 26

6.2 Setting the needle bar height...................................................... 29

6.3 Changing the needle holder ....................................................... 31

6.4 Disassembling the needle bar linkage........................................ 32

6.4.1 Assembling the needle bar linkage............................................. 34

7 Hook........................................................................................... 37

7.1 Changing the hook ..................................................................... 37

7.2 Setting the loop stroke................................................................ 38

7.3 Setting the distance between hook tips and needles ................. 40

7.4 Setting the needle guard ............................................................ 42

7.5 Setting the bobbin case lifter ...................................................... 44

7.5.1 Setting the timing for opening..................................................... 45

7.5.2 Setting the lifting gap .................................................................. 47

8 Setting the overload coupling ................................................. 48

8.1 Latching the overload coupling................................................... 48

8.2 Setting the torque ....................................................................... 49

9 Setting the remaining thread monitor..................................... 50

10 Middle knife............................................................................... 51

10.1 Changing the drive motor ........................................................... 51

10.1.1 Disassembling the drive motor ................................................... 51

10.1.2 Assembling the drive motor ........................................................ 53

10.2 Setting the middle knife .............................................................. 54

11 Setting the thread tension spring ........................................... 57

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2 Service Instructions 755 S - 02.0 - 03/2019

12 Setting the trimming and clamping device for the needle

threads....................................................................................... 58

12.1 Testing the function of the trimming and clamping device for

the needle threads...................................................................... 59

12.2 Replacing knives and thread-pulling knife .................................. 60

12.3 Setting the thread-pulling knife to a different needle distance.... 63

12.4 Converting the trimming and clamping device............................ 64

13 Setting the trimming and clamping device for the hook

threads....................................................................................... 65

13.1 Changing the knives ................................................................... 66

13.2 Setting the hook thread trimmer ................................................. 67

13.3 Testing the hook thread trimmer................................................. 68

14 Needle thread advancing device............................................. 69

14.1 Setting the needle thread quantity.............................................. 69

14.2 Setting the movement of the needle thread advancing device... 70

15 Changing the sewing motor .................................................... 71

16 Setting the folding station plate.............................................. 75

17 Folder......................................................................................... 77

17.1 Assembling the folder ................................................................. 77

17.2 Aligning the folder with the needles............................................ 78

17.3 Aligning the folder with the middle of the pocket opening .......... 79

17.4 Setting the guide plates at the folder .......................................... 81

17.5 Setting the stroke movement for the folder................................. 83

17.6 Setting the folder detection......................................................... 87

18 Transport carriage.................................................................... 89

18.1 Setting the reference position of the transport carriage.............. 89

18.2 Setting the front end position of the transport carriage............... 90

18.3 Changing the toothed belt .......................................................... 92

18.4 Setting the toothed belt tension .................................................. 94

19 Transport clamps ..................................................................... 97

19.1 Aligning the transport clamps with the sliding plate edge........... 98

19.2 Setting the height of the transport clamps .................................. 99

19.3 Aligning the folder sole with the transport clamps .................... 100

19.4 Setting the blowing of the piping strips ..................................... 103

19.5 Setting the transport clamp pressure........................................ 105

20 Manual corner knife station (straight pocket)...................... 107

20.1 Adjusting the corner knives mechanically................................. 107

20.1.1 Setting the initial position of the corner knives ......................... 107

20.1.2 Testing the initial position of the corner knives manually.......... 108

20.2 Adjusting the corner knives electrically..................................... 111

20.3 Aligning the corner knife station with the seams....................... 115

20.4 Setting the angle of the corner knife incisions .......................... 116

20.5 Replacing corner knives ........................................................... 117

21 Setting the marking lamps..................................................... 119

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Service Instructions 755 S - 02.0 - 03/2019 3

22 Light barriers .......................................................................... 121

22.1 Setting the light barrier holder .................................................. 121

22.2 Aligning the light barriers .......................................................... 123

22.3 Setting the correction values for the flap .................................. 128

22.4 Aligning the air nozzles for cleaning the reflecting foils ............ 128

23 Assembling the vacuum unit (optional) ............................... 131

24 Additional equipment............................................................. 133

24.1 Setting the downholder............................................................. 133

24.2 Assembling the pocket bag clamp............................................ 136

24.3 Setting the outfeed roller .......................................................... 137

25 Stacker..................................................................................... 139

25.1 Pincer stacker........................................................................... 139

25.1.1 Assembling the pincer stacker.................................................. 139

25.1.2 Setting the pincer stacker ......................................................... 142

25.1.3 Activating the pincer stacker..................................................... 143

25.2 Throw-over stacker................................................................... 144

25.2.1 Assembling the throw-over stacker........................................... 144

25.2.2 Aligning the throw-over stacker ................................................ 148

25.2.3 Activating the throw-over stacker ............................................. 150

25.2.4 Setting the stacking speed ....................................................... 150

25.2.5 Setting the stack removal ......................................................... 151

25.2.6 Setting the sewing material surface.......................................... 152

25.2.7 Setting the position of the stops ............................................... 153

25.3 Setting the stacker brackets ..................................................... 154

25.3.1 Replacing pneumatic cylinders, pneumatic valve and coupling

rods........................................................................................... 157

25.3.2 Setting the pneumatic switch.................................................... 163

26 Programming .......................................................................... 165

27 Maintenance............................................................................ 299

27.1 Cleaning ................................................................................... 300

27.2 Lubricating ................................................................................ 302

27.2.1 Lubricating the machine head .................................................. 303

27.2.2 Lubricating the hook ................................................................. 303

27.3 Servicing the pneumatic system............................................... 304

27.3.1 Setting the operating pressure ................................................. 304

27.3.2 Draining the water condensation .............................................. 305

27.3.3 Cleaning the filter element........................................................ 306

27.4 Parts list.................................................................................... 307

28 Decommissioning................................................................... 309

29 Disposal................................................................................... 311

30 Troubleshooting ..................................................................... 313

30.1 Customer Service ..................................................................... 313

30.2 Messages of the software......................................................... 313

31 Technical data......................................................................... 331

32 Appendix ................................................................................. 333

Table of Contents

4 Service Instructions 755 S - 02.0 - 03/2019

About these instructions

Service Instructions 755 S - 02.0 - 03/2019 5

1 About these instructions

These instructions have been prepared with utmost care. They contain

information and notes intended to ensure long-term and reliable operation.

Should you notice any discrepancies or if you have improvement requests,

then we would be glad to receive your feedback through Customer

Service ( p. 313).

Consider the instructions part of the product and store them in a place

where they are readily available.

1.1 For whom are these instructions intended?

These instructions are intended for:

• Specialists:

This group has the appropriate technical training for performing

maintenance or repairing malfunctions.

With regard to minimum qualification and other requirements to be met by

personnel, please also follow the chapter Safety ( p. 9).

1.2 Representation conventions – symbols and characters

Various information in these instructions is represented or highlighted

by the following characters in order to facilitate easy and quick

understanding:

Proper setting

Specifies proper setting.

Disturbances

Specifies the disturbances that can occur from an incorrect setting.

Cover

Specifies which covers must be disassembled in order to access the com-

ponents to be set.

About these instructions

6 Service Instructions 755 S - 02.0 - 03/2019

Steps to be performed when operating the machine (sewing and

equipping)

Steps to be performed for service, maintenance, and installation

Steps to be performed via the software control panel

The individual steps are numbered:

First step

Second step

The steps must always be followed in the specified order.

Lists are marked by bullet points.

Result of performing an operation

Change to the machine or on the display/control panel.

Important

Special attention must be paid to this point when performing a step.

Information

Additional information, e.g. on alternative operating options.

Order

Specifies the work to be performed before or after a setting.

References

 Reference to another section in these instructions.

Safety Important warnings for the user of the machine are specifically marked.

Since safety is of particular importance, hazard symbols, levels of

danger and their signal words are described separately in the chapter

Safety ( p. 9).

Location

information

If no other clear location information is used in a figure, indications of right

or left are always from the user's point of view.

1.

2.

…

•



About these instructions

Service Instructions 755 S - 02.0 - 03/2019 7

1.3 Other documents

The machine includes components from other manufacturers. Each man-

ufacturer has performed a hazard assessment for these purchased parts

and confirmed their design compliance with applicable European and na-

tional regulations. The proper use of the built-in components is described

in the corresponding manufacturer's instructions.

1.4 Liability

All information and notes in these instructions have been compiled in

accordance with the latest technology and the applicable standards and

regulations.

Dürkopp Adler cannot be held liable for any damage resulting from:

• Breakage and damage during transport

• Failure to observe these instructions

• Improper use

• Unauthorized modifications to the machine

• Use of untrained personnel

• Use of unapproved parts

Transport

Dürkopp Adler cannot be held liable for breakage and transport damages.

Inspect the delivery immediately upon receiving it. Report any damage

to the last transport manager. This also applies if the packaging is not

damaged.

Leave machines, equipment and packaging material in the condition in

which they were found when the damage was discovered. This will ensure

any claims against the transport company.

Report all other complaints to Dürkopp Adler immediately after receiving

the product.

About these instructions

8 Service Instructions 755 S - 02.0 - 03/2019

Safety

Service Instructions 755 S - 02.0 - 03/2019 9

2 Safety

This chapter contains basic information for your safety. Read the instruc-

tions carefully before setting up or operating the machine. Make sure to

follow the information included in the safety instructions. Failure to do so

can result in serious injury and property damage.

2.1 Basic safety instructions

The machine may only be used as described in these instructions.

These instructions must be available at the machine's location at all times.

Work on live components and equipment is prohibited. Exceptions are

defined in the DIN VDE 0105.

For the following work, switch off the machine at the main switch or

disconnect the power plug:

• Replacing the needle or other sewing tools

• Leaving the workstation

• Performing maintenance work and repairs

• Threading

Missing or faulty parts could impair safety and damage the machine.

Only use original parts from the manufacturer.

Transport Use a lifting carriage or forklift to transport the machine. Raise the machine

max. 20 mm and secure it to prevent it from slipping off.

Setup The connection cable must have a power plug approved in the relevant

country. The power plug may only be assembled to the connection cable

by qualified specialists.

Obligations

of the operator

Follow the country-specific safety and accident prevention regulations and

the legal regulations concerning industrial safety and the protection of the

environment.

All the warnings and safety signs on the machine must always be in legible

condition. Do not remove!

Missing or damaged warnings and safety signs must be replaced

immediately.

Requirements

to be met by

the personnel

Only qualified specialists may:

• Setting up the machine

• Perform maintenance work and repairs

• Perform work on electrical equipment

Only authorized persons may work on the machine and must first have

understood these instructions.

Safety

10 Service Instructions 755 S - 02.0 - 03/2019

Operation Check the machine during operating for any externally visible damage.

Stop working if you notice any changes to the machine. Report any chang-

es to your supervisor. Do not use a damaged machine any further.

Safety

equipment

Safety equipment should not be removed or deactivated. If it is essential

to remove or deactivate safety equipment for a repair operation, it must be

assembled and put back into operation immediately afterward.

2.2 Signal words and symbols used in warnings

Warnings in the text are distinguished by color bars. The color scheme is

based on the severity of the danger. Signal words indicate the severity of

the danger.

Signal words Signal words and the hazard they describe:

Symbols The following symbols indicate the type of danger to personnel:

Signal word Meaning

DANGER (with hazard symbol)

If ignored, fatal or serious injury will result

WARNING (with hazard symbol)

If ignored, fatal or serious injury can result

CAUTION (with hazard symbol)

If ignored, moderate or minor injury can result

CAUTION (with hazard symbol)

If ignored, environmental damage can result

NOTICE (without hazard symbol)

If ignored, property damage can result

Symbol Type of danger

General

Electric shock

Safety

Service Instructions 755 S - 02.0 - 03/2019 11

Examples Examples of the layout of warnings in the text:

 This is what a warning looks like for a hazard that will result in serious

injury or even death if ignored.

 This is what a warning looks like for a hazard that could result in

serious or even fatal injury if ignored.

 This is what a warning looks like for a hazard that could result in

moderate or minor injury if the warning is ignored.

Puncture

Crushing

Environmental damage

Symbol Type of danger

DANGER

Type and source of danger!

Consequences of non-compliance.

Measures for avoiding the danger.

WARNING

Type and source of danger!

Consequences of non-compliance.

Measures for avoiding the danger.

CAUTION

Type and source of danger!

Consequences of non-compliance.

Measures for avoiding the danger.

Safety

12 Service Instructions 755 S - 02.0 - 03/2019

 This is what a warning looks like for a hazard that could result in

environmental damage if ignored.

 This is what a warning looks like for a hazard that could result in

property damage if ignored.

CAUTION

Type and source of danger!

Consequences of non-compliance.

Measures for avoiding the danger.

NOTICE

Type and source of danger!

Consequences of non-compliance.

Measures for avoiding the danger.

Working basis

Service Instructions 755 S - 02.0 - 03/2019 13

3 Working basis

3.1 Gages

The locking peg (part number 0367 105950) is included with the machine as

a standard tool in the accessory pack. It can be used to peg the machine

head in place at the Loop stroke position or at the Needle at top dead center

position.

3.2 Locking the machine in place

Fig. 1: Locking the machine in place

The arm shaft crank (2) is equipped with a large arresting groove (3)

(5 mm) and a small arresting groove (5) (3 mm).

WARNING

Risk of injury from moving parts!

Crushing possible.

Do not reach into the tabletop cutout when the

machine head is swiveled up.

Switch off the machine before adjusting the

machine head settings.

(1) - Hole

(2) - Arm shaft crank

(3) - large arresting groove

(4) - Locking peg

(5) - small arresting groove

①②③

④

⑤

Working basis

14 Service Instructions 755 S - 02.0 - 03/2019

The machine head can be pegged into place in the hole (1) using the lock-

ing peg (4).

There are 2 securing positions:

• Position 1: Loop stroke position

• 5 mm end in the large arresting groove (3)

• Setting the loop stroke and needle bar height

• Position 2: Handwheel zero position

• 3 mm end in the small arresting groove (5)

• Setting the handwheel position and checking the top dead center

for the needle bar

3.3 Swiveling up the machine head

The machine head can be swiveled up for maintenance work. This requires

that the transport carriage be in its rear position.

Fig. 2: Swiveling up the machine head (1)

To swivel up the machine head:

1. Pull the handle of the folding station to the left.

2. Swivel the folding station out by 90°.

NOTICE

Property damage may occur!

Possible damage to the light barriers or needle breakage.

Do NOT grab the machine head in the area of the light barriers or the

needles when swiveling it up.

(1) - Locking lever (2) - Fabric sliding plate

①

②

Working basis

Service Instructions 755 S - 02.0 - 03/2019 15

3. Remove the fabric sliding plate (2).

4. Swivel the locking lever (1) up.

Fig. 3: Swiveling up the machine head (2)

5. Lift and carefully swivel up the machine head.

 The latch (3) locks into place as well.

The space below the stand is accessible for cleaning and setting

operations.

(3) - Latch

③

Working basis

16 Service Instructions 755 S - 02.0 - 03/2019

3.4 Swiveling down the machine head

Fig. 4: Swiveling down the machine head (1)

To swivel down the machine head:

1. Raise the machine head until the latch (1) disengages.

2. Lower the machine head carefully.

NOTICE

Property damage may occur!

Possible damage to the light barriers or needle breakage.

Do NOT grab the machine head in the area of the light barriers or the

needles when swiveling it down.

(1) - Latch

①

Working basis

Service Instructions 755 S - 02.0 - 03/2019 17

Fig. 5: Swiveling down the machine head (2)

3. Swivel the locking lever (2) down.

4. Swivel down the folding station and lock it into place.

5. Insert the fabric sliding plate (3).

3.5 Setting the handwheel scale

Fig. 6: Setting the handwheel scale

Proper setting

The machine is locked in place at position 2 ( p. 13).

The handwheel is at position 0°.

(2) - Locking lever (3) - Fabric sliding plate

②

③

(1) - Slot (2) - Marking

①

②

Working basis

18 Service Instructions 755 S - 02.0 - 03/2019

To set the handwheel scale:

The handwheel is fastened using 2 threaded pins, which you can see

through the slot (1).

1. Turn handwheel until the first threaded pin is under the slot (1).

2. Loosen the threaded pin through the slot (1).

3. Turn the handwheel by 50° such that the second threaded pin is under

the slot (1).

4. Loosen the threaded pin through the slot (1).

5. Lock the machine in place at position 2 ( p. 13).

6. Turn the handwheel scale so that the 0° is at the center of

the marking (2).

7. Tighten the threaded pin through the slot (1).

8. Remove the lock.

9. Move the handwheel into the 50° position.

10. Tighten the threaded pin through the slot (1).

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Duerkopp Adler 755 S User manual

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