Name: DURKOPP ADLER 755 A
Brand: DURKOPP ADLER
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Additional equipment

232 Service Instructions 755 A/756 A - 00.0 - 02/2019

27.3 Setting the downholder

WARNING

Risk of injury from moving parts!

Crushing possible.

Switch off the machine before setting the

downholder.

NOTICE

Property damage may occur!

The downholder can become damaged by colliding with the

transport clamps.

Set the downholder as described.

Default Chapter3
- Table of Contents3
1 About These Instructions9
- For Whom Are These Instructions Intended9
- Representation Conventions - Symbols and Characters9
- Other Documents11
- Liability11
2 Safety13
- Basic Safety Instructions13
- Signal Words and Symbols Used in Warnings14
3 Working Basis17
- Gages17
- Locking the Machine in Place17
- Swiveling up the Machine Head18
- Swiveling down the Machine Head20
- Setting the Handwheel Scale22
4 Aligning the Machine Head23
5 Disassembling and Assembling the Machine Head27
- Disassembling the Machine Head27
- Assembling Machine Head28
6 Needle Bar30
- Non-Switchable Needle Bar (Class 755)30
- Aligning the Needle Bar with the Throat Plate30
- Setting the Needle Bar Height34
- Changing the Needle Holder36
- Disassembling the Needle Bar Linkage37
- Assembling the Needle Bar Linkage39
- Switchable Needle Bar (Class 756)42
- Aligning the Needle Bars with the Throat Plate42
- Setting the Needle Bar Height45
- Changing the Needle Holder46
- Disassembling the Needle Bar Linkage47
- Assembling the Needle Bar Linkage50
- Disassembling the Needle Bar Linkage56
- Assembling the Needle Bar Linkage60
- Setting the Needle Transport64
7 Hook66
- Changing the Hook66
- Setting the Loop Stroke67
- Setting the Distance between Hook Tips and Needles69
- Setting the Needle Guard71
- Setting the Bobbin Case Lifter73
- Setting the Timing for Opening74
- Setting the Lifting Gap76
8 Setting the Safety Clutch77
- Engaging the Safety Clutch77
- Setting the Torque78
9 Setting the Remaining Thread Monitor79
10 Middle Knife80
- Changing the Drive Motor80
- Disassembling the Drive Motor80
- Assembling the Drive Motor82
- Setting the Middle Knife83
11 Setting the Thread Tension Spring86
12 Setting the Trimming and Clamping Device for the Needle Threads87
- Testing the Function of the Trimming and Clamping Device for the Needle Threads88
- Replacing Knives and Thread-Pulling Knife89
- Setting the Thread-Pulling Knife to a Different Needle Distance92
- Converting the Trimming and Clamping Device93
13 Setting the Trimming and Clamping Device for the Hook Threads94
- Changing the Knives95
- Setting the Height of the Hook Thread Trimmer96
- Testing the Hook Thread Trimmer97
14 Needle Thread Advancing Device98
- Adjusting the Needle Thread Quantity98
- Setting the Movement of the Needle Thread Advancing Device99
15 Changing the Sewing Motor100
16 Setting the Folding Station Plate103
17 Folder105
- Assembling the Folder105
- Aligning the Folder with the Needles106
- Aligning the Folder with the Middle of the Pocket Opening107
- Setting the Guide Plates at the Folder109
- Setting the Stroke Movement for the Folder111
- Setting the Folder Detection115
18 Transport Carriage117
- Setting the Reference Position of the Transport Carriage117
- Setting the Front End Position of the Transport Carriage118
- Changing the Toothed Belt120
- Setting the Toothed Belt Tension122
19 Transport Clamps125
- Setting the Height of the Transport Clamps126
- Changing the Transport Clamps127
- Aligning the Transport Clamps with the Sliding Plate Edge128
- Setting the Distance of the Transport Clamps to the Folder Sole129
- Setting the Distance of the Transport Clamps to the Folder Sole (Manually)130
- Setting the Distance of the Transport Clamps to the Folder Sole (Motorized)132
- Setting the Blowing of the Piping Strips134
- Setting the Transport Clamp Pressure136
- Setting the Transport Clamp Pressure Manually136
- Setting the Programmable Transport Clamp Pressure137
- Changing the Toothed Belt of the Motorized Transport Clamp137
20 Automatic Corner Knife Station (Straight Pocket)139
- Adjusting the Corner Knives Mechanically139
- Setting the Initial Position of the Corner Knives140
- Testing the Initial Position of the Corner Knives Manually141
- Testing and Adjusting the Corner Knives Electrically144
- Aligning the Corner Knife Station with the Seams147
- Setting the Angle of the Corner Knife Incisions148
- Replacing Corner Knives149
21 Automatic Corner Knife Station (Straight/Slanted Pocket)150
- Adjusting the Corner Knives Mechanically150
- Setting the Initial Position of the Corner Knives151
- Setting the Piercers152
- Setting the Corner Knife Inclination153
- Testing the Initial Position of the Corner Knives Manually155
- Testing and Adjusting the Corner Knives Electrically158
- Aligning the Corner Knife Station with the Seams162
- Setting the Angle of the Corner Knife Incisions163
- Replacing Corner Knives164
22 Multi-Functional Corner Knife Station165
- Adjusting the Corner Knives Manually165
- Setting the Initial Position of the Corner Knives166
- Setting the Piercers167
- Setting the Corner Knife Inclination168
- Testing the Initial Position of the Corner Knives Manually169
- Setting the Speed and the End Position Damping of the Corner Knives173
- Setting the Speed173
- Setting the End Position Damping174
- Testing and Adjusting the Corner Knives Electrically175
- Aligning the Corner Knife Station with the Seams180
- Setting the Angle of the Corner Knife Incisions182
- Replacing Corner Knives183
- Changing the Reference Switch on the Corner Knife Support184
23 Marking Lamps185
- Setting the Stationary Marking Lamps186
- Setting the Programmable Marking Lamp Vertical (Optional)187
24 Light Barriers189
- Setting the Light Barrier Holder189
- Aligning the Light Barriers191
- Setting the Correction Values for the Flap198
- Aligning the Air Nozzles for Cleaning the Reflecting Foils198
25 Assembling the Vacuum Unit (Optional)201
26 Endless Zipper Feed (Optional)203
- Threading and Activating the Zipper203
- Setting the Guide Rails at the Folder206
- Setting the Lifting Movement of the Guide Plates207
- Zipper Cutter209
- Changing the Knives209
- Setting the Height of the Zipper Cutter211
- Setting the Position of Knife and Counter Blade212
- Setting the Swivel Width213
- Setting the Swivel Speed of the Zipper Cutter214
- Setting the End Position Damping215
- Driver Zipper217
- Setting the Distance between the Driver Zipper and the Needles217
- Setting the Driver Zipper Limit219
- Setting the Speed of the Driver Zipper220
- Setting the Folder Height When the Zipper Is Cut221
27 Additional Equipment223
- Setting the Outfeed Roller223
- Tape Feeder225
- Assembling the Tape Feeder and Inserting the Reinforcement Strip225
- Setting the Height of the Tape Feeder228
- Changing the Knives229
- Changing the Conveyor Belt231
- Setting the Downholder234
- Assembling the Pocket Bag Clamp237
28 Stacker239
- Pincer Stacker239
- Assembling the Pincer Stacker240
- Setting the Pincer Stacker243
- Activating the Pincer Stacker244
- Throw-Over Stacker245
- Assembling the Throw-Over Stacker245
- Aligning the Throw-Over Stacker250
- Activating the Throw-Over Stacker252
- Setting the Stacking Speed252
- Setting the Stack Removal253
- Setting the Sewing Material Surface254
- Setting the Position of the Stops255
- Setting the Stacker Brackets256
- Replacing Pneumatic Cylinders, Pneumatic Valve and Coupling Rods259
- Setting the Pneumatic Switch265
29 Programming267
30 Maintenance439
- Cleaning440
- Lubricating442
- Lubricating the Machine Head443
- Lubricating the Hook444
- Servicing the Pneumatic System445
- Setting the Operating Pressure445
- Draining the Water Condensation446
- Cleaning the Filter Element447
- Parts List448
31 Decommissioning449
32 Disposal451
33 Troubleshooting453
- Customer Service453
- Messages of the Software453
34 Technical Data471
35 Appendix473
- Wiring Diagram473
- Pneumatic Diagram488

Brand	DURKOPP ADLER
Model	755 A
Category	Sewing Machine
Language	English

DURKOPP ADLER 755 A User Manual

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