Dürkopp Adler 52 i Series Service Instructions Manual
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Dürkopp Adler 52 i Series Service Instructions Manual

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52Xi-75
Service Instructions

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  • Page 1 52Xi 52Xi-75 Service Instructions...
  • Page 2 IMPORTANT READ CAREFULLY BEFORE USE KEEP FOR FUTURE REFERENCE All rights reserved. Property of Dürkopp Adler GmbH and protected by copyright. Any reuse of these contents, including extracts, is prohibited without the prior written approval of Dürkopp Adler GmbH. Copyright © Dürkopp Adler GmbH 2021...

  • Page 3: Table Of Contents

    Table of Contents About these instructions ............3 For whom are these instructions intended?........ 3 Representation conventions – symbols and characters ..... 3 Other documents ................ 5 Liability..................5 Safety ..................7 Basic safety instructions ............. 7 Signal words and symbols used in warnings ......8 Working basis .................
  • Page 4 Table of Contents Hook lifting ................42 Thread mechanism ..............44 Thread limiter and check spring..........44 Bobbin winder ................46 Thread trimming ..............47 Trimming pressure between knives .......... 47 Trimming lever ................48 Driver ..................49 Trimming cam ................50 Puller..................

  • Page 5: About These Instructions

    About these instructions 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 Ser- vice.
  • Page 6 About these instructions 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.

  • Page 7: Other Documents

    About these instructions 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.
  • Page 8 About these instructions Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 9: Safety

    Safety Safety This chapter contains basic information for your safety. Read the instruc- tions carefully before setting up or operating the machine. 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.

  • Page 10: Signal Words And Symbols Used In Warnings

    Safety Check the machine during operating for any externally visible damage. Operation 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 should not be disassembled or deactivated. If it is Safety equipment essential to disassemble or deactivate safety equipment for a repair...
  • Page 11 Safety Symbol Type of danger Puncture Crushing Environmental damage Examples of the layout of warnings in the text: Examples DANGER Type and source of danger! Consequences of non-compliance. Measures for avoiding the danger.  This is what a warning looks like for a hazard that will result in serious injury or even death if ignored.
  • Page 12 Safety CAUTION Type and source of danger! Consequences of non-compliance. Measures for avoiding the danger.  This is what a warning looks like for a hazard that could result in environmental damage if ignored. NOTICE Type and source of danger! Consequences of non-compliance.

  • Page 13: Working Basis

    Working basis Working basis 3.1 Order of the adjustments Order The setting positions for the machine are interdependent. Always comply with the order of individual adjustment steps as specified. It is absolutely essential that you follow all notices regarding prerequisites and subsequent settings that are marked with in the margin.

  • Page 14: Removing The Covers

    Working basis 3.3 Removing the covers WARNING Risk of injury from moving parts! Crushing possible. Move the machine into the service position or switch the machine off before removing the covers. WARNING Risk of injury from sharp parts! Punctures possible. Switch the machine off before removing the covers.

  • Page 15: Removing And Placing The Arm Cover

    Working basis Tilting the machine head 1. Tilt the machine head as far as it will go. Erecting the machine head 1. Erect the machine head. 3.3.2 Removing and placing the arm cover Pic. 2: Removing and placing the arm cover ②...

  • Page 16: Removing And Placing The Head Cover

    Working basis 3.3.3 Removing and placing the head cover Pic. 3: Removing and placing the head cover ① ② (1) - Head cover (2) - Screws Removing the head cover 1. Loosen the screws (2). 2. Remove the head cover (1). Placing the head cover 1.

  • Page 17: Disassembling And Assembling The Throat Plate

    Working basis 3.3.4 Disassembling and assembling the throat plate Pic. 4: Disassembling and assembling the throat plate ① ② (1) - Throat plate (2) - Screws Disassembling the throat plate 1. Loosen the screws (2). 2. Remove the throat plate (1). Assembling the throat plate 1.

  • Page 18: Disassembling And Assembling The Feed Dog

    Working basis 3.3.6 Disassembling and assembling the feed dog Pic. 6: Disassembling and assembling the feed dog ② ① (1) - Feed dog (2) - Screws Disassembling the feed dog 1. Loosen the screws (2). 2. Remove the feed dog (1). Assembling the feed dog 1.

  • Page 19: Locking The Machine In Place

    Working basis 3.5 Locking the machine in place Pic. 8: Locking the machine in place (1) ① ② ③ (1) - Arm shaft crank (3) - Locking pin (2) - Arresting groove For some settings, the machine must be locked in place. To do this, the locking pin (3) from accessory pack is inserted into a slot (2) on the arm shaft crank (1), blocking arm shaft.
  • Page 20 Working basis Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 21: Zigzag Stitch Mechanism Of Machines 523, 524, 527

    Zigzag stitch mechanism of machines 523, 524, 527 Zigzag stitch mechanism of machines 523, 524, WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting. Order The machine setting must be carried out in the sequence as described herein.

  • Page 22: Straight Stitch Alignment

    Zigzag stitch mechanism of machines 523, 524, 527 4.2 Straight stitch alignment Proper setting The centrally positioned straight stitch must be fully aligned, i. e. the nee- dle must not have any lateral motion. Pic. 11: Straight stitch alignment ① ②...

  • Page 23: Zigzag Stitch Width

    Zigzag stitch mechanism of machines 523, 524, 527 4.3 Zigzag stitch width Proper setting The zigzag stitch width setting must be limited to the value prescribed for the applied sewing equipment with the setting tolerance -5% of the pre- scribed value. Pic.

  • Page 24: Needle Stab Position Setting In Feeding Direction

    Zigzag stitch mechanism of machines 523, 524, 527 4.4 Needle stab position setting in feeding direction Proper setting If the needle is in the bottom dead center, it should be positioned in the throat plate needle hole center in feeding direction and its lost motion in the feeding direction should be as small as possible.

  • Page 25: Lateral Setting Of Needle Stab Position

    Zigzag stitch mechanism of machines 523, 524, 527 4.5 Lateral setting of needle stab position Proper setting Both dead centers of the needle lateral motion at the zigzag stitch sewing should be at the same distance from the throat plate needle hole edges. Pic.

  • Page 26: Lateral Setting Of Central Straight Stitch Position

    Zigzag stitch mechanism of machines 523, 524, 527 4.6 Lateral setting of central straight stitch position Proper setting If the central straight stitch is set, the needle position should be approxi- mately in the center of the presser foot or in the middle of the throat plate needle hole center.

  • Page 27: Lateral Setting Of Straight Stitches On Throat Plate Needle Hole Edges, Arresting Of Zigzag Stitch Setting Mechanism

    Zigzag stitch mechanism of machines 523, 524, 527 4.7 Lateral setting of straight stitches on throat plate needle hole edges, arresting of zigzag stitch setting mechanism Proper setting If the sewing equipment allows using the maximum zigzag stitch width, which is characteristic of the particular machine type, the position of the border straight stitches should be adjusted so that it aligns with the zigzag stitch border.
  • Page 28 Zigzag stitch mechanism of machines 523, 524, 527 6. Tighten the arresting nut (8 - invisible). 7. Loosen the screw (7). 8. Turn the arresting lever (5) to 1 mm space from the casing (6). 9. Tighten the screw (7). Information If the sewing equipment does not allow using the maximum zigzag stitch width, screw the regulating screw (11) into the lever (1) and fix it in the...

  • Page 29: Form Stitch Mechanism Of Machine 525

    Form stitch mechanism of machine 525 Form stitch mechanism of machine 525 WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting. Order The machine setting must be carried out in the sequence as described herein.
  • Page 30 Form stitch mechanism of machine 525 4. Set the tooth clearance as small as possible on the entire circumference of the conical worm (1). • Shift the conical worm (1) to the thread lever mechanism: Reduce the tooth clearance • Conical worm (1) shifting to the hand wheel: Increase the tooth clearance 5.

  • Page 31: Roller Bolt Position Of Form Stitch Steering Cam

    Form stitch mechanism of machine 525 5.2 Roller bolt position of form stitch steering cam Proper setting When changing the form stitch width, the stitch central axis should remain in its place. It should not shift laterally. Pic. 18: Roller bolt position of form stitch steering cam ①...

  • Page 32: Setting Of Needle Stab Position

    Form stitch mechanism of machine 525 5.3 Setting of needle stab position Proper setting If the wheel steering cam of the straight stitch is mounted, the needle should be located in both directions in the center of the throat plate needle hole.

  • Page 33: Feeding And Presser Foot

    Feeding and presser foot Feeding and presser foot WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting . 6.1 Stitch length setting mechanism Proper setting If the zero stitch length is set, the hand lever should perform no lost mo- tion.

  • Page 34: Zero Stitch Length

    Feeding and presser foot 6.2 Zero stitch length Proper setting If the zero stitch length is set, the connecting rod (3) should perform no motion. Pic. 21: Zero stitch length ① ② ③ (1) - Sleeve (3) - Connecting rod (2) - Screw 1.

  • Page 35: Feed Dog Position In Throat Plate Recess And Its Height

    Feeding and presser foot 6.3 Feed dog position in throat plate recess and its height Proper setting The feed dog should not touch the throat plate laterally. At the zero stitch length the teeth should be located in the throat plate recess center. If the feed dog is positioned in the top dead center, it should be located 1 mm over the throat plate and its top surface should be parallel with the throat plate.

  • Page 36: Timing Of Feed Dog Motion Eccentric

    Feeding and presser foot 6.4 Timing of feed dog motion eccentric Proper setting • If the needle is lifted by 1 mm from the bottom dead center, the feed dog should not move when the backtacking lever is pressed down. •...
  • Page 37 Feeding and presser foot Pic. 24: Timing of feed dog motion eccentric (2) ⑦ ⑧ (7) - Screws (8) - Pulley 8. Tighten 2 screws (7) of the pulley (8). Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 38: Backtacking With Solenoid

    Feeding and presser foot 6.5 Backtacking with solenoid Proper setting At the maximum stitch length, at the backtacking mechanism dislocation with the solenoid, its movable core should not strike the fixed one. Pic. 25: Backtacking with solenoid ① ① ② (1) - Lever (2) - Screw 1.

  • Page 39: Manual Foot Lifting

    Feeding and presser foot 6.6 Manual foot lifting Proper setting The foot stroke with the hand lever should be 5,5 mm. Pic. 26: Manual foot lifting ② ③ (1) - Hand lever (3) - Screw (2) - Driver 1. Place to bottom feed dog under the level of the throat plate top surface. 2.

  • Page 40: Foot Lifting With Knee Lever

    Feeding and presser foot 6.7 Foot lifting with knee lever Proper setting The foot stroke with the knee lever should be 12,5 mm, the space (A) = approximately 2 mm if the knee lever is in the initial position. Pic. 27: Foot lifting with knee lever ①...

  • Page 41: Foot Lifting With Solenoid

    Feeding and presser foot 6.8 Foot lifting with solenoid Proper setting The foot stroke with the solenoid is 12 mm. If the foot is lifted, the solenoid movable core should be at the stop onto the fixed core. Pic. 28: Foot lifting with solenoid ①...

  • Page 42: Needle Bar And Hook

    Needle bar and hook Needle bar and hook WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting . 7.1 Needle bar height, needle and hook point clearance Proper setting When sewing on the left, if the hook point is positioned on the needle axis, the hook point bottom edge should be located on the needle eye top edge.

  • Page 43: Bobbin Case Driver

    Needle bar and hook 7.2 Bobbin case driver Proper setting The distance between the bobbin case driver and the bobbin case groove bottom should be (A) = 0,7 mm. Pic. 30: Bobbin case driver ① ② ② (1) - Screw (2) - Driver 1.

  • Page 44: Hook Lifting

    Needle bar and hook 7.3 Hook lifting Proper setting In the direction of the hook axis there should be the space (A) = 0,8 mm between the bobbin case lifter and the hook. The maximum hook lifting should be (B) = 0,4 to 0,8 mm according to the thread thickness. The tim- ing of the lifting eccentric should enable a smooth passage of the thread between the bobbin case and the bobbin case lifter (C) = 1 mm.
  • Page 45 Needle bar and hook 5. Tighten the screw (3). 6. Loosen two screws (1), try to set the timing of the feeding eccentric and tighten the screws (1). Sew and watch the size of the space (C) at the moment when the thread is passing through the space. Correct the timing so that (C) = 1 mm.

  • Page 46: Thread Mechanism

    Thread mechanism Thread mechanism WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting . 8.1 Thread limiter and check spring Proper setting The thread limiter (1) should be positioned horizontally. The screw (2) should be located in the center of its groove.
  • Page 47 Thread mechanism Pic. 33: Seřízení napínače niti ⑦ ⑧ ⑨ (7) - Bolt (9) - Screw (8) - Stop 3. Loosen the screw (9). 4. Turn the bolt (7) by the screwdriver clockwise until the spring hits the stop (8), then continue turn approximately 80° - 90° (according to the thread), to achieve the prescribed pre-tension.

  • Page 48: Bobbin Winder

    Thread mechanism 8.2 Bobbin winder Proper setting If the bobbin winder is switched off, the space between the driving and driven wheels of the bobbin winder should be as small as possible, but they must not touch each other. When winding the thread, the bobbin winder should automatically switch off when the thread is wound up to 0,5 mm under the bobbin outer diam- eter.

  • Page 49: Thread Trimming

    Thread trimming Thread trimming WARNING Risk of injury from moving parts! Crushing possible. Switch off the machine before checking and setting . 9.1 Trimming pressure between knives Proper setting The trimming pressure should be as large as possible, however, the knives should be on touch within the last part of the trimming knife path only.

  • Page 50: Trimming Lever

    Thread trimming 9.2 Trimming lever Proper setting The trimming lever (2) should be located as high as possible, but it should not rub the plate (1). The eccentric bolt (6) groove should be in horizontal position. Pic. 36: Trimming lever ①...

  • Page 51: Driver

    Thread trimming 9.3 Driver Proper setting If the driver (4) touches the casing (5), the knife (2) should be on the plate edge (1). Pic. 37: Driver ⑤ ① ④ ② ③ (1) - Plate (4) - Driver (2) - Trimming knife (5) - Casing (3) - Screw 1.

  • Page 52: Trimming Cam

    Thread trimming 9.4 Trimming cam Proper setting If the trimmer is not active, then the shortest distance between the cam (1) and roller (3) should be (A) = 0,2 mm. Pic. 38: Trimming cam ④ ③ ② ③ ① ① (1) - Cam (3) - Roller (2) - Ring...

  • Page 53: Puller

    Puller 10 Puller WARNING Risk of injury! Switch off the machine before the Puller setting. Proper setting The puller (3) swill automatically lift at the presser foot lifting and backtack- ing. The function must be entered on the control panel, see Operating In- structions, chapter 4.14.2.

  • Page 54: Synchronous Operation Of Bottom Feed And Puller

    Puller 10.1 Synchronous operation of bottom feed and puller Proper setting The bottom feed and the upper puller should operate synchronously. The upper puller motion must be unconditionally finished before the feed dog moves.  The sewn material remains under tension between the presser foot and the puller, thus minimizing the seam ripples at the stitch tighten- ing.

  • Page 55: Distance From Puller To Needle

    Puller 10.2 Distance from puller to needle Proper setting The distance between the feeding wheel center and the needle axis is 29 mm. Important If the distance is set anew, then the upper as well as bottom end position also must be set anew! ( p. 54) Pic.

  • Page 56: Puller Lifting

    Puller 10.3 Puller lifting Proper setting The lifted upper puller at the end position must not strike the presser foot. At the bottom end position after the puller placing on the throat plate the frame (1) must deflect by approximately another 0.5 mm before the hand lever stop reaches its end position.
  • Page 57 Puller Correction of upper end position 1. Turn the pin (2).  The pin groove (2) must be parallel with the cylinder (5) axis. 2. Set a limit to the cylinder stroke (3).  Set the adjusting screw by means of a hexagonal key 2.5 mm according to the correct setting.

  • Page 58: Toothed Belt Tensioning

    Puller 10.4 Toothed belt tensioning Proper setting Toothed belts should be tensioned to guarantee a precise transfer of step lengths. Important A too high tension of the belt can result in an exceeding wear and a faulty function. Pic. 43: Toothed belt tensioning ①...

  • Page 59: Puller Pressure

    Puller 10.5 Puller pressure Proper setting The puller pressure must be adjusted to the sewn material. Important If the pressure was re-set, then the upper end position must be set anew! ( p. 54) Pic. 44: Puller pressure ① ② (1) - Pneumatic cylinder (2) - Screw 1.

  • Page 60: Feeding Wheel Replacement

    Puller 10.6 Feeding wheel replacement Important If the rubber-coated feeding wheel is replaced with a toothed one or vice versa, then the bottom end position must be set anew! ( p. 54) Pic. 45: Feeding wheel replacement 1 ① ② ③...
  • Page 61 Puller 1. Unscrew the screw (1) with the washer (2). 2. Remove the lever (3) 3. Dismantle the nut (4). Beware of the left-handed threading! 4. Fix the shaft (6) at the other end with a screwdriver. 5. Replace the feeding wheels (5). 6.

  • Page 62: Setting Of Cam Torsion Spring Pressure On Step Length Setting Wheel Screw

    Puller 10.7 Setting of cam torsion spring pressure on step length setting wheel screw Pic. 48: Setting of cam torsion spring ① ⑧ ② ⑦ ③ ④ ⑤ ⑥ ⑥ ⑤ (1) - Setting wheel (5) - Rod (2) - Setting wheel screw (6) - Hexagonal key 3 mm (3) - Cam (7) - Setting screws...

  • Page 63: Disk Brake Pressure Setting

    Puller 10.8 Disk brake pressure setting Proper setting The spring is to be pressed to the value of 17 mm. Pic. 49: Disk brake pressure setting 17 mm ① ② ③ ④ (1) - Fastening screws (3) - Spring (2) - Setting ring (4) - Brake disc 1.

  • Page 64: Electronic Control And Sewing Machine Drive

    Electronic control and sewing machine drive 11 Electronic control and sewing machine drive DANGER Risk of injury from electricity! Unprotected contact with electricity can result in serious injuries or death. Work on the electrical system must ONLY be carried out by qualified electricians or appropriately trained and authorized personnel.
  • Page 65 Electronic control and sewing machine drive Description of PCB plugs (S373 020002) Pic. 50: PCB ① (1) - PCB S373 020002 Description of connectors: R1autoselect resistor X11machine interface X12button panel X13NK - needle cooling+24V - power supply VR - backtackingFL - foot lifting FA - thread trimmingFSPL - tread tension FW - thread wiperTWA - Puller X14light barrier...
  • Page 66 Electronic control and sewing machine drive Example of puller connection: Power supply for the ventil of pullerlifting is connected to the pins +24V and TWA on the socket X13. Pic. 51: Puller connection Puller (ventil) Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 67: Maintenance

    Maintenance 12 Maintenance WARNING Risk of injury from sharp parts! Punctures and cutting possible. Prior to any maintenance work, switch off the machine. WARNING Risk of injury from moving parts! Crushing possible. Prior to any maintenance work, switch off the machine.

  • Page 68: Cleaning

    Maintenance 12.1 Cleaning WARNING Risk of injury from flying particles! Flying particles can enter the eyes, causing injury. Wear safety goggles. Hold the compressed air gun so that the particles do not fly close to people. Make sure no particles fly into the oil pan. NOTICE Property damage from soiling! Sawing dust and thread residues can impair the operation of...
  • Page 69 Maintenance Pic. 52: Cleaning ① ② ③ ④ (1) - Area around the needle (3) - Hook (2) - Area under the throat plate (4) - Knife on the winder Areas particularly susceptible to soiling: • Area around the needle (1) •...

  • Page 70: Lubricating

    Maintenance 12.2 Lubricating CAUTION Risk of injury from contact with oil! Oil can cause a rash if it comes into contact with skin. Avoid skin contact with oil. If oil has come into contact with your skin, wash the affected areas thoroughly. NOTICE Property damage from incorrect oil! Incorrect oil types can result in damage to the machine.

  • Page 71: Lubricating The Machine Head

    Maintenance 12.2.1 Lubricating the machine head Pic. 53: Lubricating the machine head ① ② ③ (1) - Oil filler opening (3) - MIN marking (2) - MAX marking Proper setting The oil level must not raise above the MAX marking (2) or drop below the MIN marking (3).

  • Page 72: Hook Lubrication

    Maintenance 12.2.2 Hook lubrication The optimal oil quantity for hook lubrication is specified by the factory. Hold a piece of blotting paper next to the hook and step on the pedal. Proper setting 1. The regulating screw (1) must be tightened so that the clamp (2) lightly grips the hose with lubricating wick (3).

  • Page 73: Parts List

    Maintenance 12.3 Parts list A parts list can be ordered from Dürkopp Adler. For more information visit our website: www.minerva-boskovice.cz www.duerkopp-adler.com Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...
  • Page 74 Maintenance Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 75: Decommissioning

    Decommissioning 13 Decommissioning WARNING Risk of injury from a lack of care! Serious injuries may occur. ONLY clean the machine when it is switched off. Allow ONLY trained personnel to disconnect the machine. CAUTION Risk of injury from contact with oil! Oil can cause a rash if it comes into contact with skin.
  • Page 76 Decommissioning Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 77: Disposal

    Disposal 14 Disposal CAUTION Risk of environmental damage from improper disposal! Improper disposal of the machine can result in serious environmental damage. ALWAYS comply with the national regulations regarding disposal. The machine must not be disposed of in the normal household waste. The machine must be disposed of in a suitable manner in accordance with all applicable national regulations.
  • Page 78 Disposal Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021...

  • Page 79: Errors In The Sewing Process

    Errors in the sewing process 15 Errors in the sewing process Error Possible causes Remedial action Unthreading at seam Needle thread tension is Check needle thread tension beginning too firm Thread breaking Needle thread and hook Check the threading path thread have not been threaded correctly Needle is bent or sharp-...
  • Page 80 Errors in the sewing process Error Possible causes Remedial action Loose stitches Thread tensions are not Check the thread tensions adjusted to the sewing material, the sewing material thickness or the thread used Needle thread and hook Check the threading path thread have not been threaded correctly Needle breakage...

  • Page 81: Technical Parameters

    Technical parameters 16 Technical parameters 525i 811001 525i 811201 525i 811202 523i 411001 524i 811001 525i 847001 527i 811001 Technical parameters Unit 523i 447001 524i 847001 525i 847201 527i 847001 525i 847202 525i 911001 525i 947001 Zig zag stitch max. width [mm] Maximum sewing speed for [RPM]...
  • Page 82 Technical parameters Stitch type double thread zig-zag lockstich Stitch length maximum 5 mm Foot lifting with hand lever 5.5 mm Foot lifting with knee lever or solenoid 12 mm Needle system 134; 134-35; 134-35 LR Manually controlled subclass DC motor - positioning motor without fur- ther functions Solenoid controlled subclass DC motor (AC servo) - positioning motor...
  • Page 84 DÜRKOPP ADLER GmbH Potsdamer Str. 190 33719 Bielefeld Germany Telefon: +49 (0) 521 925 00 e-mail: service@duerkopp-adler.com www.duerkopp-adler.com...

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