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Contents
Part 3: Maintenance Instructions 739-23
1.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Adjusting machine head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Description of integrated adjusting screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Position of integrated adjusting disc to arm shaft . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4
Height of needle bar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5
Loop stroke and distance between hook tip and needle. . . . . . . . . . . . . . . . . . . . . . . .
2.6
Alignment of hook drive housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7
Bobbin case holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8
Lubrication of hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9
Needle thread tensioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10
Thread tensioning spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11
Thread scissors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12
Edge cutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.1 Replacement of blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.2 Adjustment of cutting pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.3 Lubrication of blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.4 Resharpening of blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.5 Blade drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.6 Reference switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.7 Replacement of toothed belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.8 Edge cutter zero point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.13
Winder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.14
Synchronizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Transport devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
Adjustment of linear guide to table-top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Distance of material clamp guide to table-top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3
Material clamp guide at right angles to bed-plate of sewing machine. . . . . . . . . . . . . . . .
3.4
Transport slide and toothed belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Replacement of toothed belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 Tension of toothed belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5
Toothed belt and material clamp transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 Tension of toothed belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6
Needle position in relation to the material clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7
Material clamp guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Material clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Clamping force of the material clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents
Related Manuals for Duerkopp Adler 739-23
Summary of Contents for Duerkopp Adler 739-23
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Page 1: Table Of Contents
Contents Page: Part 3: Maintenance Instructions 739-23 Introduction ..........Adjusting machine head . - Page 2 Contents Page: Lubrication ..........Oil circuit .
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Page 3: Introduction
Introduction This maintenance manual describes the tasks for the adjustment of the sewing machine in the appropriate sequence. CAUTION! Certain settings and positions are related to each other. The individual adjustments must therefore be made in the instructed sequence. All maintenance work described in these instructions must be carried out by suitably trained and instructed staff! Risk of damage! -
Page 4: Adjusting Machine Head
Adjustment of sewing machine head 2.1 Gauges The gauges listed in the following table allow for the precise adjustment and inspection of the sewing machine. No.Setting gauge Order No. Application Gauge 0216 001069 Height of needle bar Setting pin 9301 022608 Locking of sewing machine in position A-F Gauge 0271 000767... -
Page 5: Description Of Integrated Adjusting Screw
2.2 Description of integrated adjusting screw By means of the retention pin 3 and the adjusting disc 4 integrated in the toothed belt wheel, the sewing machine can be locked in the current setting positions. The adjusting disc is equipped with 6 recesses that are labeled on the hand wheel as A, B, C, D, E and F. -
Page 6: Position Of Integrated Adjusting Disc To Arm Shaft
2.3 Position of integrated adjusting disc to arm shaft crank CAUTION! All adjustments carried out by means of the adjusting disc are only correct, if the adjusting disc is set as described in these instructions. If the arm shaft is moved, the following settings and position must be inspected and corrected, if necessary. -
Page 7: Height Of Needle Bar
2.4 Height of needle bar Caution! Risk of injury! Switch off main switch. Check and adjust height of needle bar only when the sewing machine is switched off. Instruction and inspection In setting position A (loop stroke position) , the hook tip 4 must be located at the centre of the needle scarf 5. -
Page 8: Loop Stroke And Distance Between Hook Tip And Needle
2.5 Loop stroke and distance between hook tip and needle Caution! Risk of injury! Switch off main switch! Adjust loop stroke and distance of the hook tip to the needle only when the sewing machine is switched off. Instruction and inspection The loop stroke is the way the needle bar completes from the lower dead centre to the point where the hook tip is positionled at the centre of the needle. -
Page 9: Alignment Of Hook Drive Housing
2.6 Hook drive housing Caution! Risk of injury! Switch off main switch. Check and adjust position of hook drive housing only when the sewing machine is switched off. Instruction and inspection The hook drive housing 6 is factory-aligned. Only adjust the housing in exceptional circumstances! If the hook drive housing is correctly aligned, the distance between the back of the hook 2 and the set collar 1 must be approx. - Page 10 Distance between hook and set collar – Loosen securing screws 6 of the hook drive housing 7. – Move hook drive housing 7 to the side. There must be a distance of 0.4 mm between the hook 2 and the set collar 1.
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Page 11: Bobbin Case Holder
2.7 Bobbin case holder Caution! Risk of injury! Switch off main switch! Adjust bobbin case holder only when the sewing machine is switched off. CAUTION! The adjustment may only be carried out within the highlighted area 3 (see drawing). In the area of the holder nose 1, there is a risk of breakage exists, due to the hardness. -
Page 12: Lubrication Of Hook
2.8 Lubrication of hook CAUTION! The 739-23 sewing machine is equipped with an oil-free hook. The adjusting screw 1 has thus no function. 3-12... -
Page 13: Needle Thread Tensioner
2.9 Needle thread tensioner Caution! Risk of injury! Switch off main switch ! Adjust needle thread tensioner only when the sewing machine is switched off. Instruction and inspection Press axis 1 of the needle thread tension to open it by approx. 1 mm. Adjustment –... -
Page 14: Thread Tensioning Spring
2.10 Thread tensioning spring Caution! Risk of injury! Switch off main switch! Adjust thread tensioning spring only when the sewing machine is switched off. Instruction and inspection The thread tensioning spring 1 must hold the needle thread tense until the needle point has penetrated the sewing material. Thread run adjustment –... -
Page 15: Thread Scissors
2.11 Thread scissors To replace and adjust the blades, dismantle the tread scissors. Caution! Risk of injury! Before dismantling the thread scissors, switch off the main switch. Dismantling of thread scissors – Swivel machine head to the left. – Pull out hose 1. –... - Page 16 Dismantling of blades – Remove screws 7 and 10, remove covering plate 9 and blade-guiding plate 8. – Pull movable blade 6 downwards and remove it from the blade-guiding plate 8. This is necessary to ensure that the blade is no damaged. –...
- Page 17 Replacement of piston The movable blade is lifted pneumatically. The piston operating the blade is installed in the body part of the scissors. CAUTION! The thread surface of the hole is anodised. When replacing the piston, ensure that the anodised layer is not damaged! –...
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Page 18: Edge Cutter
2.12 Edge cutter 2.12.1 Replacement of blades Caution! Risk of injury! Switch off main switch! Adjust edge cutter only when the sewing machine is switched off. Dismantling – Loosen counternuts and turn pressure screws 2 and 3 back by approx. two revolutions. –... - Page 19 Installation – Remove throat plate. – Insert a new needle. – Secure a new fixed blade 10 onto the knife holder. In cutting mode, the edge cutter rotates around the centre of the needle. The needle must be aligned at the centre of the stitch hole of the fixed blade in all positions shown above.
- Page 20 – Replace throat plate and slightly tighten throat plate screws. – Adjust the height of the fixed blade. Allow for a distance of approx. 0.2 mm between the bottom edge of the blade and the top of the throat plate. In all three positions shown above, the fixed blade must be in contact with the throat plate button 15 and rotate smoothly.
- Page 21 – Slightly loosen screws 8 and insert press pad 10. – Slightly tighten screws 8. – Adjust the height of press pad 10. The height of the press pad must be adjusted to suit the thickest sewing material. Ensure that no material is piled up in front of the press pad.
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Page 22: Adjustment Of Cutting Pressure
2.12.2 Adjustment of cutting pressure Caution! Risk of injury! Switch off main switch! Adjust cutting pressure only when the sewing machine is switched off. Instruction and inspection The devices must be adjusted in such a manner that proper cuts are achieved at minimum pressure. -
Page 23: Lubrication Of Blades
2.12.3 Lubrication of blades Caution! Risk of injury! Switch off main switch! Lubricate blades only when the sewing machine is switched off. Instruction The edge cutter must be lubricated daily with a few drops of oil. Lubrication of blades – Apply one drop of oil onto the pressure screws 1 and 2, the blade edges 3 and the closely fitting surfaces of the blades. -
Page 24: Resharpening Of Blades
2.12.4 Resharpening of blades Resharpen the blades that are made in hard metal (Widia) diamond disc. For dimensions, please refer to the above drawing. CAUTION! The height of movable blade may not be less than 50 mm, as otherwise, the blade stroke cannot be adjusted properly. 3-24... -
Page 25: Blade Drive
2.12.5 Blade drive Caution! Risk of injury! Switch off main switch! Adjust blade drive only when the sewing machine is switched off. Instruction and inspection If the eccentric 1 of the drive motor is at the lower dead centre, approximately ¾ of the length of the cutting edge of the movable blade must be below the cutting edge of the fixed blade. -
Page 26: Reference Switch
2.12.6 Reference switch Caution! Risk of injury! Switch off main switch ! Check and adjust reference switch only when the sewing machine is switched off. Instruction and inspection Allow for a distance of 0.5 - 1.0 mm between the reference switch 2 and the blade holder 3. -
Page 27: Replacement Of Toothed Belt
2.12.7 Replacement of toothed belt Caution! Risk of injury! Switch off main switch ! Replace toothed belt only when the sewing machine is switched off. – Remove guard plates 2 and 3. – Swivel sewing machine head to the left. –... -
Page 28: Edge Cutter Zero Point
2.12.8 Zero point of cutter Instruction and inspection When the material clamp is inserted, the blades of the edge cutter 1 must point towards the material clamp. – Switch on sewing machine. – Press “OK”. The reference run is carried out. The edge cutter is moved to its initial position. -
Page 29: Winder
2.13 Winder Instruction and inspection The winder must switch off automatically as soon as the bobbin is filled up to 0.5 mm from the bobbin edge. Caution! Risk of injury! Switch off main switch! Adjust winder only when the sewing machine is switched off. 1. -
Page 30: Synchronizer
2.14 Synchronizer Instruction and inspection After the thread is cut, the sewing machine should come to a halt in position C of the adjusting disc. The distance between the synchronizer 3 and the switching curve 4 must be approx. 0.5 mm to 1.0 mm. Caution! Risk of injury! Switch off main switch! Adjust synchronizer only when the sewing machine is switched off. -
Page 31: Transport Devices
Transport unit 3.1 Adjustment of linear guide to the table-top Instruction and inspection During its run, the material clamp guide 1 must always have the same distance to the table-top surface. – Measure the distance between the guide and the table-top to the left and to the right. -
Page 32: Distance Of Material Clamp Guide To Table-Top
3.2 Distance of material clamp guide to table-top Instruction and inspection The distance of the material clamp guide 1 to the surface of the table-top 2 must be at least 2.5 mm. The distance must be the same along the entire length of the guide. –... -
Page 33: Material Clamp Guide At Right Angles To Bed-Plate Of Sewing Machine
3.3 Material clamp guide at right angles to bed-plate of sewing machine Instruction and inspection The guide 1 must be at an angle of 90° degrees to the bed-plate of the sewing machine 2. – Measure the angle between the bed-plate 2 and the guide 1. Caution! Risk of injury! Switch off main switch! Adjust guide only when the sewing machine is switched off. -
Page 34: Transport Slide And Toothed Belt
3.4 Transport slide and toothed belt 3.4.1 Replacement of toothed belt Caution! Risk of injury! Switch off main switch! Adjust guide only when the sewing machine is switched off. Remove toothed belt – Loosen counternuts 9 at the rear belt wheels. –... -
Page 35: Tension Of Toothed Belt
3.4.2 Adjustment of toothed belt tension Caution! Risk of injury! Switch off main switch! Check and adjust tension of toothed belt only when the sewing machine is switched off. Instruction and inspection When the material clamp guide is in its end position at the front, it should be possible to slightly squeeze the toothed belt. -
Page 36: Toothed Belt And Material Clamp Transport
3.5 Toothed belt and material clamp transport 3.5.1 Tension of toothed belt Caution! Risk of injury! Switch off main switch! Check and adjust tension of toothed belt only when the sewing machine is switched off. Consequences of excessive belt tension –... -
Page 37: Needle Position In Relation To The Material Clamp
3.6 Needle position in relation to the material clamp CAUTION! Risk of breakage! Prior to the adjustment of the needle position in relation to the material clamp, remove the blades and the sewing foot. After the adjustment or replacement of the belt is completed, the position of the needle in relation to the material clamp must be readjusted. - Page 38 Adjustment of setting – To select a direction, press the corresponding key. Key “1": X position Key ”2": Y position Example: Change of X position – Press key “3". Press ” “ or ”“ key. The needle position is moved in the selected direction and relative to the material clamp in steps of 1/10 mm .
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Page 39: Material Clamp Guide
3.7 Material clamp guide Caution! Risk of injury! Switch off main switch. Check and adjust material clamp guide only when the sewing machine is switched off. Instruction and inspection Screw 1 prevents the material clamp from slipping off the drive belt. There must be a distance of approximately 0.5 mm between screw 1 and the material clamp. -
Page 40: Material Clamps
Material clamps 4.1 Clamping force of the material clamps Instruction and inspection Depending on the thickness of the material, it might occur that the material holder cannot or only barely be closed. – Insert thin material. – Close material clamp. –... - Page 41 Lubrication Instruction and inspection The oil level in the oil tank 1 must not be below the “Minimum” mark. Caution! Risk of injury! Switch off main switch! Always switch off the sewing machine prior to carrying out work at the oil circuit.
- Page 42 5.1 Oil circuit The oil runs from the oil tank 1 to the oil sump 3. From there, the lubricating points in the arm and head sections are provided with oil. The oil emitted from the crank mechanism flows via the oil wick 2 to the oil sump 3.
- Page 43 Maintenance Caution! Risk of injury! Switch off main switch! The maintenance of the sewing machine may only be carried out when the machine is switched off. Maintenance tasks to be carried out daily or weekly respectively by the operating personnel (cleaning and lubrication) are described in the operating instructions (Part 1).
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