Duerkopp Adler 743-121 Service Instructions Manual
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Also See for 743-121:
- Operating instructions manual (14 pages) ,
- Installation instructions manual (7 pages)
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Contents
Part 3: Service Instructions for the 743-121
1.
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
2.1
Arm Shaft Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Needle Evasion Movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Symmetry of Looper Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4
2.5
Needle Bar Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6
Needle Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7
Thread Take-up Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8
Rocker Bolt and Left Lower Shaft Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9
Hook Drive Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
3.1
Thread Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Check Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Folding Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
4.2
5.
Transport Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
Run-off Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2
Guide Roller for the Configuration Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Contact Cylinder for the Configuration Set . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1
Locking Movement for the Configuration Set . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Setting the Configuration Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents
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Summary of Contents for Duerkopp Adler 743-121
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Page 1: Table Of Contents
Contents Page: Home Part 3: Service Instructions for the 743-121 General ..........Setting the Machine Head Arm Shaft Crank . -
Page 3: General
1. General ATTENTION ! The tasks described in the service instructions must only be conducted by specialized personnel or persons with appropriate training ! Caution Risk of Injury ! Bei Reparatur-, UmFor repair, conversion and maintenance work the main switch must be turned off and the sewing unit disconnected from the pneumatic air supply. -
Page 4: Setting The Machine Head
2. Setting the Machine Head 2.1 Arm shaft crank The tracing groove of the arm shaft crank and the slot A of the adjustment ring must be in-line. Caution Risk of Injury ! Turn main switch off before adjusting. – Push the second adjustment pin 1 into the tracing hole and allow the arm shaft crank tracing groove to lock on. -
Page 5: Needle Evasion Movement
2.2 Needle Evasion Movement With needle evasion movement (ellipse width) is meant the movement which the hook makes in order to pass behind the needle when moving from right to left and infront of the needle when moving from left to right. With this sewing unit the ellipse width should be 1.9 mm. -
Page 6: Symmetry Of Looper Motion
2.3 Symmetry of Looper Motion Looper motion symmetry is set with the gauges 1 and 2 (Order no. 0933 080192). Caution Risk of Injury ! Turn the main switch off before adjusting. – Arrest the sewing unit in position A (2 grooves visible). –... -
Page 7: Hook At Needle Center
2.4 Hook at the Needle Center In position C the hook point should lie at the needle center. The distance between the hook point and the needle is 0.05...0.1 mm. Caution Risk of Injury ! Turn off the main switch before adjusting. –... -
Page 8: Needle Bar Height
2.5 Needle Bar Height The height of the needle bar is correctly set when the hook eye lies at the center of the needle and the upper edge of the needle eye lies at the center of the hook eye. Caution Risk of Injury ! Turn off main switch before adjusting. -
Page 9: Needle Guard
2.6 Needle Guard The needle guard 1 is to prevent a diversion of the needle into the path of the hook. Caution Risk of Injury ! Turn main switch off before adjusting. Preparation – Remove thread trimmer (see Section 3.1). The needle guard mounting screws 2 and 3 are more accessable. -
Page 10: Thread Take-Up Disk
2.7 Thread Take-up Disk The thread take-up disk is to touch and pull back the bobbin thread when the hook begins its return movement from left to right. Caution Risk of Injury ! Turn main switch off before adjusting. – Arrest sewing unit in position B (3 grooves visible). -
Page 11: Rocker Bolt And Left Lower Shaft Bearing
2.8 Rocker Bolt and Left Lower Shaft Bearing The distance from the needle center to the beginning of the lower shaft bearing should be 39.8 mm. The distance from the beginning of the lower shaft bearing to the end of the rocker bolt should be 1 mm. Caution Risk of Injury ! Turn main switch off before adjusting. -
Page 12: Hook Drive Housing
2.9 Hook Drive Housing The needle tip should point to the middle of the hook shaft. The distance from the upper edge of the hook shaft to the slider bed rest is 41 mm. Caution Risk of Injury ! Turn main switch off before adjusting. –... -
Page 13: Setting The Sewing Unit
3. Setting the Sewing Unit 3.1 Thread Trimmer Replacement and setting of the knives is to occur with the thread trimmer removed from the machine. Caution Risk of Injury ! Turn the main switch off before removing the thread trimmer. Removing the thread trimmer –... - Page 15 Removing the Knives – Screw out screws 4 and 5 and remove the cover plate 8 and the knife guide plate 7. – Remove the movable knife 3 downward out of the knife guide plate. This is necessary so that the knife is not damaged. –...
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Page 16: Check Spring
3.2 Thread take-up Spring The distance between the thread take-up spring 3 and the thread lever 2 should be 0.5 mm. Caution Risk of Injury ! Turn main switch off before adjusting. – Loosen screw 1 and set the distance by moving the thread take-up spring 3. -
Page 17: Folding Table
4. Folding Table Regulation and control Depending on the thickness of the material the folding plate 1 should be in parallel with the slide plate at a height of 1.5 mm above it. So the height is determined by the thickness of the material. In the 0°... -
Page 18: Folding Table Retraction
4.1 Folding Table Retraction The folding table is run out by a pneumatic cylinder and retracted by a draw spring. Caution Risk of Injury ! Turn main switch off before adjusting. Do not reach into the running sewing unit during adjustment ! –... -
Page 19: Angle Adjustment
4.2 Angle Adjustment Angle adjustment is made manually. The hand grip is pressed together and the angle set according to the scale. The set angle is held by a brake. Caution Risk of Injury ! Turn main switch off before adjusting. –... -
Page 20: Transport Carriage
5. Transport Carriage The transport carriage accepts the configuration set and moves it according to the seam configuration. The reference point must be set. Caution Risk of Injury ! Turn main switch off before adjusting. Do not reach into the running sewing unit during adjustment ! –... -
Page 21: Run-Off Protection
5.1 Run-off Protection Left run-off protection for the transport carriage occurs via the approach switch b05. Caution Risk of Injury ! Turn main switch off before adjusting. Do not reach into the running sewing unit during adjustment ! – Set the height of the approach switch 2 so that the switch plate 3 can run through without an air gap. -
Page 22: Guide Roller For The Configuration Set
5.2 Guide Roller for the Configuration Set The position of the guide roller is set with the gauge 0935 008001. The pneumatic cylinder 5 is only required by very curved seams. Caution Risk of Injury ! Turn main switch off before adjusting. –... -
Page 23: Contact Cylinder For The Configuration Set
6. Contact Cylinder for the Configuration Set The contact cylinder locks the configuration set. The contact cylinder must be able to swing free according to the seam configuration. Caution Risk of Injury ! Turn main switch off before adjusting. 1. Setting the height. –... -
Page 24: Locking Movement For The Configuration Set
6.1 Locking Movement for the Configuration Set The locking movement for the configuration set is determined by the throttle and the locking force by the pressure regulator. Caution Risk of Injury ! Turn main switch off before adjusting. Do not reach into the running sewing unit during adjustment ! 1. -
Page 25: Setting The Configuration Set
7. Setting the Configuration Set The sewing unit can be equipped with different configuration sets for diverse seam configurations. 0793 078001 Straight seam 2.5° 0793 078002 Curved seam 0793 078xxx Customer version Caution Risk of Injury ! Turn the main switch off before adjusting and remove the configuration set from the sewing unit.