Duerkopp Adler 524 Service Manual
Instructions for setting individual mechanisms
524
Minerva Boskovice, a.s., Sokolská 60, CZ - 680 17 Boskovice
Tel.: +420-516 453434, 453433, 494111 Fax: +420-516 452165 http://www.minerva-boskovice.com
Edition: 01/2004 Printed: Czech Republic
Contens - Instructions for setting individual:
1. General safety instructions.............................................................................................................................................. 1
2. Introduction ........................................................................................................................................................................ 1
3. Setting of the feeder height above the throat plate.................................................................................................... 2
4. Setting of the needle and feeder movement ................................................................................................................ 2
5. Mounting of the throat plate ............................................................................................................................................ 2
6. Setting of the elliptical path of the feeder ................................................................................................................... 2
7. Setting of the feeding length .......................................................................................................................................... 3
8. Presser foot replacement ................................................................................................................................................. 3
9. Presser foot lifting setting ............................................................................................................................................... 3
10. Setting of the needle bar height ..................................................................................................................................... 3
11. Adjustment of the hook timing ........................................................................................................................................ 4
12. Setting of the middle part of the hook holder .............................................................................................................. 4
13. Setting of the opening hook of the hook ....................................................................................................................... 5
14. Dismounting and mounting of the driving belt ............................................................................................................ 5
15. Setting the needle punch into the middle of the needle groove
in the throat plate in longitudinal direction................................................................................................................. 6
16. Setting of the needle punch into the middle of the needle groove
in the throat plate in transversal direction ................................................................................................................... 6
17. Setting of the zigzag stitch mechanism for the right and left position .................................................................... 6
18. Setting of the zigzag stitch shifting ................................................................................................................................7
19. Setting of the controlling force of the zigzag stitch adjusting .................................................................................. 7
20. Setting the controlling force of the continuous adjusting of the zigzag stitch position ...................................... 7
21. Taking up of the teeth clearance in the zigzag stitch gearing................................................................................... 7
22. Setting of the needle bar and of the hook shaft position ........................................................................................... 8
23. Time setting of the control cam of the thread cutter................................................................................................... 8
24. Setting of the movable cutting knife lifting .................................................................................................................. 9
25. Setting of the upper thread tensioner releasing .......................................................................................................... 9
26. Setting of the adjusting spring function ....................................................................................................................... 9
27. Setting of the starting position of the movable thread cutter ................................................................................... 9
28. Setting of the stationary knife presure .......................................................................................................................... 9
29. Setting of the stop in the top position of the needle .................................................................................................. 1 0
30. Making an upper thread reserve ..................................................................................................................................... 1 0
31. Dismounting and mounting of the plate ........................................................................................................................ 10
32. Dismounting and mounting of the movable cutting knife .......................................................................................... 10
Instructions for setting individual mechanisms
1. General safety instructions
The non-observance of the following safety instructions can cause bodily injuries or damages to the machine.
1. The machine must only be commissioned of the instruction book and operated by persons with appropriate training.
2. Before putting into service also read the safety rules and instructions of the motor supplier.
3. The machine must be used only for the purpose intended. Use of the machine without the safety devices is not permitted. Observe
all the relevant safety regulations.
4. When gauge parts are exchanged (e.g. needle, top roller, needle plate, feed dog and bobbin) when treading, when the workplace is
left, and during service work, the machine must be disconnected from the mains by switching off the master switch or disconnecting
the mains plug.
5. Daily servicing work must be carried out only by appropriately trained persons.
6. Repairs, conversion and special maintenance work must only be carried out by technicians or persons with appropriate training.
7. For service or repair work on pneumatic systems the machine must be disconnected from the compressed air supply system.
Exceptions to this are only adjustments and functions checks made by appropriately trained technicians.
8. Work on the electrical equipment must be carried out only by electricians or appropriately trained persons.
9. Work on parts and systems under electric current is not permitted, except as specified in regulations DIN VDE 0105.
10. Conversion or changes to the machine must be authorized by us and made only in adherence to all safety regulations.
11. For repairs, only replacement parts approved by us must be used.
12. Commissioning of the sewing head is prohibited until such time as the entire sewing unit is found to comply with EC directives.
It is absolutely necessary to respect the safety instructions marked by these signs.
Danger of bodily injuries !
Please note also the general safety instructions.
IMPORTANT WARNING
In spite of all safety measures made on the machines, inappropriate actions of the operator may lead to dangerous situations. In industrial
sewing machines, attention should be paid to the following still remaining possible sources of injury:
1. Moving sewing needle
- risk of injury when sewing with raised pressure foot or top roller, because the finger guard is then positioned too high.
2. Moving thread take-up lever
- risk of injury when inadvertently or intentionally inserting the finger(s) between the thread take-up lever and its guard.
3. Moving pressure member
- risk of injury when holding sewn work in immediate vicinity of the pressure member and beginning to insert under the pressure
member a considerably thicker sewn work portion,
- risk of injury when sinking the pressure member.
4. When switched off, the clutch motor slows down by inertia but would be reactivated by an accidental treading down of the motor
treadle. To avoid such risk, it is advised to hold the handwheel by hand and slightly to depress the motor treadle.
2. Introduction
This part contains instruction for regulating the mechanisms of the sewing machine head.
For setting the machine, simple setting aids are used which are included in the accessory of the machine. Besides these aids, universal
measuring devices are used, such as slide calliper, feeler gauges and dynamometer for measuring the thread tension.
It is adviceable to order the locating fixture S791 947001 for setting:
- the feeder planeness and and height
- the hook timing
- the hook medium part holder
- presser foot lifting
1
3. Setting of the feeder height above the throat plate (Fig. 1, 2, 3)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
The height of the feeder teeth (11) above the throat plate (10) is to be set within the extent of 0.8 – 1.2 mm according to the nature of the
sewn material. The setting thereof is to be done in loosening the screw (2) of the lifting lever (8) on the shaft (6) and in setting the
necessary height of the feeder teeth. Tighten firmly the screw. The evenness of the teeth can be set using the eccentric pin (5) in
loosening the screw (1) in the feeding lever (9) on the shaft (7) and, in turning a bit the pin (5) set the feeder at the level of the throat plate.
Tighten then the screw (1).
Check the height and the planeness of the feeder teeth using the locating fixture (12).
The figure 2 shows the method of using of the locating fixture for checking the planeness and height of the feeder teeth 0.8 mm above
the throat plate. The figure 3 shows the method of using of the locating fixture for checking the planeness and height of the feeder teeth
1.2 mm above the throat plate.
9
7
4
5
1
3
11
10 3
6
Fig. 1
8
2
12
Fig. 2 Fig. 3
4. Setting of the needle and feeder movement
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
In turning by hand the hand wheel, set the feeder into the position, where the feeding ends and where the feeder teeth are at the level of
the throat plate. Loosen two screws on the lower belt wheel and turn a bit the hand wheel until the needle point, when moving downward,
is set about 5 mm above the throat plate, and tighten the screws on the belt wheel.
5. Mounting of the throat plate (Fig. 1)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
The throat plate (10) must be correctly placed and tightened by the screws (3) in such a way, so that the needle passes through the centre
of the needle hole. The needle hole should not be damaged or abraded by the needle or thread, eventually otherwise damaged. Each
damage of this kind influences on the quality of sewing.
6. Setting of the elliptical path of the feeder (Fig. 1)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation, wait until the motor stops!
With a correctly set machine the feeder describes an elliptical path in both feeding directions. We proceed to the respective setting as
follows: The adjustable eccentric is set by means of a pin into the hole in the bottom shaft and determines the size of the feeding length.
The second (fixed) eccentric situated in front of the adjustable eccentric determines the correct ellipse. The fixed eccentric is secured with
two screws which are placed in its collar.
The eccentric is of a constant eccentricity, so that the height of the ellipse remains the same with different setting of the height of the
feeder teeth. With a zero eccentricity of the adjustable eccentric (i.e. with a zero feeding), we set the feeder holder with the feeder in the
centre of the slot in the throat plate with the loosened screws (4) of the lever (9) on the feeding shaft (7).
It is necessary to observe the principle that the maximum feeder lifting is about in the middle of the feeding path.
2
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