Operation Manual

ManualsBrandsDurkopp Adler ManualsMiscellaneous743-221

Contents Page:

Preface and General Safety Information

Part 1: Operating Instructions Cl. 743-221

1. Product Description

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1.1 Proper Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Short Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2. Operating the Sewing Unit

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2.1 Tilting the Machine Head Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Turning On - Quick Stop - Restarting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3 Threading the Needle Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 Setting the Needle Thread Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5 Thread Monitor for the Needle Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.6 Setting the Thread Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.7 Winding the Underthread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.8 Changing the Bobbin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.8.1 Counter for the Control of the Underthread Reserve . . . . . . . . . . . . . . . . . . . . . . . . 12

2.9 Remaining Thread Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.10 Setting the Underthread Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.11 Changing the Needle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.12 Changing the Form Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.13 Work Area, Angle and Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.14 Setting the Insertion Depth of the Folding Table . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3. Setting the Controls

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4. Sewing

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5. Maintenance

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5.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.2 Oil Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

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Summary of content (24 pages)

PAGE 1
Contents Page: Home Preface and General Safety Information Part 1: Operating Instructions Cl. 743-221 1. 1.1 1.2 1.3 1.4 Product Description Proper Use . . . . . . Short Description . . . Technical Data . . . . Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1. Product Description 1.1 Proper Use The 743-221 is a sewing unit which can properly be used for the sewing of light to medium weight material. Such material is, as a rule, material made up of textile fibers or of leather. These materials are used in the garment, furniture and automobile upholstry industries. Further, it may also be possible to execute so-called technical seams with this sewing unit.
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1.2 Short Description The DÜRKOPP 743-221 is a sewing unit for the automated sewing single-point darts with straight or curved seam form and for the sewing of pleats. • • • • • • • • The unit is equipped with a machine head in lockstitch execution. A form set appropriate to the seam form holds and guides the material. The seam length control occurs, as desired, via a light barrier or through programming.
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1.4 Optional Equipment 0794 013222 Bundle clamp with slewing arm and holding pipe. 0794 000091 Placement table (small). (only in conjunction with the bundle clamp) 0794 000332 Smoother device for smoothing the blown-out sewing pieces. (only in conjunction with the bundle clamp) 0794 013333 Blower pipe from above or from the right. 0794 013444 Placement table (when using in-house bundle clamp carriages) 0797 003031 Compressed air connection hose, coupling plug, coupling socket and hose nozzle. 2.
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2.2 Turning On - Quick Stop - Restarting Caution Risk of Injury ! Do not reach into the area of moving machine parts. Turning on – Turn the main switch 2 on. The controls are initialized. The sewing unit requests a reference run. – Press the " Σ " key. The reference run is conducted. The sewing unit is operational. Turning off – Turn the main switch 2 off. The sewing unit is separated from the power supply. It is not operational.
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2.3 Threading the Needle Thread 1 2 3 Caution Risk of Injury ! Turn the main switch off. Thread the needle thread only with the sewing unit turned off. – Thread the needle thread as shown in the illustration. 2.4 Setting the Needle Thread Tension Pre-tensioning 1 If the sewing unit is on, than the maintension is open. For the save function of the needle thread monitor a residual tension of the needle thread is necessary. – Set pre-tensioning 1.
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2.5 Thread Monitor for the Needle Thread 1 b14 The switch b14 monitors the needle thread. Function – After a breaking of the needle thread the thread guide 1 drops down. The switch b14 remains unoperated. – The machine head positions in position 2 (needle up). The display of the control unit shows the symbol "-x-" (needle thread break). Caution Risk of Injury ! Before threading the needle thread turn the main switch off. Renewed starting is only possible after turning the main switch off and on again.
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2.6 Setting the Thread Regulator 2 1 2 3 4 5 The needle thread quantity required for stitch formation is regulated with the thread regulator 2. Only a precisely set thread regulator guarantees an optimal sewing result. The setting of the thread regulator is dependent on the following factors: – Stitch length – Material thickness – Characteristics of the sewing yarn used With a correct setting, the needle thread loop 6 should glide over the hook without excess and with a little tension.
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2.7 Winding the Underthread 1 2 3 4 Caution Risk of Injury ! Turn the main switch off. Thread the underthread for winding only with the sewing unit turned off. – – – – – – – – – – 10 For a secure functioning of the remaining thread monitor remove thread residue from the bobbin hub before winding. Thread the underthread as shown in the illustrations. Wind the underthread clockwise in the reserve groove 6 of the bobbin hub. Place the bobbin on the bobbin winder shaft 2.
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2.8 Changing the Bobbin 3 5 1 4 6 7 2 Caution Risk of Injury ! Turn the main switch off. Change the underthread bobbin only with the sewing unit turned off. Removing the empty bobbin – Lift bobbin case flap 1. – Take out the bobbin case top 7 with bobbin. – Remove empty bobbin from the bobbin case top 7. Inserting a full bobbin – Insert the full bobbin in the bobbin case top 7. – Pull the underthread through slit 6 under the tension spring 3 until in the drilled hole 4.
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2.8.1 Counter for Control of the Underthread Reserve The decrementer, which can be preset in program P41, monitors the underthread reserve. It is decreased by the value 1 after every 10 stitches. The height of the initial value to be selected depends – on the thickness of the underthread used – on the amount of thread wound onto the bobbin. Example: With an 100/2 underthread 18 000 stitches can be sewn with one bobbin filling.
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2.9 Remaining Thread Monitor 2 3 1 The remaining thread monitor monitors the thread reserve on the the underthread bobbin with the infrared reflecting light barrier 1. Function – After a certain number of seams the underthread reserve on the bobbin is used up. – The light beam transmitted from light barrier 1 is reflected by the exposed reflecting surface 2 on the bobbin hub. – The display of the controls shows the message " Bobbin Empty ".
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2.10 Setting the Underthread Tension 3 1 2 The necessary underthread tension should be created by the tension spring 1. Caution Risk of Injury ! Turn the main switch off. Set the brake spring 1 and the tension spring 3 only with the sewing unit turned off. – – 14 Place the bobbin in bobbin case top 1 and thread the underthread. Set the tension spring 1 at adjusting screw 2. The underthread tension should be 20 - 30g.
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2.11 Changing the Needle 2 1 3 Caution Risk of Injury ! Turn the main switch off. Change the needle only with the sewing unit turned off. – – – Loosen screw 1 and remove the needle. Push the new needle into the drilled hole of the needle bar 2 up to the stop. Attention! Viewed from the operator side of the sewing unit the furrow 3 of the needle must show to the right, that is, to the hook point (see sketch). Tighten screw 1.
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2.12 Changing the Form Set 1 2 3 4 A form set corresponding to the desired seam form must be inserted. Form set 0793 078001 = Straight seam Form set 0793 078002 = Curved seam Form set 0793 078034 = Curved seam for pleats Form set 0793 078xxx = Customer-specific version Caution Risk of Injury ! Turn the main switch off. The form set may only be changed with the sewing unit turned off. Taking the form set out – Turn the handwheel until the needle lies in the 2nd position (OT).
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Work Area for Darts Angle adjustment area dart length Area of shapes Example for form set 0793 078001 1 Dart depth max. 2.1 cm at 10°, length 9.5 cm 2 Dart depth max. 0.4 cm at 0°, length 8.5 cm 3 Form set 0793 078001 4 Form set 0793 078002 Work Area for Pleats Angle adjustment area Parallel adjustment area Area of shapes Example for form set 0793 078034 1 Pleat depth max. 3.2 cm at 5°, length 5 cm 2 Pleat depth max. 2.
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2.13 Work Area, Angle and Length The dart depth is dependent on: – the form set used – the dart length – the setting of the folding table The folding table is continuously adjustable between 0 - 10°. The dart depths for other angles and lengths can be found in the diagrams. The curve for the form set 0793 078002 is also listed. 1 2 Caution Risk of Injury ! Turn the main switch off. The angle may only be set with the sewing unit turned off.
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2.14 Setting the Insertion Depth of the Folding Table The first stitch of the needle into the material should occur as close as possible to the front edge. In order to achieve a uniformly slim dart point with differing material thicknesses, the machine is equipped with a fine adjustment. 7 different insertion depths can be set with the stops 4. 3 1 4 2 Caution Risk of Injury ! Turn the main switch off. The insertion depth may only be set or changed with the sewing unit turned off.
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3. Setting the Controls The setting of the controls is explained in detail in Part 4: Short Description Microcontrol ! Here only those settings required for the sewing sequence are listed. Caution Risk of Injury ! Turn the main switch on ! The programming of the controls occurs with the main switch turned on! The machine should not be started unintentionally. – Set the " Program " switch to 10 to 29. The sewing program is selected.
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– Activating the Softstart. Press the key. The LED is lit when the function is selected. – Preselecting end securing at the seam beginning. Press the key. LED on: LED off: – Preselecting end securing on the seam end. Press the key. LED on: LED off: – End securing through stitch condensation End securing through seam tacking End securing through stitch condensation End securing through seam tacking Activating end securing at the seam beginning or at the seam end. Press the key.
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4. Sewing 1 After the main switch is turned on or the " STOP " key is pressed, the microcomputer checks the base setting of the sewing unit. Caution Risk of Injury ! Turn the main switch off ! Mark the dart length only with the sewing unit turned off. – Mark the dart length with smooth and thinnest possible tape on the folding plate 1. – – – Turn the main switch on. Set the " Program " switch. Press the " STOP " key. The selected program is active. Press the " Σ " key. The reference run is conducted.
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5. Maintenance of the Sewing Unit Caution Risk of Injury ! Turn the main switch off. The maintenance of the sewing unit may only be conducted when it is turned off. 5.1 Cleaning A clean machine protects against malfunctions ! Daily cleaning: – Remove all lint accumulations. – Clean the light barrier with a soft cloth. – Check the water level in the pressure regulator. The water level should not climb to the filter insert. After screwing in the drain screw 1 blow off the water under pressure.
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5.2 Oil Lubrication 1 2 For lubrication of the special sewing machine, use only ESSO SP-NK 10 lubricating oil or an equivalent oil with the following specification: – Viscosity at 40 °C: 10 mm2/s – Flash point: 150 °C ESSO SP-NK 10 lubricating oil can be obtained from the DÜRKOPP ADLER AG sales offices: 2 liter container 0570 001699 5 liter container 0990 470058 Caution Risk of Injury ! Oil can cause skin rashes. Avoid longer skin contact. Wash yourself thoroughly after contact.