739-23 Sewing Machine for Small Parts Operating Instructions Installation Instructions Maintenance instructions Programming Instructions P.O.
Contents Page: Introduction and general safety instructions Part 1: Operating Instructions Class 739-23 1. 1.1 1.2 1.2.1 1.2.2 1.2.3 1.2.4 1.3 1.4 Product description . . . . . Proper use . . . . . . . . . . . Summary description . . . . . Introduction . . . . . . . . . . . Sewing machine head . . . . Material transport . . . . . . . Dürkopp-Adler Control (DAC) Technical data . . . . . . . . . Auxiliary equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Product description 1.1 Proper use The Dürkopp-Adler 739-23 sewing machine has been specifically designed for the processing of lightweight and medium weight materials. Such materials generally consist of textile fibres and is used in the clothing industry. The sewing machine can within certain limitations also be used for technical seams.
1.2.2 Sewing machine head – – – – – Single-needle double lockstitch machine The seam beginning and end are locked by means of tacks (single tacks, double tacks) or stitch condensation. Thread cutter An electronic thread monitor ensures that the machine is not restarted in the event of a thread break or if the bobbin is empty. Edge cutter 1.2.3 Material transport The material transport is driven by step motors.
Operating pressure: Air consumption: 6 bar 0.
2. Operation of the sewing machine head 2.1 Recommended threads The following core spun threads cater for high quality seams and interruption-free processing: Double polyester endless polyester spun (e.g. Epic Poly-Poly, Rasant x, Saba C, etc. ) double polyester endless cotton spun (e.g. Frikka, Koban, Rasant, etc.) If these products are not available, use the cotton and polyester threads listed in the table.
2.2 Replacement of needle 2 1 Caution: risk of injury! Switch off main switch. Never replace needle while the main switch is on. – – Loosen screw 1 and remove needle from the needle bar 2. Insert new needle to the stop in the hole in the needle bar 2. Caution! The needle scarf must face away from the operator and towards the hook. – Tighten screw 1.
1 12 2 8 3 7 4 9 5 10 6 11 1-10
2.3 Inserting of needle thread Caution: risk of injury! Switch off main switch. Never insert the needle thread while the main switch is on. To insert the needle thread, please proceed as shown in the above figures and in sequence of the numbers. – – – – – – – – – – Place yarn reel onto the yarn stand. Insert thread from the reel through hole 1 of the reeling bracket. Insert thread through guide 2. Insert thread through thread regulator 3.
1 1-12 Fig. A: Correct thread run at the centre of the sewing material Fig. B: Insufficient needle thread tension or excessive bobbin thread tension Fig.
2.5 Adjustment of needle thread tension Main tension The main tension 1 must be set to the lowest possible value. The looping of the threads must be positioned at the centre of the sewing material. In thin materials, excessive thread tensions can result in gathering or breaking threads. The main tension 1 must be adjusted in such a way that a regular stitch pattern is achieved. – To increase tension Turn knurled nut clockwise – To reduce tension Turn knurled nut anticlockwise 2.
2.7 Adjustment of needle thread regulator 3 2 1 Caution: risk of injury! Switch off main switch. Never adjust thread regulator while the main switch is on. The thread regulator 2 controls the length of thread that is necessary for a stitch. Good seams can only be achieved, if the thread regulator is adjusted to the correct value.
2.8 Winding of bobbin thread 1 5 4 3 2 The bobbin thread is automatically wound up during the sewing operation, provided that winder flap 2 is closed. – – – – – Remove all threads from the bobbin hub. Place yarn reel onto the yarn stand. Insert thread through hole 1. Insert thread through guide 4 and the bobbin thread tensioner 5. Wind thread in clockwise direction around the bobbin hub and cut off at hook 3. – Close bobbin flap 2. The winder is automatically switched on and ready for operation.
2.9 Replacement of bobbin 3 2 1 7 6 5 4 3 Caution: risk of injury! Switch off main switch. Always switch off main switch before you replace the bobbin. Removing bobbin – Switch off main switch – Press down cover plate 1. – Lift bobbin case flap 2. – Remove bobbin housing 3 together with bobbin. – Take bobbin 7 from the bobbin housing body 3. Inserting new bobbin – Place new bobbin in the bobbin case body. Observe direction of rotation of the bobbin.
2.10 Adjustment of bobbin thread tension 1 2 5 4 3 Caution: risk of injury! Switch off main switch. Never adjust bobbin thread tension while the main switch is on. The required bobbin thread tension must be generated by means of tension spring 5. The brake spring 1 must be fully reset. Adjustment of tension spring – With full bobbin, the bobbin case body 2 should slowly fall down due to its own weight (see figure to the right).
2.11 Inserting of needle and bobbin thread in thread scissors 2 1 To ensure that the sewing machine is able to continue sewing after the replacement of a reel or bobbin, the needle and bobbin thread must be inserted into thread scissors 2. – Pull needle and bobbin threads to the left. – Press key “1" at the operating panel. The thread scissors 2 are lifted for a short moment. – Pull needle and bobbin threads beneath the thread scissors. Both threads are cut and held by the blades.
3. Inserting of material in material clamps 2 1 5 4 3 Example: Inserting of a pocket flap – Place material clamp 1 onto holder 2. – Open material clamp – Place lining material 5 with the right side upwards into the material clamp. – Place outside fabric 4 with the right side downwards into the material clamp. Both pieces of material must touch the stop. At the edges, they must be aligned in such a manner that there is the same amount of excess material to the right as to the left.
4. Switching on of sewing machine and infeed of material clamps 4.1 Switching on of sewing machine 1 – Switch on main switch 1. The control system is initialised. The start message is displayed. Prior to working with the sewing machine, the sewing axes must be positined in the reference position. CAUTION! The reference run must be carried out by the operating staff. CAUTION! Risk of breakage! The material clamp may not be inserted during the reference run.
4.2 Infeed of material clamps 2 1 “ESC” “OK” Caution: risk of breakage! Do not insert material clamps that are not properly closed. – Place mateial clamp on guide rod 1 and press until it is engaged in the toothed profile 2. 4.3 Starting of sewing operation – Press key “S”. The sewing operation is started. The material clamp is pulled in. Insert additional material clamps for continuous processing. 4.4 Termination of sewing operation – – Press key “ESC”. The sewing operation is terminated.
5. Maintenance 5.1 Tilting of machine head 3 2 1 4 For maintenance work to be carried out below the base plate, the sewing machine head can be swiveled backwards and placed on the machine support. Caution! Risk of injury! Switch off main switch. – – – – Loosen clamping lever 3. Remove suction pipe 2. Swivel operating panel 1 forward. Tilt machine head 4 backwards. 5.2 Cleaning and inspection Caution! Risk of injury! Switch off main switch.
1 2 3 Maintenance tasks to be carried out 4 Description Operating hours Sewing machine head 8 - Remove dust, pieces of thread and cut-offs (e.g. with pressure air gun) Areas requiring special attention: - Area around the bobbin 1 - around the thread lever 2 - around the edge cutter 3 Control cabinet - Remove sewing dust (e.g.
6 4 8 2 10 5 4 aintenance tasks to be carried out Waste container Extractor system 8 7 Description Empty waste container 5. Empty dust bag 4. 6 Operating hours 8 Pneumatic system - Inspect water level at pressure regulator. - Clean filter cartridge 6. - Inspect system for leakage 1-24 The water level may not reach the filter cartridge 6. - Drain water (under pressure) from water separator 8 by turning the drain screw 7.
5.3 Lubrication 1 2 Caution! risk of injury! Lubricants may cause irritation to skin.Therefore avoid all contact with skin. If skin is contaminated, clean thoroughly with plenty of water. CAUTION! The handling and disposal of mineral oils is regulated by law. Oil must be disposed of through authorised dealers. Protect the environment and never spill any oil .
