869 Spezialnähmaschine Betriebsanleitung Instruction manual Postfach 17 03 51, D-33703 Bielefeld • Potsdamer Straße 190, D-33719 Bielefeld Telefon +49 (0) 521 / 9 25-00 • Telefax +49 (0) 521 / 9 25 24 35 • www.duerkopp-adler.com Ausgabe / Edition: 03/2009 Änderungsindex Rev. index: 00.0 Printed in Federal Republic of Germany Teile-Nr./Part.-No.
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Foreword This instruction manual is intended to help the user to become familiar with the machine and take advantage of its application possibilities in accordance with the recommendations. The instruction manual contains important information on how to operate the machine securely, properly and economically. Observation of the instructions eliminates danger, reduces costs for repair and down-times, and increases the reliability and life of the machine.
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 in full knowledge 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.
Contents Page: Preface and General Safety Instructions Part 1: Operating Instructions Class 869 (Edition 03/2009) 1. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Designated Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Subclasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4. Optional Equipment . . . . . . . . . .
Contents Page: 8. Tilting Back the Machine Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 9. Folding Down the Table Top with the MG 56-2 Stand . . . . . . . . . . . . . . . . . . . . . . . 32 10. 10.1 10.2 Maintenance Cleaning and Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Product Description The DÜRKOPP ADLER 869 is a single-needle double lockstitch free-arm sewing machine with a lower feed, a needle feed and an alternating foot-upper feed. Depending on the subclass it comes as single or double needle machine, with or without electropneumatic driven thread trimmer. · · · · · · · The machines are equipped with a large horizontal hook. With a maximum of 20 mm fabric clearance when sewing feet are lifted. The residual thread length after thread trimming is about 15 mm.
This special sewing machine may be set up and operated only in dry, well-maintained premises. If the sewing machine is used in premises which are not dry and well-maintained it may be necessary to take further precautions which should be agreed in advance (see EN 60204-31:1999).
4. Optional Equipment Order No. Optional equipment 869-180020 869-180122 869-180322 869-280020 869-280122 869-180322 The following optional equipment is available for the 869. Subclasses 9780 000108 WE-8 maintenance unit for pneumatic optional equipment x x x x x x 0797 003031 Pneumatic connection package For connection of stand with maintenance unit.
Further available documents concerning the class 869: 0791 869801 Parts List 0791 869641 Service Instructions 5.
5.1 Technical data subclasses Type of stitch 869-180322 869-280122 869-280020 869-180322 869-180122 869-180020 Subclass Lockstitch 301 Hook type vertical, large Number of needles 1 2 Needle system 134-35 Needle size max. (depending on E-No.) [Nm] 180 Max. thread thickness Needle thread Hook thread [Nm] [Nm] 80/3 - 10/3 100/3 - 10/3 Stitch length Forwards Reverse GB [mm] 9 9 Max. speed [min -1 ] 2800 Speed factory setting [min -1 ] 2800 Max.
Threading scheme single-needle machine 11 1 2 10 3 9 4 8 5 7 6 Threading scheme double-needle machine 12 22 13 14 21 20 19 18 17 10 15 16
6. Operation 6.1 Threading the needle thread Caution: Risk of injury! Turn off the main switch! The needle thread may only be threaded with the sewing machine switched off. Threading in the needle thread with single-needle machines – Put the thread reel on the thread stand and lead the needle thread through the unwinder arm. The unwinder arm must be in vertical position above the thread reels. – Thread in the thread through threading guide 1 and 2.
6.2 Adjusting the needle-thread tension 3 2 1 5 4 Pre-tension When the main tensioner 2 and supplementary tensioner 3 are open, the needle thread must be under slight residual tension. This residual tension is produced by the pre-tensioner 1. The pre-tensioner 1 simultaneously affects the length of the end of the severed needle thread (the starting thread for the next seam). – Basic setting: Turn knurled nut 4 until its front is flush with the bolt 5.
6.2.1 Fig. A Correct thread interlacing in the center of the material Fig. B Needle-thread tension too weak or Hook-thread tension too strong Fig. C Needle-thread tension too strong or Hook-thread tension too weak Function of the main thread tension and the supplementary thread tension in relation to the sewing foot lifting for subclass 869- ... The thread supplementary tension can, at any time, be switched on or off by actuating key 1 (see chapter 6.15) of the key pad.
6.2.2 Function of supplementary thread tension in relation to the sewing foot lifting and the Speedomat for subclass 869- ... The thread supplementary tension can, at any time, be switched on or off by actuating key 1 (see chapter 6.14) of the key pad. The parameter F-255 must be set on “7" for this to work. Parameter Setting F-197 F-197 F-197 F-197 = = = = 0 1 2 3 Stroke adjustment max.
6.4 Turning the supplementary thread tension on and off for subclasses 869-180020, 869-280020, 869-180122 and 869-280122 2 1 GB The supplementary tension is being switched on and off with lever 1. Switching on – Push the handle 2 of lever 1 to the left. Switching off – Push the handle 2 of lever 1 to the right.
6.5 Adjusting the thread regulator 3 2 1 Caution: Risk of injury! Turn off the main switch. The thread regulator may only be adjusted with the sewing machine switched off. The thread regulator 1 controls the quantity of needle thread required for stitch formation. The thread regulator must be precisely adjusted for an optimum result. At the correct setting the needle thread loop must be able slide with low tension over the thickest point of the hook. – Loosen the screw 2.
6.6 Winding on the hook thread 5 4 3 2 – – – – – – – – 1 2 6 Put the thread reel on the thread stand and lead the needle thread through the unwinder arm. Pull the thread through the thread guide 3, the tensioner 5 and the thread guide 3. Clamp the thread behind the blade 6 and tear it off. Fit the bobbin 1 on the bobbin winder. There is no need to wind the thread around the bobbin by hand. Press the bobbin-winder lever 2 into the bobbin. Sewing.
6.7 Changing the hook-thread bobbin 1 2 Caution: Risk of injury! Turn off the main switch. The hook-thread bobbin may only be changed with the machine switched off. Remove the empty bobbin – Slide the cover 1 sideways, raise up the flap 7 and remove the empty bobbin 2. 6 7 2 3 5 4 Insert a full bobbin – Insert the bobbin 2 so that it moves in the opposite direction of the hook when unwinding. – Pass the hook thread through the slit 3 and underneath the spring 4.
6.8 Setting the hook thread tension 1 Caution: Risk of injury! Turn the main switch off! The hook thread tension may only be adjusted with the sewing machine switched off. GB Setting the tension spring 2 – Set the tension spring 2 by turning the adjustment screw 1. Increase the hook thread tension = Turn screw 1 clockwise Decrease the hook thread tension = Turn screw 1 counter-clockwise.
6.9 Inserting and changing the needle with single-needle machines 1 2 3 1 Caution: Risk of injury! Turn off the main switch. The needle may only be changed with the sewing machine switched off. – – – – – Turn the hand wheel, until the needle bar 1 has reached its highest position. Loosen the screw 2. Pull the needle downwards out of the needle bar 1. Push in the new needle into the hole of the needle bar 1 until it stops. ATTENTION! The needle scarf 3 must point towards the hook. Fasten the screw 2.
6.10 Inserting and changing the needle with double-needle machines 1 2 3 4 2 1 Caution: Risk of injury! Turn the main switch off! The needle may only be changed with the sewing machine switched off. – – – – – GB Turn the hand wheel, until the needle bar 1 has reached its highest position. Loosen the screw 3. Pull the needle downwards out of the needle holder 2. Push in the new needle into the hole of the needle holder 2 until it stops.
6.11 Lifting the sewing foot 1 2 Subclass 869-180020, 869-280020 The sewing feet can be lifted mechanically by actuating the knee lever 1. Subclasses 869-180112, 869-180322, 869-280122, 869-280322 The sewing feet can be lifted electro-pneumatically by actuating the pedale 2 or the knee lever 1. Mechanical sewing foot lifting (Knee lever) – To adjust the position of the material (e.g. for corrective purposes), push the knee lever 1 (optional) to the right.
6.12 Locking the sewing feet in lifted position 1 1 – – 2 Push the lever 1 downwards. The sewing feet are locked in lifted position. Push the lever 1 upwards. The sewing feet are released. GB or – Lift the sewing feet pneumatically or by pushing the knee lever. The lever 1 then moves back into its initial position. 6.13 Sewing foot pressure The required sewing-foot pressure is set with the setting wheel 2. ATTENTION! The material must not “swim”. Do not set a higher pressure than is necessary.
6.14 Sewing-foot stroke 2 1 3 The special sewing machine 869 has, depending on the subclass, as standard equipment two setting wheels for the sewing foot stroke. With the left setting wheel 2 the standard sewing foot stroke from 1 to 9 mm is selected. With the right setting wheel 1 an increased sewing foot stroke from 1 to 9 mm is selected.
Operation mode of the quick stroke adjustment The activation period of the maximum sewing foot stroke depends on the set operation mode. It is possible to choose between three operation modes. The individual operation modes are determined by the setting of the parameters F-138 and F-184 at the control panel (see enclosed instructions of the motor manufacturer).
6.15 Setting the stitch length 4 3 2 1 The special sewing machine 869 has, depending on the subclass, as standard equipment two setting wheels. Thus, two different stitch lengths can be sewn, that are activated by actuating the key 4 (see chapter 6.15). The two stitch lengths are set with the setting wheels 1 and 2 on the machine arm. – Set the higher stitch length with the upper setting wheel 1. Setting 1 = min. stitch length Setting 9 = max.
6.16 Key pad on the machine arm 8 7 6 Key 5 4 3 2 1 Function 1 Supplementary tread tension Button is back-lit: the supplementary thread tension is activated. Button is not back-lit: the supplementary thread tension is not activated. 2 2nd stitch length Button is back-lit: long stitch length (upper setting wheel) is activated Button is not back-lit: small stitch length (lower setting wheel) is activated 3 Recalling or suppressing the initial or final bartack.
Key 8 Function LED display “Power On” The function of key 7 can be selected with the screw 6 under the keys. – Selecting a function. Example: 6 = Manually sewing backward. – Turn in the screw 6 under the key 5 and turn it 90° to the right (the slot stands vertically). The function can now be called via both keys 5 and 7. ATTENTION! Before key 7 can be programmed with a new function, the former setting must be deactivated. 7. Sewing 7.
7.2 Sewing with machines using the Efka DC1550/DA321G positioning drive The control unit DA321G contains all required operational interfaces for switching functions and setting parameters. It is possible to operate without an operating panel, but the seam programming cannot be carried out. The V810 and V820 operating panels can also be connected to the control unit. They are deliverable as optional equipment.Seam programming can be performed with the V820 operating panel.
3 Sewing process 2 1 4 Operation / Explanation Prior to sewing Starting position - Pedal is in the resting position. The sewing machine is at rest. The needle is up. The sewing feet are down. Position material at seam start - Move pedal back halfway. Raise the sewing feet. - Push the material to the needle. Sewing - Step the pedal forward and hold. The machine then continues to sew with the speed determined by the pedal. In mid-seam Interrupt the sewing process - Release pedal (rest position).
Sewing over a cross seam. (max. sewing foot stroke) The maximum sewing-foot stroke is activated. The speed is limited to 1600 min-1. Operating modes for maximum sewing-foot stroke: - Press the knee switch briefly for activating the maximum sewing-foot stroke. - Press the knee switch briefly again for deactivating the maximum sewing-foot stroke. Sewing the 2 nd stitch length during sewing (max. stitch length) - Actuate key 2. Increase the thread tension during the sewing process - Actuate key 1.
8. Tilting Back the Machine Head 1 2 Caution Crushing Hazard! Do not reach between the base and the machine arm while tilting back the machine head. Tilting back the machine head – Pull lever 1 upwards. The locking mechanism is then released. – Tilt the machine head 2 cautiously to the rear. Re-closing the machine head – Tilt the machine head 2 forwards. The head tilts back to the position shown in the illustration below. – Pull lever 1 upwards and cautiously tilt the head downwards.
9. Folding Down the Table Top with the MG 56-2 Stand 2 1 Caution: Risk of injury! Always hold the table top with both hands when pulling it out. 4 – – – – Loosen the table top latch 1 located under the table top. Pull out the table top 2 to the left and fold out. Hook in the diagonal brace 4 to the bolts 3. Fold down the table top – Follow these steps in the opposite order to raise the table top.
10. Maintenance 10.1 Cleaning and Checking Caution: Risk of injury! Turn the main switch off! Maintenance may only be carried out with the machine switched off! Maintenance work must be carried out no less frequently than at the intervals given in the tables (see “operating hours” column). Maintenance intervals may need to be shorter when processing heavy-shedding materials. A clean machine is a trouble-free machine.
3 1 4 2 Maintenance work to be carried out 5 Explanation Operating hours Clean fan grille 2. (e.g. with an air blow gun) Remove lint and pieces of thread from air-intake openings. 8 Check condition and tension of V-belt 1 It must be possible to depress the V-belt by about 10 mm by pressing it with a finger at its mid-point. 160 Check water level in pressure regulator. The water level must not rise to the level of the filter cartridge 3.
10.2 Oil Lubrication 1 Caution: Risk of injury! Oil can cause skin eruptions. Avoid protracted contact with the skin. In the event of contact, thoroughly wash the affected area. ATTENTION! The handling and disposal of mineral oils is subject to legal regulation. Deliver used oil to an authorised collection point. Protect your environment. Take care not to spill oil.
