669 Spezialnähmaschine Betriebsanleitung D Instruction manual GB 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: 12/2008 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 669 (Edition 12/2008) 1. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Designated Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Subclasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4. Optional Equipment . . . . . . . . . .
Contents Page: 7. 7.1 7.2 Sewing Sewing with machines using the FIR clutch positioning drive . . . . . . . . . . . . . . . . . . . . Sewing with machines using the Efka DC1550/DA321G positioning drive . . . . . . . . . . . . . 24 25 8. Tilting Back the Machine Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9. Folding Down the MG 56-2 Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 10. 10.1 10.
1. Product Description The DÜRKOPP ADLER 669 is a single-needle double lockstitch free-arm sewing machine featuring a lower feed, a needle feed and an alternating foot-upper feed. Depending on the subclass, it can also come with a thread trimmer, second stitch length and automatic bartacking. The maximum stitch length is either 6 mm or 9 mm, depending on the sewing equipment. The needle thickness is between 100 – 150 Nm. · · · · · · · · · 2. It is equipped with a large horizontal looper hook.
This sewing machine may be set up and operated only in dry, well-maintained premises. If the sewing machine is used in other 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 669-180010 669-180112 669-180312 The following additional equipment is available for the 669. 9780 000108 WE-8 maintenance unit for additional pneumatic equipment Pneumatic connection package. For connection of stand with maintenance unit.
Further available documents concerning the class 669: 0791 669801 Parts List 0791 669641 Service Instructions 5.
5.1 Technical data subclasses Type of stitch Lockstitch 301 Hook type horizontal, large Number of needles 1 Needle system 134-35 Needle thickness, max. (according to E no.) [Nm] Max. sewing thread thickness: Needle thread Bobbin thread [Nm] [Nm] Stitch length Forwards Reverse Max. stitch count Stitch count whendelivered 669-180312 669-180112 669-180010 Subclasses 150 80/3 - 15/3 80/3 - 20/3 GB [mm] 9 9 [min -1 ] [min -1 ] 3000 3000 3000 2800 3000 3000 Max.
6. Operation 6.1 Threading the needle thread 11 1 10 2 3 9 4 8 5 7 6 Caution: danger of injury ! Turn the main switch off ! The needle should be threaded only when the machine is turned off. Threading the needle thread – Put the reel on the reel stand. Guide the needle thread through the unwind holder. The unwind holder must be perpendicular to the reel. – Insert the thread through guide 1 and guide 2. – Pass the thread clockwise around the pre-tensioner 3.
6.2 Adjusting the needle thread tension 3 2 1 5 4 Pre-tensioner When the main thread tensioner 2 and the supplementary tensioner 3 are open, there must still be a slight tension remaining on the needle thread. This residual tension is created by the pre-tensioner 1. The pre-tensioner 1 influences both the length of the cut needle thread and the starter thread for the next seam. – Basic adjustment: Turn dial 4 until its front side is flush with the bolts 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 The influence of the sewing-foot lift on the main thread tensioner and supplementary thread tensioner, for subclass 669-180312 Button 1 (see Chapter 6.15) on the machine’s row of buttons can be used to activate or deactivate the supplementary thread tension at any time.
6.2.2 The influence of the stroke adjustment on the supplementary thread tensioner and the Speedomat, for subclass 669-180312 Button 1 (see Chapter 6.14) on the machine’s row of buttons can be used to activate or deactivate the supplementary thread tension at any time. The parameter F-255 must be set to “7" for this to work. Parameter setting. F-197 F-197 F-197 F-197 = = = = 0 1 2 3 Max.
6.3 Opening the needle thread tension Subclasses 669-180010 When raising the sewing feet by means of the knee lever, the main and supplementary tensioners are automatically opened. Subclasses 669-180112, 669-180312 The needle-thread tensioner is automatically opened when the thread is cut. 6.4 Turning the supplementary thread tension on and off for subclasses 669-180010 and 669-180112 2 1 The supplementary thread tension is turned on and off using the lever 1.
6.5 Adjusting the thread regulator 3 2 1 GB Caution: danger of injury ! Turn the main switch off. Set the thread regulator only with the sewing machine turned off. The thread regulator 1 is used to control the quantity of the needle thread required by the stitch formation. The best sewing results can only be ensured when using a precisely adjusted thread regulator. At the properly adjusted setting, the needle thread loop must be able to slide over the thickest section of the hook.
6.6 5 Winding the bobbin thread 4 3 2 – – – – – – – – 1 2 6 Put the reel on the reel stand. Guide the bobbin thread through the unwind holder. Pull the thread through guide 5, the tensioner 4, and the guide 3. Clamp the thread behind the blade 6 and tear off. Put the bobbin 1 on the bobbin winder. The thread does not need to be hand wound around the bobbin. Press the bobbin-winder lever 2 in the bobbin. Sewing The bobbin-winder lever ends the operation as soon as the bobbin is full.
6.7 Replacing the shuttle bobbin 1 3 2 Caution: danger of injury ! Turn the main switch off. Change the shuttle bobbin only when the sewing machine is switched off. 5 4 7 2 6 3 Taking off the empty bobbin – Raise the needle bar into its high position. – Pull out the hook cover 1 and fold down. – Lift up the bobbin enclosure hood 2. – Take out the upper part of the bobbin enclosure 3 with the bobbin 4. – Remove the empty bobbin from the upper part of the bobbin enclosure 3.
6.8 Pre-setting the hook thread tension 2 1 4 3 Caution: danger of injury ! Turn the main switch off. Only adjust the hook thread tension when the machine is turned off. Brake spring The brake spring 1 is responsible for preventing a bobbin overrun during a machine stop and when the hook thread is being cut. It cannot be adjusted! Setting the tension spring – Adjust the tension spring 4 with the adjustment screw 3. Turn until the required tension force is present.
6.9 Inserting and replacing the needle 1 2 3 2 1 Caution: danger of injury ! Turn the main switch off. Change the needle only when the sewing machine is switched off. – – – – – GB Turn the handwheel until the needle bar 1 has reached its highest position. Loosen screw 2. Pull the needle out from under the needle bar 1. Push in the new needle until it reaches the limit stop in the hole for the needle bar 1. Caution! The needle scarf 3 must be pointing towards the hook. Tighten screw 2.
6.10 Raising the sewing feet 1 2 Subclass 669-180010 The sewing feet can be lifted mechanically by pressing the knee lever 1. Subclasses 669-180112, 669-180312 The sewing feet can be lifted electro-pneumatically by pressing the pedal 2 or the knee lever 1. Raising the sewing feet mechanically (with the knee lever) – Push the knee lever 1 to the right in order to move the sewing material (for example, when making corrections).
6.11 Setting the sewing feet in the high position 1 1 – – 2 Swivel lever 1 downwards. Set the sewing feet in the high position. Swivel lever 1 upwards. The sewing feet are released. GB or – The sewing feet are raised pneumatically or with the knee lever. The lever 1 swivels back to its starting position. 6.12 Sewing-foot pressure The knob 2 is used to set the required sewing-foot pressure. CAUTION ! The sewing material should not “swim”. Do not set more pressure than necessary.
6.13 Sewing-foot stroke 2 1 3 The class 669 sewing machine comes (depending on the subclass) standard equipped with two dials for adjusting the sewing-foot stroke. Use the dial 2 on the left to select the standard sewing-foot stroke from 1 to 9. Use the dial 1 on the right to set a higher sewing-foot stroke from 1 to 9.
Operating mode for the rapid stroke adjustment The activation time for the maximum sewing-foot stroke depends on which operating mode is set. You can select between three different operating modes. The particular modes are specified on the operating panel by setting the parameters F-138 and F-184 (refer to the instructions from the motor manufacturer).
6.14 Adjusting the stitch length 4 3 2 1 The class 669 sewing machine is equipped with two dials, depending on the subclass. This allows two different stitches to be used when sewing. They can be selected using button 4 (see Chapter 6.15). The stitch lengths are set using the two dials 1 and 2 found on the machine arm. – Set the longer stitch length with the upper dial 1. Position 1 = min. stitch length Position 9 = max. stitch length – Set the shorter stitch length with the lower dial 2.
6.15 Key pad on the machine arm 8 7 6 Key 5 4 3 2 1 Function GB 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 2. Stitch length Button is back-lit: long stitch length (upper dial) is activated Button is not back-lit: small stitch length (lower dial) is activated 3 Invoke or suppress the start/final bartacks.
Key Function 8 LED display “Power On” The key 7 can be assigned a function using the screw 6 found under the switch. – Select a function. For example: 6 = sew backwards manually – Then press in the screw under key 5 and turn 90° to the right (the slot is then vertical). This function can now be activated using either key 5 or 7. CAUTION ! You must deactivate any previous assignment before assigning key 9 another function. 7. Sewing 7.
7.2 Sewing with machines using the Efka DC1550/DA321G positioning drive The DA321G control unit contains all required operational interfaces for switching functions and setting parameters. It is possible to operate without an operating panel, but the seam programming can no longer be carried out. The V810 and V820 operating panels can also be connected to the control unit. They are deliverable as accessories. Seam programming can be performed with the V820 operating panel.
3 Sewing process Before start of sewing Starting position 2 1 Operation / Explanation - 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 the middle of seam - Release pedal (return to rest position).
Sewing over transverse seams (maximum 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: - Briefly press the knee switch for activating the maximum sewing-foot stroke. - Briefly press the knee switch again for deactivating the maximum sewing-foot stroke. 2 nd set stitch length during sewing (max. stitch length) - Press the button 2. Raise the thread tension during sewing - Press the button 1.
8. Tilting Back the Machine Head 1 3 2 Caution – Risk of injury from crushing ! Do not reach between the base and the machine arm while you are tilting back the machine head. Tilting back the machine head – Press lever 1 upwards. The locking mechanism is then released. – Tilt the machine head 3 to the rear. The machine head 3 will be supported by the strap 2. Re-closing the machine head – Tilt the machine head 3 forwards. The head tilts back to the position shown in the illustration below.
9. Folding down the MG 56-2 stand 2 1 1 Caution: danger of injury ! Always hold the table plate with both hands when pulling out. GB 4 – – – – Loosen the table plate latch 1 located under the table plate. Pull out the table plate 2 to the left and fold out. Hook in the diagonal brace 4 to the bolts 3. Fold down the table plate. – Follow these steps in the opposite order to raise the table plate.
10. Maintenance 10.1 Cleaning and checking Caution: danger of injury ! Turn the main switch off. Maintenance work on the sewing machine must only be carried out when the machine is switched off. All maintenance work must be carried out before or at the maintenance intervals defined in the table (refer to the “operational hours” column). When working with materials that are thick and fibrous, shorter maintenance intervals may be required. A clean sewing machine helps to prevent malfunctions.
3 1 4 2 5 Maintenance required Explanation Operational Sewing drive Clean dust and residual thread from the air-entry points 8 You should be able to press down with your finger on the V-belt so that the belt moves about 10 mm down 160 The water level must not rise as far as filter insert 3. - After screwing in drain screw 5 blow out the water from the water separator 4 under pressure. 40 The filter insert 3 is used to filter out dirt and condensation.
10.2 Oil lubrication 1 Caution: danger of injury ! Oil can cause skin rashes. Avoid prolonged skin contact. If oil or grease contacts your skin, wash yourself thoroughly. CAUTION ! The handling and disposal of mineral oils is subject to legal constraints. Deliver used oil to an authorized reception point. Protect your environment. Take care not to spill any oil.
