DURKOPP ADLER Lp 2971 Instruction Manual
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DURKOPP ADLER Lp 2971 Instruction Manual

DURKOPP ADLER Lp 2971 Instruction Manual

Industrial sewing machine
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Postfach 17 03 51, D-33703 Bielefeld • Potsdamer Straße 190, D-33719 Bielefeld
Telefon +49 (0) 521 / 9 25-00
Ausgabe / Edition:
Änderungsindex
06/2012
Rev. index: 00.0
Industrial sewing machine
•
Telefax +49 (0) 521 / 9 25 24 35 • www.duerkopp-adler.com
Printed in Czech Republic
LP 2971
LP 2974

Instruction manual

Teile-Nr./Part.-No.:
0791 888761
CZ

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Summary of Contents for DURKOPP ADLER Lp 2971

  • Page 1: Instruction Manual

    LP 2971 LP 2974 Industrial sewing machine 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: Änderungsindex...
  • Page 2 All rights reserved. Property of Dürkopp Adler AG and copyrighted. Reproduction or publication of the content in any manner, even in extracts, without prior written permission of Dürkopp Adler AG, is prohibited. Copyright © Dürkopp Adler AG - 2012...
  • Page 3 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.

  • Page 4: General Safety Instructions

    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.

  • Page 5: Table Of Contents

    Contents Page: Introduction and safety instructions Part 1: Operating Instructions LP 2971, LP 2974 – Original Instructions (Edition 06/2012) Product description ......... . .
  • Page 6 Notes:...

  • Page 7: Product Description

    Product description The Dürkopp Adler LP 2971, LP 2974 is a special sewing machine for universal use. • It is a double lockstitch post bed sewing machine . • It has a two step feed. A lower wheel feeder and a driven roller presser feed in two steps, a needle feed feeds in the first step only.

  • Page 8: Subclasses

    Subclasses LP 2971 Single-needle double lockstitch post bed sewing machine with feed wheel, needle feed with driven roller foot and large hook, electro-magnetic thread cutter, electro-magnetic seam bartacking and sewing foot lifting. LP 2974 Double-needle double lockstitch post bed sewing...

  • Page 9: Optional Equipment

    Optional equipment The following optional equipments are available for the class LP 2971, LP 2974 : Order No. Optional equipment Subclasses 9880 888101 Integrated sewing light with 2 LED, incl. dimmer transformer 9880 888100 Diode sewing light 3W 0888 320254...
  • Page 10 Technical data of the subclasses Subclasses Type of stitch Lock stitch 301 Hook type Number of needles Needle system Needle size (depending on E-No.) [Nm] Max. thread thickness [Nm] 10/3 Stitch length [mm] Forwards 7 (5 for E55/2.0 and E56/2.4) Backwards 7 (5 for E55/2.0 and E56/2.4) Max.

  • Page 11: Operation Gb

    Operation 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. – Thread the single needle machine according to fig. (A). – Thread the double needle machine according to fig. (B). The thread (1) designed for the left needle is to be threaded in the left tensioners and in the upper hole in the thread lever (3).

  • Page 12: Winding The Hook Thread

    Winding the hook thread – Thread the thread according to the picture. – Insert the thread under the knife (1) and tear off by pulling in the arrow direction (2). – Fix the bobbin and press the lever (3) in the direction (4). –...

  • Page 13: Adjusting The Thread Tension

    Adjusting the thread tension 6.4.1 Adjusting the hook thread tension Caution! Risk of injury! Turn off the main switch. The hook thread tension may only be adjusted with the machine switched off. – Adjust the hook thread tension via the screw (1). Insert a screwdriver through the hole (2).

  • Page 14: Adjusting The Needle Thread Tension

    6.4.2 Adjusting the needle thread tension Adjusting the pre-tensioner (1) – When the main tensioner (3) and supplementary tensioner (2) 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.

  • Page 15: Switching On/Off The Thread Tensioners

    Switching on/off the thread tensioners – Tensioner (1) is never switched off. – Tensioners (2) and (3) are switched off with an electric magnet at the foot automatic lifting. If the automatic foot lifting at the machine stop is pre-selected, the tensioners are switched off, but temporarily only, so that the switching off electric magnet does not overheat.

  • Page 16: Adjusting The Thread Regulator

    Adjusting the thread regulator The thread regulator (2) controls the quantity of needle thread required for stitch formation. The thread regulator must be precisely adjusted for an optimum result. – Loosen the screw (1), shift the thread regulator (2), and tighten the screw (1).

  • Page 17: Changing The Needle With Single-Needle Machines With The Hook On The Right

    Changing the needle with single-needle machines with the hook on the right Caution! Risk of injury! Replace the needle with the main switch switched off and the motor stopped. – Turn the hand wheel, until the needle bar (1) has reached its highest position.

  • Page 18: Changing The Needle With Double-Needle Machines

    Changing the needle with double-needle machines Caution! Risk of injury! Turn off the main switch. The needles may only be changed with the sewing machine switched off. – Loosen the screws (1). – Remove the needle and insert new ones with the needle scarf (2) oriented as shown above [see section (3) or (4)].

  • Page 19: Lifting And Folding The Roller Presser

    Lifting and folding the roller presser Lifting the roller presser with a hand lever – Lift the roller presser by the lever turning (1) in the arrow direction to the stop (the roller presser remains lifted, the lever (1) remains tilted).

  • Page 20: 6.10 Sewing-Foot Pressure Through The Setting Wheel

    Roller presser folding Caution! Risk of injury! Roller presser folding to be done at main switch off and standing motor. – Lift the roller presser with the hand lever. – Lift the roller presser by pressing in the signed direction. 6.10 Sewing-foot pressure through the setting wheel –...

  • Page 21: Sewing Backward (Feeding Backward; Backtacking)

    6.11 Sewing backward (backtacking) Backtacking with the lever – Push the stitch regulator lever (1) downwards. The machine sews backward stitches as long as the stitch regulator lever (1) is being pushed. Automatic backtacking (bartacking) – In the machines equipped with the positioning motor it is possible to pre-select the backtacking by a pre-selected backstitches number both at the beginning and at the seam end.

  • Page 22: 6.13 Switching On The Safety Clutch At The Hook Blocking

    6.13 Switching on the safety clutch at the hook blocking – If the thread gets in the hook way, the hook gets blocked and it is subsequently disconnected from the motor by the safety clutch. Caution! Risk of injury! Turn off the main switch. Switch the safety clutch on, with the sewing machine switched off.

  • Page 23: 6.14.1 Using The Pedal

    6.14 Controlling the machine equipped with a positioning motor 6.14.1 Using the pedal The pedal position is scanned by a sensor distinguishing 16 levels. The meaning is given in the table: Pedal position Pedal motion Meaning Over heel fully backwards Command for thread trimming (seam finishing) Over heel slightly backwards Command for foot lifting...

  • Page 24: 6.14.2 Using The Key

    6.14.2 Using the key Function Manual sewing backward The machine sews backward stitches as long as the key is being pushed. Needle positioning to the upper or lower position By parameter F-242 (DA321) the following key functions can be defined: 1 = needle up/down 2 = needle up 3 = one stitch...

  • Page 25: Positioning Drive Efka Dc1550/Da321G

    Positioning drive Efka DC1550/DA321G DA321G control contains all necessary operating elements to switch the functions over and to set the parameters. The operation is possible without the control panel, it is not possible only to program the sewing. It is possible to connect the control panel V810 and V820, which are available as an attachment.

  • Page 26: Machine Automatic Function

    Sewing with machine with positioning motor Machine automatic functions The machine has the below functions which are automatically performed during the seam sewing depending on: – Pre-selection – Pedal position (according to the machine operator´ s selection) – Working phase of seam sewing Automatic function Pre-selection Needle positioning...

  • Page 27: Example Of Machine Operation At Sewing

    Automatic function codes are described in the attached drive manufacturer´ s Instruction Leaflet. The drive manufacturer’s Instruction Leaflet for Efka DA321G drive is available on website www.efka.net. Some automatic functions can be preset by means of push buttons. Their description is included in the booklet “Efka Operation Instructions”.

  • Page 28: Maintenance

    Maintenance Cleaning and checking Caution! Risk of injury! Turn off the main switch. 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.
  • Page 29 Maintenance work Explanation Operating to be carried out hours - Clean the oil sump Clean the oil sump (1) of dirt and contaminated oil. (you may use a special vacuum cleaner.) - Clean fan grille Remove lint and pieces of thread from air-intake openings (2) (e.g.

  • Page 30: Lubrication

    Lubrication 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. Caution! The handling and disposal of mineral oils is subject to legal regulation. Deliver used oil to an authorised collection point. Protect your environment.
  • Page 31 6.1.3 Values of parameters specific for LP 2971, LP 2974 ......Setting of machine positioning ........
  • Page 32 Notes:...

  • Page 33: Scope Of Delivery

    Scope of delivery The purchaser can order a complete machine, or some components only. Prior to setting up, please check that all the required parts are present. This description refers to a special sewing machine, of which all individual components can completely be delivered by Dürkopp Adler AG.

  • Page 34: Transport Packing Of Assembled Machine

    Transport packing of assembled machine If the machine is supplied in assembled condition, the following transport packing must be removed: – Safety straps and wooden battens on the machine head and stand. – Safety blocks and straps on the sewing drive. Assembling the stand Assembling the stand components –...

  • Page 35: Assembling The Table Top (Direct Drive)

    Assembling the table top (direct drive) – Turn the table top (1) upside down. – Screw the electric cable channel (2). – Screw the pedal position sensor (3). – Screw the electric cable clip (4). – Put the oil sump on (5) and slide it in the arrow direction (6) till the relevant protrusions of the oil sump are seated on the recess contour.

  • Page 36: Setting The Working Height

    Setting the working height – The stand height is adjustable between 750 and 900 mm. – Loosen the screws (1). – Set the required table top height and make sure that it is identical on both sides. To do that, use the scale on the stand feet. Set the stand height so that it corresponds with the operator’s body proportions.

  • Page 37: Assembling The Machine Head

    Assembling the machine head Fitting the machine head – Tilt the machine head (1) and insert it in the table top recess. – After the head insertion, screw the locking plate (2) immediately to secure the machine head against falling out at its tilting. The locking plate is part of the machine head accessories.

  • Page 38: Fitting The Belt Guards

    Fitting the belt guards – Disassembly the hand wheel (1). – In the machines with the motor on the sewing head and with 1,55:1 toothed belt driving gear, mount the proximity switch (3). It is included in the “kit for motor“. –...

  • Page 39: Adjustment Of Pedal Position

    Adjustment of pedal position – Adjust the side position of the pedal (1) so that its center lies on the needle axis. – Adjust the draw rod (2) so that the foot axis is perpendicular to the pedal surface. Caution! Risk of injury! Failure to keep the determined pedal position can cause damage to the operator’s locomotion system.

  • Page 40: Fitting The Oil Pump Pipe

    Fitting the oil pump pipe – Tilt the machine head (1). – Attach the pipe (2) with the clips (3) and install the suction basket (4). – TIlt the machine head.

  • Page 41: Fitting The Connecting Cable, Control Panel And Sewing Diode Lamp On The Machine Head

    Fitting the connecting cable, control panel and sewing diode lamp on the machine head – The connecting cable (1) is supplied with every machine with the positioning motor (drive). – The control panel (2) had to be ordered separately (optional equipment).

  • Page 42: Electrical Connection

    Electrical connection The machine drive is supplied from the low voltage network. Caution! All work on the electrical equipment of this special sewing machine may only be carried out by qualified electricians or other appropriately trained persons. Remove the mains plug before carrying out any work! Electrical connection to low voltage network According to the selected type the machine drive has a one-phase or three-phase supply.
  • Page 43 5.1.1 Sewing lamp transformer connection to network voltage Caution! Risk of electric current injury! The sewing lamp transformer is not switched off by the main switch (EN 60 204-31)! At the sewing lamp installation and repair inside the transformer box, e.g. at a fuse replacement, the mains plug must be disconnected from the power outlet.

  • Page 44: Grounding

    Grounding – The grounding conductor (1) is included in the accessory package of the machine head. – Connect the conductor (1) to the plug (2) and pull its opposite end under the table top. – Screw the opposite end of the grounding conductor to the relevant grounding point of the drive (indicated –...

  • Page 45: Connection Of Head To Efka Dc1550/Da321G Drive

    Connection of the head to Efka DC1550/DA321G drive Efka DC1550/DA321G direct drive is fixed directly on the machine head. The motor synchronizer is incorporated in the motor body and it is not located on the hand wheel (this applies, however, only for the 1:1 gear reduction motor –...

  • Page 46: Adjustment Of Efka Positioning Motor (Drive)

    6.1.2 Setting of Efka drive parameters specific for LP 2971, LP 2974 Caution! Change of the parameter value must be performed with consideration and in a responsible way. A false setting of the control may cause the...

  • Page 47: Values Of Parameters Specific For Lp 2971, Lp 2974

    6.1.3 Values of parameters specific for LP 2971, LP 2974 Parameter change for machines with gear rate of 28/28 teeth Parameter Original value New value Parameter description 290* Class of the machine Max. sewing speed Reference position (see chapter 6.2.2)

  • Page 48: Checking Of Set Positions

    6.2.3 Checking of set positions Position 1 – Switch on the network switch. – Tread the pedal forwards shortly and release. The machine is stopped in the position 1 (see chapter 6.2.1). – Check the angle on the hand wheel scale (225° ± 5°). Position 2 –...

  • Page 49: Lubrication

    Lubrication Before start, the machine must be lubricated properly with oil according to chapter 9.2 in the operating instructions. Sewing test This test can be carried out only after the machine is set completely. – Thread in the bobbin-winder thread. (see operating instructions). –...

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Lp 2974

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