DURKOPP ADLER LP 2971 Manual de usuario

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 Teile-Nr./Part.-No.:

06/2012 Rev. index: 00.0 Printed in Czech Republic 0791 888761

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.

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.

The instruction manual is intended to complement existing national

accident prevention and environment protection regulations.

The instruction manual must always be available at the machine/sewing

unit.

The instruction manual must be read and applied by any person that is

authorized to work on the machine/sewing unit. This means:

–Operation, including equipping, troubleshooting during the work

cycle, removing of fabric waste,

–Service (maintenance, inspection, repair) and/or

–Transport.

The user also has to assure that only authorized personnel work on the

machine.

The user is obliged to check the machine at least once per shift for

apparent damages and to immediatly report any changes (including the

performance in service), which impair the safety.

The user company must ensure that the machine is only operated in

perfect working order.

Never remove or disable any safety devices.

If safety devices need to be removed for equipping, repairing or

maintaining, the safety devices must be remounted directly after

completion of the maintenance and repair work.

Unauthorized modification of the machine rules out liability of the

manufacturer for damage resulting from this.

Observe all safety and danger recommendations on the machine/unit!

The yellow-and-black striped surfaces designate permanend danger

areas, eg danger of squashing, cutting, shearing or collision.

Besides the recommendations in this instruction manual also observe

the general safety and accident prevention regulations!

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. Observe all

the relevant safety regulations.

4. When gauge parts are exchanged (e.g. needle, presser foot, needle

plate, feed dog and bobbin) when threading, when the workplace is

left, and during service work, the machine must be disconnected

from the mains by switching off the master switch or disconnecting

the mains plug.

5. Daily servicing work must be carried out only by appropriately

trained persons.

6. Repairs, conversion and special maintenance work must only be

carried out by technicians or persons with appropriate training.

7. For service or repair work on pneumatic systems, disconnect the

machine from the compressed air supply system (max. 7-10 bar).

Before disconnecting, reduce the pressure of the maintenance unit.

Exceptions to this are only adjustments and functions checks made

by appropriately trained technicians.

8. Work on the electrical equipment must be carried out only by

electricians or appropriately trained persons.

9. Work on parts and systems under electric current is not permitted,

except as specified in regulations DIN VDE 0105.

10. Conversion or changes to the machine must be authorized by us

and made only in adherence to all safety regulations.

11. For repairs, only replacement parts approved by us must be used.

12. Commissioning of the sewing head is prohibited until such time as

the entire sewing unit is found to comply with EC directives.

13. The line cord should be equipped with a country-specific mains

plug. This work must be carried out by appropriately trained

technicians (see paragraph 8).

It is absolutely necessary to respect the safety

instructions marked by these signs.

Danger of bodily injuries !

Please note also the general safety instructions.

Contents Page:

Introduction and safety instructions

Part 1: Operating Instructions LP 2971, LP 2974 – Original Instructions

(Edition 06/2012)

1 Product description ........................................... 5

2 Designated use .............................................. 5

3 Subclasses ................................................. 6

4 Optional equipment ............................................ 7

5 Technical data ............................................... 7

5.1 Technicaldatasubclasses......................................... 8

6 Operation

6.1 Threading the needle thread ....................................... 9

6.2 Winding the hook thread .......................................... 10

6.3 Bobbin insertion and threading the hook thread ........................... 10

6.4 Adjustingthethreadtension........................................ 11

6.4.1 Adjusting the hook thread tension .................................... 11

6.4.2 Adjusting the needle thread tension ................................... 12

6.5 Switching on/off the thread tensioners ................................. 13

6.6 Adjusting the thread regulator....................................... 14

6.7 Changing the needle with single-needle machines with the hook on the right .......... 15

6.8 Changing the needle with double-needle machines ......................... 16

6.9 Liftingandfoldingtherollerpresser................................... 17

6.10 Sewing-foot pressure through the setting wheel ............................ 18

6.11 Sewing backward (feeding backward; backtacking).......................... 19

6.12 Setting the stitch length .......................................... 19

6.13 Switching on the safety clutch at the hook blocking.......................... 20

6.14 Operating the machine equipped with the positioning motor .................... 21

6.14.1 Using the pedal ............................................... 21

6.14.2 Using the key................................................. 22

7 Positioning drive Efka DC1550/DA321G ............................... 23

8 Sewing with machine equipped with positioning motor

8.1 Machineautomaticfunction........................................ 24

8.2 Example of machine operation at sewing ............................... 25

9 Maintenance

9.1 Cleaning and checking .......................................... 26

9.2 Lubrication .................................................. 28

Notes:

1 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.

In single and double needle machines, the first step represents 30%

of the total stitch length.

•The machine is either single needle or double needle unit with

automatic functions such as thread trimming, automatic

backtacking, automatic foot lifting, or without them.

•The machine is equipped with a large two part vertical hook.

•Maximum foot lift is 12 mm.

•The residual thread length after thread trimming is about 15 mm.

•The hook is protected with a safety clutch against the

disarrangement of the adjusted position at the blocking of the

thread which interfered with its way.

•The throat plate has replaceable inserts with the stitch hole

dimension difference, which are optional in dependence on the

needle number.

•The machine has automatic wick lubrication from the central oil tank

with a visual check of the oil level by oil level indicator in the

machine arm. The part of the oil with which the hook is lubricated is

devaluated. The other part of the lubrication oil is returned to the

central tank by a pump.

•Integrated bobbin winder.

2 Designated use

The class LP 2971, LP 2974 is designated for sewing shoe, leather,

and upholstery sewing. In general, the material sewn is leather (natural

or artificial). It is possible to use it for shoe fabrics too.

The equipment for light, medium or heavy sewing is mounted on the

machine as an option.

It is possible to sew dry material only which may not be thicker than

7 mm when pressed down with a roller presser. The material may not

contain hard objects, as the machine is not equipped with an eye

guard. This machine may be operated in dry rooms and by a trained

person only who is aware of the risks described in this instruction.

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).

As manufacturers of industrial sewing machines we proceed on the

assumption that personnel who work on our products will have

received training at least sufficient to acquaint them with all normal

operations and with any hazards which these may involve.

3 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

machine with feed wheel, blocked needle feed with

driven roller foot and large hook, electro-magnetic

thread cutter, electro-magnetic seam bartacking and

sewing foot lifting.

4 Optional equipment

The following optional equipments are available for the class LP 2971,

LP 2974 :

Order No. Optional equipment Subclasses

LP 2971

LP 2974

9880 888101 Integrated sewing light with 2 LED, incl. x x

dimmer transformer

9880 888100 Diode sewing light 3W x x

0888 320254 Variator for a continuous regulation of x x

the difference between the feed wheel and

thedrivenrollerfoot

0888 310134 Needle feed blocking x o

0867 490013 Bracket for the control panel x x

N800 080030 Rectractable material guide x x

N800 080040 Retractable roller material guide x x

9081 300001 Tool kits M-type x x

Stand

MG 55 400334 Stand set MG 55-3 xxxxxxxxxxx

for toothed belt drive, with pedal

Table top size 1060 x 500 mm

x = Optional equipment

o = Standard equipment

Additional optional equipments can be requested:

E-Mail: [email protected]

marketing@duerkopp-adler.com

5 Technical data

Noise: Workplace-related emission value in accordance with DIN 45635-48-A-1-KL2

LP 2971 LC = _dB (A)

Stitch length: _ mm Sewing foot stroke: mm Speed: ____ min -1

Material:

LP 2974 LC = _dB (A)

Stitch length: _ mm Sewing foot stroke: mm Speed: ____ min -1

Material:

5.1 Technical data of the subclasses

Subclasses

LP 2971

LP 2974

Type of stitch Lock stitch 301

Hook type

large

Number of needles 1 2

Needle system 134

Needle size 160

(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. Speed [min-1] 3000

Number of stitches with

factory setting [min-1] 2500

Max. sewing foot stroke [mm] 12

Dimensions (H x W x D) [mm] 550 / 220 / 600

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