Duerkopp Adler 739-23 Bedienungsanleitung

739-23

Sewing Machine for Small Parts

Operating Instructions

Installation Instructions

Maintenance instructions

Programming Instructions

P.O. Box 17 03 51, D-33703 Bielefeld •Potsdamer Strasse 190, D-33719 Bielefeld

Telephone +49 (0)521 925 01 •Fax +49 (0)521 925 13 15

Contents Page:

Introduction and general safety instructions

Part 1: Operating Instructions Class 739-23

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

1.1 Proper use .................................................. 5

1.2 Summary description ............................................ 5

1.2.1 Introduction .................................................. 5

1.2.2 Sewing machine head ........................................... 6

1.2.3 Material transport .............................................. 6

1.2.4 Dürkopp-Adler Control (DAC) ....................................... 6

1.3 Technical data ................................................ 6

1.4 Auxiliary equipment ............................................. 7

2. Operation of the sewing machine head ................................ 8

2.1 Recommended threads ........................................... 8

2.2 Replacement of needle ........................................... 9

2.3 Inserting of needle thread ......................................... 11

2.4 Needle thread monitor ........................................... 11

2.5 Adjustment of needle thread tension ................................... 13

2.6 Opening of needle thread tensioner ................................... 13

2.7 Adjustiment of thread regulator ...................................... 14

2.8 Winding of bobbin thread.......................................... 15

2.9 Replacement of bobbin ........................................... 16

2.10 Adjustment of bobbin thread tension ................................... 17

2.11 Inserting of needle and bobbin thread in thread scissors ....................... 18

3. Inserting of material in material clamps ............................... 19

4. Switching on of sewing machine and infeed of material clamps ................ 20

4.1 Switching on of sewing machine ..................................... 20

4.2 Infeed of material clamps.......................................... 21

4.3 Starting of sewing operation ........................................ 21

4.4 Termination of sewing operation ..................................... 21

5. Maintenance ................................................. 22

5.1 Tilting of machine head ........................................... 22

5.2 Cleaning and inspection .......................................... 22

5.3 Lubrication .................................................. 25

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. In this case, the operator

must ensure, that such applications are not carried out on a regular

basis and with a limited number of patterns and materials (please also

contact the Dürkopp Adler AG service department, who will be

delighted to assist you). Depending on the result, it might be necessary

to take suitable safety measures.

Generally, only dry material should be processed with this machine.

The thickness of the material may not exceed 3 mm when compressed

by the lowered sewing foot. The material may not contain any hard

objects. Otherwise, the operator must wear goggles. Suitable eye

protection is currently not available.

The seam is generally produced by textile threads (65/2 Nm for

synthetic fibres and 50/2 Nm for core spun. For other threads, the

operator must previously assess the risk involved and take suitable

precautionary measures.

The sewing machines may only be installed and operated in dry and

well-maintained rooms. If the sewing machine must be used in other

rooms,

additional measures might be necessary, that have to be agreed upon

by the manufacturer (see EN 60204-31: 1999).

As a manufacturer of industrial sewing machines, we assume that our

products are operated by personnel who are suitably trained, and we

thus assume that the general operation of machines and the potential

risks are known to the operating staff.

1.2 Summary description

1.2.1 Introduction The 739-23 is a sewing machine specifically designed for the

production of predefined seams, as found for example in flaps, cuffs,

waistband extensions, etc.

The cut material is manually inserted into the material clamp, which is

then placed in the guide of the sewing machine. Press the start key “S”

at the key bar to start the sewing process.

The seam beginning and the seam end can be locked, and the threads

are automatically cut off.

The data regarding the course of the seam and the contour are saved

in a transponder located on the material clamp.

1-5

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. This drive system

allows for short running times and ensures the exact positioning of the

sewing and transport tracks, due to its high repeat accuracy.

contributing thus to a high standard quality at high productivity.

The machine head is driven by D/C motor.

1.2.4 Dürkopp-Adler Control (DAC)

The DAC includes the extensive MULTITEST testing and monitoring

system.

A microcomputer controls and monitors the entire sewing process and

informs the operator on errors and disruptions by means of messages

on the display of the operating panel.

1.3. Technical data Machine head: class 271

Needle system: 2134-85

Needle strength: Nm 100

Stitch type: single-needle double lockstitch

Number of stitches: 200 - 4000 r.p.m.

Stitch length: 2.0 to 4.0 mm

Stitch condensation: 0.5 to 2.25 mm

Edge cutter: rotating, positioned around the needle centre

Cutting distance: Depending on sewing system

E1/4 for 4 mm

E1/5 for 5 mm

Blade lift: 5.5 mm

1-6

Operating pressure: 6 bar

Air consumption: 0.05 NL per cycle

Nominal voltage: 190 - 240 V, 50/60 Hz

Dimensions:

Table height: 820 - 1080 mm

Weight: 230 kg

Noise level : Lc = 80 dB (A)

Emissions per workplace

according to DIN 45635-48-B-1

Stitch length: 2 [mm]

Number of stitches: 2000[min-1]

Sewing material: G1 DIN23328 2 -play

1.4 Auxiliary equipment 0739 597514 Sewing lamp

0797 003031 Pneumatic connection set

9859 073901 Programming software CD 739

9850 739007 Transponder loader

9800 810001 1 Centrifugal blower (3x 380 - 415V/ 50Hz)

9800 810001 2 Centrifugal blower (3x 220 -240V/ 50Hz)

9800 810001 2 Centrifugal blower (3x 220 -240V/ 60Hz)

1-7

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.

Double core spun threads are in many cases offered by yarn

manufacturers under the same trade name as triple polyester fibre

threads (3-cylinder spun). This may lead to a certain confusion

regarding twisting and thread thickness.

If in doubt, open the thread and check whether it is double or triple

spun.

Number 120 on the label of a yarn reel of a core spun thread

corresponds for example to thickness Nm 80/2 (see values shown in

brackets in the table).

For monofile threads, needle thread and bobbin thread may be of the

same thickness. The best results are achieved, if the threads are soft

and elastic (software) and with a thickness of 139 Denier.

Recommended thread thickness

Needle strength Needle threadNeedle thread Position of Bobbin thread Bobbin thread

Nm tension thread regulator tensions

[g] [g]

100 cotton 60 - 100 3,5 cotton 30 - 40

NeB 50/2 70 - 100 NeB 50/2

Poly-Poly Poly-Poly

Nm 65/2 Nm 65/2

(Prod. 100) (Prod. 100)

1-8

2.2 Replacement of needle

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.

1-9

1-10

112

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