Beisler 739-23-1 User Manual

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 [phone] • Fax [phone]

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.

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1.2.2 Sewing machine head

1.2.3 Material transport

1.2.4 Dürkopp-Adler Control (DAC)

–

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

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.

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

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1.4 Auxiliary equipment

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

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)

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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)

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