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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
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