DURKOPP ADLER 381 User manual

Contents Page:

Preface and General Safety Information

Part 1: Operating Instructions Cl. 381 - 382

1. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2. Proper Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

4. Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6. Operation

6.1 Threading the Needle Thread . . . . . . . . . . . . . . . . . . . . . . . 9

6.2 Setting the Needle Thread Tension . . . . . . . . . . . . . . . . . . . . 11

6.3 Opening the Needle Thread Tension . . . . . . . . . . . . . . . . . . . 11

6.4 Setting the Tension Regulator . . . . . . . . . . . . . . . . . . . . . . . 12

6.5 Winding the Underthread . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.6 Inserting the Underthread Bobbin . . . . . . . . . . . . . . . . . . . . . 14

6.7 Setting the Underthread Tension . . . . . . . . . . . . . . . . . . . . . 15

6.8 Inserting and Changing Needles . . . . . . . . . . . . . . . . . . . . . 16

6.9 Lifting the Sewing Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.10 Arresting the Sewing Feet in the High Position . . . . . . . . . . . . . . 17

6.11 Setting the Sewing Foot Pressure . . . . . . . . . . . . . . . . . . . . . 18

6.12 Stitch Length on Sewing Machines without Automatic Bartacking . . . 19

6.12.1 Stitch Length on Sewing Machines with Automatic Bartacking . . . . . 20

6.13 Switching the Needle Bars On and Off . . . . . . . . . . . . . . . . . . 21

6.14 Roller Top Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7. Controls and Control Panel

7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7.2 Keys on the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . 24

7.3 Changing the Parameter Values . . . . . . . . . . . . . . . . . . . . . . 25

7.4 "Operator Level" Parameter List . . . . . . . . . . . . . . . . . . . . . . 26

7.5 Key Bank on the Machine Arm . . . . . . . . . . . . . . . . . . . . . . . 27

8. Sewing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

9. Maintenance

9.1 Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 30

9.2 Oil Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

10. Optional Equipment

10.1 Thread Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

1. Product Description

The DÜRKOPP ADLER 381 - 382 are special sewing machines for first-class

two-needle decorative seams.

•Two-needle flat bed double-saddle-stitch machine with bottom and needle feed.

The needles can be turned on and off.

•Class 382 additionally with roller top feed.

•Slit presser bar (international standard), thus allowing normal commercial sewing

devices to be used.

•Existing sewing devices of class 380 can be used.

•Central oil wick lubrication with visible reserve in the arm.

Manual hook lubrication.

•Integrated winder.

•Integrated adjustment disk.

2. Proper Use

The 381 - 382 are special sewing machines which can properly be used for sewing light

sewing material. Such material is, as a rule, fabric composed of textile fibers or leather.

These sewing materials are used in the garment and furniture industries.

Furthermore, it may be possible to also execute so-called technical seams with this

special sewing machine. Here, however, the operator (DÜRKOPP ADLER AG would be

pleased to help) must make an evaluation of the possible dangers since such

applications are, on the one hand, relatively rare and, on the other, their variety is

immense. Depending on the results of this evaluation it may be necessary to adopt

appropriate safety measures.

In general, only dry material may be worked with this special machine. The material

may not be thicker than 8 mm when it is pressed together by the lowered sewing feet.

The material may contain no hard objects because otherwise the sewing unit could only

be allowed to be operated with eye protection.

Such eye protection is not available at this time.

The seam is generally made with sewing yarns of textile fibers with dimensions up to

30/2 Nm (synthetic threads) or 30/3 Nm (core spun threads). Those wishing to use

other threads must also first evaluate the dangers arising herefrom and, if necassary,

take safety measures.

This special sewing machine may only be installed and operated in dry and clean areas.

If the sewing unit is employed in other areas, which are not dry and clean, other, to be

agreed upon, measures may become necessary (see EN 60204-3-1: 1990).

We, as a manufacturer of industrial sewing machines, assume that, at a minimum,

semi-skilled operating personel work on our products so that all normal operations and,

where applicable, their dangers can be presumed to be known.

3. Subclasses

Cl. 381 - 160161: Two-needle flat bed double-saddle-stitch machine with switchable

needles, bottom and needle feed, electromagnetic thread trimmer.

Cl. 381 - 160162: as Cl. 381 - 160161, additionally with electropneumatic automatic

bartacking and electropneumatic sewing foot lift.

Cl. 382 - 160162: as Cl. 381 - 160162, additionally with roller top feed

4. Optional Equipment

Order no. Optional Equipment

9822 510001 Sewing light (halogen) WALDMANN,

with 12V/20W lamp, to be attached to the sewing machine head.

OAPP 1241 Sewing light mounting kit, for 9822 510001.

0798 500088 Sewing light transformer

For 230V, with mains cable, without switch,

for sewing lights 9822 510001.

9780 000108 Maintenance unit WE 8

For pneumatic optional equipment.

0797 003031 Pneumatic connection package

For the pneumatic connection of frames with maintenance unit

and pneumatic optional equipment.

Consisting of connection hose (length 5 m, diameter 9 mm),

hose nozzles, hose clamps, coupling socket and coupling

plug.

0381 590014 Electromagnetic thread wiper for Cl. 381

0382 590014 Electromagnetic thread wiper for Cl. 382

N900 001941 Swing rail for apparatus

N900 011038 Edge stop-right, on base plate, fixed

N900 012015 Edge stop-right, on base plate, swing-down

N900 020039 Edge stop-right, on the sewing machine head, swing-up

5. Technical Data

Noise level: Work station relevant emission value

to DIN 45635-48-A-1-KL2

Cl. 381 - 160161 Lc = __ dB (A)

Stitch length: __ mm

Number of stitches: 3 000 [min-1]

Material: ___________________

Cl. 381 - 160162 Lc = ___ dB (A)

Stitch length: __ mm

Number of stitches: 3 000 [min-1]

Material: ________________

Cl. 382 - 160162 Lc = __ dB (A)

Stitch length: __ mm

Number of stitches: 3 000 [min-1]

Material: ________________

The values were not available at press time !

Needle system: 797

Needle thickness (depending on E no.): [Nm] (70 to 110) 90

Seam width / needle clearance: [mm] 4.8 11.9 (25.4)

(depending on E no.)

Max. sewing thread thicknesses:

- Synthetic sewing thread [Nm] 30/2

- Core spun thread [Nm] 30/3

Max. number of stitches: [min-1] 3 000 *

Max. stitch length:

- Forward: [mm] (2 400 stitches/min) 6 *

- Reverse: [mm] (2 400 stitches/min) 6 *

Max. sewing foot stroke: [mm] 10 (Cl. 381)

9 (Cl. 382)

Feed dog stroke: [mm]

(above the needle plate) 1.1

Max. opening under the sewing feet:

- Sewing [mm] 8

- Raised [mm] 10

Operating pressure: [bar] 6

Air consumption per work cycle: approx. [NL] 0.02

Design voltage: 1 x 230 V, 50 / 60 Hz

Dimensions (H x W x D): [mm] 1750 x 1060 x 500

(depending on table top) 1750 x 1060 x 600

1750 x 1250 x 900

Work height (ex works): [mm] 790

Weight (only machine head): approx.[kg] 40

* At max. stitch length the number of stitches must be reduced to 2 400 stitches/min.

6. Operation

6.1 Threading the Needle Thread

Caution Risk of Injury !

Turn the main switch off !

Thread the needle thread only with the sewing machine

turned off.

–Place the yarn spools on the yarn stand as shown in the illustration and guide the

needle and underthreads through the take-off arms.

The take-off arms 1 and 3 must lie vertically above the yarn spools.

The take-off arms 2 and 4 are to be set as per the drawing.

They prevent the two needle threads from hitting each other.

–Thread the needle thread as per the drawing on page 10.

variocontrol 720

E+

Illus. a: Correct thread interlacing in the

middle of the material

Illus. b: Needle thread tension too low

Underthread tension too high

Illus. c: Needle thread tension too high

Underthread tension too low

6.2 Setting the Needle Thread Tension

Main tension 3

The main tension 3 is to be set as low as possible.

The interlacing of the threads should lie in the middle of the material (see Illus. a ).

Too high thread tensions can lead to unwanted bunching in thin material and thread

breakage.

–Set the main tension 3 so that a uniform stitch pattern is achieved.

Supplimentary tension 2

The switchable supplimentary tension 2 serves for the quick change of the needle

thread tension, e.g. at seam thickenings.

–Set the supplimentary tension 2 lower than the main tension 3.

–Turn the supplimentary tension 2 on or off with lever 1.

0 = Supplimentary tension 2 is turned off.

1 = Supplimentary tension 2 is turned on.

6.3 Opening the Needle Thread Tension

Automatic

The needle thread tension is automatically opened during thread trimming.

Note

The timing of the thread tension opening can be set with the parameters F-191 and

F-192 (technician level).

Manual

The main and supplimentary tensions can be opened by hand through pressure on A.

6.4 Setting the Tension Regulator

The needle thread quantity required for the hook is adjusted with the tension regulator 2.

The setting is dependent on the following factors: - Material thickness

- Yarn characteristics

- Stitch length

A prescisely set tension regulator assures an optimal sewing result at the lowest

possible needle thread tension.

With a correct setting, the needle thread loop must glide over the thickest point of the

hook with little tension.

In position " 1" of the tension regulator the maximum thread quantity is released.

In position " 5" of the tension regulator the minimum thread quantity is released.

Caution Risk of Injury !

Set tension regular 2 only with the sewing machine turned

off.

–Loosen screws 1 and 3.

–Alter the position of the tension regulator 2.

The scale above the tension regulator serves as a setting aid.

–Tighten screws 1 and 3.

Setting note:

For a correct setting of the tension regulator 2 the following condition must be met:

–When the greatest thread quantity is required, the thread controller spring 4 must

be pulled approx. 0.5 mm up out of its upper end position.

This is the case when the needle thread loop passes the maximum diameter of the

hook.

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