Duerkopp Adler 173 User manual

Contents: Page:

Foreword and general safety instructions

Part 1: Operation manual classe 171 •173

1. Product specifications

1.1 Short description and use for the intended purpose . . . . . . . . . . . 5

1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Optional equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2. Machine elements and their functions

2.1 Elements at the machine head . . . . . . . . . . . . . . . . . . . . . . 6

2.2 Elements at the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Operating

3.1 Threading the needle thread . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Threading the looper thread . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3 Adjusting the thread tensions . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Amount of needle thread for secure stitch formation . . . . . . . . . . 12

3.5 Adjusting the looper thread take-up . . . . . . . . . . . . . . . . . . . . 14

3.6 Setting the feeding length . . . . . . . . . . . . . . . . . . . . . . . . . 15

a) Bottom feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

b) Top puller feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4. Maintenance

4.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2 Lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5. Information on sewing with monofilament threads . . . . . . . . . 18

The following patents and registered designs apply:

Status October 1992

DE 86 20 593

JP Sho-62-108358

TW 40 985

1. Product specifications

1.1 Short description and use for the intended purpose

The 171 and 173 are double chainstitch (stitch type 401) sewing machines in single or

twin needle version.

The loopers are across the line of sewing (Crossline).

Class 171 with drop oscillation feed.

Class 173 with drop oscillation feed and intermittent top puller feed.

The feeding lengths of feed dog and puller are independently adjustable at separate

dials. When changing over to stitch condensing, the feeding length of the puller is

automatically reduced accordingly.

In accordance with the intended purpose, the machines must only be used for sewing

materials made of textile fibres and leather.

1.2 Technical data

Feeding length of the top puller feed: max. 7 mm

Standard puller width: 9 mm N

934 SIN or 933 depending on the sewing

equipment (E-Nr.)

Maximum clearance under the sewing foot:

When lifting: 5 mm with the needle 934 SIN

10 mm with the needle 933

When sewing: 4 mm

Operating pressure: 6+/-0.5 bar

Air consumption: On the -161120 0.05 NL per work cycle

On the -141521 0.1 NL per work cycle

1.3 Optional equipment

Order numbers

1713502 Set of parts for converting a single needle- into a twin needle double

chainstitch sewing machine. Max. needle distance 14 mm depending on the

E-Nr. Not for subclass 173-141521.

933 5736 Steel puller 1 mm toothed, 9-mm-wide

933 5737 Steel puller 1 mm toothed, 15-mm-wide

933 5738a Steel puller 2 mm saw-toothed, 15-mm-wide

The steel pullers must not touch, the distance to the throat plate must be 0.5 mm.

For the adjustment see the service manual. 16-mm-wide asymmetric Vulcollan puller

and a hook knife are contained in the accessories. The position of the puller with

respect to the seam or fabric fold may be varied depending on how it is mounted.

Subclasses Stitch

length Speed

at work/ max. Needle

stroke Stitch

condensati

Foot lifting Thread

cutter

171-131110 1-4 mm 6600 / 7000 27 mm

173-141110 1-4 mm 5800 / 6000 30 mm

173-141521 1-4 mm 5800 / 6000 30 mm •••

2. Machine elements and their functions

2.1 Elements at the machine head

Element Function

Hand lever 1 –Swinging up the puller. It is swung out of the working

area.- Sewing with bottom feed only.

Screw 2 –Regulating the sewing foot pressure depending on the

material.

Oil check tube 3 –Monitoring the oil circulation for the lubrication of the

front arm shaft bearing. The oil flow must not be

interrupted while the machine is running. If necessary,

check the oil level in the reservoir 8 or top up with oil.

Only ESSO SP-NK 10 or an oil of the same quality

must be used.

Dial 4 –Feeding length for the top feed puller.

Needle thread puller 5

(Only subclass -141521) –Initial thread for the stitch formation at the seam

beginning after the threads are trimmed.

Needle thread tension 6 –One revolution of the turning button with numerals

covers the entire tension range. Thus, the tension

values can be easily reproduced.

Looper thread tension 7 –Same as 6, but with a weaker tension spring.

Oil reservoir 8 with

inlet opening –The oil level must not drop below "MIN". If necessary,

top up with ESSO SP-NK 10 oil to "Max".

Dial 9 –Setting the stitch length for the bottom feed.

Looper thread puller 10

(Only subclass -141521) –Initial thread for the stitch formation at the seam

beginning after the threads are trimmed.

Release lever 11 for

the thread tensions –Pulling out the threads by hand, eg when threading

Thread guide 12 –Basic adjustment centre of the elongated hole.

Needle 13 –System 934 SIN or 933.- Needle sizes Nm 80-130

depending on the sewing equipment (E-Nr.).

To exchange the needle, always turn off the

main switch! - Danger of injury!

Thread regulator 14 –For secure stitch formation in the case of elastic

threads, such as eg synthetic spun threads and

monofilament threads. For the adjustment see

section 3.4.

Locking button 15 –Locking the foot in its lifted position.

1 2 3 4 5 6 7

9 8

11 10

13 12

15 14

Element Function

Key 17 –Undefined

Key 18 –Single stitches

Key 19 –Needle up or down at machine standstill. During

sewing condensed stitches may be sewn anywhere wit-

hin the seam.

Key 20 –Raising or lowering the puller.

Control panel 21

(Only subclasses -141521

and -161120)

–See instructions of the motor manufacturer.

Note: To enable thread trimming on the subclass -

141521, not only the key "thread trimming", but also

the key "thread wiping" at the control panel must be

always switched on. Diodes aand b must be luminous.

Knee lever 22 –Prior to tilting the machine head backwards, TURN

OFF the main switch and remove the knee lever. To un-

hook, make the motions 1 and 2 and to hook up, make

the motions 3 and 4.

Infrared reflecting

light barrier 23 –To sense the fabric edge and thus, the correct

position of the condensed stitches at the seam end.

Looper drive housing 24 –With the machine head tilted backwards the oil level

must not drop below the lower long mark.

If necessary, turn out the screw 26 and top up with oil

ESSO SP-NK 10. The oil must just be filled up to the

upper mark.

Looper thread take-up 25 –It automatically adjusts the amount of looper thread to

the set stitch length.

For adjustments for tight, regular or highly elastic

seams see section 3.5.

21 a b

2.2 Elements at the stand

Element Function

Main switch 1 –Turning on and off the machine.

Always turn off the main switch prior to threading,

changing the sewing tools (such as eg needle,

sewing foot, throat plate, slide plate etc.),

cleaning, when leaving the workplace as well

as for maintenance work.

See also General Safety Instructions.

Pedal 2 –0 Idle position - No function.

1 Sewing foot lift at machine standstill

2 Sewing up to the maximum speed by pressing down

the pedal accordingly.

3 Stitch condensing - thread trimming* - sewing foot

lift.

* Not on subclass -161120

Maintenance unit

Air filter with water

separator 7 –Before the water level reaches the air filter 6, screw in

the screw 8 and blow off the water under pressure.

Pressure regulator 4 –To set the air pressure of 6 bar, pull up the knob 4 and

turn it.

Turning to the right = Pressure increase

Turning to the left = Pressure decrease

Mist lubricator 9 –Adjust approx. 1 drop of oil for 10 work cycles using

the regulating screw 11.

To top up with oil, vent the pneumatic system. To do

this, turn the knob 4 to the left.

Turn out the screw 10 and fill with ESSO SP-NK 10 oil

up to the groove on the oil reservoir 9.

3. Operating

3.1 Threading the needle

thread

Turn off main switch.

-Danger of injury! -

For threading the needle thread proceed

as shown in the figures opposite.

3.2 Threading the looper

thread

Turn off main switch.

-Danger of injury! -

For threading the looper thread also

proceed as shown in the figures

opposite. To do this, lift the thread down-

holder 3 out of its locked position.

3.3 Setting the thread

tensions

The needle thread tension must be

tighter than that of the looper thread.

The looper thread tension 2 is, therefore,

equipped with a spring made of thinner

wire.

Too tight thread tensions cause com-

pression of the material. A too loose

thread tension may lead to skipped

stitches.

For a larger amount of looper thread

pulled into the seam see section 3.5.

3.4 Needle thread amount for

secure stitch formation

In the case of elastic sewing threads, eg

synthetic spun threads or monofilament

threads, a certain amount of needle

thread must be pulled to assure a secure

stitch formation.

This takes place when the take-up lever

is in its bottom position in conjunction

with the height adjustment of the thread

regulator 1.

With the take-up lever in bottom position

adjust the thread regulator as follows:

In the case of elastic needle threads the

thread eyelet in the take-up lever should

be visible below the thread regulator.

Pass the needle thread on the left of the

bracket. See fig. a.

With unelastic threads, such as eg cot-

ton, the thread eyelet should be visible

above the thread regulator. Pass the

thread on the right of the bracket. See fig.

Abb. / Fig.

This manual suits for next models

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