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
e
e
d
l
e
s
y
s
t
e
m
:
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
on
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 •••
5

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.
6

1 2 3 4 5 6 7
9 8
11 10
13 12
15 14
7

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.
8

22
25
18
19
17
20
21 a b
23
26
24
9

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.
10

11
10
9
4
5
96
7
8
1
2
11

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.
b.
1
a
Abb. / Fig.
b
3
12