Duerkopp Adler 271 User manual

Contents Page:
Preface and General Safety Notes
Part 1: Operating Instructions Cl. 271 to 274
1. Product Description
1.1 Short Description and Proper Use . . . . . . . . . . . . . . . . . . . . . 5
1.2 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Machine Elements and their Functions
2.1 Elements on the Machine Head . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Elements on the Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3. Operating
3.1 Needles, Threads and Thread Tension . . . . . . . . . . . . . . . . . . . 14
3.2 Spooling the Bobbin Thread . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Replacing the Bobbin and Setting the Looper Thread Tension . . . . . . 15
3.4 Threading the Needle Thread . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 Regulating the Needle Thread Tension . . . . . . . . . . . . . . . . . . . 17
3.6 Thread Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4. Maintenance
4.1 Cleaning and Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Following Patents and Registered Utility Models apply:
Status March 1994
DE - 41 15 520 DE - 87 05 550
DE - 41 05 563 JP - 1 933 346
JP - HEI - 4 - 32044 DE - 41 38 402
DE - 40 04 892 JP - HEI - 4 - 312432

1. Product Description
1.1 Short Description and Proper Use
The 271 to 274 are flat single needle-double saddle stitch
sewing machines with thread trimming devices for
straight seams to stitch type 301.
Properly employed the machine may only be used for
sewing materials of textile fibre and garment leather.
271 with skipping bottom feed.
The machine has an automatic central oil wick lubrication
with oil reservoir as well as a seperate automatic hook
lubrication, also with oil reservoir. The oil levels are
visible through inspection glasses.
Through equipping with thread regulators the same
sub-classes, with appropriate choice of sewing device
and needle, can be used for sewing thick as well as thin
material.
The operation of the tension activation, the thread
trimming, the automatic bartack and the pressure foot lift
occur electro-magnetically. No compressed air is required
with the exception of classes 273, 274 and 272-740142.
For further technical characteristics and equipment for
each sub-class see under 1.2 Technical Data.
272 as 271, but with additional needle transport.
273 as 271, but with additional intermittent roller top feed.
The transport distance of the roller top feed is a max.
7mm. With an adjustment wheel at the front of the
machine arm it can be given a setting differing from the
bottom feed.
It has stable rpm up to a maximum number of stitches of
5500 stitches/min. This means constant stitch lengths as
well as smooth and unshifted seams even with quick rpm
changes.
Automatic lifting of the carrier roller by change over to
transport to the rear(bartack).
274 as 273, but with additional needle transport.
5

1.2 Technische Data
Sub-classes Stitches/min 1 2 3 4 5 6 7
max. from
factory
271-140041 5500 4800 4mm x
271-140042 5500 4800 4mm x x x
271-240042 5500 4800 4mm x x x x
272-140041 5000 4800 4mm x
272-140042 5000 4800 4mm x x x
272-160062* 5000 4000 6mm x x x
272-640141 5000 4800 4mm x x
272-640142 5000 4800 4mm x x x x
272-740142 5000 4800 4mm x x x x
273-140042 5500 4800 4mm x x x
274-140042 5000 4800 4mm x x x
* Extra-large shuttle = 70% greater capacity of the underthread spool than with the
standard hook
To 1: Max. stitch length for each sub-class
To 2: Thread trimming for needle and bobbin thread
To 3: Electro-magnetic automatic bartack. It is switched via the pedal and executes
the following functions: lowering the pressure foot, seam beginning and seam
end bartack, needle and bobbin thread trimming, raising the pressure foot.
To 4: Keys on the arm head:
- Needle high - low
- Bartack on - Bartack function switched off at the control panel
- Bartack suppressed - Bartack function switched on at the control panel
- Bartack within the seam
To 5: Edge cutter right, next to the needle. Switched on and off with the hHand lever
or, as optional equipment, electro-pneumatically via key. Depending on the
sewing unit (E-no.), the cutting interval is 3.5 ; 5.0 ; 8.0 or 10mm. Special
sewing devices are required for graduated cutting. The knife stroke is 5.5mm.
To 6: Edge cutter, but with seperate electric drive. Two cutting rpms can be switched
in.
To 7: Edge cutter, which cuts into the material edge crosswise during sewing, e.g. for
tension-free turning over of round neck openings, collars, arm holes, etc. The
cut occurs after every 6 stitches. On request after 4 stitches. The cut depth has
a max. of 15mm. It is adjustable up to about 1mm to the seam.
Needle system: 134, 797 or Sy 1955-01
clearance under the pressure foot
When raised: 8.0mm by 271 and 273
9.5mm by 272 and 274
When sewing: 8.0mm
Operating pressure: 6 bar
Air consumption: 0.02 Nl per work cycle by 273 and 274
0.1 Nl per work cycle by 272-740142
mm
6

Noise Level Lc: Work station specific emmission value to DIN
45635-48-A-1-KL2 by stitch length 3.2mm
271-140041 and 140042 with stitches 4800/min. = 80
dB(A)
272-140041 and 140042 with stitches 4800/min. =
82dB(A)
272-140041 and 140042 with stitches 4500/min. =
80dB(A)
1.3 Optional Equipment
App. 301 Covering hood for the machine head
Z 120 1801 Electro-magnetic thread wiper for 271 and 272
sub-classes -140000 and -160000
Z 120 1851 Electro-magnetic thread wiper for 273 and 274
Z 133 371 Reflected light barrier for automatic sewing stop at
the material end with follow-up functions. For motors
with external control panel V730 or DB5.
Z 116 6741 Electro-pneumatic device for alternating sewing with
two differently set stitch lengths and two differently
set needle thread tensions. Normal seam and seam
with thread drawing (basting stitches). Partial
strengthened tension (Seam thickening) and
ornamental seams.
Z 124 401 Electro-pneumatic operation for on/off switching of
the edge cutters via key for 272-640142.
Z 145 1 Graduated edge cutting (finger version for lightest
materials). In conjunction with the sewing unit 272/E
111 for widths of cut of 4.5 and 7mm.
Z 145-101 Graduated edge cutting (2 knife version for medium
heavy material). In conjunction with sewing unit
272/E 112 for widths of cut of 3.5 and 6,5mm.
722 2041 Container for cutting waste for connection to the
in-house vacuum system. If this is not available then
the appropriate centrifugal blower is to be used.
999 260029 for 3-phase current 380-400V+N, 50Hz
999 260030 for 3-phase current 220-230V, 60Hz
999 260031 for 3-phase current 415-440V, 50Hz
933 5736 Toothed steel roller, 9mm wide for 273 and 274 roller
transport
273 1041 u. 274 1141 Height setting for the pressure foot with hard to
transport material, e.g. velvet.
570 1833 Filter regulator for the compressed air connection
271 661 Parts set, knee lever for pressure foot lift by
machines with automatic bartacker.
271 1671 Parts set, hand lever for seam bartacking for
machines with automatic bartacker.
7

2. Machine Elements and their Functions
2.1 Elements on the Machine Head
Element Function
1Screw – Regulating of the pressure foot pressure. The
Setting of the screw is to be fixed.
2Hand lever – Turning the edge cutter 10 on and off. The position
of the hand lever is variablly adjustable.
3Spooling device – See under Section 3.2 Spooling of the Bobbin
Thread.
4Control panel – See the motor manufacturer’s instructions.
5Oil reservoir – The oil level should not be allowed to drop below
"MIN". When necessary fill with ESSO SP-NK10 oil
to "MAX".
6Adjustment wheel – Setting the stitch length for reverse sewing (with
sub-classes -....41 via hand lever).
7Adjustment wheel – Setting the stitch length for forwardsewing (with
sub-classes -....41 via hand lever).
8Rest – For tilting the machine head to the back (not on
classes 273 and 274).
9Needle thread tension – Turn in direction + = higher needle thread tension
Turn in direction - = looser needle thread tension
10Edge cutter – Function see following page.
11Needle – System 134, 797 or Sy 1955-01
- Risk of Injury! -
Before replacing the needle it is essential to turn the main
switch off.
12Locking button – Lock the pressure foot in the raised position
13Hand lever – Setting the carrier roller up. It is swung out of the
work area. Sewing only with bottom feed
14Adjustment wheel – Transport length for the top feed roller
15Roller top feed – Function see following page
8

E
l
e
m
e
n
t
6
101112 9 8 7 5 4
12 3
272-640142
13 14 274-140042
15
9

Element Function
16Separate drive
for edge cutter – Two cutting rpms switchable (only 272-740142)
- Risk of Injury! -
Caution in the area of the edge cutter.
17LED – The blinking of the diode shows that the edge cutter
is operationally ready. To switch on and off the
following variants are available:
* Manual via key
* Via the sewing pedal through the run signal of the
sewing drive
* Automatic "On" or "Off" after a selected number of
stitches
* Automatic "Off" after thread trimming (See
Installation Instructions Section 13.)
18Switch for
edge cutting – I = Normal rpm D = Drive "Off". Knife outside the sewing area
II = Increased rpm for greater stitch lengths and thick
materials
19LED – Indicator for main switch "On" (only 272-740142)
20Key – Beginning or end bartack on - Bartack off at the
control panel
Beginning or end bartack off - Bartack on at the
control panel
21Key – Single stitches
22Key – With sewing machine at rest: Needle up-down.
With sewing operation: Bartack (reverse sewing) at
desired position in the seam
23Key – Switching the edge cutter on and off. By sub-class
272-640000 the pneumatic operation Z124-401
(optional equipment) must have been installed.
Otherwise the key has no function.
24Key – Raise and lower the top feed roller manually.
Automatic lowering after a number of stitches see
Installation Instructions Section 12.
25Knee lever
(only sub-classes -....41) – Before tilting the machine head to the back turn the main switch off and remove the knee lever. To slip it
out conduct movements 1 and 2 and to hang it back
in movements 3 and 4.
26Hook lubrication – The oil reservoir for the hook lubrication should not
drop below the "Min" mark.
By normal operation the oil level should be checked
weekly. Through the fill opening fill Esso SP-NK 10
oil up to the "Max" mark.
The oil flow for the hook lubrication can be regulated
at screw 5.
10

16 1918
272-740142
17
20
21
22
24
526
OIL SP-NK 10
20
21
23
22
11

2.2. Elements on the Frame
Elements Function
1Main Switch – Turn the sewing drive on and off.
The sewing machine head is operational.
Attention!
For threading, replacement of sewing tools (such as
needle, pressure foot, needle plate, material feed etc.),
cleaning, when leaving the work place as well as during
maintenance work it is essential to turn the main switch
off.
See also General Safety Notes.
2Pedal – A Rest position. No function.
B Raise pressure foot during machine rest
CSewing to a maximum number of stitches by
appropriate step down.
DSeam bartacking* - Thread cutting - Raise
pressure foot*
*Not with sub-classes -....41
Maintenance unit
6Air filter and
7Water seperator – Before the water level reaches the air filter 6 screw in screw 8 and relaese the water under pressure.
4Pressure regulator – For setting the air pressure at 6 bar pull up and
adjust the knob 4.
Turn to the right = Pressure increase
Turn to the left = Pressure decrease
9Oil Mister – The oil mister provides the solenoid valves and
cylinders with lubricating oil .
With the regulating screw 11 set at approx. 1 drop of
oil for 15 work cycles.
To fill the mister 9 turn off the compressed air. Do
this by pulling up the knob 4 and turning to the left.
Screw out screw 10 and fill Esso SP - NK 10 oil up to
the grooved marking of the oil reservoir.
12