Dürkopp Adler 767 - User manual

767
Spezialnähmaschine
Bedienanleitung
Operating instructions
Instructions d'emploi
Instrucciones de uso
Instrucções de operação
Istruzioni per l’uso
Postfach 17 03 51, D-33703 Bielefeld • Potsdamer Straße 190, D-33719 Bielefeld
Telefon +49 (0) 5 21 / 9 25- 00 • Telefax +49 (0) 5 21 / 9 25 24 35 • www.duerkopp-adler.com
Ausg./Edition: 08/2005 Printed in Federal Republic of Germany Teile-Nr.: 0791 767742
GB
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Contents Page:
Preface und general safety instructions
Part 1: Operating manual Cl. 767
1. Product description .............................. 5
2. Designated use................................. 5
3. Subclasses
3.1 Optional equipment ............................... 6
4. Technical data
4.1 Subclasstechnicaldata............................ 8
5. Operation
5.1 Upper thread ................................... 10
5.2 Adjusting the thread regulator ........................ 11
5.3 Loserthread................................... 13
5.4 Changing the needle .............................. 15
5.5 Liftingsewingfeet ............................... 15
5.6 Securingthesewingfeet............................ 15
5.7 Sewing-footstroke ............................... 17
5.8 Sewing-footpressure.............................. 18
5.9 Stitch length ................................... 18
6. Keys on sewing arm.............................. 19
7. Control and operating panel
7.1 V810 Operating panel key ........................... 21
7.2 V820 Operating panel key ........................... 22
7.3 Changing parameter values .......................... 24
7.4 Directparameternumberselection...................... 24
7.5 Operator-level parameter list for EFKA controls DA82GA and 6F82FA . 25
8. Sewing ...................................... 26
9. Maintenance
9.1 Cleaning and inspection ............................ 29
9.2 Lubrication .................................... 31
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Contents Page:
10. Optional equipment
10.1 Residual-thread monitor RFW 13-3/RFW 13-6/RFW 13-8/RFW 13-9 . 32
10.2 2nd Stitch length STLS 13 - 2 ........................ 34
10.3 Electro-pneumatic rapid stroke adjustment HP 13 - 7 .......... 36
10.4 Upper and lower conveyor rollers SP 470 ................. 37
10.5 AutomaticloweringWTA13-2........................ 38
10.6 Additional tension FS 13 - 1 .......................... 39
10.7 Seamcenterguide............................... 41
10.8 SkipStitchDevice(SSD)FSE13-1/2 .................... 43
11. Short thread trimmer
11.1 CheckEPROM-Version ............................ 45
11.2 Position of the thread-pulling knife and the counter-knife ........ 45
11.3 Adjustthethreadcuttingstitchbeforethreadcutting........... 45
11.4 Thread clamp (Thread feeding device) ................... 46
11.5 Errors,CauseandRemedy.......................... 46
The illustrations in this Operating manual relate to various subclasses of the
special sewing machine !
Please bear in mind that your special sewing machine may be different from the
machine illustrated !

1. Product description
The DÜRKOPP ADLER 767 is a special sewing machine with universal applications.
·Flat-bed double-stitch sewing machine with lower conveyor, needle transport and
alternating upper foot conveyor.
·Subclasses available: one or two needles, with or without edge cutter and with or
without thread trimmer beneath the stitch plate.
Single-needle machines are convertible to double-needle machines.
(not 767-AE-73 / 767-AE-5-73)
·All subclasses have device racks in the base plate for the rapid replacement of
various devices. (not 767-AE-73 / 767-AE-5-73)
·Maximum clearance beneath lifted sewing feet: 16 mm
(with -AE and -LG max. 13 mm).
·Stroke of alternating sewing feet adjustable with adjusting wheel by up to 7 mm.
·Automatic non-pressurised oil-circulating lubrication with sight glasses for oil level
and oil circulation. Integrated hook lubrication.
·Large, two-piece vertical hook with spool-housing lifting device.
·Oversized, two-piece vertical hook with spool-housing lifting device.
·A safety coupling prevents the hook from being displaced or damaged if the thread
jams in the hook track.
2. Designated use
The designated use of the 767 sewing machine is sewing light to medium-heavy
materials. Such material is generally made of textile fibres, but it may also be leather. It
is used in the clothing industry and for domestic and motor-vehicle upholstery.
This sewing machine can also be used to produce so-called technical seams. In this
case, however, the operator must assess the possible dangers which may arise (with
which DÜRKOPP ADLER AG would be happy to assist), since such applications are on
the one hand relatively unusual and, on the other, they are so varied that no single set
of criteria can cover them all. The outcome of this assessment may require appropriate
safety measures to be taken.
Generally only dry material may be sewn with this machine. The material may be no
thicker than 10 mm when compressed by the lowered sewing feet. The material may not
contain any hard objects, since if it does the machine may not be operated without an
eye-protection device. No such device is currently available.
The seam is generally produced with textile-fibre sewing thread of gauge 11/3 NeB(cotton),
11/3 Nm (synthetic) or 11/4 Nm (covering yarn). Before using any other thread the possible
dangers arising must be assessed and appropriate safety measures taken if necessary.
This sewing machine may be set up and operated only in dry, well-maintained premises.
If the sewing machine is used in other premises which are not dry and well-maintained it
may be necessary to take further precautions (which should be agreed in advance - see
EN 60204-31: 1999).
As manufacturers of industrial machinery we proceed on the assumption that personnel
who work on our products will have received training at least sufficient to acquaint them
with all normal operations and with any hazards which these may involve.
5
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3. Subclasses
The following table lists the features of the various subclasses.
Subclass Material Double- Hook Thread Edge Edger
Needle Left Trimmer Cutter
Legend: M = medium-heavy material / x = standard / - = not available
3.1 Optional equipment
The following optional equipment can be supplied for the 767:
RAP 13-2 *) Electro-pneumatic stitch locking and sewing-foot lift, pedal-operated.
RAP 13-4 Electro-pneumatic stitch locking and sewing-foot lift, pedal-operated.
RAP 13-6 **) Electro-pneumatic stitch locking and sewing-foot lift, pedal-operated.
RAP 13-6 ****)Electro-pneumatic stitch locking and sewing-foot lift, pedal-operated.
RAP 13-7 ***) Electro-pneumatic stitch locking and sewing-foot lift, pedal-operated.
FLP 13-2 Electro-pneumatic sewing-foot lift, pedal-operated.
NK 13-1 Pneumatic needle cooling, pedal-operated.
NP 13-4 Electro-pneumatic needle-retraction device for maximum clearance
beneath sewing feet when lifted.
HP 13-7****) Electro-pneumatic rapid stroke adjustment by knee switch.
SP 470 Roller feed device, with adjustable upper and lower conveyor rollers.
WTA 13-2 Automatic lowering for upper conveyor roller.
LR 13-4 Light barrier for automatic triggering of RAP at end of thread.
KNS 2 Knee switch for triggering manual reverse sewing.
WE 3 Maintenance unit.
WE 6 Maintenance unit for pneumatic optional equipment.
RFW 13-3 Residual-thread monitor bobbin thread.
RFW 13-8 Residual-thread monitor bobbin thread (KFA).
RFW 13-9 Residual-thread monitor bobbin thread (oversized hook).
STLS 13-2 2nd Stitch length.
FS 13-1 Additional tension.
N800 005611 Seam center guide.
*) **) ***) ****) = Integrated for the subclasses
6
-73 M - - - - -
-AE-73 M - x - x x
-AE-5-73 M - x - x x
-FA-73 M - - x - -
-LG-73 M - x - - x
- FA - 273 M x - x - -
- FA S - 473 ***) M x - x - -
- 373 M - - - - -
- FA - 373 *) M - - x - -
-KFA-373**) M - - x - -
- KFA - 573 ****) M - - x - -
- FAS - 373 ***) M - - x - -
- FAS - 573 ***) M - - x - -
- VF - 373 M - x x x -
- VF - 573 M - x x x -

4. Technical data
Rated voltage: 3 ~ 400 V, 50 Hz
1 ~ 230 V, 50/60 Hz
Dimensions: (H x W x D) 1570 x 500 x 1050 mm
Weight: approx. 56 kg (machine head only)
Working height: 790 mm (ex works)
Noise: work-place-related emission value
in accordance with DIN 45635-48-A-1-KL2
767 - FA - 373 Lc = 83 dB (A)
stitch length: 5 mm sewing-foot stroke: 1.5 mm stitch rate: 3 000 min-1
material: G1 DIN 23328 4-layer
767 - FA - 373 Lc = 83 dB (A)
stitch length: 7.2 mm sewing-foot stroke: 5.6 mm stitch rate: 2 000min-1
material: 2-ply Skai 1.6 mm 900 g/m2DIN 53352
767 - FAS - 473 Lc = 85 dB (A)
767 - FA - 273 stitch length: 5 mm sewing-foot stroke: 1.6 mm stitch rate: 2 700 min-1
needle distance: 8 mm
material: G1 DIN 23328 3-layer
767 - FAS - 473 Lc = 84 dB (A)
767 - FA - 273 stitch length: 6 mm sewing-foot stroke: 5.6 mm stitch rate: 2 000 min-1
needle distance: 8 mm
material: 2-ply Skai 1.6 mm 900 g/m2DIN 53352
767 - LG - 73 Lc = 83 dB (A)
stitch length: 6 mm sewing-foot stroke: 3.5 mm stitch rate: 2 800 min-1
material: upholstery fabric faced both sides 435 g/m2
767 - VF - 573 Lc = 85 dB (A)
767 - VF - 373 stitch length: 6 mm sewing-foot stroke: 3.5 mm stitch rate: 2 800 min-1
material: upholstery fabric faced both sides 435 g/m2
767 - AE - 5 - 73 Lc = 84 dB (A)
767 - AE - 73 stitch length: 6 mm sewing-foot stroke: 3.5 mm stitch rate: 2 800 min-1
material: upholstery fabric faced both sides 435 g/m2
767 - FAS - 373 Lc = 83 dB (A)
stitch length: 5 mm sewing-foot stroke: 1.5mm stitch rate: 3 000 min-1
material: G1 DIN 23328 4-layer
767 - FAS - 373 Lc = 83 dB (A)
stitch length: 7.2mm sewing-foot stroke: 5.6mm stitch rate: 2 000min-1
material: 2-ply Skai 1.6 mm 900 g/m2DIN 53352
767 - FAS - 573 Lc = 83 dB (A)
stitch length: 5 mm sewing-foot stroke: 1.6 mm stitch rate: 2 500 min-1
material: G1 DIN 23328 4-layer
767 - FAS - 573 Lc = 80 dB (A)
stitch length: 7.2mm sewing-foot stroke: 5.6mm stitch rate: 1500 min-1
material: 2-ply Skai 1.6 mm 900 g/m2DIN 53352
767 - KFA - 373 Lc = 83 dB (A)
- 573 stitch length: 5 mm sewing-foot stroke: 1.6 mm stitch rate: 2 500 min-1
material: G1 DIN 23328 4-layer
767 - KFA - 373 Lc = 80 dB (A)
- 573 stitch length: 7.2mm sewing-foot stroke: 5.6mm/ stitch rate: 1 500 min-1
material: 2-ply Skai 1.6 mm 900 g/m2DIN 53352
7
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4.1 Subclass technical data
Subclass 767
stitch rate:
-max. [min
-1]
-exworks [min
-1]
stitch length:
- forwards [mm]
- backwards [mm]
stroke height of alter-
nating sewing feet:
- max. [mm]
- ex works [mm]
needle system:
needle thickness:
(depending on E no.)
sewing-thread thicknesses:
a) cotton [NeB]
b) synthetic
sewing yarn [Nm]
c) covering yarn [Nm]
max. spool
capacity with
synthetic yarn ca. [m]
needle width/needle distance
(depending on sewing device
and E no.) [mm]
max. clearance
beneath sewing feet:
- sewing [mm]
- lifted [mm]
handwheel belt groove
central Ø [mm]
operating pressure [bar]
air consumption [NL]
8
-73 -FA- 73 -FAS-473 -FA-273 -LG-73
-373 -FA-373
3200 3500 3200 3500 3200
3200 3200 3200 3200 3000
99999
99999
77777
1-6 1-6 1-6 1-6 1-6
134-35 134-35 134-35 134-35 134-35
110-140 110-140 90-110 90-110 110-140
110-140 110-140 110-140
24 / 3 24 / 3 24 / 3 24 / 3 24 / 3
30 / 3 30 / 3 30 / 3 30 / 3 30 / 3
30 / 3 30 / 3 30 / 3 30 / 3 30 / 3
35 35 56 35 35
- - 4-30 4 - 36 -
10 10 10 10 10
16 9 (16) 9 (16) 9 (16) 13
80 80 80 80 80
66666
0,7 0,7 0,7 0,7 0,7

Subclass
stitch rate:
-max. [min
-1]
-exworks [min
-1]
stitch length:
- forwards [mm]
- backwards [mm]
stroke height of alter-
nating sewing feet:
- max. [mm]
- ex works [mm]
needle system:
needle thickness: [Nm]
(depending on E no.)
thread thicknesses:
a) cotton [NeB]
b) synthetic
sewing yarn [Nm]
c) covering yarn [Nm]
max. spool
capacity with
synthetic yarn ca. [m]
needle width/needle distance
(depending on sewing device
and E no.) [mm]
max. clearance
beneath sewing feet:
- sewing [mm]
- lifted [mm]
handwheel belt groove
central Ø [mm]
operating pressure [bar]
air consumption [NL]
9
GB
-VF-573 -AE-5-73 -KFA-373 -FAS-373 -FAS-573
-VF-373 -AE-73 -573
3000 2800 3500 3500 3200
2800 2800 3200 3200 3200
99999
99999
77777
1-6 1,6-7 1,5-6 1-6 1-6
134-35 134-35 134-35 134-35 134 - 35
110-140 110-140 110-140 110-140 110-140
24 / 3 24 / 3 24 / 3 24 / 3 24 / 3
30 / 3 30 / 3 30 / 3 30 / 3 30 / 3
30 / 3 30 / 3 30 / 3 30 / 3 30 / 3
35 35 35 35 56
-----
10 10 10 10 10
9 (16) 13 9 (15) 9 (16) 9 (16)
80 80 80 80 80
66666
0,7 0,7 0,7 0,7 0,7

5. Operation
5.1 Upper thread
Caution! Danger of injury!
Turn off main switch!
The upper thread may only be threaded with the sewing
machine switched off.
Threading upper thread (needle thread)
–Place the thread spool on its column and pass the thread through the guide eyelets
of the take-up arm.
–Pass the thread through guide 7 and anti-clockwise round pre-tensioner 8. Pass
thread once more through guide 7.
–Pass the thread round guide 11 and anti-clockwise round main tensioner 10. Pass
the thread clockwise round main tensioner 12.
10
7
8
9
10
11
12
1
2
3
4
5
6
14
15
+
-
13

–Pass the thread clockwise round tension unit 4, past thread-tensioning spring 3 and
through guide 2.
–Pass the thread through thread lever 1 and through guides 2, 5 and 6.
–Pass the thread through the needle, pull a few centimetres of thread through and
cutitoff.
Threading the upper thread (2-needle machines)
Sewing machines with 2 needles are threaded similarly to single-needle machines.
The differences can be seen in the illustration.
The thread-tensioning unit 13 is a double unit and can thus be used on both 1 and
2-needle machines.
Adjusting the upper-thread tensioner
Tension should be as low as possible. The cross-over point should be in the centre of
the material.
–Adjusting the pre-tensioner 8.
The pre-tension should be set lower than the main tension.
–Adjusting main tensioner (10 and 12).
Raising the upper-thread tensioner
The upper-thread tensioner is automatically raised when the thread is severed.
–Press knob 9.
Die upper-thread tensioner remains in the raised position for as long as the knob is
held down.
5.2 Adjusting the thread regulator
The thread regulator 14 regulates the amount of needle thread necessary for stitch
formation.
The setting depends on the following factors: - material thickness
- yarn characteristics
- stitch length
A properly-adjusted thread regulator ensures an ideal sewing result at a minimum
needle-thread tension.
At the correct setting the needle-thread loop must slide at low tension over the thickest
point of the shuttle.
Caution - danger of injury!
Turn off the main switch. The thread regulator may only be
adjusted with the sewing machine switched off.
–Undo both screws 15.
–Move the thread regulator 14.
The thread regulator is fitted with slots for this purpose.
Moving in the “+” direction increases the quantity of needle thread.
Moving in the “-” direction reduces the quantity of needle thread.
–Tighten screws 15.
11
GB

12
1
2
3
4
5
6
7
891011

5.3 Lower thread
Look out! Danger of injury!
Turn off main switch!
The lower thread may only be threaded with the sewing
machine switched off.
Threading the lower thread (hook thread)
–Place the thread spool on its column.
–Pass the lower thread through the thread guide on the take-up arm and alternately
through the guide of the pre-tensioner 1.
–Pass the thread anti-clockwise round tensioner 1 and once more through the thread
guide.
–Carefully wind a few turns of thread anti-clockwise onto the spool by hand and
place the spool on its column.
–Swivel the bobbin winder 4 against the empty spool.
The thread is wound onto the spool during sewing.
When spool 3 is full, winding-on is halted by the bobbin-winder lever 4.
–Adjusting tension 1.
The thread should be wound on at minimum tension.
Threading the lower thread
–Raise flap 5 and remove the empty spool with a magnet or tweezers.
–Insert spool 6 in such a way that when the thread is unwound from it moves in the
opposite direction to the hook.
–Pass the thread through slit 7 and below spring 10.
–Pass the thread through slit 8 and pull about 3 cm through.
–Close flap 5 and pass the thread through the flap’s guide 9.
Adjusting the lower-thread tension
The lower-thread tension should be set in accordance with the type of seam required.
Adjust the tension with screw 11.
Fig. a: correct thread interlacing in the centre of
the material
Fig. b: needle-thread tension too low
or looper-thread tension too great
Fig. c: needle-thread tension too great
or looper-thread tension too low
13
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14
12
3

5.4 Changing the needle
Look out! Danger of injury!
Turn off main switch!
The needle may only be threaded with the sewing machine
switched off.
–Turn the handwheel until the needle bar has reached its uppermost position.
–Undo screw 1.
–Remove needle.
–Insert the new needle with its throat towards the hook and push it up as far as it will
go.
–Tighten screw 1.
IMPORTANT !
If a needle of a different thickness is fitted the settings must
be altered as specified in the service manual.
Otherwise a thinner needle may cause missed stitches or damage to the thread, while a
thicker needle may damage the tip of the hook or the needle itself.
5.5 Lifting sewing feet
Depending on the machine version the sewing feet can be raised mechanically or
pneumatically.
Mechanical
–Operate knee lever 2.
Pneumatic (FLP or RAP required)
–Pull pedal half-way back.
5.6 Securing the sewing feet
Once they have been raised, either mechanically or pneumatically, the sewing feet can
be secured in the raised position with lever 3.
–Swivel lever 3 downwards.
The sewing feet are secured in the raised position.
–Swivel lever 3 upwards.
They are now released.
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GB

16
1
2

5.7 Sewing-foot stroke
The height of the sewing-foot stroke is set with adjusting wheel 1.
Machines without FA (without Thread Trimmer)
On these machines the speed of rotation is not checked.
Please comply with the note and table below.
Machines with FA (with Thread Trimmer)
The sewing-foot stroke and stitch rate are interdependent. A potentiometer is linked
mechanically with the adjusting wheel 1. By means of this potentiometer the control unit
detects which foot-stroke has been set and restricts the speed accordingly.
Machines with HP 13 - 7 (Speedomat)
The maximum stroke can be activated while sewing is in progress with the knee switch 2.
Like machines with FA, these machines also have a potentiometer.
Adjusting the sewing-foot stroke
–Set adjusting wheel 1. Min. , A , B , C , D , E , F , max.
min. = minimum stroke
max. = maximum stroke
NOTE
In order to ensure maximum durability and safety in operation, the maximum stitch rates
given in the table below should not be exceeded.
Stitch-length range Adjusting Subclass Max. stitch rate
mm wheel item stitches/min
(mm foot stroke)
0 - 6 min. - B -VF-373 / VF-573 3 000
(up to 2 mm) -AE-73 / AE-5-73 2 800
-FAS-473 3 200
-FAS-573 3 200
-all others 3 200 (3 500) 1)
C - D -VF-373 / VF-573 2 500
(2 - 5 mm) -AE 73 / VF-5-73 2 300
-all others 2 700 (3 000) 1)
E - max all 2 000
(5 - 7 mm)
6 - 9 min - max all 2 000
(1 - 7 mm)
1) On machines with the speedomat HP 13 - 7 the stitch rate may be increased by
about 300 stitches/min to the figures in brackets.
The HP 13 - 7 is described in detail on page 36.
17
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5.8 Sewing-foot pressure
The required sewing-foot pressure is set with rotary knob 1.
–to increase sewing-foot pressure = turn knob 1 clockwise
to decrease sewing-foot pressure = turn knob 1 anti-clockwise.
5.9 Stitch length
The required stitch length is set with rotary knob 2.
–to increase stitch length = turn knob 2 clockwise
to decrease stitch length = turn knob 2 anti-clockwise.
5.9.1 2nd Stitch length
The following subclasses are equipped with the 2nd stitch length: 767-FAS-373-RAP-HP,
767-FAS-573-RAP-HP, 767-KFA-373-RAP-HP, 767-KFA-573-RAP-HP,
767-FAS-473-RAP-HP. Thus it is possible to activate the 2nd stitch length through one
switch.
Use the setting wheels 3 and 5 to set both stitch length.
–Set the longer stitch length with the upper setting wheel 3.
–Set the shorter stitch length with the lower setting wheel 5.
Altering the shorter stitch length will be easier if the longer stitch length is activated
(LED 7 on) beforehand.
Attention !
The stitch length adjusted at the lower setting wheel 5 must never be greater than that
adjusted at the upper setting wheel 3.
–With the switch 4 you can change over from one stitch length to the other. When
the LED 7 is on, the longer stitch length is active. When the LED 3 is off, the
shorter stitch length is active.
18
14 2 3 5

6. Keys on sewing arm
Key Function
key 1 = Intermediate lock-stitches during sewing
key 2 = Raises or lowers needle
key 3 = Suppress starting or finishing lock-stitches
key 4 = Stitch length
LED Display
LED 5 = Sewing motor switched on
LED 6 = Lock-stitches suppression switched on
LED 7 = Stitch length
–Press and hold down key 1.
Intermediate lock-stitches are sewn. The machine sews backwards for as long as
the key is held down.
–Press key 2.
The needle is raised or lowered.
–Press key 3.
The next starting or finishing lock-stitches are not sewn.
–Press key 4.
The 2nd stitch length is activated.
If the 2nd stitch length has already been activated then pressing key 4 reactivates
the 1st stitch length.
19
GB
1234
567
123(4)
56(7)

7. Control unit and operating panel
IMPORTANT !
This manual covers only those key functions and parameter
changes available to the operator.
For a more detailed description of the control unit please
consult the motor manufacturer’s current Operating manual
(supplied).
The operating panel is used to program the control unit and to set seam functions.
Depending on the nature of the job, sewing may be executed manually or by seam
programming.
For various sewing tasks seams can be programmed for which the functions (starting
and finishing lock-stitches, stitch counting etc.) and parameter values (number of
stitches, seam length, speed of rotation etc.).
Entry is carried out in programming mode.
The parameters and the values assigned are displayed.
The seam programs are not lost even if the sewing machine is switched off (battery
buffer).
In order to avoid the inadvertent alteration of pre-set functions operation is divided into
several levels (operator, technician, fitter).
The operator (seamstress) can program it directly.
On the other levels access is contingent on the entry of a code number.
RESET
If the control unit is hopelessly misadjusted, this function allows the technician to reset
all adjusted values to their default (ex-works) setting.
This function is described in the Installation Instructions.
20