Adler 768 Operating Instruction
Contents page:
Preface and general safety instructions
Part 1: Operat ing Manual, Class 76 8
1. Product description
2. Designated use
3. Subclasses
4. Ancillary equipment
5. Technical data
6. Operation
6.1 Threading the needle thread . . . . . . . . . . . . . . . . . . . . . . . . 9
6.2 Adjusting the need le-thread tension . . . . . . . . . . . . . . . . . . . 9
6.3 Opening the needle-thread t ensioners . . . . . . . . . . . . . . . . . . 9
6.4 Adjusting the thread regulator . . . . . . . . . . . . . . . . . . . . . . . 10
6.5 Winding on the looper th read . . . . . . . . . . . . . . . . . . . . . . . 11
6.6 Fitting the looper-thread b obbin . . . . . . . . . . . . . . . . . . . . . . 12
6.7 Adjusting the looper-t hread ten sio n . . . . . . . . . . . . . . . . . . . . 13
6.8 Fitting and changing the needle . . . . . . . . . . . . . . . . . . . . . . 14
6.9 Raising the sewing feet . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 0 Loc king the se wing feet in the up positi on . . . . . . . . . . . . . . . . 15
6.11 Adjusting the sewing-foot s troke . . . . . . . . . . . . . . . . . . . . . 16
6.11.1 Adjusting the sewing-foot s troke mechanically . . . . . . . . . . . . . . 16
6.11.2 Rapid el ectro-pneumatic stroke adjustmen t (HP) . . . . . . . . . . . . 17
6.12 Adjust ing the sewing-foot pressure . . . . . . . . . . . . . . . . . . . . 18
6.1 3 Adjusting the stitch length . . . . . . . . . . . . . . . . . . . . . . . . . 18
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7. Keypad on sewing-machine arm
7.1 Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ausg./Edition: 07/99
. . . . . . . . . . . . . . . . . . . . 19
Contents page:
8. Control and operating panel
8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.2 Operati ng-panel keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.3 Operati ng the V810 control u nit . . . . . . . . . . . . . . . . . . . . . 22
8.4 Changing parameter values . . . . . . . . . . . . . . . . . . . . . . . 23
8.5 Direct par ameter-number selection . . . . . . . . . . . . . . . . . . . 23
9. Sewing
10. Maintenance
10. 1 Cleaning and inspectio n . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11. Ancillary equipment
11.1 Seam-ce ntre guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
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1. Product description
The
DÜRKOPP ADLER 768
Two-needle double-lockstitch pillar sewing machine with underfeed, needle feed
•
and alternat i ng-foot overfeed
Robust design based on the pro ven modular system of the class 767.
•
Low-maintenance design (maintenance-free antifriction and s i ntering bearings ,
•
articulated thread lever with permanently-lubricated roller bearings)
Automatic non-pressurised recirculating lubrication with sight glasses for oil level
•
and circulation. Shuttle lubrication must be carried out manually.
Maximum space beneath raised sewing feet: 16 mm.
•
Stroke of alternating sewing feet adjustable by adjusting wheel on arm up to a
•
maximum of 7 mm.
Large vertical shuttle with bobbin-housing li f t.
•
A safety coupling on t h e lower toothed- belt wheel protect s the shuttle from being
•
displaced or damaged if the thread jams in the shuttle track.
Fitted as standard with pedal-operated electro-pneumatic sewing-foot lift.
•
Fitted as standard with electro-pneumatic rapid stroke-adjustment with automatic
•
stitch rat e l i mit, operated by knee switch or ergonomically-placed key on the
sewing-machi ne arm.
Automatic, infinitely-variable adjustment of stitch rates as a function of the stroke
height set.
is a special sewing machine with universal applications.
2. Designated use
The
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
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 m achine. The materi al m ay be no
thicker than 10 mm when compres sed by the lowered s ewing feet. The mat erial may not
contain any hard objects, sinc e i f it does the machi n e may not be operat ed without an
eye-protection device. No such device is currently availab l e.
The seam is generally produced with textile-fibre sewing thread of gauge 10/3 NeB
(cotton), 10/3 Nm (synthetic) or 10/4 Nm (coveri n g yarn). Before us i ng any other thre ad
the possible dangers arising must be assessed and appropriate saf ety measures take n
if necessary.
This special sewing machine may be set up and operated only in dry, well-maintained
premises. If t h e sewing machine i s used in other premi ses which are not d ry and
well-maintained it may be necessary to take further precautions (which should be
agreed in advance - see EN 60204-3-1: 1990).
As manufactu rers of industrial sewing machines we proceed on the ass umption 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.
is a special sewing machine designed for sew i ng heavy material . Such
768
DÜRKOPP ADLER AG
would be happy to assist), since such applications are on
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3. Subclasses
Class 768-274-FLP-HP:
Two-needle double-lockstitch pillar sewing machine with
underfeed, needle feed and alt ernating-foot overfeed
4. Ancillary equipment
order no. ancillary equipment
9822 510125 light-guide sewing lamp
9880 767001 sewing-lamp fitting set
9822 510001 WALDMANN sewing lamp (halogen)
0907 487519 sewing-lamp fitting set
0798 500088 230V sewing-light transformer
9781 000002 WE-6 filter controller
0797 003031 pneumatic connection set
No.depending tape guide
on tape width
with mains cable and rocker switch, for fitting to the
sewing-machine arm
for light-guide sewing lamp 9822 510125
with 12V/20W bul b for fitting to the sewing-machine ar m
for sewing lamp 9822 510001
with mains cable, no switch,
for sewing lamps 9822 510001 and 9822510125
For the pneumat i c connection of fram es with maintenance units and
pneumatic ancillary equipment. Consists of connection hose
(length 5 m, diameter 9 mm), hose nozzles, hose ties and
plug-and-socket connector.
with tape-roll holder
N800 005611 seam-centre guide
5. T e chnical dat a
Noise:
Lc = 85 dB (A)
stitch length: 9,6 mm
sewing-foot stroke: 1,5 mm
stitch rate: 1.400 min
material: 4-play Skai, 1,6 mm 900 g/m
Lc = 86 dB (A)
stitch length: 9,6
sewing-foot stroke: 5,6 mm
stitch rate: 1.400 min
material: 4-play Skai, 1,6 mm 900 g/m
6
workplace emission value (DIN 45635-48-A-1-KL2)
-1
-1
2
2
needle system: 134-35
needle thickne ss (depending on E No.):
- min. [Nm] 140
- max. [Nm] 200
- standard [Nm] 180
needle gap (depending on E No.):
- min. [mm] 8
- max. [mm] 14
max. sewing-thread thicknesses:
- cotton [NeB] 10/3
- synthetic thread [Nm] 10/3
- covering yarn [Nm] 10/3
bobbin capacit y:
- synthetic thread Nm 20/3: [m] approx. 22
- synthetic thread Nm 30/3: [m] approx. 35
max. stitch rate: [rpm] 2400
max. stitch length:
- forwards: [mm] 12
- backwards: [mm] 12
max. material thickness: [mm] 10
stroke height alternating sewing feet:
- max. [mm] 7
- ex works [mm] 1 - 6
feed stroke (above needle plate): [mm] 1.2
max. passage beneath sewing feet:
- lift [mm] 16
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operating pre ssure: [bar] 6
air consumpti on per working cycle (FLP and HP): [NL] approx. 0.2
sewing drive: [type] Efka DC1600/DA82GA
rated power: [kW] 0.75
rated voltage: 1 x 230 V, 50 / 60 Hz
frames: [type] MG55-3
dimensions (H x W x D): [mm] 1570 x 1060 x 600
working height (ex works): [mm] 950
weight:
- sewing-machine upper part [kg] approx. 56
- frames with sewing drive [kg] approx. 46
7
1
2
3
Fig. a:
Fig. b:
Fig. c:
8
correct thread loop in the cen tre of
the material
needle-threa d tension too low
or looper-thr ead tension too great
needle-threa d tension too great
or looper-thr ead tension too low
6. Operation
6.1 Threading the needle thread
Caution - danger of injury !
Turn off the main switch!
The needle thread may only be th readed with the se wing
machine switched off.
–
Thread the needle thread as shown in the illustration.
6.2 Adjusting the needle-thread tension
Pre-tensioners 1
The pre-tensio ners 1 should be set at a lower tension than the main tensione rs 3.
–
Adjust the pre-tensioners 1 by turning the knurled nuts.
–
After making m ajor changes to the pre-tensione rs 1, readjust the m ain tensioners 3 .
Main tensioners 3
The main tensioners 3 should be set to the minimum possible tension.
The looping of the threads must be in the centre of the material (see fig. a).
With thin material excessive thread tension can cause unwanted gathering a nd thread
breakage.
–
Adjust the main tensioner 2 so that the stitches are uniform.
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Supplementary tensioner 2
The supplementary tensioner 2 can be switched in to effect a rapid change in
needle-thread tension durin g operation (e.g. with thickened se ams, on the flap when
backstitching the front edge of a jacket or overcoat).
–
Set the supplementary tensioner 2 lower than the main tensioner.
–
The supplementary tensioner 2 i s s wi tched on during operation at the keypad on
the sewing-machine arm.
When the supplementary tensioner is switched on the LED over the r elevant key
lights up.
6.3 Opening the needle-thread tensioners
The main tensioners 3 and supplementary tensioner 2, if it is switched on, open
automatically:
–
when the sewing feet are lift ed electro-pneum atically (see section 6.9).
9
6.4 Adjusting the thread regulator
1
2
The thread regulator 1 regulates the amount o f needle thread necessary for stit ch
formation.
The setting depends on the following factors: - material thickness
A properly-adjusted thread regulator ensures an ideal sewing result at a minimum
needle-thread tension.
At the correct setting the ne edle-thread loop must slide at low t ension over the th i ck e st
point of the shuttle.
Caution - danger of injury!
Turn off the main switch.
The thread regulator may only be adjusted with t he sewing
machine switched off.
–
Undo both screws 2.
–
Move the thread regulator 1.
The thread regulator is fitted with slots for this purpose.
Moving in the
Moving in the
–
Tighten screws 2.
direction increases the quantity of needle thread
"+"
direction reduces the quantity of needle thread
"-"
-
+
- yarn characteristics
- stitch length
10
6.5 Winding on the looper thread
1 2
B
C
E
3
Caution - danger of injury !
Turn off the main switch.
The looper thread may be threaded for spooling only with
the sewing machine switched off.
The looper thread may be spooled only with the sewing
feet locked in the raised position.
–
If spooling i s t o take place when s ewing with no unde rl aid material:
lock the sewing feet in the raised position (see section 6.9).
–
Thread the looper thread as shown in the illustration.
–
Wind about 5 lo ops of the looper t hread anti-clockwise onto the bob bin core.
–
Place the bobbin on bobbin-winder shaft 2.
–
Swivel bobbin-winder lever 3 ag ai nst the bobbin.
–
Adjust tension 1.
The looper thr ead should be wound on with minimal tens i on.
–
Sew.
The bobbin-wi nder lever 3 terminat es the process as soon as the bobbin is full .
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