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869

Spezialnähmaschine

Betriebsanleitung

Instruction manual

Postfach 17 03 51, D-33703 Bielefeld • Potsdamer Straße 190, D-33719 Bielefeld

Telefon +49 (0) 521 / 9 25-00 • Telefax +49 ( 0) 521 / 9 25 24 35 • www.duerkopp-adler.com

Ausgabe / Edition: Änderungsindex Teile-Nr./Part.-No.:

03/2009 Rev. index: 00.0 Printed in Federal Republic of Germany 0791 869741

Eigentum der Dürkopp Adler AG und urheberrechtlich geschützt. Jede, auch auszugsweise Wiederverwendung

dieser Inhalte ist ohne vorheriges schriftliches Einverständnis der Dürkopp Adler AG verboten.

Property of Dürkopp Adler AG and copyrighted. Reproduction or publication of the content in any manner, even

in extracts, without prior written permission of Dürkopp Adler AG, is prohibited.

Dürkopp Adler AG - 2009

Foreword

This instruction manual is intended to help the user to become familiar

with the machine and take advantage of its application possibilities in

accordance with the recommendations.

The instruction manual contains important information on how to

operate the machine securely, properly and economically. Observation

of the instructions eliminates danger, reduces costs for repair and

down-times, and increases the reliability and life of the machine.

The instruction manual is intended to complement existing national

accident prevention and environment protection regulations.

The instruction manual must always be available at the machine/sewing

unit.

The instruction manual must be read and applied by any person that is

authorized to work on the machine/sewing unit. This means:

– Operation, including equipping, troubleshooting during the work

cycle, removing of fabric waste,

– Service (maintenance, inspection, repair) and/or

– Transport.

The user also has to assure that only authorized personnel work on the

machine.

The user is obliged to check the machine at least once per shift for

apparent damages and to immediatly report any changes (including the

performance in service), which impair the safety.

The user company must ensure that the machine is only operated in

perfect working order.

Never remove or disable any safety devices.

If safety devices need to be removed for equipping, repairing or

maintaining, the safety devices must be remounted directly after

completion of the maintenance and repair work.

Unauthorized modification of the machine rules out liability of the

manufacturer for damage resulting from this.

Observe all safety and danger recommendations on the machine/unit!

The yellow-and-black striped surfaces designate permanend danger

areas, eg danger of squashing, cutting, shearing or collision.

Besides the recommendations in this instruction manual also observe

the general safety and accident prevention regulations!

General safety instructions

The non-observance of the following safety instructions can cause

bodily injuries or damages to the machine.

1. The machine must only be commissioned in full knowledge of the

instruction book and operated by persons with appropriate training.

2. Before putting into service also read the safety rules and

instructions of the motor supplier.

3. The machine must be used only for the purpose intended. Use of

the machine without the safety devices is not permitted. Observe all

the relevant safety regulations.

4. When gauge parts are exchanged (e.g. needle, presser foot, needle

plate, feed dog and bobbin) when threading, when the workplace is

left, and during service work, the machine must be disconnected

from the mains by switching off the master switch or disconnecting

the mains plug.

5. Daily servicing work must be carried out only by appropriately

trained persons.

6. Repairs, conversion and special maintenance work must only be

carried out by technicians or persons with appropriate training.

7. For service or repair work on pneumatic systems, disconnect the

machine from the compressed air supply system (max. 7-10 bar).

Before disconnecting, reduce the pressure of the maintenance unit.

Exceptions to this are only adjustments and functions checks made

by appropriately trained technicians.

8. Work on the electrical equipment must be carried out only by

electricians or appropriately trained persons.

9. Work on parts and systems under electric current is not permitted,

except as specified in regulations DIN VDE 0105.

10. Conversion or changes to the machine must be authorized by us

and made only in adherence to all safety regulations.

11. For repairs, only replacement parts approved by us must be used.

12. Commissioning of the sewing head is prohibited until such time as

the entire sewing unit is found to comply with EC directives.

13. The line cord should be equipped with a country-specific mains

plug. This work must be carried out by appropriately trained

technicians (see paragraph 8).

It is absolutely necessary to respect the safety

instructions marked by these signs.

Danger of bodily injuries !

Please note also the general safety instructions.

Contents Page:

Preface and General Safety Instructions

Part 1: Operating Instructions Class 869

(Edition 03/2009)

1. Product Description ............................................ 4

2. Designated Use ............................................... 4

3. Subclasses .................................................. 5

4. Optional Equipment ............................................ 6

5. Technical data

5.1 Technicaldatasubclasses ......................................... 8

6. Operation

6.1 Threading the needle thread ........................................ 10

6.2 Adjusting the needle-thread tension ................................... 11

6.2.1 Function of the main thread tension and the supplementary thread tension in relation to the

sewing foot lifting for subclass 869- ... .................................. 12

6.2.2 Function of supplementary thread tension in relation to the sewing foot lifting and the

Speedomat for subclass 869- ... ..................................... 13

6.3 Opening the thread tension ......................................... 13

6.4 Turning the supplementary thread tension on and off for Subclasses

869-180020, 869-280020, 869-180122 and 869-280122 ....................... 14

6.5 Adjusting the thread regulator ....................................... 15

6.6 Winding on the hook thread ......................................... 16

6.7 Changing the hook-thread bobbin ..................................... 17

6.8 Setting the hook thread tension ...................................... 18

6.9 Inserting and changing the needle with single-needle machines .................. 19

6.10 Inserting and changing the needle w ith double-needle machines .................. 20

6.11 Liftingthesewingfoot............................................ 21

6.12 Lockingthesewingfeetinliftedposition................................. 22

6.13 Sewingfootpressure ............................................ 22

6.14 Sewing-footstroke.............................................. 23

6.15 Setting the stitch length ........................................... 25

6.16 Keypadonthemachinearm........................................ 26

7. Sew ing

7.1 SewingwithmachinesusingtheFIRclutchpositioningdrive .................... 27

7.2 Sewing with machines using the Efka DC1550/DA321G positioning drive ............ 28

Contents Page:

8. Tilting Back the Machine Head ..................................... 31

9. Folding Dow n the Table Top w ith the MG 56-2 Stand ....................... 32

10. Maintenance

10.1 Cleaning and Checking ........................................... 33

10.2 Oil Lubrication ................................................. 35

1. Product Description

The DÜRKOPP ADLER 869 is a single-needle double lockstitch

free-arm sewing machine with a lower feed, a needle feed and an

alternating foot-upper feed.

Depending on the subclass it comes as single or double needle

machine, with or without electropneumatic driven thread trimmer.

The machines are equipped with a large horizontal hook.

With a maximum of 20 mm fabric clearance when sewing feet are

lifted.

The residual thread length after thread trimming is about 15 mm.

A safety clutch prevents a changing of the hook setting or a hook

damage in the case of a thread deflection into the shuttle track.

Automatic wick lubricating with an inspection glass on the arm for

machine and hook lubrication.

All Subclasses, excluding those classes without thread trimmer

device, are equipped with a keypad (6 k eys). An additional key,

within reach of the seamstress, can optionally also be assigned

one of the six different functions.

Integrated bobbin winder

2. Designated use

The class 869 is a sewing machine head designed for s ewing light to

medium-heavy material. 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 special 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 w hich DÜRKOPP ADLER AG

would be happy to assist), since such applications are on the one hand

relatively unusual and, on the other, 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 sewing machine

head. 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 eye-protection device is currently

available.

The seam is generally produced with textile-fibre sewing thread of

gauge up to 10/3 NeB (cotton), 10/3 Nm (synthetic) or 10/4 Nm

(covering yarn).

Before using any other thread the possible dangers arising must be

assessed and appropriate safety measures taken if necessary.

This special sewing machine may be s et up and operated only in dry,

well-maintained premises. If the sewing machine is used in 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 sewing machines 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.

3. Subclasses

869-180020 Single-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed.

869-180122 Single-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed, electro-pneumatic thread trimmer,

electro-pneumatic seam bartacking and sewing foot

lifting. With large hook.

869-180322 Single-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed, electro-pneumatic rapid stroke

adjustment, electro-pneumatic thread trimmer,

connectable thread tension, electro-pneumatic seam

bartacking, electro-pneumatic second stitch length

and sewing foot lifting. With large hook and

integrated sewing light.

869-280020 Double-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed.

869-280122 Double-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed, electro-pneumatic thread trimmer,

electro-pneumatic seam bartacking and sewing foot

lifting. With large hook.

869-280322 Double-needle double lockstitch free-arm sewing

machine with lower feed, needle feed and alternating

foot upper feed, electro-pneumatic rapid stroke

adjustment, electro-pneumatic thread trimmer,

connectable thread tension, electro-pneumatic seam

bartacking, electro-pneumatic second stitch length

and sewing foot lifting. With large hook and

integrated sewing light.

4. Optional Equipment

The following optional equipment is available for the 869.

Order No. Optional equipment Subclasses

869-180020

869-180122

869-180322

869-280020

869-280122

869-180322

9780 000108 WE-8 maintenance unit for pneumatic x x x x x x

optional equipment

0797 003031 Pneumatic connection package x x x x x x

For connection of stand with maintenance unit.

0867 490010 Operating panel angle bracket x o o x o o

9822 510001 Halogen sewing light for sewing machine head x x x x x x

9880 867100 Sewing light add-on kit x x x x x x

0798 500088 Sewing light transformer x x x x x x

9880 867103 Sewing light LED x x x x x x

9880 867102 Integrated sewing light x x o x x o

9850 001089 Power supply complete for integrated sewing light x x o x x o

and sewing light LED

9850 867001 PCB for oil monitoring x o x o

0867 590014 Electro-pneumatic needle cooler from the top x x

0867 590344 Mech. sewing foot lifting, with pedal x x

0867 590354 Pneumatic sewing foot lifting; for clutch pos. drive x x

0867 590364 Pneumatic sewing foot lifting; for DC 1550 x x

0867 590464 Manual seam tacking o x o o x o

N800 080004 Edge guide, swivelling (like Del Veccia) x x x x x x

9805 791113 USB memory key x x x x x x

for data transfer with the

Efka control unit DA321G.

Stands

MG55 400384 Stand set table top 1200x550 without cut-out x x x x x x

MG55 400394 Stand set table top 1200x550 with cut-out x x x x x x

MG56 400064 Stand set table top 1250x600 x x

divided, foldable, for clutch motors

MG56 400074 Stand set table top 1250x600 x x x x x x

divided, foldable, for DC 1550

o = Standard equipment

x = Optional equipment

Further available documents concerning the class 869:

0791 869801 Parts List

0791 869641 Service Instructions

5. Technical data

Noise: Workplace-related emission value in accordance with DIN 45635-48-A-1-KL2

869-180020 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

869-180122 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

869-180322 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

869-280020 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

869-280122 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

869-280322 LC = _dB (A)

Stitch length: _ mm Sewing-foot stroke: __ mm Speed: ___ min

-1

Material:

5.1 Technical data subclasses

Subclass

869-180020

869-180122

869-180322

869-280020

869-280122

869-180322

Type of stitch Lockstitch 301

Hook type

vertical, large

Number of needles 1 2

Needle system 134-35

Needle size max. (depending on E-No.) [Nm] 180

Max. thread thickness

Needle thread [Nm] 80/3 - 10/3

Hook thread [Nm] 100/3 - 10/3

Stitch length [mm]

Forwards 9

Reverse 9

Max. speed [min

-1

] 2800

Speed factory setting [min

-1

] 2800

Max. sewing-foot stroke [mm] 9

Height of the lifted sewing feet max. [mm] 20

Operating pressure [bar] 6

Air consumption per working cycle [NL] 0,7

Dimensions (L x B x H) [mm] 600/ 230/ 470 650/ 230/ 470

(with the Efka DC 1550 mounted) (600/ 300/ 470) (650/ 300/ 470)

Weight [kg] 52 53

(with the Efka DC 1550 mounted) (56) (57)

Rated voltage [V/Hz] Depending on the drive

package

Rated voltage (factory setting) [V/Hz] Depending on the drive

package

Rated power [kVA] Depending on the drive

package

Threading scheme single-needle machine

Threading scheme double-needle machine

6. Operation

6.1 Threading the needle thread

Caution: Risk of injury!

Turn off the main switch!

The needle thread may only be threaded with the sewing machine

switched off.

Threading in the needle thread w ith single-needle machines

–

Put the thread reel on the thread stand and lead the needle thread

through the unwinder arm. The unwinder arm must be in vertical position

above the thread reels.

–

Thread in the thread through threading guide 1 and 2.

–

Pass the thread clockwise around the pre-tensioner wheel 3.

–

Pass the thread counter-clockwise around the supplementary tensioner

wheel 4.

–

Pass the thread clockwise around the around the main tensioner

wheel 5.

–

Pull the thread underneath the thread take-up spring 8 and pass it

through the thread regulator 10 to the thread lever 11.

–

Pass the thread through the thread lever 11 and the threading guides 9, 7

and 6 on the needle bar.

–

Thread the thread into the needle eye.

Threading in the needle thread w ith double-needle machines

–

Put the thread reels on the thread stand and lead the needle thread and

hook thread through the unwinder arm. The unwinder arm must be in

vertical position above the thread reels.

Thread for the left needle (as w ith single-needle machines)

–

Thread in the thread through threading guide 1 and 2.

–

Pass the thread clockwise around the pre-tensioner wheel 3.

–

Pass the thread counter-clockwise around the supplementary tensioner

wheel 4.

–

Pass the thread clockwise around the around the main tensioner

wheel 5.

–

Pull the thread underneath the thread take-up spring 8 and pass it

through the thread regulator 10 to the thread lever 11.

–

Pass the thread through the thread lever 11 and the threading guides 9, 7

and 6 on the needle bar.

–

Thread the thread into the needle eye.

Thread for the right needle

–

Thread in the thread through threading guide 12 and 13.

–

Pass the thread clockwise around the pre-tensioner wheel 14.

–

Pass the thread counter-clockwise around the supplementary tensioner

wheel 15.

–

Pass the thread clockwise around the around the main tensioner

wheel 16.

–

Pull the thread underneath the thread take-up spring 19 and pass it

through the thread regulator 21 to the thread lever 22.

–

Pass the thread through the thread lever 22 and the threading guides 20,

18 and 17 on the needle bar.

–

Thread the thread into the needle eye of the right needle.

6.2 Adjusting the needle-thread tension

Pre-tension

When the main tensioner 2 and supplementary tensioner 3 are open,

the needle thread must be under slight residual tension. This residual

tension is produced by the pre-tensioner 1.

The pre-tensioner 1 simultaneously affects the length of the end of the

severed needle thread (the starting thread for the next seam).

–

Basic setting:

Turn knurled nut 4 until its front is flush with the bolt 5.

–

To shorten the starting thread:

Turn knurled nut 4 clockwise.

–

To lengthen the starting thread:

Turn knurled nut 4 counter-clockwise.

Main tension

The main tensioner 2 should be set to the minimum possible tension.

The interlacing of the threads must be in the center of the material.

With thin material excessive thread tension can cause unwanted

gathering and thread breakage.

–

Adjust the main tensioner 2 so that the stitches are uniform.

To increase tension - Turn the knurled nut clockwise

To decrease tension - Turn the knurled nut counter-clockwise

Supplementary tension

The supplementary tensioner 3 is used for rapid change in

needle-thread tension during operation (e.g. with thickened seams).

–

Set the supplementary tensioner 3 lower than the main tensioner 2.

321

Fig. A Correct thread interlacing in the center of the

material

Fig. B Needle-thread tension too weak

Hook-thread tension too strong

Fig. C Needle-thread tension too strong

Hook-thread tension too weak

6.2.1 Function of the main thread tension and the supplementary thread tension in relation to the sewing

foot lifting for subclass 869- ...

The thread supplementary tension can, at any time, be switched on or

off by actuating key 1 (see chapter 6.15) of the key pad. The parameter

F-299 must be set on “1" for this to w ork.

Sew ing foot lifting Sewing foot lifting

during seam after

thread trimming

Parameter Thread- Thread- Thread- Thread-

Setting main- supplement.- main supplement.

tension tension tension tension

F-196=0 0 0 0 0

F-196=1 1 1 0 0

F-196=2 0 0 1 1

F-196=3 1 1 1 1

1 = Thread tension opened mechanically

0 = Thread tension closed mechanically

If the supplementary thread tensioner is open, this condition will be

maintained when lifting the s ewing foot.

When switching the machine off, the last setting of the

supplementary thread tensioner will be maintained through the

mains connection.

6.2.2 Function of supplementary thread tension in relation to the sewing foot lifting and the Speedomat

for subclass 869- ...

The thread supplementary tension can, at any time, be switched on or

off by actuating key 1 (see chapter 6.14) of the key pad. The parameter

F-255 must be set on “7" for this to w ork.

Parameter Stroke adjustment max. Stroke adjustments

Setting via knee switch setting wheel

Reaching of the HP-speed

of parameter F-117

(Speedomat)

F-197 = 0 1 1

F-197 = 1 0 1

F-197 = 2 1 (*) 0

F-197 = 3 0 0

(*) If the stroke adjustment (max.) is switched on via the knee switch

and the HP-speed (from parameter F-117) is reached through the

“Speedomat”, then the s upplementary thread tensioner will be switched

on automatically.

0 = Supplementary thread tension closed mechanically

1 = Supplementary thread tension opened mechanically

If the supplementary thread tensioner is closed, this condition will

be maintained when adjusting the stroke.

When switching the machine off, the last setting of the

supplementary thread tensioner will be maintained through the

mains connection.

Basic setting of the control unit for the automatic stepped reduction of

the speed (Speedomat) through the setting wheel for the height of the

alternating feed stroke

Parameter 188

Step 01-21 Entire Speedomat range

Step 01-10 max. allowed speed, Parameter

F-111 = 3000 min

-1

Step 11-18 Linear stepwise reduction of the max. s peed

(Speedomat)

Step 19-21 max. allowed speed, Parameter

F-117 = 1.800 min

-1

6.3 Opening the thread tension

Subclasses

869-180020, 869-280020

When lifting the sewing feet with the knee lever, the main and

supplementary tensioners are automatically opened.

Subclasses

869-180122, 869-180322, 869-280122, 869-280322

The needle thread tension is automatically opened when trimming the

thread.

6.4 Turning the supplementary thread tension on and off for subclasses

869-180020, 869-280020, 869-180122 and 869-280122

The supplementary tension is being switched on and off with lever 1.

Sw itching on

–

Push the handle 2 of lever 1 to the left.

Sw itching off

–

Push the handle 2 of lever 1 to the right.

6.5 Adjusting the thread regulator

Caution: Risk of injury!

Turn off the main switch.

The thread regulator may only be adjusted w ith the sewing machine

switched off.

The thread regulator 1 controls the quantity of needle thread required

for stitch formation.

The thread regulator must be precisely adjusted for an optimum result.

At the correct setting the needle thread loop must be able slide with

low tension over the thickest point of the hook.

–

Loosen the screw 2.

–

Change the position of the thread regulator 1.

Thread regulator to the left = more thread

Thread regulator to the right = less thread

–

Fasten the screw 2.

Adjustment information:

If the maximum quantity of thread is required, the thread take-up

spring 3 must be pulled upwards about 0.5 mm from its lower end

position. This is the case when the needle-thread loop passes the

maximum hook diameter.

32 1

6.6 Winding on the hook thread

–

Put the thread reel on the thread stand and lead the needle thread

through the unwinder arm.

–

Pull the thread through the thread guide 3, the tensioner 5 and the thread

guide 3.

–

Clamp the thread behind the blade 6 and tear it off.

–

Fit the bobbin 1 on the bobbin winder.

There is no need to wind the thread around the bobbin by hand.

–

Press the bobbin-winder lever 2 into the bobbin.

–

Sewing.

The bobbin-winder lever terminates the process as soon as the bobbin is

full.

The bobbin winder always stops in such a position that the blade 6 is in

the insertion position

(see right-hand illustration)

–

Remove the full bobbin 1, clamp the thread behind the blade 6 and tear it

off.

–

Fit empty bobbin on the bobbin winder for the next winding process and

press the bobbin-winder lever 2 into the bobbin.

Attention: Danger of breakage!

If the thread is not to be wound on during sewing, it is essential for the

sewing foot to be locked in the raised position and the sewing-foot

stroke set to the smallest value.

543 21

6.7 Changing the hook-thread bobbin

Caution: Risk of injury!

Turn off the main switch.

The hook-thread bobbin may only be changed with the machine

switched off.

Remove the empty bobbin

–

Slide the cover 1 sideways, raise up the flap 7 and remove the empty

bobbin 2.

Insert a full bobbin

–

Insert the bobbin 2 so that it moves in the opposite direction of the hook

when unwinding.

–

Pass the hook thread through the slit 3 and underneath the spring 4.

–

Pull the hook thread through the slit 6 and continue pulling until it stands

out about 3 cm.

–

Close the flap 7 and pull the hook thread through the thread guide 5 of

the flap.

6.8 Setting the hook thread tension

Caution: Risk of injury!

Turnthemainswitchoff!

The hook thread tension may only be adjusted with the sewing

machine switched off.

Setting the tension spring 2

–

Set the tension spring 2 by turning the adjustment screw 1.

Increase the hook thread tension =

Turn screw 1 clockwise

Decrease the hook thread tension =

Turn screw 1 counter-clockwise.

6.9 Inserting and changing the needle with single-needle machines

Caution: Risk of injury!

Turn off the main switch.

The needle may only be changed with the sewing machine switched

off.

–

Turn the hand wheel, until the needle bar 1 has reached its highest

position.

–

Loosen the screw 2.

–

Pull the needle downwards out of the needle bar 1.

–

Push in the new needle into the hole of the needle bar 1 until it stops.

ATTENTION!

The needle scarf 3 must point towards the hook.

–

Fasten the screw 2.

ATTENTION!

When changing to another needle s ize, the distance between hook

and needle must be readjusted (see s ervice instructions).

Ignoring the above mentioned hint can cause the following mistakes:

When inserting a thinner needle:

–

Missed stitches

Damage of the thread

When inserting a thicker needle:

–

Damage of the hook tip

Damage of the needle

6.10 Inserting and changing the needle with double-needle machines

Caution: Risk of injury!

Turnthemainswitchoff!

The needle may only be changed with the sewing machine switched

off.

–

Turn the hand wheel, until the needle bar 1 has reached its highest

position.

–

Loosen the screw 3.

–

Pull the needle downwards out of the needle holder 2.

–

Push in the new needle into the hole of the needle holder 2 until it stops.

ATTENTION!

Seen from the operator’s side, the needle scarf 4 of the right needle must

point to the right side and the needle scarf of the left needle point to the

left side (see drawing).

–

Fasten the screw 3.

ATTENTION!

When changing to another needle s ize, the distance between hook

and needle must be readjusted (see s ervice instructions).

Ignoring the above mentioned hint can cause the following mistakes:

When inserting a thinner needle:

–

Missed stitches

Damage of the thread

When inserting a thicker needle:

–

Damage of the hook tip

Damage of the needles

6.11 Lifting the sewing foot

Subclass

869-180020, 869-280020

The sewing feet can be lifted mechanically by actuating the knee

lever 1.

Subclasses

869-180112, 869-180322, 869-280122, 869-280322

The sewing feet can be lifted electro-pneumatically by actuating the

pedale 2 or the knee lever 1.

Mechanical sew ing foot lifting (Knee lever)

–

To adjust the position of the material (e.g. for corrective purposes), push

the knee lever 1 (optional) to the right.

The sewing foot remains in the raised position as long as pressure is

maintained on the knee lever 1.

Raising the sew ing foot electro-pneumatically (pedal)

–

Press the pedal 2 half-way back.

The sewing feet are raised with the machine at a halt.

–

Press the pedal 2 all the way back.

The thread trimmer is activated and the sewing foot raised.

6.12 Locking the sewing feet in lifted position

–

Push the lever 1 downwards.

The sewing feet are locked in lifted position.

–

Push the lever 1 upwards.

The sewing feet are released.

–

Lift the sewing feet pneumatically or by pushing the knee lever.

The lever 1 then moves back into its initial position.

6.13 Sewing foot pressure

The required sewing-foot pressure is set with the setting wheel 2.

ATTENTION!

The material must not “swim”.

Do not set a higher pressure than is necessary.

–

To increase the sewing-foot pressure = Turn the setting wheel 2

clockwise.

–

To decrease the sewing-foot pressure = Turn the setting wheel 2

counter-clockwise.

6.14 Sewing-foot stroke

The special sewing machine 869 has, depending on the subclass, as

standard equipment two setting wheels for the sewing foot stroke. With

the left setting wheel 2 the standard s ewing foot stroke from 1 to 9 mm

is selected.

With the right setting wheel 1 a n increased sewing foot stroke from 1 to

9 mm is selected.

–

Turning the setting wheel 1 and 2 (1 to 9)

1 = minimal sewing foot stroke

9 = maximal sewing foot stroke

Automatic limiting of the speed

Machines w ithout thread trimmer

With these machines the speed is not controlled

Please take into consideration the hint and the chart on the next side.

Machines w ith thread trimmer

The sewing-foot stroke and the speed are interdependent. A

potentiometer is linked mechanically with the adjusting wheel. By

means of this potentiometer the control unit detects what foot-stroke

has been set and restricts the speed of rotation accordingly.

Machines w ith electro-pneumatic rapid stroke adjustment

With fabric parts that are thicker or in order to sew over cross seams,

the increased sewing foot stroke (setting wheel 1) can be switched on

during the sewing process by actuating the knee switch 3 beneath the

table top.

As with the machines that are equipped with a thread trimmer, the

potentiometer is also available.

ATTENTION! Danger of breakage!

The standard sewing foot stroke that is set with the setting wheel 2

may never exceed the stroke set with the setting wheel 1.

Operation mode of the quick stroke adjustment

The activation period of the maximum sewing foot stroke depends on

the set operation mode. It is possible to choose between three

operation modes.

The individual operation modes are determined by the setting of the

parameters F-138 and F-184 at the control panel (see enclosed

instructions of the motor manufacturer).

Operation mode

Operation / Explanation

Keystroke

F-138 = 0

F-184 = 0

The maximum sewing foot stroke remains activated as

long as the knee switch 3 is actuated.

Push-lock

F-138 = 1

The maximum sewing foot stroke is activated by

actuating the knee switch 3.

By actuating the knee switch once again the maximum

sewing foot stroke is deactivated.

Keystroke

with lowest

speed

F-138 = 0

F-184 0 < 100

The maximum sewing foot stroke remains activated as

long as knee switch 3 is actuated.

After releasing the knee switch the machine sews with

the maximum sewing foot stroke until the set minimum

number of stitches is reached (parameter F-184).

Afterwards, the seam is continued with normal sewing

foot stroke.

Please note!

The switch 4 on the rear of the knee switch 3 can also be used to

switch between the “keystroke” and “push-lock” operation modes.

Hint!

In order to ensure an operation as safe as possible and a high

durability, the max. speed as shown in the chart should not been

exceeded.

Subclass Stitch length range Sew ing-foot stroke max. Speed

Setting w heel position [mm] [min

-1

]

869-180020 0-6 1-3 2800

869-180112 4 2500

869-180322 5 2100

869-280020 6-9 1800

869-280122

869-280322 1-4 2900

6-9 5 2100

6-9 1800

6.15 Setting the stitch length

The special sewing machine 869 has, depending on the subclass, as

standard equipment two s etting wheels. Thus, two different stitch

lengths can be sewn, that are activated by actuating the key 4 (see

chapter 6.15).

The two stitch lengths are s et with the setting wheels 1 and 2 on the

machine arm.

–

Set the higher stitch length with the upper setting wheel 1.

Setting 1 = min. stitch length

Setting 9 = max. stitch length

–

Set the smaller stitch length with the lower setting wheel 2.

Setting 1 = min. stitch length

Setting 9 = max. stitch length

The stitch length are the s ame for both, forward and backward sewing.

–

For the manual sewing of tacks, push the stitch regulator lever 3

downwards.

The machine sews backward as long as the stitch regulator lever 3 is

pressed down.

Please note:

In order to facilitate the setting of stitch lengths, the stitch length that

remains unchanged should be activated with key 2 (see chapter 6.15).

ATTENTION! Danger of breakage!

The stitch length set with the lower setting wheel 2 must not exceed

the stitch length set with the upper setting wheel 1.

321

6.16 Key pad on the machine arm

Key Function

Supplementary tread tension

Button is back-lit: the supplementary thread tension is

activated.

Button is not back-lit: the supplementary thread

tension is not activated.

2nd stitch length

Button is back-lit: long stitch length (upper setting

wheel) is activated

Button is not back-lit: small stitch length (lower setting

wheel) is activated

Recalling or suppressing the initial or final bartack.

If the initial and final bartacks are activated, then the

next bartack is deactivated when the button is

pressed.

If the initial and final bartacks are not activated, then

the next bartack is activated when the button is

pressed.

Move the needle to the upper or lower position.

The function of the button can be set with the

parameter F-242.

1 = needle up/down

2 = needle up

3=singlestitch

4 = full stitch

5 = needle to position 2

The factory setting is 1 (needle up/down).

Manually sewing backward.

The machine sews backwards for as long as the

button is held down.

654321

Key Function

LED display “Power On”

The function of key 7 can be selected with the screw 6 under the keys.

–

Selecting a function.

Example: 6 = Manually sewing backward.

–

Turn in the screw 6 under the key 5 and turn it 90° to the right (the slot

stands vertically).

The function can now be called via both keys 5 and 7.

ATTENTION!

Before key 7 can be programmed with a new function, the former

setting must be deactivated.

7. Sewing

7.1 Sewing with machines using the FIR clutch positioning drive

For a detailed description of the control unit, please c onsult the

enclosed current issue of the operating manual of the motor

manufacturer (see also www.efka.net).

With pedal

0Atrest

1 Sewing forwards with minimum speed

2 Sewing forwards with higher speed

:::

3 Sewing forwards with maximum speed

7.2 Sewing with machines using the Efka DC1550/DA321G positioning drive

The control unit DA321G contains all required operational interfaces

for switching functions and setting parameters.

It is possible to operate without an operating panel, but the seam

programming cannot be carried out.

The V810 and V820 operating panels can also be connected to the

control unit.

They are deliverable as optional equipment.Seam programming can be

performed with the V820 operating panel.

For a detailed description of the control unit, please c onsult the

enclosed current issue of the operating manual “Efka DC1550 -

DA321G” of the motor manufacturer (see also www.efka.net).

With pedal

The pedal position is detected using a sampling detector with 16

different levels.

Their meanings are listed in the table below:

Pedal position Pedal movement Meaning

-2 Completely backwards Command for cutting the thread (end of seam)

-1 Half backwards Command for raising the sewing foot

0 Rest position see remark below

1 Slightly forwards Command for lowering the sewing foot

2 More forwards Sew with miminal speed (first step)

3 More forwards Sew with more speed (second step)

:::

13 Entirely forwards Sew with maximal speed (12th step)

Remark

The following functions can be programmed to correspond with the rest

position:

–

Needle position (down/up) and sewing-foot position (down/up) when stop

in seam.

–

Sewing-foot position (up/down) after end of seam. (Pedal fully

backwards, then in rest position)

Sew ing process Operation / Explanation

Prior to sew ing

Starting position

Position material at seam start

- Pedal is in the r esting position.

The sewing machine is at rest.

The needle is up.

The sewing feet are down.

- Move pedal back halfway.

Raise the sewing feet.

- Push the material to the needle.

Sew ing

- Step the pedal forward and hold.

The machine then continues to sew with the speed

determined by the pedal.

In mid-seam

Interrupt the sewing process

Resume the sewing process

(after releasing the pedal)

- Release pedal (rest position).

The machine stops in the first position

(needle down).

The sewing feet are down.

- Step forward on the pedal.

The machine then continues to sew with the speed

determined by the pedal.

Sewing an intermediate bartack

- Press the stitch regulator lever 4 downwards.

The machine sews in reverse as long as the

stitch regulator lever is pressed.

The speed is determined by the pedal.

- Press the button 3.

321

Sewing over a cross seam.

(max. sewing foot stroke)

The maximum sewing-foot stroke is activated.

The speed is limited to 1600 min-1.

Operating modes for maximum sewing-foot stroke:

- Press the knee switch briefly for activating the maximum

sewing-foot stroke.

- Press the knee switch briefly again for deactivating the

maximum sewing-foot stroke.

Sewing the 2

stitch length

during sewing

(max. stitch length)

- Actuate key 2.

Increase the thread tension during

thesewingprocess

- Actuate key 1.

At the seam end

Remove the material

- Push the pedal all the way back and keep it pushed.

The final bartack is sewn (when activated).

The thread is cut.

The machine stops in the s econd position.

The needles are up (reverse rotation).

The sewing feet are up.

- Remove the material.

8. Tilting Back the Machine Head

Caution Crushing Hazard!

Do not reach between the base and the machine arm while tilting back

the machine head.

Tilting back the machine head

–

Pull lever 1 upwards.

The locking mechanism is then released.

–

Tilt the machine head 2 cautiously to the rear.

Re-closing the machine head

–

Tilt the machine head 2 forwards.

The head tilts back to the position shown in the illustration below.

–

Pull lever 1 upwards and cautiously tilt the head downwards.

Attention !

Only tilt the machine head up for a short period (for example for

maintenance work).

If the machine head is tilted back for a longer period ( for a night or

weekend), oil can leak out in the hook area.

9. Folding Down the Table Top with the MG 56-2 Stand

Caution: Risk of injury!

Always hold the table top with both hands when pulling it out.

–

Loosen the table top latch 1 located under the table top.

–

Pull out the table top 2 to the left and fold out.

–

Hook in the diagonal brace 4 to the bolts 3.

–

Fold down the table top

–

Follow these steps in the opposite order to raise the table top.

10. Maintenance

10.1 Cleaning and Checking

Caution: Risk of injury!

Turnthemainswitchoff!

Maintenance may only be carried out with the machine switched off!

Maintenance work must be carried out no less frequently than at the

intervals given in the tables (see “operating hours” column).

Maintenance intervals may need to be shorter when processing

heavy-shedding materials.

A clean machine is a trouble-free machine.

Maintenance w ork Explanation Operating

to be carried out hours

Machine head

- Remove lint, pieces of

thread

(e.g. with an air blow gun)

Places in special need of cleaning:

- area under the throat plate 2

- area around the hook 1

- bobbin housing

- thread trimmer

- needle area

Direct drive

Clean fan grille 3. (e.g. with

an air blow gun)

Remove lint and pieces of thread from

air-intake openings.

Maintenance w ork Explanation Operating

to be carried out hours

Sew ing motor

Clean fan grille 2.

(e.g. with an air blow gun)

Check condition and

tension of V-belt 1

Remove lint and pieces of thread from

air-intake openings.

It must be possible to depress the V-belt by

about 10 mm by pressing it with a finger at

its mid-point.

160

Pneumatic system

Check water level in

pressure regulator.

Clean filter

cartridge.

- Check the system for leaks.

The water level must not rise to the level of

the filter cartridge 3.

- After unscrewing the drain screw 5, the

water under pressure will flow out of

the water separator 4.

Dirt and condensation are separated out by

the filter cartridge 3.

- Disconnect the machine from the

compressed-air supply.

- Unscrew the drain screw 5.

Theremustbenopressureinthe

machine’s pneumatic system.

- Unscrew water separator 4.

- Unscrew filter cartridge 3.

Wash the filter shell and cartridge

with cleaning fluid (not solvent) and

blast clean.

- Re-assemble the maintenance unit.

500

10.2 Oil Lubrication

Caution: Risk of injury!

Oil can cause skin eruptions.

Avoid protracted contact with the skin.

In the event of contact, thoroughly wash the affected area.

ATTENTION!

The handling and disposal of mineral oils is subject to legal regulation.

Deliver used oil to an authorised collection point.

Protect your environment.

Take care not to spill oil.

To lubricate the special sewing machine use only DA-10 lubricating oil

or an equivalent oil of the following specification:

–

Viscosity at 40° C: 10 mm2/s

–

Flashpoint: 150° C

DA-10 is available from DÜRKOPP ADLER AG retail outlets under the

following part numbers:

250-ml container: 9047 000011

1-litre container: 9047 000012

2-litre container: 9047 000013

5-litre container: 9047 000014

Maintenance w ork Explanation Operating

to be carried out hours

Lubrication of the machine

head

The head is equipped with centralized oil wick

lubrication. The bearings are supplied by the

oil reservoir 1.

- The oil level must not drop

below the mark 3 on the oil reservoir.

The oil reservoir illuminates when the oil

level falls below the mark 3. (Only for

subclass 869-180322, 869-280322)

- Refill oil through the hole 2 until it reaches

the “Max” mark.

Durkopp Adler 869 Handleiding

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