Duerkopp Adler N291 Manuale utente

Contents: Page:

Foreword and general safety instructions

Part 1: Operation manual Cl. N291

1. Product specifications

1.1 Use for the intended purpose . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2. Elements and their function

2.1 Elements at the machine head . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 Elements at the machine stand . . . . . . . . . . . . . . . . . . . . . . . 10

3. Operation of the sewing machine

3.1 Threading the needle thread . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Winding the bobbin thread . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3 Changing the bobbin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Setting the bobbin thread tension . . . . . . . . . . . . . . . . . . . . . . 12

4. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Contents: Page:

Part 2: Installation manual Cl. N291

1. General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. Assembling the machine stand . . . . . . . . . . . . . . . . . . . . . 6

3. Completing and screwing on the table top . . . . . . . . . . . . . . . 6

4. Connecting the sewing machine motor to the table top . . . . . . . 6

5. Mounting the machine head, positioning the V-belt and

fastening the pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6. Fastening the handwheel and synchronizer . . . . . . . . . . . . . . 8

7. Connecting the maintenance unit . . . . . . . . . . . . . . . . . . . . 8

8. Laying and connecting the electrical cables . . . . . . . . . . . . . . 8

9. Filling in the oil and readying the machine for service . . . . . . . . 8

10. Making a sewing test and checking the oil supply of the

mist lubricator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

The following patents and registered designs apply:

Status September 1992

DE 84 33 111

DE 26 16 738

DE 28 03 971

DE 28 15 297

DE 30 43 141

DE 32 15 408

ES 428 674

ES 458 540

ES 477 288

GB 1 530 873

IT 209 238

IT 1 017 437

IT 1 077 155

IT 1 077 924

IT 1 109 783

IT 1 140 081

IT 1 160 800

IT 1 194 222

JP 61-61041

JP 1 803 181

JP 1 174 491

JP 1 250 838

JP 1 256 078

JP 1 258 920

JP 1 339 944

KR 24 686

SU 664 575

TW 19 105

TW 31 498

TW 33 691

TW 20 190

TW 23 626

US 4 116 145

US 4 137 858

US 4 364 319

US 4 446 803

US 4 457 244

US 4 534 304

US 4 646 668

1. Product specifications

1.1 Use for the intended purpose

The sewing unit must only be used for sewing textile fibres and leather.

1.2 Technical data

Needle system:

depending on sewing equipment: 2134-35 DUKK

134 KK

Maximum number of stitches:

depending on sewing foot stroke

and stitch length: 2000, 3000, 4000 1/min

Maximum stitch length

forward (v), reverse (r)

N291-164 062: 6 (v); 6 (r) mm

N291 185 082: 10 (v), 8 (r) mm

Maximum sewing foot stroke: 7 mm

Operating pressure: 6 +/-0.5 bar

Line pressure: 7-10 bar

Air consumption per work cycle: 0.15 NL

Maximum clearance under the

sewing feet:

When sewing: 10 mm

When feet are lifted in needle

up position: 17 mm

Maximum bobbin capacity:

with a thread size of Nm 80/2: 95 m

Maximum thread size:

Cotton: 11/3 NeB

Synth. continuous: 11/3 Nm

Corespun thread (poly- cotton): 11/4 Nm

2. Elements and their function

2.1 Elements at the machine head

Element function

Screw 1 – This screw for the sewing foot pressure is turned in

completely at the factory.

Therefore, do not change its adjustment!

Thread guide 2 – Depending on the material thickness, sewing thread

and stitch length, the position of the thread guide

must be adjusted such that controlled guiding of the

needle thread around the hook is assured.

When it is set at "0" the largest amount of thread is

released, as is required for very long stitches and

very thick material.

Turning knob 3 – Setting the additional tension engageable with lever

5 at the desired value.

Lever 4 – Opening the needle thread main tension and needle

thread additional tension.

Lever 5 – Activating and deactivating the additional tension.

To do this, unlock the lever by pulling it to the right,

and then change over.

Dial 6 – Set the "higher" foot stroke that has been activated

with the corresponding key or knee switch.

Dial 7 – Set the "smaller" foot stroke.

Sight glass 8 with

inlet opening – Indicating the oil level in the reservoir. The oil level

must not drop below "MIN". If necessary, fill the oil

ESSO "SP NK 10" into the oil reservoir up to the

mark "MAX".

Turning knob 9 – Setting the reverse stitch length.

Turning knob 10 – Setting the forward stitch length.

Hand lever 11 – Changing the stitch length infinitely between the

adjusted forward and reverse stitch length.

Turning knob 12 – Setting the needle thread main tension at the

desired value.

Lever 13 – Determining whether the needle thread main tension

is opened or closed while the foot is lifted.

Lever up: Tension opened

Lever down: Tension closed

Needle 14 – When changing the needle, always turn off

the main switch.

Otherwise there is danger of injury!

Locking button 15 – Locking the sewing foot in its lifted position.

Element function

Sight glass 7 with inlet

opening 6 – Indicating the oil level in the reservoir for the hook

lubrication.

The reservoir must never be empty.

– Tilt the machine head backwards and fill the oil

ESSO "SP NK 10" into the oil reservoir up to the

mark "MAX".

Control panel 5 – See the instruction manual of the motor

manufacturer.

Light-emitting diodes (LEDs)

1, 2, 3 and 4 – Indicating the maximum speed (number of stitches)

depending on the foot stroke and stitch length:

Active. LEDs Maximum speed

1 2 3 4 4000 rpm*

2 3 4 3000 rpm*

3 4 2000 rpm

* Smaller speeds are possible by the use of smaller

pulleys or by inputting the respective values at the

control panel.

Key block 13

Key 17 – Activate "intermittent tacking" within the seam to be

sewn - as long as the key is activated.

Key 16 – Alternate the needle between its upper position (2nd

position) and bottom position (1st position).

Key 15 – Free for special functions.

Key 14 – Activating the higher foot stroke that has been set

with the relevant dial.

– The different operating modes may be found in the

description of the knee switch 1 (page 10) that

activates the same function.

Light-emitting diodes (LEDs)

at the key block 13

LED 10 – Indicating "Sewing machine motor enabled".

With enabled sewing machine motor, needle

change, bobbin change, threading and

other work within the motion range of

elements are not permitted.

Otherwise there is danger of injury!

LED 8 and 9 – Indicating "Bobbin empty except for remaining

thread". (Only on machines with bobbin thread

monitor)

LED 11 and 12 – Indicating when the keys 14 and 15 are operated.

2.2 Elements at the stand

Elements function

Main switch 2 – Turning on and off the machine.

Pedal 3

Idle position – No function.

Position "half back" – Lifting the foot at machine standstill.

Position "completely

back" – Activating the thread trimmer and lifting the foot.

Positions "in front" – Sewing at the desired speed.

Knee switch 1 – This key has the same function as the key 14

(page 9) of the key block:

Activating a higher foot stroke.

– The operating mode

"Activation as long as the key is being operated"

"Activation until the key is being re-operated"

"Activation as long as the key is being operated and

until all input stitches are sewn"

depends on the input at the control panel.

Maintenance unit

Air filter and water

separator 8 – Before the water level reaches the filter, turn in the

drain screw 7 accordingly. While doing so, do not

interrupt the supply of compressed air.

Pressure regulator 9 – To adjust 6 bar pull up the sleeve 10 and turn it

accordingly.

Mist lubricator 6 – Adjust approx. 1 drop for 10 work cycles using the

set screw 4.

To refill, vent the pneumatic system, turn out the

screw 5 and refill the oil ESSO "SP NK 10" up to the

"groove".

3. Operating the sewing machine

3.1 Threading the needle

thread

–Turn off the main switch of the

machine.

Otherwise there is danger of injury!

–Thread the needle as shown in the

figure.

3.2 Winding the bobbin thread

–Slip the bobbin 4 onto the bobbin

winder 3.

–Pull the thread through the guide 1

and the tension assembly 2.

–Wind the thread clockwise approx. 5

times around the bobbin core and

tear off at the thread clamp 6.

–Press the bobbin winder lever 5 into

the bobbin.

–Sewing

The bobbin winder lever stops the

winding process, when the bobbin is

fully wound.

If the thread is not to be wound during

sewing, the foot must be locked in its

lifted position and the foot stroke must

be set at its smallest value.

3.3 Changing the bobbin

–Turn off main switch.

Otherwise there is danger of injury!

–Pull out the slide plate 7.

–Remove the bobbin case cap 8 with

the bobbin 11.

To do this, grasp under the nose 10 of

the bobbin case cap.

–Remove the bobbin.

–Install the fully wound bobbin such

that the bobbin turns in the direction

shown in the figure, when thread is

drawn.

–Pull the thread through the slot 16,

under the spring 14, through the slot

13, and from the inside to the outside

through the hole 12.

–Install the bobbin case cap with the

bobbin and close the latch 9.

–Push in the slide plate.

3.4 Setting the bobbin thread

tension

–Turn off the main switch of the

machine.

Otherwise there is danger of injury!

–Pull out the slide plate 7.

–Remove the bobbin case cap 8 with

the bobbin 11. To do this, grasp under

the nose 10 of the bobbin case cap.

–Turn the set screw 15 accordingly.

–Install the bobbin case cap with the

bobbin and close the latch 9.

–Push in the slide plate.

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