Durkopp Adler 4120i Manual de Usario

Durkopp Adler máquina de coser 4120i

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Instructions for service

4120i - 5

Minerva Boskovice, a.s., Sokolská 60, CZ - 680 17 Boskovice

Tel.: +420-516-453434, 453433, 494111 Fax: +420-516-452165 http://www.minerva-boskovice.com

Edition: 09/2006 Printed in Czech Republic S735 000726

CONTENTS:

1. General safety instructions ............................................................................................................................................... 1

2. Introduction .......................................................................................................................................................................... 1

3. Head of the sewing machine .............................................................................................................................................. 2

3. 1 Hook and hook post ................................................................................................................................................................ 2

.. 3.1.1 Description

3.1.2 Height setting of the hook

3.1.3 Setting the distance of the hook from the needle

3.1.4 Angular setting of the hook (timing)

3.1.5 Protection of the needle and of the hook point

3.1.6 Setting of the bobbin case opener

3.1.7 Setting the regulation of the hook lubrication

3.1.8 Replacement of the hook

3.1.9 Setting the gear

3.1.10 Dismantling of the hook post

3.2 Needle and thread mechanism ................................................................................................................................. 5

3.2.1 Description

3.2.2 To check the handwheel angular adjustment

3.2.3 Height setting of the needle bar

3.2.4 Angular setting of the pin of the thread mechanism

3.2.5 Side setting of the needle bar holder

3.2.6 Setting the needle (the needle bar holder)

3.3 Throat plate and its post ........................................................................................................................................................ 7

3.3.1 Description

3.3.2 Mounting and removing the throat plate and its insert

3.3.3 Side setting of the throat plate post

3.4 Thread tensioners and limiter ................................................................................................................................. 8

3.4.1 Description

3.4.2 Setting the tension of main and auxiliary tensioners

3.4.3 Setting the tensioning mechanisms of the main tensioners

3.4.4 Setting the adapting spring

3.4.5 Setting the thread limiter

3.5 Feeding mechanism of the bootom feed ...........................................................................................................................10

3.5.1 Description

3.5.2 Stitch length mechanism

3.5.2.1 Setting of the horizontal component of the feeder movement

(setting of the upper feeding eccentric)

3.5.2.2 Setting of the vertical component of the feeder movement

3.5.2.3 Setting of the feeder position against the throat plate

3.5.2.4 Setting of the height of the feeder teeth, setting of the feeding balance beam

3.5.2.5 Forward and rearward stitch length distribution (rough)

3.5.2.6 Forward and rearward stitch length distribution (fine)

3.5.2.7 Setting of the control knob (including the stitch length limitation)

3.5.2.8 Feeder replacement

3.6 Feeding mechanism of the top roller ................................................................................................................................14

3.6.1 Description

3.6.2 Feeding clutch

3.6.2.1 Description

3.6.2.2 Setting of the feeding pitch

3.6.2.3 Setting of the lower eccentric

3.6.2.4 Setting the engagement and disengagement of the clutch

3.6.3 Side setting of the indented lower pulley

3.6.4 Side setting of the indented upper pulley

3.6.5 Setting the tensioning roller

3.6.6 Replacement of the indented belt

3.6.7 Top roller

3.6.7.1 Selection of the top roller diameter

3.6.7.2 Forward, rearward and side setting

3.6.7.3 Setting the gear clearance and in the mounting of the top roller

3.6.7.4 Setting of the height and of the pressing force of the top roller

3.6.7.5 Replacement of the top roller

3.7 Setting the presser foot lift .................................................................................................................................................. 19

3.8 Bobbin winder ...................................................................................................................................................................... 20

3.8.1 Description

3.8.2 Setting the bobbin winder stop

3.8.3 Setting the friction gear

3.9 Safety clutch .......................................................................................................................................................... 21

3.9.1 Description

3.9.2 Setting the disengaging moment

3.10 Indented belt transmission ................................................................................................................................... 21

3.10.1 Setting the tensioning roller of the indented belt

3.10.2 Replacing the indented belt

3.11 V-belt, motor - head .............................................................................................................................................. 22

3.11.1 Tensioning

3.11.2 Replacing the V-Belt

3.12 Driving toothed belt ............................................................................................................................................................... 22

3.12.1 To exchange the driving toothed belt

3.13 Lubrication .............................................................................................................................................................................. 23

3.13.1 Description

3.13.2 Refilling oil

3.13.3 Multiple oil use

4. Thread trimming ................................................................................................................................................................................. 24

4.1 Description of the trimming mechanism

4.2 Setting the pickup roller

4.3 Setting the cam

4.4 Setting the fork

4.5 Setting the moving knife

4.6 Setting the fixed knife

4.7 Setting the retaining spring of the hook thread

4.8 Setting switching of the electromagnets

5. Lifting the top roller by electromagnet ........................................................................................................................... 26

5.1 Description

5.2 Setting the electromagnet pin

5.3 Setting the electromagnet current

5.4 Assembly of the top roller lifting electromagnet

6. Backtacking using electromagnet .................................................................................................................................... 27

6.1 Description

6.2 Electromagnet height setting

6.3 Setting the position of push-buttons

6.4 Change of the function of push-buttons

7. Connecting the electric elements on the machine head ................................................................................................ 28

8. Drive, control panel, position sensor ......................................................................................................................................... 28

9. Maintenance (table of operations) ............................................................................................................................................... 29

10. Setting the machine according to the sewing category ............................................................................................................ 29

10.1 Introduction