DURKOPP ADLER 911-211 Service Instructions Manual

911-211

Service Instructions

IMPORTANT

READ CAREFULLY BEFORE USE

KEEP FOR FUTURE REFERENCE

All rights reserved.

Property of Dürkopp Adler AG and protected by copyright. Any reuse of these contents, i
ncluding extracts, is prohibited without the prior written approval of Dürkopp Adler AG.

Copyright © Dürkopp Adler AG - 2015

Contents

1 About these Service Instructions.............................................. 3

1.1 Scope of the Service Instructions ................................................. 3

1.2 Representation conventions – symbols and characters ............... 3

1.3 Other documents .......................................................................... 4

1.4 Liability.......................................................................................... 4

2 Safety........................................................................................... 5

2.1 Basic safety instructions ............................................................... 5

2.2 Signal words and symbols used in warnings................................ 6

3 Working basis ............................................................................. 9

3.1 Sequence of the settings .............................................................. 9

3.2 Cable routing ................................................................................ 9

3.3 Removing and opening covers ................................................... 10

3.3.1 Access to the machine bottom section ....................................... 10

3.3.2 Removing and installing the motor cover.................................... 11

3.3.3 Removing and installing the arm cover....................................... 11

3.3.4 Removing and installing the head cover..................................... 12

3.3.5 Removing and installing the rear cover ...................................... 12

3.3.6 Removing and installing the belt cover....................................... 13

3.3.7 Opening and closing the bobbin flap .......................................... 13

3.3.8 Removing and fitting the sliding plate......................................... 14

3.4 Removing and installing the burner cover (optional) .................. 14

3.5 Flats on shafts ............................................................................ 15

3.6 Putting the machine into position................................................ 15

3.7 Locking the sewing machine in place ......................................... 16

4 Machine head............................................................................ 17

4.1 Positioning the arm shaft crank .................................................. 17

4.2 Positioning the toothed belt pulleys ............................................ 18

4.2.1 Upper toothed belt pulley............................................................ 18

4.2.2 Lower toothed belt pulley............................................................ 19

4.3 Aligning the needle bar linkage .................................................. 20

4.4 Position of the hook and needle ................................................. 21

4.4.1 Setting the loop stroke position .................................................. 21

4.4.2 Setting the needle bar height...................................................... 22

4.4.3 Setting the hook side clearance ................................................. 24

4.4.4 Adjusting the needle guard......................................................... 25

4.4.5 Setting the needle guide............................................................. 27

4.5 Setting the bobbin housing lifter ................................................. 28

4.5.1 Setting the lifting gap .................................................................. 28

4.5.2 Setting the timing for opening..................................................... 29

4.6 Sewing foot lifter ......................................................................... 31

4.6.1 Setting the stroke position drive ................................................. 31

4.6.2 Setting the light barrier ............................................................... 32

4.6.3 Setting the left stop screw .......................................................... 34

4.6.4 Setting the foot stroke to the needle stroke................................ 35

4.6.5 Setting the presser foot height.................................................... 36

4.6.6 Setting the reference light barrier sewing axis............................ 38

4.7 Setting the needle thread tension............................................... 39

4.7.1 Setting the thread regulator ........................................................ 39

4.7.2 Setting the thread tensioning spring........................................... 40

Service Instructions 911-211 - 00.0 - 02/2015

1

Contents

4.7.3 Adjusting the thread tension ....................................................... 41

4.8 Thread cutter .............................................................................. 43

4.8.1 Setting the height of the thread-pulling knife .............................. 43

4.8.2 Setting the cutoff curve............................................................... 44

4.8.3 Setting the cutting pressure........................................................ 45

4.8.4 Setting point in time for cutting ................................................... 47

4.9 Thread burner (optional)............................................................. 48

4.9.1 Adjusting the upper burner ......................................................... 48

4.9.2 Adjusting the lower burner.......................................................... 53

4.9.3 Changing the burner tips ............................................................ 54

4.9.4 Adjusting the thread advancing device....................................... 55

4.9.5 Setting the hook thread clamp.................................................... 57

4.9.6 Setting the control cam for the thread advancing device............ 58

4.10 Changing the material presser foot bar ...................................... 59

5 Sewing machine ....................................................................... 61

5.1 Checking the machine zero point ............................................... 61

5.2 Changing the drives.................................................................... 62

5.2.1 X drive ........................................................................................ 62

5.2.2 Y drive ........................................................................................ 63

5.3 Checking the play between the toothed rack and

gear pinion.................................................................................. 64

6 Maintenance work .................................................................... 65

6.1 Lubrication .................................................................................. 65

6.1.1 Lubrication - machine head ........................................................ 66

6.1.2 Lubrication - hook ....................................................................... 67

6.2 Thread suction device ................................................................ 68

6.3 Pneumatic system ...................................................................... 68

6.3.1 Setting operating pressure ......................................................... 68

6.3.2 Draining the water condensation ................................................ 69

6.3.3 Cleaning the filter element.......................................................... 70

6.4 Cleaning work............................................................................. 71

6.4.1 Cleaning the machine................................................................. 71

6.4.2 Cleaning the motor fan mesh ..................................................... 72

6.5 Checking the toothed belt........................................................... 72

2

Service Instructions 911-211 - 00.0 - 02/2015

About these Service Instructions

1.

2.
etc

•



1 About these Service Instructions

These instructions for the CNC sewing unit 911-211 were compiled with
the utmost care. They contain information and notes in order to ensure
long-term and reliable operation.

1.1 Scope of the Service Instructions

These instructions describe the setting and maintenance work on the
911-211 CNC sewing unit. They apply to all submodels.
The intended use and setup is described in the  Operating Instructions.

1.2 Representation conventions – symbols and characters

Various information in these instructions is represented or highlighted
by the following characters in order to facilitate easy and quick under­standing:

Proper setting

Indicates proper setting.

Malfunctions

Specifies the faults that can occur due to an incorrect setting.

Steps to be performed when operating the machine (sewing and
equipping)

Steps to be performed for service, maintenance, and installation

Steps to be performed via the software control panel

The individual steps are numbered:

1. First step

2. Second step

The sequence of the steps must always be followed.

Lists are identified by bullet points.

Result of performing an operation

Change to the machine or in the display.

Important

Special attention must be paid to this point when performing a step.

Service Instructions 911-211 - 00.0 - 02/2015 3

About these Service Instructions

Information

Additional information, e.g. on alternative operating options.

Sequence

Specifies the work to be performed before or after a setting.

References

 Reference to another section in these instructions.

Safety Important warnings for the machine users are specially designated. Since

safety is of particular importance, hazard symbols, levels of danger and
their signal words are described separately in  2 Safety, p. 5.

Orientation If the figure is unclear, indications of "right" and "left" are always from the

user's point of view.

1.3 Other documents

Some of the machine's built-in components have been made by third-party
manufacturers. Each manufacturer has performed a hazard assessment
for these purchased parts and confirmed their design compliance with ap­plicable European and national regulations. The proper use of these com­ponents is described in the instructions prepared by each manufacturer.

1.4 Liability

All information in these service instructions was compiled with consider­ation to the state of the art, and applicable standards and regulations.

The manufacturer cannot be held liable for damages resulting from:

• Breakage and damage during transport

• Failure to follow the operating instructions

• Improper use

• Unauthorized modifications to the machine

• Use of untrained personnel

• Use of unapproved replacement parts

4

Service Instructions 911-211 - 00.0 - 02/2015

Safety

2 Safety

This chapter contains basic information for your safety. Read the instruc­tions carefully before setting up or operating the machine. Make sure to
follow the information included in this section. Failure to do so can result
in serious injury and damage to the machine.

2.1 Basic safety instructions

The machine may only be used as described in these instructions.

The instructions should be available at the machine's location at all times.

Work on live components and equipment is prohibited. Exceptions are
defined in the regulations set forth in DIN VDE 0105.

For the following work, the machine must be disconnected from the power
supply using the main switch or by disconnecting the power plug:

• Replacing the needle or other sewing tools

• Leaving the workplace

• Performing maintenance work and repairs

• Threading

Missing or faulty spare parts could impair safety and damage the machine.
Make sure you only use original replacement parts from the manufacturer.

Transport Use a sturdy lifting carriage or stacker for transporting the machine. Raise

the machine max. 20 mm and secure it against slipping off.

Setup The power cable must have a plug authorized for the country in which the

machine is being used. The power plug may only be connected to the
power cable by a qualified specialist.

Obligations

of the operator

Observe the country-specific safety and accident prevention regulations
and the legal regulations concerning industrial safety and the protection of
the environment.

All warnings and safety signs on the machine must always be in legible
condition and may not be removed. Missing or damaged labels should be
replaced immediately.

Requirements

to be met by

the personnel

The machine may only be set up by qualified technicians.

Maintenance work and repairs may only be carried out by qualified tech­nicians.

Work on electrical equipment may only be carried out by qualified special­ists.

Only authorized persons may work on the machine. Every person who
works on the machine must first have understood these instructions.

Service Instructions 911-211 - 00.0 - 02/2015 5

Safety

Operation Inspect the machine while in use for any externally visible damage. Stop

working if you notice any changes to the machine. Report any changes to
your supervisor. A damaged machine must no longer be used.

Safety

equipment

Safety equipment should not be removed or deactivated. If this cannot be
avoided for a repair operation, the safety equipment must be refitted and
put back into service immediately afterwards.

2.2 Signal words and symbols used in warnings

Warnings in the text are distinguished by color bars. The color scheme is
oriented towards the severity of the danger. Signal words indicate the
severity of the danger.

Signal words Signal words and the hazard that they describe:

Signal word Meaning

DANGER (with hazard symbol)

If ignored, death or serious injury will result

WARNING (with hazard symbol)

If ignored, death or serious injury can result

CAUTION (with hazard symbol)

If ignored, moderate or light injury can result

NOTICE (without hazard symbol)

If ignored, material damage can result

Symbols The following symbols indicate the type of danger to personnel:

Symbol Type of danger

General

Electric shock

Pointed objects

Crushing

Environmental damage

6 Service Instructions 911-211 - 00.0 - 02/2015

Safety

Examples Examples of the layout of the warnings in the text:

DANGER

Type and source of danger!

Consequences of non-compliance.
Measures for avoiding the danger.

 This is what a warning looks like for a hazard that will result in serious

injury or even death if ignored.

WARNING

Type and source of danger!

Consequences of non-compliance.
Measures for avoiding the danger.

 This is what a warning looks like for a hazard that could result in seri-

ous injury or even death if ignored.

CAUTION

Type and source of danger!

Consequences of non-compliance.
Measures for avoiding the danger.

 This is what a warning looks like for a hazard that could result in mod-

erate or minor injury if the warning is ignored.

CAUTION

Type and source of danger!

Consequences of non-compliance.
Measures for avoiding the danger.

 This is a warning note for a hazard that could result in environmental

damage if ignored.

Service Instructions 911-211 - 00.0 - 02/2015 7

Safety

NOTICE

Type and source of danger!

Consequences of non-compliance.
Measures for avoiding the danger.

 This is what a warning looks like for a hazard that could result in mate-

rial damage if ignored.

8 Service Instructions 911-211 - 00.0 - 02/2015

Working basis

3 Working basis

3.1 Sequence of the settings

Sequence

must be

observed!

Tying cables

together

The setting positions for the sewing machine are interdependent.

Always adhere to the specified sequence for the individual setting steps.

Always observe all information on requirements and following settings
marked at the side with .

NOTICE

Machine damage possible due to incorrect sequence.

It is essential to adhere to the working sequence specified in these
instructions.

3.2 Cable routing

Lay all cables in the machine such that moving parts are not impaired in
their ability to function correctly.

1. Lay any excess cabling neatly in proper cable snakes.

2. Tie the snakes together using a cable tie.

If possible, bind the snakes to fixed parts.
The cables must be fixed firmly in place.

3. Cut off any protruding part of the cable tie.

NOTICE

Machine damage and malfunctions can be caused by laying
the cables incorrectly.

Excess cabling may obstruct moving machine parts in their ability to
function correctly. This will affect the sewing function and may cause
damage.

Lay excess cabling as described above.

Service Instructions 911-211 - 00.0 - 02/2015 9

Working basis

(1) - Locking lever
(2) - Head cover area

(3) - Drive carriage
(4) - Latch

③

④

①

②

3.3 Removing and opening covers

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch the machine off before you remove the

covers or refit them.

In many types of setting work, you will have to remove the machine covers
in order to access the components.

Described here is how to remove the individual covers and how to refit
them. Just the cover that needs to be removed is then specified in the text
for that particular type of setting work.

3.3.1 Access to the machine bottom section

In order to access the components at the machine bottom section, you
must first swivel up the machine head.

Fig. 1: Swiveling the machine head up and down

Swiveling up the machine head

1. Release the locking lever (1) under the table top.

2. Lift the machine head in the head cover area (2) and swivel up carefully.

 The latch (4) latches into place.

Swiveling down the machine head

1. Hold the machine head in the head cover area (2).

2. Release the latch (4).

3. Swivel the machine head down.

4. Latch the locking lever (1) under the table top.

10 Service Instructions 911-211 - 00.0 - 02/2015

Working basis

(1) - Screws (2) - Motor cover

②

①

(1) - Screws (2) - Arm cover

②

①

3.3.2 Removing and installing the motor cover

Fig. 2: Removing and installing the motor cover

Removing the motor cover

1. Loosen both screws (1).

2. Remove the motor cover (2).

Installing the motor cover

1. Fit the motor cover (2).

2. Tighten both screws (1).

3.3.3 Removing and installing the arm cover

Fig. 3: Removing and installing the arm cover

Removing the arm cover

1. Remove the motor cover.

2. Loosen the screws (1).

3. Remove the arm cover (2).

Installing the arm cover

1. Fit the arm cover (2).

2. Tighten the screws (1).

3. Press the hand crank and check for ease of movement; adjust the arm

cover position if necessary.

4. Fit the motor cover.

Service Instructions 911-211 - 00.0 - 02/2015 11

3.3.4 Removing and installing the head cover

(1) - Screws (2) - Head cover

①

②

(1) - Screws (2) - Rear cover

①

②

Fig. 4: Removing and installing the head cover

Removing the head cover

1. Loosen the screws (1).

2. Remove the head cover (2).

Installing the head cover

1. Fit the head cover (2).

2. Tighten the screws (1).

Working basis

3.3.5 Removing and installing the rear cover

Fig. 5: Removing and installing the rear cover

Removing the rear cover

1. Undo all 3 screws (1).

2. Take off the rear cover (2) by moving it back.

12 Service Instructions 911-211 - 00.0 - 02/2015

Installing the rear cover

1. Fit the rear cover (2).

2. Tighten all 3 screws (1).

Working basis

(1) - Screws (2) - Belt cover

①

②

(1) - Bobbin flap

①

3.3.6 Removing and installing the belt cover

Fig. 6: Removing and installing the belt cover

Removing the belt cover

1. Undo all 3 screws (1).

2. Take off the belt cover (2).

Installing the belt cover

1. Fit the belt cover (2).

2. Tighten all 3 screws (1).

3.3.7 Opening and closing the bobbin flap

Fig. 7: Opening and closing the bobbin flap

Service Instructions 911-211 - 00.0 - 02/2015 13

Opening the bobbin flap

1. Switch the machine on and reference it.

2. Remove the material holder.

3. Press the Safe Stop key.

 The bobbin flap (1) pivots to the side.

Closing the bobbin flap

(1) - Sliding plate (2) - Hole

①

②

(1) - Screws (2) - Burner cover

①

②

1. Release the Safe Stop key.

2. Fit the material holder.

3.3.8 Removing and fitting the sliding plate

Fig. 8: Removing and fitting the sliding plate

Working basis

Removing the sliding plate

1. Reach through the hole (2) from below and lift the sliding plate (1).

2. Remove the sliding plate (1).

Fitting the sliding plate

1. Fit the sliding plate (1).

3.4 Removing and installing the burner cover (optional)

Fig. 9: Removing and installing the burner cover

14 Service Instructions 911-211 - 00.0 - 02/2015

Working basis

2

1

(1) - Flat (2) - Shaft

(1) - Hand crank

①

Removing the burner cover

1. Loosen both screws (1).

2. Remove the burner cover (2).

Installing the burner cover

1. Fit the burner cover (2).

2. Tighten both screws (1).

3.5 Flats on shafts

Fig. 10: Flats on shafts

Some shafts have flats at those points where the components are
clamped on to the shaft. This stabilizes the connection and makes adjust­ment easier.

Always make sure that the whole screw is seated flush on the flat.

3.6 Putting the machine into position

For some settings, the machine must be put into a certain position, using
the hand crank on the arm cover. The machine has no handwheel.

Fig. 11: Hand crank

Service Instructions 911-211 - 00.0 - 02/2015 15

Setting steps

1. Press and turn the hand crank (1) until the machine is in the setting

position.

Working basis

(1) - Arresting pin
(2) - Large arresting groove

(3) - Small arresting groove
(4) - Arm shaft crank

①

②

③

④

(5) - Groove (6) - Arresting pin

⑤

⑥

3.7 Locking the sewing machine in place

For some settings, the machine has to be locked in place. To do this, the
arresting pin from the accessory pack is inserted into a groove on the arm
shaft crank to block the arm shaft.

Fig. 12: Arresting pin and arresting grooves on the arm shaft crank

There are 2 securing positions:

• Position 1: Loop stroke position

• 5 mm end in the large groove

• Setting the loop stroke and needle bar height

• Position 2: Needle at top dead center

• 3 mm end in the small groove

• Checking the top dead center of the needle bar

Fig. 13: Locking the sewing machine in place

Locking the machine in place

1. Insert the arresting pin (6) with the appropriate end in the groove (5).

Removing the lock

1. Pull the arresting pin (6) out of the groove (5).

16 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Arm shaft crank (2) - Setscrews

①

②

4 Machine head

4.1 Positioning the arm shaft crank

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch the machine off before you check and set

the position of the arm shaft crank.

Proper setting

The 3 setscrews (2) on the arm shaft crank (1) are seated flush on the flat.

Cover

• Arm cover (

Fig. 14: Setting the arm shaft crank

Setting steps

1. Release all the setscrews (2) on the arm shaft crank (1).

2. Turn the arm shaft crank (1) such that the setscrews (2) are seated flush

on the flat of the arm shaft.

3. Push the arm shaft crank (1) to the right as far as it will go.

4. Tighten all the setscrews (2) on the arm shaft crank (1).



3.3.2 Removing and installing the motor cover, p. 11)

Service Instructions 911-211 - 00.0 - 02/2015 17

Machine head

(1) - Setscrews
(2) - Flat on the arm shaft

(3) - Upper toothed belt pulley
(4) - Toothed belt

③

④

①

②

4.2 Positioning the toothed belt pulleys

The two toothed belt pulleys must be positioned relative to each other
such that the toothed belt can run correctly.

Sequence

• Always check the position of the other toothed belt pulley after making a

change on either of the toothed belt pulleys.

4.2.1 Upper toothed belt pulley

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch the machine off before you check and set

the upper toothed belt pulley.

Proper setting

The 2 setscrews for the upper toothed belt pulley are seated flush on the
flat.

Cover

• Arm cover (

Fig. 15: Setting the upper toothed belt pulley

Setting steps

1. Using the screwdriver, push the toothed belt (4) sufficiently far to the

side that the 2 setscrews (1) can be reached.

2. Loosen the setscrews (1).



3.3.2 Removing and installing the motor cover, p. 11)

18 Service Instructions 911-211 - 00.0 - 02/2015

3. Turn the upper toothed belt pulley (3) such that the setscrews (1) are

seated flush on the flat (2) of the arm shaft.

4. Tighten the setscrews (1).

5. Use the screwdriver to push the toothed belt (4) back again.

Machine head

(1) - Toothed belt
(2) - Edge

(3) - Lower toothed belt pulley
(4) - Setscrews

③

④

①

②

4.2.2 Lower toothed belt pulley

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch the machine off before you check and set

the lower toothed belt pulley.

Proper setting

Both setscrews for the lower toothed belt pulley are seated flush on the flat
of the lower shaft.

The toothed belt runs correctly without running against the edge of the off­set gear pinion or slipping off.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10

•Belt cover ( 3.3.6 Removing and installing the belt cover, p. 13)

)

Fig. 16: Setting the lower toothed belt pulley

Setting steps

1. Loosen both setscrews (4).

2. Turn the lower toothed belt pulley (3) such that the setscrews (4) are

seated all the way on the flat of the lower shaft.

3. Move the lower toothed belt pulley (3) sufficiently far to the side that the

toothed belt (1) makes contact with the edge (2) without being pushed
away.

4. Screw both setscrews (4) firmly in place.

Service Instructions 911-211 - 00.0 - 02/2015 19

Machine head

(1) - Setscrews (2) - Needle hole

(3) - Needle bar linkage

③

②

①

4.3 Aligning the needle bar linkage

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch off the machine before aligning the needle

bar linkage sideways.

Sequence

First check the following setting:

• A straight and undamaged needle must be inserted

( Operating Instructions chapter, Inserting and replacing the needle)

Proper setting

1. Turn the needle bar to the bottom.

 The needle must enter the needle hole precisely in the center.

Cover

• Head cover ( 3.3.4 Removing and installing the head cover, p. 12)

Fig. 17: Aligning the needle bar linkage sideways

Setting steps

1. Loosen both setscrews (1).

2. Adjust the needle bar linkage (3) so that the needle enters the needle

hole (2) precisely in the center.

3. Tighten the setscrews (1).

20 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Needle
(2) - Groove

(3) - Hook tip

③

①

②

4.4 Position of the hook and needle

4.4.1 Setting the loop stroke position

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the loop stroke position.

The loop stroke is the path length from the bottom dead center of the
needle bar up to the height where the hook tip picks up the loop of thread.

Fig. 18: Loop stroke

The loop stroke is precisely 2.4 mm.

Sequence

First check the following settings:

• Needle bar linkage ( 4.3 Aligning the needle bar linkage, p. 20)

• A straight and undamaged needle must be inserted

( Operating Instructions chapter, Inserting and replacing the needle)

Proper setting

Machine is locked in place at position 1 ( p. 16).
 The hook tip (3) is precisely at the center (1) of the needle.

Fault caused by an incorrect setting

• Missing stitches

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bottom

section, p. 10)

Service Instructions 911-211 - 00.0 - 02/2015 21

Machine head

(4) - Clamping ring
(5) - Setscrews

(6) - Center of the needle
(7) - Hook tip

④ ⑤ ⑥ ⑦

Fig. 19: Setting the loop stroke position

Setting steps

1. Lock the machine in place at position 1 ( p. 16).

2. Loosen all 4 setscrews (5) for the clamping ring (4) on the hook shaft.

3. Rotate the hook such that the hook tip (7) is precisely at the center of

the needle (6).

4. Tighten the setscrews (5) for the clamping ring (4).



5. Remove the lock (

p. 16).

Sequence

Then check the following settings:

• Position of the needle guard

( 4.4.4 Adjusting the needle guard, p. 25)

• Timing of cutting by the thread cutter ( 4.9.6 Setting the control cam

for the thread advancing device, p. 58)

4.4.2 Setting the needle bar height

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the needle bar height.

Sequence

First check the following settings:

• Loop stroke position ( 4.4.1 Setting the loop stroke position, p. 21)

• A straight and undamaged needle must be inserted

( Operating Instructions chapter, Inserting and replacing the needle)

22 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Screws
(2) - Throat plate
(3) - Needle bar

(4) - Screw
(5) - Groove for the needle
(6) - Hook tip

⑤

⑥

③

④

①

②

Proper setting

Machine is locked in place at position 1 ( p. 16).
 The hook tip is level with the lower third of the groove for the needle.

Faults caused by an incorrect needle bar height

• Damage to the hook tip

• Jamming of the needle thread

• Missing stitches

• Thread breakage

• Needle breakage

Cover

• Head cover ( 3.3.4 Removing and installing the head cover, p. 12)

• Bobbin flap ( 3.3.7 Opening and closing the bobbin flap, p. 13)

Fig. 20: Setting the needle bar height

Setting steps

1. Lock the machine in place at position 1 ( p. 16).

2. Loosen the screws (1).

3. Remove the throat plate (2).

4. Loosen the screw (4) for the needle bar (3).

5. Move the height of the needle bar (3) such that the hook tip (6) is in the

middle of the lower third of the groove for the needle (5).
When doing this, take care not to twist the needle. The groove (5) must

face towards the hook.

Service Instructions 911-211 - 00.0 - 02/2015 23

6. Tighten the screw (4) for the needle bar (3).

7. Fit the throat plate (2).

8. Tighten the screws (1).

9. Remove the lock (



p. 16).

Sequence

Then check the following setting:

• Position of the needle guard

( 4.4.4 Adjusting the needle guard, p. 25)

4.4.3 Setting the hook side clearance

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch off the machine before checking and setting

the hook side clearance.

Machine head

Sequence

First check the following settings:

• A straight and undamaged needle must be inserted

( Operating Instructions chapter, Inserting and replacing the needle)

• Needle bar linkage ( 4.3 Aligning the needle bar linkage, p. 20)

• Loop stroke position ( 4.4.1 Setting the loop stroke position, p. 21)

NOTICE

Damage to the machine, needle breakage, or thread damage due
to an incorrect clearance between the needle and hook tip

Check the distance to the hook tip after inserting a new needle with
a different size.
Reset distance if necessary.

Proper setting

Machine locked in place at position 1 ( p. 16).


Maximum 0.1 mm distance between the hook tip and the groove for the
needle.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bottom

section, p. 10)

24 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Clamping ring
(2) - Screws
(3) - Hook support

(4) - Groove for the needle
(5) - Hook tip

③

⑤

④

①

②

Fig. 21: Setting the hook clearance

1. Lock the machine in place at position 1 ( p. 16).

2. Loosen the screws (2) for the hook support (3).

3. Loosen the setscrews for the clamping ring (1).

4. Move the hook support (3) sideways such that the distance between the

hook tip (5) and the groove for the needle (4) is 0.1 mm at most, without
the hook tip (5) touching the needle.

5. Tighten the screws (2) for the hook support (3).

6. Tighten the setscrews for the clamping ring (1).

7. Check the loop stroke position ( p. 21).

8. Remove the lock (

Sequence

Then check the following setting:

• Position of the needle guard

( 4.4.4 Adjusting the needle guard, p. 25)

4.4.4 Adjusting the needle guard



p. 16).

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and adjust­ing the needle guard.

The needle guard prevents contact between needle and hook tip.

Service Instructions 911-211 - 00.0 - 02/2015 25

Machine head

(1) - Needle guard
(2) - Screw

(3) - Needle

③

①

②

Sequence

First check the following settings:

• Loop stroke position ( 4.4.1 Setting the loop stroke position, p. 21)

• Hook side clearance ( 4.4.3 Setting the hook side clearance, p. 24)

• Needle bar height ( 4.4.2 Setting the needle bar height, p. 22)

• A straight and undamaged needle must be inserted ( Operating

Instructions chapter, Inserting and replacing the needle)

NOTICE

Damage to the machine, needle breakage, or thread damage due
to an incorrect clearance between the needle and hook tip

Check the distance to the hook tip after inserting a new needle with
a different size.
Reset distance if necessary.

Proper setting

Machine locked in place at position 1 ( p. 16).
 The needle guard pushes the needle away just enough so that it is not

touched by the hook tip.

Fig. 22: Adjusting the needle guard

Setting steps

1. Press and turn the hand crank and check how far the needle guard (1)

pushes the needle (3) away.

2. Turn the screw (2) such that the needle guard (1) just pushes the

needle (3) far away enough so that it is not touched by the hook tip:

• For pushing away more: Turn counterclockwise

• For pushing away less: Turn clockwise

26 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Screws
(2) - Throat plate

(3) - Needle guide
(4) - Screw
(5) - Paper

③

⑤

④

①

②

4.4.5 Setting the needle guide

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the needle guide.

Sequence

First check the following setting:

• A straight and undamaged needle must be inserted ( Operating

Instructions chapter, Inserting and replacing the needle)

Proper setting

1. Machine locked in place at position 1 ( p. 16).

 The needle guard pushes the needle just enough away so that it

cannot be touched by the hook tip.

Faults caused by an incorrect setting of the needle guide

• Damage to the needle

• Missing stitches

Fig. 23: Setting the needle guide

Setting steps

1. Loosen the screws (1).

2. Remove the throat plate (2).

3. Rotate the machine to position 1 ( p. 16).

4. Loosen the screw (4).

5. Move the needle guide (3) as close as possible against the needle.

6. Tighten the screw (4).

7. Check this distance using a piece of paper (5).

Service Instructions 911-211 - 00.0 - 02/2015 27

Machine head

(1) - Bobbin housing
(2) - Bobbin housing lifter

(3) - Nose of the bobbin housing
(4) - Middle section holder

③

④

①

②

4.5 Setting the bobbin housing lifter

Fig. 24: Bobbin housing lifter

The hook pulls the needle thread through between the nose of the bobbin
housing (3) and the middle section holder (4).

The bobbin housing lifter (2) now pushes the bobbin housing (1) away so
that a gap appears for the thread.

If the hook tip is located below the bobbin housing lifter, then the bobbin
housing lifter must open so that the thread can also slide past in that
position.

So that the thread can slip through without a problem, the width of the
lifting gap and the timing of opening have to be set.

Faults caused by an incorrect setting:

• Thread breakage

• Formation of loops on the bottom side of the seam

• Loud machine noise

4.5.1 Setting the lifting gap

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch off the machine before setting the width of

the lifting gap.

28 Service Instructions 911-211 - 00.0 - 02/2015

Sequence

Always check the width of the lifting gap after making changes to the
needle thread size. The correct width of the lifting gap depends on the
thickness of the needle thread.

Proper setting

The needle thread slides through unobstructed between the nose of the
bobbin housing and the middle section holder.

Machine head

(1) - Setscrew
(2) - Screw

(3) - Cover
(4) - Bobbin housing lifter

③④

①

②

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bottom

section, p. 10)

Fig. 25: Setting the lifting gap

Setting steps

1. Loosen the screw (2).

2. Push the cover (3) downwards.

3. Loosen the setscrew (1).

4. Set the bobbin housing lifter (4) such that the gap between the nose of

the bobbin housing and the middle section holder is just big enough to
allow the needle thread to slip through without a problem.

While doing so, ensure that the gap is not so big that the middle part of
the hook swings to and fro, hitting the middle section holder.

5. Tighten the setscrew (1).

6. Push the cover (3) upwards.

7. Tighten the screw (2).

4.5.2 Setting the timing for opening

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch off the machine before checking and setting

the point in time of opening.

Proper setting

The bobbin housing lifter starts to open exactly at that point when the hook
tip is located below the bobbin housing lifter after the loop is taken up.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bottom

section, p. 10)

Service Instructions 911-211 - 00.0 - 02/2015 29

Machine head

(1) - Plug (2) - Setscrew

①②

Fig. 26: Setting the timing for lifting

Setting steps

1. Remove the plug (1).

2. Press and turn the hand crank until the tip of the needle is level with the

throat plate. The setscrew (2) must be accessible from the underside of
the hook support.

3. Slacken the setscrew (2) and use a hex key to turn the socket-head

screw so that the hex key stands exactly vertical.

4. Tighten the setscrew (2).

5. Insert the plug (1) into the opening.

30 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

16,5±0,5 mm

(1) - Top edge of the stroke position housing
(2) - Toothed rack

(3) - Gear pinion
(4) - Setscrews

③④

①②

4.6 Sewing foot lifter

4.6.1 Setting the stroke position drive

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the stroke position drive.

Fig. 27: Setting the stroke position drive

Proper setting

The toothed rack must be 16.5

± 0.5 mm distant from the top edge (1) of

the stroke position housing. The setscrews must be visible in the long hole
and must be horizontal.

Cover

• Motor cover ( 3.3.2 Removing and installing the motor cover, p. 11

)

Setting steps

1. Loosen the setscrews (4).

2. Remove the gear pinion (3).

3. Move the toothed rack (2) to 16.5 mm below the upper stop.

4. Insert the gear pinion (3) so that the setscrews (4) are horizontal.

5. Tighten the setscrews (4).

Service Instructions 911-211 - 00.0 - 02/2015 31

Machine head

(1) - Mounting plate
(2) - Light barrier

(3) - Screw
(4) - Lever

③

④

①

②

4.6.2 Setting the light barrier

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Test and adjust the light barrier only with very
great care.

Proper setting

The light barrier with its mounting plate must be installed so that the
toothed rack triggers it before reaching the upper stop.

1. Use the Multitest program to test the setting.

 The distance between the bottom edge of the mounting plate and the

stroke position housing should be approx. 3.5 mm.

Fig. 28: Setting the light barrier

3,5 mm

Cover

• Head cover (

• Motor cover ( 3.3.2 Removing and installing the motor cover, p. 11



3.3.4 Removing and installing the head cover, p. 12)
)

32 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

Setting steps

1. Loosen the screw (3).

2. Adjust the mounting plate (2) accordingly.

3. Tighten the screw (3).

4. Switch the machine off and on again.

5. Tap on Service.

6. Input the password (25483).

7. Tap on Multitest > Test inputs/outputs.

8. Push the lever (4) up and monitor the display.
 It will show either +103 or -103.

9. Check that the toothed rack still has about 0.5 mm clearance from
the stop.

10. If necessary, adjust the light barrier using the mounting plate.

Service Instructions 911-211 - 00.0 - 02/2015 33

Machine head

(1) - Lever
(2) - Nut
(3) - Stop screw

(4) - Stop block
(5) - Lifting gear lever

③⑤④

①②

4.6.3 Setting the left stop screw

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the left stop screw.

Proper setting

The left stop screw (3) of the lifting gear must be set so that the lever (1)
performs no stroke when it is lying against the stop block (4). The levers
of the lifting gear (5) overlap.

1. Switch the machine off and on again.

2. Reference the machine.

3. Tap on Tools > Service > Multitest > Set stroke position.

4. Tap on walking foot/presser foot until the presser foot is
selected.

5. Press and turn the hand crank and check that no stroke is performed.

Fig. 29: Setting the left stop screw

Setting steps

1. Release the nut (2).

2. Turn the stop screw (3) appropriately.

3. Tighten the nut (4).

34 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Lever
(2) - Lifting gear
(3) - Eccentric

(4) - Sewing foot
(5) - Stop screw
(6) - Stop block

③

①②

⑤

④

⑥

4.6.4 Setting the foot stroke to the needle stroke

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Test and adjust the foot stroke to the needle stroke
only with very great care.

Fig. 30: Setting the foot stroke to the needle stroke

Proper setting

The lifting gear (2) must be switched on so that it performs a stroke. The
stop block (6) must then lie against the right hand stop screw (5).

The eccentric (3) for the presser foot must be set so that

1. Switch the machine off and on again.

2. Reference the machine.

Service Instructions 911-211 - 00.0 - 02/2015 35

• when the needle bar is at bottom dead center - the presser foot is
lowered

• after the loop stroke - the presser foot stroke starts.

Machine head

3. Tap on Tools > Service > Multitest > Set stroke position.

4. Tap on walking foot/presser foot until the walking foot is
selected.

5. In the controller, switch on the sewing foot stroke.

6. Turn the machine head to the loop stroke position.

 The lever (1) must make a movement.

Setting steps

1. Loosen the eccentric (3).

2. Rotate the eccentric (3) on the arm shaft.

3. Tighten the setscrew on the eccentric (3).

4. Press and turn the hand crank and check that the lever (1) makes a
movement.

4.6.5 Setting the presser foot height

The sewing foot height can be set electronically from 1 mm to a maximum
of 10 mm.

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Test and adjust the presser foot height only with
very great care.

Proper setting

If a height of 1 mm is set in the controller, the presser foot must be 1 mm
above the throat plate.

1. Fit the walking foot.

2. Tap on Tools > Service > Multitest > Set stroke position.

3. Tap on walking foot/presser foot until the walking foot is
selected.

4. Tap on Sewing foot stroke.

5. Input a sewing foot height of 1.0 mm.

6. Move to position.

7. Turn the sewing foot to bottom dead center.

 The distance between the throat plate and sewing foot must be

1mm.

36 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Screw
(2) - Nut

(3) - Screw

③

①②

Fig. 31: Setting the presser foot height

Setting steps

1. Loosen the screw (3).

2. Turn the pivot shaft so that the distance between throat plate and
sewing foot is 1 mm.

3. Tighten the screw (3).

4. Turn the sewing foot to top dead center.

 The distance between the throat plate and sewing foot must be

5mm.

5. Undo the nut (2).

6. Adjust the screw (1) so that the distance between the throat plate and
sewing foot is 5 mm (corresponding to a 4 mm sewing foot stroke).

Notice

The distance between min. and max. positions may have to be deter­mined. If one of these settings is changed the other setting must be
checked again.

Service Instructions 911-211 - 00.0 - 02/2015 37

Machine head

(1) - Setscrew
(2) - Take-up lever disk

(3) - Arresting pin

③

①②

4.6.6 Setting the reference light barrier sewing axis

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Test and adjust the reference light barrier only with
very great care.

Proper setting

To reference the needle bar, position the machine at top dead center.

1. Switch the machine off and on again.

2. Reference the machine and check that the needle bar is at top dead
center.

Fig. 32: Setting the reference light barrier

Cover

• Arm cover (



Setting steps

1. Switch the machine off and on again.

2. Tap on Multitest.

3. Input the password (25483).

4. Tap on Multitest > Test inputs/outputs.

5. Turn the needle bar to top dead center and insert the 3 mm end of the
arresting pin to peg the arm shaft crank to position II.

6. Loosen the setscrew (1).

7. Rotate the take-up lever disk (2) on the arm shaft accordingly.

 The switch S100 then switches.

38 Service Instructions 911-211 - 00.0 - 02/2015

3.3.3 Removing and installing the arm cover, p. 11)

Machine head

+

(1) - Thread regulator
(2) - Screw

①

②

8. Tighten the setscrew (1).

9. Remove the arresting pin (3).

10. Switch the machine off and on again.

11. Check that the needle bar is at top dead center.

4.7 Setting the needle thread tension

4.7.1 Setting the thread regulator

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the thread regulator.

The thread regulator determines the tension applied to guide the needle
thread around the hook. The required tension depends on the thickness of
the material to be sewn, thread strength, and stitch length.

Proper setting

The loop of the needle thread slides at low tension over the thickest point
of the hook, without forming loops or snagging.

Fig. 33: Setting the thread regulator

1234

Setting steps

1. Press and turn the hand crank and monitor the progress of the needle

thread around the hook.

2. Loosen the screw (2).

3. Move the thread regulator

• Slide to the left = more thread

• Slide to the right = less thread

4. Tighten the screw (2).

Service Instructions 911-211 - 00.0 - 02/2015 39

Machine head

(1) - Stop collar
(2) - Spring

(3) - Tension disk
(4) - Screw

③

④

①

②

4.7.2 Setting the thread tensioning spring

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the thread tensioning spring.

The thread tensioning spring holds the needle thread under tension from
the top dead center of the thread lever up to the point when the needle eye
plunges into the sewing material.

Proper setting
Basic setting: The thread tensioning spring does not contact the stop

until the needle eye has plunged into the sewing material.
The setting for the thread tensioning spring must be varied according to

the sewing material and the required sewing result.

Fig. 34: Setting the thread tensioning spring

Setting steps

1. Loosen the screw (4).

2. Setting the spring travel: Turn the stop collar (1):

• Longer spring travel: Turn counterclockwise

• Shorter spring travel: Turn clockwise

3. Setting the spring tension: Turn the tension disk (3):

• Greater spring tension: Turn counterclockwise

• Less spring tension: Turn clockwise
Do not twist the stop collar in doing so.

4. Tighten the screw (4).

40 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Screw
(2) - Nut

(3) - Washer
(4) - Tension disk

③

④

①

②

4.7.3 Adjusting the thread tension

Fig. 35: Adjusting the thread tension

1. Remove the sewing thread from the thread tensioner.

2. Tap on Tools > Service > Multitest.

3. Input the password (25483).

4. Tap on thread tensioner > Calibration 3.

5. Undo screw (1), nut (2) and disk (3).

6. Turn the disk (3) clockwise, feeling for the stop (until the tension disks
lie flush against each other).

7. Use a (lead) pencil to mark 12 o'clock on the disk (3) and turn it approx.
15-30° clockwise.

8. Lock the nut (2). Take care the disk (3) does not turn with the nut.

9. Tap on ESC or OK.

10. Tap on Calibration 1.

11. Screw in the screw (1) as far as the nut (2).

12. Using an open-jaw spanner, lightly tighten the nut (2) and slowly
unscrew the screw (1) until the tension disks (4) are closed.

13. Unscrew the screw (1) a further approx. ¼ turn counterclockwise.

14. Tap on ESC.

15. Tap on Calibration 3.

16. Hold the screw (1) still with a screwdriver, and tighten the nut (2). Once
again, take care the disk (3) does not turn with the nut.

17. Tap on ESC and check that the tension disks (4) open easily.

18. Tap on Calibration 1 and check the closure of the tension disks.

19. Repeat the procedure for the 2nd thread tensioner.

Service Instructions 911-211 - 00.0 - 02/2015 41

Machine head

(5) - Thread lever (6) - Thread spring balance

⑤

⑥

Calibrating the thread tensioner

Fig. 36: Calibrating the thread tensioner

1. Thread the sewing thread 8/3 times and on to the thread lever (5).

2. With Calibration 1 selected, measure the thread tension with a
thread spring balance (6).

3. Input the measured value into the controller and confirm it with OK.

4. Perform the measurement and input also for Calibration 2 and
Calibration 3.

Checking the calibration

1. Input the percentage value = 50 in the Thread tension menu.

2. Press the On button to switch on the tension.

3. Test the tension using a thread spring balance: Setpoint: 1000 cN.
If necessary, other percentage values can be input.

4. If variations greater than ±10 % are found: Set the thread tensions
once again and repeat the calibration.

5. If the variations persist: Clean any dirt from the thread tensioners includ­ing the magnets.

42 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

6

4

1

2

3

5

(1) - Counter blade
(2) - Thread-pulling knife
(3) - Hook bearing

(4) - Blade holder
(5) - Distance
(6) - Screw

4.8 Thread cutter

4.8.1 Setting the height of the thread-pulling knife

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch the machine off before you check and set
the height of the thread-pulling knife.

The height of the thread-pulling knife is factory-set such that the
distance (5) between the upper edge of the blade holder (4) and the hook
bearing screw-on surface (3) is 10.7+
by means of washers between the blade holder (4) and the thread-pulling
knife (2).

0.05 mm. Fine adjustment is made

When changing the knives make sure that you do not lose the washers.

Proper setting

The thread-pulling knife (2) pivots as close as possible above the hook
and is at the same height as the counter blade (1).

Fig. 37: Setting the height of the thread-pulling knife

Setting steps

Service Instructions 911-211 - 00.0 - 02/2015 43

1. Loosen the screw (6).

2. Remove the thread-pulling knife (2).

3. Place as many washers between the thread-pulling knife (2) and the

blade holder (4) that the upper edges of the counter blade (1) and thread­pulling knife (2) are at the same height.

4. Non-required washers on the top side between the thread-pulling

knife (2) and screw (6) should be kept.

5. Screw down the thread-pulling knife (2) using screw (6).

Machine head

(1) - Roller
(2) - Setscrews
(3) - Clamping ring
(4) - Control cam

(5) - Setscrews
(6) - Highest point
(7) - Clamping screw
(8) - Actuating lever
(9) - Solenoid

⑧

⑨

⑥

①

③

②

④

⑤

⑦

4.8.2 Setting the cutoff curve

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before aligning the thread­pulling knife sideways.

Proper setting

The control cam (4) makes direct contact with the clamping ring (1).

The distance between the widest extent (6) of the control cam (4) and the
roller (3) is 0.1 mm at most.

In resting position, the circle mark on the cutting edge of the thread-pulling
knife is exactly next to the tip of the counter blade.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10)

• Bobbin flap ( 3.3.7 Opening and closing the bobbin flap, p. 13)

Fig. 38: Aligning the thread-pulling knife sideways - Part 1

Setting steps

1. Loosen all 4 setscrews (2) on the clamping ring (3).

2. Push the clamping ring (3) towards the hook bearing as far as it will go.

3. Tighten all 4 setscrews (2) on the clamping ring (3).

Screw the 4 setscrews (2) tightly in place on the clamping ring (3)
before you loosen the setscrews (5). The clamping ring (3) and control
cam (4) are both mutually used as a stop and should not be undone at
the same time.

4. Loosen the setscrews (5).

5. Press the actuating lever (8) against the solenoid (9).

44 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

<

0

,

.

+

^

(10) - Screw
(11) - Counter blade
(12) - Thread-pulling knife

(13) - Screw
(14) - Hook thread clamp
(15) - Screw

6. Turn the control cam (4) until its highest point is next to the roller (1).

7. Move the control cam (4) such that the distance between its highest

point (6) and the roller (1) is 0.1 mm at most.

8. Tighten the setscrews (5).

9. Loosen the clamping screw (7) on the actuating lever (8).

Fig. 39: Aligning the thread-pulling knife sideways - Part 2

10. Turn the thread-pulling knife (12) such that the circle mark is exactly
next to the tip of the counter blade (11).

11. Tighten the clamping screw (7) on the actuating lever (8) such that the
actuating lever (8) has no axial play.

12. Loosen all 4 setscrews (2) on the clamping ring (3).

13. Push the clamping ring (3) to the right as far as it will go and against
the control cam (4).

14. Check the loop stroke position ( p. 21).

15. Tighten all 4 setscrews (2) on the clamping ring (3).

4.8.3 Setting the cutting pressure

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch the machine off before you check and set
the counter blade and the hook thread clamp.

Service Instructions 911-211 - 00.0 - 02/2015 45

The shape of the thread-pulling knife automatically creates the required
cutting pressure as soon as the thread-pulling knife and counter blade make
contact.

Machine head

(1) - Screw
(2) - Counter blade
(3) - Thread-pulling knife

(4) - Screw
(5) - Hook thread clamp
(6) - Screw

Proper setting

In resting position, the hook thread clamp makes contact with the thread­pulling knife without any pressure being applied. Any 2 threads with the
greatest strength used for sewing can be neatly cut simultaneously.

Faults caused by an incorrect setting

• Increased knife wear when the pressure is too great

• Problems when sewing on if the hook thread clamp is too high

• Problems in cutting the thread

Cover

• Bobbin flap ( 3.3.7 Opening and closing the bobbin flap, p. 13)

Fig. 40: Setting the cutting pressure

1

3

2

6

5

4

Setting steps

1. Press and turn the hand crank until the thread-pulling knife (3) can be

swung out by hand.

2. Loosen the screw (1).

3. Position the thread-pulling knife (3) such that the arrow mark is exactly

next to the tip of the counter blade (2).

4. Turn the hook thread clamp (5) such that it rests against the thread-

pulling knife (3).

5. Turn the counter blade (2) such that it rests against the thread-pulling

knife (3).

6. Tighten the screw (1).

7. Check the position of the cutters, since the counter blade can easily

become warped when the screw is being tightened.

46 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Roller
(2) - Clamping ring
(3) - Control cam

(4) - Setscrews
(5) - Counter blade
(6) - Thread-pulling knife

4.8.4 Setting point in time for cutting

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the point in time for cutting.

Proper setting

The threads are cut when the thread lever is at the top dead center.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10)

• Bobbin flap ( 3.3.7 Opening and closing the bobbin flap, p. 13)

Fig. 41: Setting point in time for cutting

5

1

2

3

4

6

Setting steps

1. Loosen the setscrews (4).

2. Press and turn the hand crank until the thread-pulling knife (6) can be

swung out by hand.

3. Pivot the thread-pulling knife (6) as far forward until the circle mark is

exactly next to the tip of the counter blade (5).

4. Press and turn the hand crank until the thread lever is at the top dead

center.

5. Push the control cam (3) to the left as far as it will go and against the

clamping ring (2).

6. Turn the control cam (3) such that the roller (1) runs up at the contour

of the control cam (3) and the widest extent of the control cam is at the
highest point when the thread lever is at the top dead center.

Service Instructions 911-211 - 00.0 - 02/2015 47

Machine head

(1) - Threads (2) - Burner

①

②

7. Tighten the setscrews (4).

8. Check the setting:

• Insert the thread into thread-pulling knife (6) and slowly press and
turn the hand crank.

• Determine the hand crank position at which the thread is cut.

• Repeat setting steps 1 – 7 if necessary.

4.9 Thread burner (optional)

4.9.1 Adjusting the upper burner

Proper setting

The burner burns the thread off cleanly without damaging the sewing
material.
The burner pivots quickly without coming into contact with the stop.

Cover

• Burner cover ( 3.4 Removing and installing the burner cover (optional),
p. 14)

1. Tap on Tools > Service > Multitest.

2. Tap on Thread burner.

3. Tap on Close clamp.

4. Use Upper burner down to check the movement sequence.

Fig. 42: Basic setting

 Both threads (1) are burnt off and sucked in. The burner (2) is

positioned slightly to the left opposite the needle hole.

48 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(3) - Stop screw (4) - Adjustment setscrew

③

④

(5) - Screws (6) Material thickness scanner

⑥

⑤

Setting the height

Fig. 43: Setting the height

Setting steps

1. Use the stop screw (3) to limit the height of the burner at the bottom.

2. Use the adjustment setscrew (4) to adjust the upper limit such that

there is as little play as possible when the burner is at its topmost
position.

3. Insert the material to be sewn.

4. Check the movement sequence.

5. Adjust the material thickness scanner in relieved condition if necessary:

Fig. 44: Adjusting the material thickness scanner

• Loosen the screws (5) and adjust the height of the material thickness

scanner (6).

Service Instructions 911-211 - 00.0 - 02/2015 49

• Tighten the screws (5).

Machine head

(7) - Screwdriver
(8) - Screw

(9) - Needle thread advancing device

⑦

⑧

⑨

(10) - Stop screw

⑩

Adjusting the needle thread advancing device

Proper setting

The needle thread advancing device pivots quickly while advancing and
slightly pulling back the thread at the same time. It positions the thread for
the suction device. When being burnt off, the thread is not under tension.

Fig. 45: Adjusting the needle thread advancing device

Fig. 46: Setting the swivel angle

1. Loosen the screw (8).

2. Move the needle thread advancing device (9) such that it passes over

the clamp and under the sewing foot when completing its forward
motion.

3. Tighten the screw (8).

4. Use the stop screw (10) to limit the swivel angle.

50 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(11) - Screws
(12) - Burner tip

(13) - Screws

⑪

⑫

⑬

(14) - Choke - upward movement (15) - Choke - downward movement

⑭

⑮

Setting the position of the burner tip

Fig. 47: Setting the position of the burner tip

1. Loosen the screws (11).

2. Adjust the length of the burner tip (12).

3. Tighten the screws (11).

4. Use the screws (13) to make a height adjustment if necessary.

Adjusting the chokes

Fig. 48: Adjusting the chokes

1. Adjust the chokes (14, 15).

Service Instructions 911-211 - 00.0 - 02/2015 51

Machine head

(16) - Angle bracket with screws

⑯

Adjusting the thread suction device

Proper setting

The thread suction device reliably sucks in the thread. Even though posi­tioned closely to the swung-out needle thread advancing device, the
thread suction device does not interfere with the swivel motion performed
by the needle thread advancing device.

Fig. 49: Adjusting the thread suction device I

Setting steps

1. Depending on the clamping system used, adjust the position using the

screws on the corresponding angle bracket (16).

52 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Burner tip
(2) - Screws
(3) - Screws

(4) - Choke - upward movement
(5) - Choke - downward movement

①

②

③

⑤

④

4.9.2 Adjusting the lower burner

Proper setting

The burner burns the thread off cleanly without damaging the sewing
material.
The movement is quick.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10

Fig. 50: Adjusting the lower burner

)

Setting steps

1. Loosen the screws (2).

2. Tap on Tools > Service > Multitest.

3. Tap on Thread burner.

4. Tap on Close clamp.

5. Use Lower burner up to check the movement sequence.

6. Adjust the height of the burner holder until the burner tip is positioned

closely under the throat plate.

7. Tighten the screws (2).

8. Loosen the screws (3).

9. Move the burner holder sideways until the burner tip is positioned in

the center, as seen from the top through the needle hole.

10. Tighten the screws (3).

11. Adjust the chokes (4, 5).

12. Check the movement sequence and repeat the adjustment if neces-

sary.

Service Instructions 911-211 - 00.0 - 02/2015 53

Machine head

(1) - Screws (2) - Burner tip

①

②

①

②

4.9.3 Changing the burner tips

WARNING

Risk of injury!

Risk of sustaining burns at hot burner tip.
Never touch the burner tip.

Cover

• Burner cover ( 3.4 Removing and installing the burner cover (optional),

)

p. 14

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10)

Fig. 51: Changing the burner tips

Setting steps

1. Loosen the screws (1).

2. Change the burner tips (2).

3. Tighten the screws (1).

4. Tap on Tools > Service > Multitest > Thread burner.

5. Use Burner on to verify that the burner tip is glowing (turns off auto-

matically after 10 s).

54 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Thread advancing device
(2) - Carrier
(3) - Body casting
(4) - Roller
(5) - Clamping ring

(6) - Control cam
(7) - Lever
(8) - Setscrew
(9) - Clamping screw

③⑤④⑥

⑦

⑧

⑨

①

②

4.9.4 Adjusting the thread advancing device

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and adjust­ing the thread advancing device.

Fig. 52: Adjusting the thread advancing device

Proper setting

• When the thread advancing device (1) is at rest, the distance between

the highest point of the control cam (6) and the roller (4) is 0.1 mm

• The control cam (6) makes contact with the clamping ring (5)

• The carrier (2) must have no axial play, but still run smoothly

Setting steps

1. Slacken all 4 setscrews on the clamping ring (5).

2. Push the clamping ring (5) towards the hook bearing as far as it will go.

3. Tighten all 4 setscrews on the clamping ring (5).

4. Release both setscrews on the control cam (6).

5. Turn the lever (7) so that the setscrew (8) on the body casting (3) strikes

the hook support.

6. Set the distance between the roller (4) and the highest point of the

control cam (6) to 0.1 mm.

7. Tighten both setscrews on the control cam (6).

8. Release the clamping screw (9) on the lever (7).

Service Instructions 911-211 - 00.0 - 02/2015 55

Machine head

(4) - Roller
(6) - Control cam
(8) - Setscrew
(10) - Locking latch

(11) - Magnet armature
(12) - Nut
(13) - Locking pin

⑩

⑪

⑫

④

⑥

⑧

⑬

9. Turn the thread advancing device (1) until the bobbin can be removed.

10. Tighten the clamping screw (9). Take care to ensure that there is no

axial play.

11. Release all 4 setscrews on the clamping ring (5) and push as far as

they will go and against the control cam (6).

12. Tighten all 4 setscrews on the clamping ring (5).

13. Check the loop stroke.

Setting the locking latch

Fig. 53: Setting the locking latch

Proper setting

1. Press and turn the hand crank until the roller (4) is at the highest point

of the control cam (6).

2. Press against the magnet armature (11).

 The locking latch (10) can be swung out without clamping, and the

distance between the locking latch (10) and locking pin (13) is not
greater than 0.1 mm when the latch is engaged.

Setting steps

1. Release the nut (12).

2. Turn the setscrew (8) and adjust the distance.

3. Tighten the nut (12).

56 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Magnet armature
(2) - Thread advancing device

(3) - Hook thread clamp

②

③

①

4.9.5 Setting the hook thread clamp

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the hook thread clamp.

Cover

• Swiveling up the machine head ( 3.3.1 Access to the machine bot-

tom section, p. 10)

• Bobbin flap ( 3.3.7 Opening and closing the bobbin flap, p. 13)

Fig. 54: Setting the hook thread clamp

Service Instructions 911-211 - 00.0 - 02/2015 57

Proper setting

The thread is held in place, but not clamped.

Setting steps

1. Press against the magnet armature (1) while pressing and turning the

hand crank until the thread advancing device (2) swings out.

2. Insert the end of the hook thread into the thread advancing device.

3. Press and turn the hand crank until the cutter swings back.

4. Check if the thread is held in place without being clamped.

Machine head

(1) - Control cam (2) - Setscrews

①

②

4.9.6 Setting the control cam for the thread advancing device

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before checking and setting
the idle position.

Fig. 55: Setting the control cam for the thread advancing device

Proper setting

The thread advancing device is in its idle position when at the position
"thread lever at top dead center". When the machine is at the position
“thread lever at top dead center” the control cam (1) is at its highest point.

The thread advancing device captures the hook thread, but not the needle
thread. If there are any short pieces of thread in the area of the hook that
have been burnt off on both sides, the thread advancing device will cap­ture the needle thread as well. In this case, the control cam will have to be
corrected to allow the thread advancing device to swing out with a delay.

Setting steps

1. Press the hand crank and turn it to the position "thread lever at top

dead center".

2. Loosen the setscrews (2).

3. Rotate the control cam (1).

4. Tighten the setscrews (2).

58 Service Instructions 911-211 - 00.0 - 02/2015

Machine head

(1) - Bearing with gear pinion
(2) - Setscrews
(3) - Drive

(4) - Screws
(5) - Screw

③

①②

⑤④

4.10 Changing the material presser foot bar

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before removing and fitting
the material presser foot bar.

Cover

• Motor cover ( 3.3.2 Removing and installing the motor cover, p. 11)

Fig. 56: Changing the material presser foot bar I

Service Instructions 911-211 - 00.0 - 02/2015 59

Removal

1. Undo the setscrews (2) and pull out the bearing with the gear pinion (1)

forwards.

2. Dismantle the drive (3).

3. Undo all 3 screws (4) and remove the drive shaft.

4. Loosen the screw (5).

Fig. 57: Changing the material presser foot bar II

(6) - Sleeve
(7) - Material presser foot bar
(8) - Strap

(9) - Screw
(10) - Clamp

⑥⑦⑧⑩⑨

Machine head

5. Place the strap (8) in a horizontal position.

6. Undo the screw (9) and take off the strap (8).

7. Pull the sleeve (6) out.

8. Pull the clamp (10) right up to the top and pull the material presser

bar (7) out upwards.

Fitting

1. Fitting is the reverse of removal.

Sequence

After the drive (3) has been tightened, set the presser foot height
 4.6.5 Setting the presser foot height, p. 36.

60 Service Instructions 911-211 - 00.0 - 02/2015

Sewing machine

(1) - Clamp with test bores
(2) - Center point bore

(3) - Test bore

③

①

②

5 Sewing machine

5.1 Checking the machine zero point

The machine zero point is factory-set to the correct value.

Fig. 58: Checking the machine zero point

Gage required: Clamp with test bore.

1. Tap on Tools > Service > Multitest.

2. Tap on Transport clamp.

3. Fit the clamp (1).

4. Tap on Move to reference position.

 The machine moves to the reference position.

5. Tap on Center point.

 The machine moves to the center position. The needle is positioned

within the center point bore (2), and the tip of the needle can be low­ered into the bore by turning the arm shaft crank.

6. Tap on Test.

 The machine moves to the test position. The center of the needle is

positioned within the test bore (3), and the tip of the needle can be
lowered into the bore by turning the arm shaft crank.

Service Instructions 911-211 - 00.0 - 02/2015 61

5.2 Changing the drives

(1) - Screws
(2) - Toothed belt
(3) - Motor with flange

(4) - Plug
(5) - Screw

③

⑤

④

②

①

5.2.1 X drive

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before changing the drive.

Fig. 59: Changing the X drive

Sewing machine

Removal

1. Disconnect both plugs (4).

2. Undo all four screws (1).

3. Pull off the motor and flange (3).

Fitting

1. Insert a new motor and flange (3) on to the toothed belt (2).

2. Insert all four screws (1) and tighten them loosely.

3. Tension the toothed belt (2) using the screw (5) (384 Hz).

4. Tighten all four screws (1).

5. Connect the plug (4).

62 Service Instructions 911-211 - 00.0 - 02/2015

Sewing machine

(1) - Plug
(2) - Screws
(3) - Screw
(4) - Equipotential bonding

(5) - Toothed belt
(6) - Motor
(7) - Flange

⑤④⑥⑦

③

①

②

5.2.2 Y drive

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

Switch off the machine before changing the drive.

Fig. 60: Changing the Y drive

Removal

1. Disconnect the plug (1).

2. Unscrew the equipotential bonding (4).

3. Undo the screw (3) to release the toothed belt (5) tension.

4. Undo all four screws (2).

5. Pull the motor (6) off the flange (7).

6. Pull off the toothed belt pulley.

Fitting

1. Fit the toothed belt pulley onto the new motor.

2. Insert the motor (6) into the toothed belt (5) and onto the flange (7).

3. Insert all four screws (2) and tighten them loosely.

4. Tension the toothed belt (5) using the screw (3) (185 Hz).

5. Tighten all four screws (2).

6. Connect the plug (1).

7. Tighten the potential bonding (4).

Service Instructions 911-211 - 00.0 - 02/2015 63

Sewing machine

(1) - Gear pinion
(2) - Toothed rack

(3) - Nut
(4) - Screw

①

②

③

④

5.3 Checking the play between the toothed rack and

gear pinion

Fig. 61: Checking the play

Proper setting

There should be no play between the gear pinion (1) and toothed rack (2).

Setting steps

1. Loosen the screw (4).

2. Adjust the nut (3) so that there is no play.

3. Tighten the screw (4).

4. Check the play along the entire length.

 The carriage can be moved without excessive play or stiffness.

64 Service Instructions 911-211 - 00.0 - 02/2015

Maintenance work

6 Maintenance work

6.1 Lubrication

WARNING

Risk of injuries due to contact with oil!

Contact with oil can cause irritation, rashes, aller­gies or skin injuries.

ALWAYS avoid long-term contact with oil.
ALWAYS thoroughly wash the affected areas if

contact with oil occurs.

ATTENTION

Risk of environmental damage from oil!

Oil is a pollutant and must not enter the sewage
system or the soil.

Collect waste oil carefully and dispose of it and oily
machine parts in accordance with the applicable
statutory regulations.

NOTICE

Machine damage possible due to incorrect oil.

An incorrect oil type can cause damage to the machine.
Only use oil that complies with the data in the instructions.

Required oil:

Only DA 10 or equivalent oil should be used for the machine, which has
the following properties:

• Viscosity at 40 °C: 10 mm²/s - ISO VG10

• Flash point: 150 °C

DA 10 can be obtained under the following part number at DA sales
offices:

• 9047 000011 - 250 ml

• 9047 000012 - 1 l

• 9047 000013 - 2 l

• 9047 000014 - 5 l

Service Instructions 911-211 - 00.0 - 02/2015 65

Maintenance work

(1) - Refill opening (2) - Maximum level marking

(3) - Minimum level marking

6.1.1 Lubrication - machine head

The central oil lubrication system supplies all bearing positions automati­cally with oil from the reservoir.

NOTICE

Machine damage due to incorrect oil level

Too little or too much oil can damage the machine.
Check the oil level every day and top off the oil if necessary.

Proper setting

The oil level is between the minimum level marking and the maximum
level marking.

Fig. 62: Lubrication - machine head

1

MAX

2

MIN

Setting steps

1. Check the oil level indicator every day.

2. If the oil level is below the minimum level marking (3):
Pour oil through the refill opening (1) but no higher than the maximum
level marking (2).

Information

Check the oil level after each extended machine standstill time. If it is
necessary to top off the oil:

• Top off the oil to no higher than the minimum level marking.

• Allow the machine to perform 50 cycles, then check the oil level again.

• If necessary, top off the oil to the maximum level marking

3

66 Service Instructions 911-211 - 00.0 - 02/2015

Maintenance work

(1) - Hook (2) - Screw

①

②

6.1.2 Lubrication - hook

WARNING

Risk of injury!

Risk of crushing injuries and stab wounds from
sharp and moving parts.

When holding the blotting paper, make sure that
you do not reach into the hook or below the needle
and the sewing feet.

Switch off the sewing machine before adjusting the
hook lubrication.

The approved oil quantity for hook lubrication is a factory specification.

Proper setting

1. Hold a sheet of blotting paper near to the hook (1) when sewing.

 After sewing a stretch of approx. 1 m, the blotting paper will have been

sprayed with a thin and even film of oil.

Fig. 63: Setting the hook lubrication

Setting steps

1. Turn the screw (2):

• Turn counterclockwise: more oil is released

• Turn clockwise: less oil is released

The released amount of oil does not change until the operating time
has run a few minutes. Sew for several minutes before you check the
setting again.

Service Instructions 911-211 - 00.0 - 02/2015 67

Maintenance work

0

2

8

4

6

10

2

1

(1) - Pressure controller (2) - Pressure indicator

6.2 Thread suction device

Proper setting

The thread is sucked in properly. Check on a regular basis if the thread
suction device sucks in the thread properly without the walls of the hose
sticking together.

Setting steps

1. As soon as the thread is no longer sucked in properly, blow talcum
powder into the hose through the opening of the thread suction device.

6.3 Pneumatic system

6.3.1 Setting operating pressure

Proper setting

The operating pressure is 6 bar.
Check the pressure on the pressure indicator every day. The pressure

cannot deviate by more than 1 bar.

NOTICE

Machine damage due to incorrect pressure

Incorrect pressure can result in damage to the machine. Make sure
that the machine is only used when the operating pressure is set
correctly.

Fig. 64: Setting operating pressure

Setting steps

1. Pull the pressure controller (1) up.

2. Turn the pressure controller until the pressure indicator (2) indicates
6 bar:

• clockwise: to increase pressure

• counterclockwise: to reduce pressure

68 Service Instructions 911-211 - 00.0 - 02/2015

3. Push the pressure controller (1) down.

Maintenance work

0

2

8

4

6

10

2

3

1

(1) - Filter element
(2) - Water separator

(3) - Drain screw

6.3.2 Draining the water condensation

Water condensation may accumulate in the water separator of the pres­sure controller.

Proper setting

Water condensation cannot rise up to the filter element (1).
Check the water level in the water separator on a daily basis.

WARNING

Risk of injury

Switch off the machine at the main switch and
disconnect it from the pneumatic network before
you drain the water from the water separator.

NOTICE

Machine damage due to too much water

Too much water can result in damage to the machine.
Check the water level every day and drain water, if necessary.

Fig. 65: Draining the water condensation

Maintenance steps

1. Place the collection tray under the drain screw (3).

2. Unscrew the drain screw (3) completely.

3. Allow water to drain into the collection tray.

4. Tighten the drain screw (3).

Service Instructions 911-211 - 00.0 - 02/2015 69

Maintenance work

(1) - Filter element
(2) - Water separator

(3) - Drain screw

0

2

8

4

6

10

2

3

1

6.3.3 Cleaning the filter element

WARNING

Risk of injury

Switch off the machine and disconnect it from the
pneumatic network before you clean the filter
element.

NOTICE

Damage to the paintwork due to solvent-based cleaners.

Solvent-based cleaners damage the filter.
Use only solvent-free substances for washing out the filter tray.

Fig. 66: Cleaning the filter element

70 Service Instructions 911-211 - 00.0 - 02/2015

Cleaning steps

1. Drain the water condensation ( p. 69).

2. Unscrew the water separator (2).

3. Unscrew the filter element (1).

4. Blow out the filter element (1) using a compressed air gun.

5. Wash out the filter tray using benzine.

6. Tighten the filter element (1).

7. Tighten the water separator (2).

8. Tighten the drain screw (3).

Maintenance work

(1) - Area around the needle
(2) - Hook

(3) - Area under the throat plate
(4) - Cutter on the bobbin winder

6.4 Cleaning work

6.4.1 Cleaning the machine

Lint and thread remnants should be removed after every 8 hours of oper­ation using a compressed air gun or a brush. If very fluffy material is being
sewn the machine must be cleaned more frequently.

WARNING

Risk of injury

Switch off the machine before cleaning the ma­chine.

Flying particles can get in the eyes, causing injury.
Hold the compressed air gun so that the particles

do not fly close to people.
Make sure no particles fly into the oil pan.

NOTICE

Damage to the paintwork due to solvent-based
cleaners.

Solvent-based cleaners will damage paintwork.
Only use solvent-free substances for cleaning.

Fig. 67: Areas requiring special cleaning

4

1

2

3

Areas particularly susceptible to soiling:

• Cutter on the bobbin winder for the hook thread (4)

• Area under the throat plate (3)

• Hook (2)

• Area around the needle (1)

Service Instructions 911-211 - 00.0 - 02/2015 71

Cleaning steps

1. Remove any dust and thread remains using a compressed air gun or
a brush.

Maintenance work

(1) - Motor fan mesh

①

6.4.2 Cleaning the motor fan mesh

The motor fan mesh must be cleaned once a month using a compressed
air gun. When very fluffy material is used for sewing, the motor fan mesh
must be cleaned more frequently.

WARNING

Risk of injury

Switch off the machine before cleaning the motor
fan mesh.

Flying particles can get in the eyes, causing injury.
Hold the compressed air gun so that the particles

do not fly close to people.

Fig. 68: Cleaning the motor fan mesh

Cleaning steps

1. Remove any sewing dust and thread remains using a compressed air
gun.

6.5 Checking the toothed belt

WARNING

Risk of injury!

Crushing injuries from moving parts.
Switch off the machine before checking the

condition of the toothed belt.

The condition of the toothed belt must be checked once a month.
A damaged toothed belt must be replaced immediately.

Proper setting

• The toothed belt exhibits no cracks or fragile areas.

• When pressed with a finger, the toothed belt must yield no more than

10 mm.

72 Service Instructions 911-211 - 00.0 - 02/2015

DÜRKOPP ADLER AG
Potsdamer Str. 190
33719 Bielefeld, Germany
Germany
Phone: [phone]
Email: [e-mail]
www.duerkopp-adler.com

Subject to design changes - Printed in Germany - © Dürkopp Adler AG - Service Instructions - 0791 911641 EN - 00.0 - 02/2015