969
Se rvice 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,
including extracts, is prohibited without the prior written approval of Dürkopp Adler AG.
Copyright © Dürkopp Adler AG 2019
Table of Contents
1 About these instructions ........................................................... 5
1.1 For whom are these instructions intended?.................................. 5
1.2 Representation conventions – symbols and characters............... 5
1.3 Other documents .......................................................................... 7
1.4 Liability.......................................................................................... 7
2 Safety........................................................................................... 9
2.1 Basic safety instructions ............................................................... 9
2.2 Signal words and symbols used in warnings.............................. 10
3 Working basis ........................................................................... 13
3.1 Order of the settings ................................................................... 13
3.2 Laying the cables........................................................................ 13
3.3 Removing and assembling covers.............................................. 14
3.3.1 Access to the underside of the machine..................................... 14
3.3.2 Removing the arm cover ............................................................ 15
3.3.3 Removing the head cover........................................................... 16
3.3.4 Removing the cover plate........................................................... 17
3.3.5 Removing the belt cover............................................................. 17
3.3.6 Removing the thread tension plate............................................. 18
3.3.7 Disassembling the throat plate ................................................... 19
3.3.8 Disassembling and assembling the feed dog ............................. 20
3.4 Flats on shafts ............................................................................ 21
3.5 Axial play for shafts running in plain bearings ............................ 22
3.6 Locking the machine in place ..................................................... 22
3.7 Setting the handwheel into position............................................ 24
4 Positioning the arm shaft......................................................... 25
5 Setting the handwheel scale ................................................... 26
6 Setting the drive ....................................................................... 27
6.1 Setting the drive ratio (Classic)................................................... 27
6.1.1 Disassembling the V-ribbed belt................................................. 27
6.1.2 Setting the drive pulley ............................................................... 28
6.1.3 Setting the belt tension ............................................................... 29
6.2 Setting the drive ratio (heavy transport) ..................................... 30
6.2.1 Disassembling the V-ribbed belt................................................. 30
6.2.2 Setting the drive pulley ............................................................... 31
6.2.3 Setting the belt tension ............................................................... 32
6.3 Setting the positioning of the machine........................................ 33
6.3.1 Importing the drive ratio into the control program....................... 33
6.3.2 Setting the reference position of the handwheel ........................ 34
7 Setting the stitch length adjusting wheel............................... 35
7.1 Setting the upper stitch length adjusting wheel .......................... 36
7.2 Setting the lower stitch length adjusting wheel........................... 37
7.3 Setting the stitch length limit....................................................... 38
7.4 Setting the eccentric for the forward and backward stitches ...... 39
8 Setting the feed dog ................................................................. 40
8.1 Setting the feed dog position ...................................................... 40
8.1.1 Moving the feed dog carrier in sewing direction ......................... 41
Service Instructions 969 - 06.0 - 03/2019 1
Table of Contents
8.1.2 Moving the feed dog sideways ................................................... 42
8.2 Setting the feed dog movement.................................................. 43
8.2.1 Setting the feed movement......................................................... 43
8.2.2 Setting the feed dog height at top dead center........................... 44
8.2.3 Setting the feed dog stroke movement....................................... 45
8.3 Setting the feeding eccentric with adjusting tube ....................... 46
9 Aligning the needle bar linkage............................................... 48
9.1 Moving the needle bar linkage sideways.................................... 48
9.2 Aligning the needle bar linkage in the sewing direction.............. 50
10 Position of the hook and needle ............................................. 51
10.1 Tensioning the hook drive toothed belt....................................... 51
10.2 Setting the dead center of the reciprocating hook movement .... 52
10.3 Setting the loop stroke position .................................................. 54
10.4 Setting the hook clearance ......................................................... 55
10.5 Setting the needle guard ............................................................ 57
10.6 Setting the loop former ............................................................... 58
10.7 Setting the needle bar height...................................................... 59
11 Setting the sewing feet ............................................................ 61
11.1 Setting the sewing foot feed ....................................................... 61
11.1.1 Setting the zero stroke of the sewing feet and the tension
force of the torsion spring ........................................................... 61
11.1.2 Setting the drive dog of the presser foot bar .............................. 63
11.1.3 Setting the feed stroke of presser foot and sewing foot ............. 64
11.1.4 Setting the stroke movement for the feeding foot....................... 66
11.2 Setting the foot stroke................................................................. 67
11.2.1 Setting the foot stroke using the hand lever ............................... 67
11.2.2 Setting the foot stroke using the pneumatic cylinder .................. 68
12 Setting the thread system........................................................ 69
12.1 Setting the thread tension spring................................................ 69
12.2 Setting the winder....................................................................... 70
12.3 Setting the hook thread guide..................................................... 74
13 Setting the thread cutter .......................................................... 75
13.1 Setting the thread cutter timing................................................... 75
13.2 Setting the initial position of the thread cutter and the position
of the thread-pulling knife ........................................................... 76
13.3 Setting the pneumatic cylinder lever........................................... 81
13.4 Setting the cutting pressure........................................................ 82
13.5 Setting the hook thread clamp.................................................... 83
14 Soft start.................................................................................... 84
15 Programming ............................................................................ 85
16 Maintenance.............................................................................. 91
16.1 Cleaning ..................................................................................... 92
16.2 Lubricating .................................................................................. 94
16.3 Servicing the pneumatic system................................................. 96
16.3.1 Setting the operating pressure ................................................... 96
16.3.2 Draining the water condensation ................................................ 97
2 Service Instructions 969 - 06.0 - 03/2019
Table of Contents
16.3.3 Cleaning the filter element.......................................................... 98
16.4 Lubricating the needle bar .......................................................... 99
16.5 Securing the shafts of the stitch length adjusting wheels......... 100
16.6 Parts list.................................................................................... 102
17 Decommissioning................................................................... 103
18 Disposal................................................................................... 105
19 Troubleshooting ..................................................................... 107
19.1 Customer Service ..................................................................... 107
19.2 Messages of the software......................................................... 107
19.3 Errors in sewing process .......................................................... 113
20 Technical data......................................................................... 115
21 Appendix ................................................................................. 117
Service Instructions 969 - 06.0 - 03/2019 3
Table of Contents
4 Service Instructions 969 - 06.0 - 03/2019
About these instructions
1 About these instructions
These instructions have been prepared with utmost care. They contain
information and notes intended to ensure long-term and reliable operation.
Should you notice any discrepancies or if you have improvement
requests, then we would be glad to receive your feedback through
Customer Service ( p. 107).
Consider these instructions as part of the product and keep it easily
accessible.
1.1 For whom are these instructions intended?
These instructions are intended for:
With regard to minimum qualification and other requirements to be met by
personnel, please also follow the chapter Safety ( p. 9).
• Specialists:
This group has the appropriate technical training for performing
maintenance or repairing malfunctions.
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
Specifies proper setting.
Disturbances
Specifies the disturbances that can occur from an incorrect setting.
Cover
Specifies which covers must be disassembled in order to access the
components to be set.
Service Instructions 969 - 06.0 - 03/2019 5
About these instructions
1.
2.
…
•
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:
First step
Second step
The steps must always be followed in the specified order.
Lists are marked by bullet points.
Result of performing an operation
Change to the machine or on the display/control panel.
Important
Special attention must be paid to this point when performing a step.
Information
Additional information, e.g. on alternative operating options.
Order
Specifies the work to be performed before or after a setting.
References
Reference to another section in these instructions.
Safety Important warnings for the user of the machine are specifically marked.
Since safety is of particular importance, hazard symbols, levels of
danger and their signal words are described separately in the chapter
Safety ( p. 9).
Location
information
If no other clear location information is used in a figure, indications of right
or left are always from the user's point of view.
6 Service Instructions 969 - 06.0 - 03/2019
About these instructions
1.3 Other documents
The machine includes components from other 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 the built-in components is described
in the corresponding manufacturer's instructions.
1.4 Liability
All information and notes in these instructions have been compiled in
accordance with the latest technology and the applicable standards and
regulations.
Dürkopp Adler cannot be held liable for any damage resulting from:
• Breakage and damage during transport
• Failure to observe these instructions
• Improper use
• Unauthorized modifications to the machine
• Use of untrained personnel
• Use of unapproved parts
Transport
Dürkopp Adler cannot be held liable for breakage and transport damages.
Inspect the delivery immediately upon receiving it. Report any damage
to the last transport manager. This also applies if the packaging is not
damaged.
Leave machines, equipment and packaging material in the condition in
which they were found when the damage was discovered. This will ensure
any claims against the transport company.
Report all other complaints to Dürkopp Adler immediately after receiving
the product.
Service Instructions 969 - 06.0 - 03/2019 7
About these instructions
8 Service Instructions 969 - 06.0 - 03/2019
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 the safety instructions. Failure to do so
can result in serious injury and property damage.
2.1 Basic safety instructions
The machine may only be used as described in these instructions.
These instructions must be available at the machine's location at all times.
Work on live components and equipment is prohibited. Exceptions are
defined in the DIN VDE 0105.
For the following work, switch off the machine at the main switch or
disconnect the power plug:
• Replacing the needle or other sewing tools
• Leaving the workstation
• Performing maintenance work and repairs
• Threading
Missing or faulty parts could impair safety and damage the machine.
Only use original parts from the manufacturer.
Transport Use a lifting carriage or forklift to transport the machine. Raise the
machine max. 20 mm and secure it to prevent it from slipping off.
Setup The connection cable must have a power plug approved in the relevant
country. The power plug may only be assembled to the connection cable
by qualified specialists.
Obligations
of the operator
Follow the country-specific safety and accident prevention regulations and
the legal regulations concerning industrial safety and the protection of the
environment.
All the warnings and safety signs on the machine must always be in legible
condition. Do not remove!
Missing or damaged warnings and safety signs must be replaced
immediately.
Requirements
to be met by
the personnel
Only qualified specialists may:
• Setting up the machine
• Performing maintenance work and repairs
• Performing work on electrical equipment
Only authorized persons may work on the machine and must first have
understood these instructions.
Service Instructions 969 - 06.0 - 03/2019 9
Safety
Operation Check the machine during operating for any externally visible damage.
Stop working if you notice any changes to the machine. Report any changes to your supervisor. Do not use a damaged machine any further.
Safety
equipment
Safety equipment should not be removed or deactivated. If it is essential
to remove or deactivate safety equipment for a repair operation, it must be
assembled and put back into operation immediately afterward.
2.2 Signal words and symbols used in warnings
Warnings in the text are distinguished by color bars. The color scheme is
based on the severity of the danger. Signal words indicate the severity of
the danger.
Signal words Signal words and the hazard they describe:
Signal word Meaning
DANGER (with hazard symbol)
If ignored, fatal or serious injury will result
WARNING (with hazard symbol)
If ignored, fatal or serious injury can result
CAUTION (with hazard symbol)
If ignored, moderate or minor injury can result
CAUTION (with hazard symbol)
If ignored, environmental damage can result
NOTICE (without hazard symbol)
If ignored, property damage can result
Symbols The following symbols indicate the type of danger to personnel:
Symbol Type of danger
General
Electric shock
10 Service Instructions 969 - 06.0 - 03/2019
Safety
Symbol Type of danger
Puncture
Crushing
Environmental damage
Examples Examples of the layout of 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
serious or even fatal injury 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
moderate or minor injury if the warning is ignored.
Service Instructions 969 - 06.0 - 03/2019 11
Safety
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
environmental damage if ignored.
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
property damage if ignored.
12 Service Instructions 969 - 06.0 - 03/2019
Working basis
3 Working basis
3.1 Order of the settings
The setting positions for the sewing machine are interdependent.
Always comply with the order of individual setting steps as specified.
It is absolutely essential that you follow all notices regarding prerequisites
and subsequent settings that are marked with in the margin.
NOTICE
Property damage may occur!
Machine damage from incorrect order.
It is essential to follow the working order specified in these
instructions.
3.2 Laying the cables
NOTICE
Property damage may occur!
Excess cables can impair the functioning of moving machine parts.
This impairs the sewing function and can result in damage.
Lay excess cables as described.
To lay the cables:
1. Lay any excess cabling neatly in proper cable snakes.
2. Bind together the cable loops with cable ties.
Tie loops wherever possible to fixed parts.
Important
The cables must be secured firmly.
3. Cut off any overlapping cable ties.
Service Instructions 969 - 06.0 - 03/2019 13
Working basis
①
②
③
3.3 Removing and assembling covers
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before removing or
re-assembling covers.
For many types of setting work, you will have to remove the machine
covers first in order to access the components. Each explanation of a
setting step includes information on which cover to remove.
This chapter describes how to remove the individual covers. The covers
need to be refitted in reverse order. Re-installation will, therefore, not be
described unless special requirements have to be followed.
3.3.1 Access to the underside of the machine
Cover
To access the components on the underside of the machine, swivel up
the machine head.
Fig. 1: Access to the underside of the machine
(1) - Machine head
(2) - Bartack
(3) - Lever
14 Service Instructions 969 - 06.0 - 03/2019
Working basis
④
⑤
①
②
③
Tilting the machine head
To tilt the machine head:
1. Lift the lever (3).
2. Tilt the machine head (1) as far as it will go.
Erecting the machine head
To erect the machine head:
1. Erect the machine head.
For safety reasons, the machine head (1) is stopped by the bolt (2).
2. Lift the lever (3) and erect the machine head (1) completely.
3.3.2 Removing the arm cover
If necessary, each of the two covers can be removed separately.
Fig. 2: Removing the arm cover
(1) - Right adjusting wheel
(2) - Left adjusting wheel
(3) - Left arm cover
Removing the left arm cover
To remove the left arm cover:
1. Turn left adjusting wheel (2) to position 0.
2. Turn right adjusting wheel (1) to position 8.
(4) - Right arm cover
(5) - Lever
Important
The cover cannot be disassembled unless the adjusting wheels are set to
the proper position.
3. Loosen the screws on the left arm cover (3).
4. Lift the left arm cover (3) up and off.
Service Instructions 969 - 06.0 - 03/2019 15
Working basis
①
②
Removing the right arm cover
To remove the right arm cover:
1. Loosen the screws on the right arm cover (4).
2. Raise the right arm cover (4) and disconnect the power plug for the
fan that is attached to the underside of the cover.
3. Lift the right arm cover (4) up and off.
3.3.3 Removing the head cover
Fig. 3: Removing the head cover
(1) - Head cover (2) - Screws
To remove the head cover:
1. Loosen the screws (2).
2. Remove the head cover (1).
16 Service Instructions 969 - 06.0 - 03/2019
Working basis
①
②
①
②
③
④
3.3.4 Removing the cover plate
Fig. 4: Removing the cover plate
(1) - Cover plate (2) - Screws
To remove the cover plate:
1. Loosen the screws (2).
2. Remove the cover plate (1).
3.3.5 Removing the belt cover
Fig. 5: Removing the belt cover
(1) - Screws
(2) - Handwheel
To remove the belt cover:
(3) - Belt cover
(4) - Screws
1. Loosen the screws (1).
Service Instructions 969 - 06.0 - 03/2019 17
2. Remove the handwheel (2).
②
③
①
②
3. Loosen the screws (4).
4. Remove the belt cover (3).
3.3.6 Removing the thread tension plate
Fig. 6: Removing the thread tension plate
Working basis
(1) - Thread tension plate
(2) - Screws
To remove the thread tension plate:
1. Remove the right arm cover (3) ( p. 15).
Important
The thread tension plate is connected to cables and hoses that are
attached below the upper right arm cover.
2. Loosen the screws (2).
3. Remove the thread tension plate (1).
(3) - Right arm cover
18 Service Instructions 969 - 06.0 - 03/2019
Working basis
①
②
①
3.3.7 Disassembling the throat plate
CAUTION
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before you disassemble
the throat plate.
Fig. 7: Disassembling the throat plate
(1) - Screws (2) - Throat plate
To disassemble the throat plate:
1. Swivel up the sewing foot.
2. Loosen the screws (1).
3. Remove the throat plate (2).
Service Instructions 969 - 06.0 - 03/2019 19
3.3.8 Disassembling and assembling the feed dog
③
①
②
CAUTION
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before disassembling
the feed dog.
Fig. 8: Disassembling and assembling the feed dog
Working basis
(1) - Feed dog
(2) - Feed dog carrier
Disassembling the feed dog
To disassemble the feed dog:
1. Disassemble the throat plate ( p. 19).
2. Loosen the screws (3).
3. Remove the feed dog (1) from the feed dog carrier (2).
Assembling the feed dog
To assemble the feed dog:
1. Insert the feed dog (1)
2. Slightly tighten the screws (3).
3. Assemble the throat plate.
4. Set the feed dog (1) so that it has an equal amount of play on both
sides when inside the throat plate.
5. Tighten the screws (3).
(3) - Screws
20 Service Instructions 969 - 06.0 - 03/2019
Working basis
①
②
3.4 Flats on shafts
Fig. 9: Flats on shafts
(1) - Shaft (2) - Flat
Some shafts (1) have flat surfaces (2) at the points where components
are screwed on with adjusting screws. These flats increase the stability of
the connection and allow the component to be assembled to the shaft at
an angle.
Important
Always ensure that the screw faces are completely flush with the surface.
If the component to be assembled has several screws all around, while
the shaft only possesses one flat, the first screw should be located in
the shaft's direction of rotation.
Service Instructions 969 - 06.0 - 03/2019 21
3.5 Axial play for shafts running in plain bearings
①
②
③
④
Fig. 10: Axial play for shafts running in plain bearings
Working basis
(1) - Plain bearing
(2) - Shaft
Shafts (2) running in plain bearings (1) are axially adjusted when the lever
(3) and the adjusting ring (4) touch the front face of the plain bearing (1).
Important
When setting components mounted on shafts running in plain bearings,
always ensure that the axial play of these shafts is as small as possible,
or 0.
(3) - Lever
(4) - Adjusting ring
3.6 Locking the machine in place
Some settings allow for the sewing machine to be locked in place at the
setting position. To do this, the locking peg from the accessory pack is
inserted into a slot on the arm shaft crank, blocking the arm shaft.
There are 2 locking positions:
• Position 1: Loop stroke position
• 5 mm end in the large slot
• Setting the loop stroke and needle bar height
• Position 2: Handwheel zero position
• 3 mm end in the small slot
• Setting the handwheel position and checking the bottom dead
center for the needle bar
22 Service Instructions 969 - 06.0 - 03/2019
Working basis
①
②
③
Fig. 11: Locking the machine in place
(1) - Slot
(2) - Locking peg
Locking the machine in place
To lock the machine in place:
1. Turn the handwheel until the appropriate slot (1) is in front of the locking
opening (3):
• Smaller slot at handwheel position 180°
• Larger slot at handwheel position 206°
2. Insert the locking peg (2) with the appropriate end into the slot (1).
Removing the lock
To remove the lock:
1. Pull the locking peg (2) out of the slot (1).
(3) - Locking opening
Service Instructions 969 - 06.0 - 03/2019 23
Working basis
①
②
3.7 Setting the handwheel into position
Some settings require that the specified handwheel position be set using
the angle scale.
Fig. 12: Setting the handwheel into position
(1) - Scale (2) - Marking
To set the handwheel into position:
1. Turn the handwheel until the specified number on the scale (1) is next
to the marking (2).
24 Service Instructions 969 - 06.0 - 03/2019
Positioning the arm shaft
①
4 Positioning the arm shaft
Proper setting
The threaded pins (1) are seated flush on the flat of the arm shaft.
The arm shaft crank is flush with the machine casting.
Cover
• left arm cover( p. 15).
Fig. 13: Positioning the arm shaft
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before positioning the arm
shaft.
(1) - Threaded pins
To position the arm shaft:
1. Loosen the threaded pins (1) on the arm shaft crank.
2. Turn the arm shaft crank so that the threaded pins (1) are seated flush
on the flat of the arm shaft.
3. Tighten the threaded pins (1).
Service Instructions 969 - 06.0 - 03/2019 25
Setting the handwheel scale
③
①②
5 Setting the handwheel scale
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before you set the
handwheel scale.
Proper setting
The machine is locked in place at position 2 by the locking peg ( p. 22).
The handwheel is at the 180° position.
Cover
• Belt cover ( p. 17)
Fig. 14: Setting the handwheel scale
(1) - Screws
(2) - Handwheel
To set the handwheel scale:
1. Disassemble the V-ribbed belt ( p. 27).
2. Loosen the screws (1).
3. Assemble belt cover and handwheel.
4. Lock the machine in place at position 2 ( p. 22).
5. Move the handwheel into the 180° position.
6. Slide a hexagonal wrench through the slot (3) and tighten the adjusting
screw.
7. Remove belt cover and handwheel( p. 17).
8. Tighten the screws (1).
9. Assemble the V-ribbed belt.
10. Assemble belt cover and handwheel.
(3) - Slot
26 Service Instructions 969 - 06.0 - 03/2019
Setting the drive
①
②
③
④
6 Setting the drive
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before setting the drive.
6.1 Setting the drive ratio (Classic)
The machine is equipped with a 2-step pulley, which can be used to adjust
the drive ratio between the drive motor and the machine, and increase
the penetration force of the needle.
In order to change the ratio, the drive belts must be disassembled and
the pulley changed to the opposite position. The drive belt is then refitted
and tensioned.
Cover
• Belt cover ( p. 17)
6.1.1 Disassembling the V-ribbed belt
Fig. 15: Disassembling the V-ribbed belt
(1) - V-ribbed belt
(2) - Tensioning roller
(3) - Belt tensioner
(4) - Screws
To disassemble the V-ribbed belt:
1. Loosen the screws (4).
2. Rotate the tensioning roller (2) and belt tensioner (3).
3. Remove the V-ribbed belt (1).
Service Instructions 969 - 06.0 - 03/2019 27
Setting the drive
16 mm
①
②
③
16 mm
higher speed greater penetration force
6.1.2 Setting the drive pulley
Proper setting
Regardless of which side of the drive pulley (2) is being used, there is a
difference in height of 16 mm between the faces of the two pulleys.
Fig. 16: Setting the drive pulley
(1) - Driven pulley
(2) - Drive pulley
(3) - Screws
To set the drive pulley:
1. Loosen the screws (3).
2. Pull the drive pulley (2) off the motor shaft and put it back on the other
way round.
3. Set a height difference of 16 mm between the faces of the drive
pulley (2) and the driven pulley (1).
4. Tighten the screws (3).
28 Service Instructions 969 - 06.0 - 03/2019
Setting the drive
④
⑤
⑥
⑦
②③
①
6.1.3 Setting the belt tension
Proper setting
The belt must be tight enough not to deflect by more than approx. 2mm
if pressure is exerted at the checking point.
Fig. 17: Setting the belt tension
(1) - Checking point
(2) - Hexagon slot
(3) - Belt tensioner
(4) - Screws
To set the belt tension:
1. Insert the V-ribbed belt (7).
2. Turn the tensioning roller (6) with the belt tensioner (3) against the
V-ribbed belt (7).
3. Insert a hexagonal wrench into the hexagon slot (2).
4. Tension the V-ribbed belt (7).
5. Tighten the screws (4).
6. Check and, if necessary, correct the belt tension.
(5) - Drive pulley
(6) - Tensioning roller
(7) - V-ribbed belt
Service Instructions 969 - 06.0 - 03/2019 29
6.2 Setting the drive ratio (heavy transport)
①
②
③
④
The machine is equipped with a 1-step pulley.
Cover
• Belt cover ( p. 17).
6.2.1 Disassembling the V-ribbed belt
Fig. 18: Disassembling the V-ribbed belt
Setting the drive
(1) - V-ribbed belt
(2) - Tensioning roller
To disassemble the V-ribbed belt:
1. Loosen the screws (4).
2. Rotate the tensioning roller (2) and belt tensioner (3).
3. Remove the V-ribbed belt (1).
(3) - Belt tensioner
(4) - Screws
30 Service Instructions 969 - 06.0 - 03/2019
Setting the drive
①
②
③
6.2.2 Setting the drive pulley
Proper setting
The pulleys are in alignment.
Fig. 19: Setting the drive pulley
(1) - Driven pulley
(2) - Screws
To set the drive pulley:
1. Loosen the screws (3).
2. Pull the drive pulley (2) off the motor shaft and put it back on the other
way round.
3. The drive pulley (2) and the driven pulley (1) are in alignment.
4. Tighten the screws (3).
(3) - Drive pulley
Service Instructions 969 - 06.0 - 03/2019 31
Setting the drive
④
⑤
⑥
⑦
②③
①
6.2.3 Setting the belt tension
Proper setting
The belt must be tight enough not to deflect by more than approx. 1.5 mm
if pressure is exerted at the checking point.
Fig. 20: Setting the belt tension
(1) - Checking point
(2) - Hexagon slot
(3) - Belt tensioner
(4) - Drive pulley
To set the belt tension:
1. Insert the V-ribbed belt (7).
2. Turn the tensioning roller (6) with the belt tensioner (3) against the
V-ribbed belt (7).
3. Insert a hexagonal wrench into the hexagon slot (2).
4. Tension the V-ribbed belt (7).
5. Tighten the screws (5).
6. Check and, if necessary, correct the belt tension.
(5) - Screws
(6) - Tensioning roller
(7) - V-ribbed belt
32 Service Instructions 969 - 06.0 - 03/2019
Setting the drive
②
①
6.3 Setting the positioning of the machine
The machine will stop automatically at two angular positions on the main
shaft (of the handwheel). To ensure that the machine stops properly at
these positions, you need to set the reference position for the handwheel.
In order to ensure that the reference position is set properly, the drive ratio
between motor and main shaft must be entered correctly into the control
program of the machine.
6.3.1 Importing the drive ratio into the control program
Fig. 21: Importing the drive ratio into the control program
(1) - Control panel OP1000 (2) - Handwheel
To import the drive ratio into the control program:
1. Select parameter setting mode on the OP1000 control panel (1)
and set the parameter t0819 ( Instructions for use DAC basic/
classic).
2. Manually rotate the handwheel (2) by at least 2 turns.
The display on the control panel will show a new value for the drive
ratio.
3. Press the OK button to confirm this new parameter value.
Service Instructions 969 - 06.0 - 03/2019 33
Setting the drive
②
①
6.3.2 Setting the reference position of the handwheel
Proper setting
The reference position is at 105° on the handwheel scale (2).
Fig. 22: Setting the reference position of the handwheel
(1) - Control panel OP1000 (2) - Handwheel
To set the reference position of the handwheel:
1. Select parameter setting mode on the OP1000 control panel (1)
and set the parameter t0810 ( Instructions for use DAC basic/
classic).
2. Manually rotate the handwheel (2) by at least one turn.
3. Set the value 105° on the handwheel.
4. Press the OK button to confirm the set position.
5. Press the ESC button to exit parameter setting mode.
6. Switch off and on the machine again.
34 Service Instructions 969 - 06.0 - 03/2019
Setting the stitch length adjusting wheel
①
②
③
7 Setting the stitch length adjusting wheel
NOTICE
Property damage may occur!
If you turn the shaft too far, parts on the stitch regulator gear may
bend or get stuck.
Turn the shaft carefully and stop as soon as you feel a slight
resistance.
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before you set the stitch
length adjusting wheel.
Fig. 23: Setting the stitch length adjusting wheels
(1) - Button for the stitch length
(2) - Lower stitch length adjusting wheel
The 2 adjusting wheels on the machine column determine the stitch
length.
• Upper adjusting wheel: large stitch length
• Lower adjusting wheel: small stitch length
It is not possible to set a larger stitch length on the lower adjusting wheel
than on the upper adjusting wheel.
It is not possible to set a larger stitch length on the upper adjusting wheel
than on the lower adjusting wheel.
(3) - Upper stitch length adjusting wheel
Service Instructions 969 - 06.0 - 03/2019 35
Setting the stitch length adjusting wheel
③④
⑤
⑥
①
②
To switch over between the stitch lengths: Press the button for the stitch
length on the machine arm (1).
If the upper adjusting wheel is activated, then the button (1) lights up.
Upon switching on the machine, the stitch length adjusting wheel
activated most recently is always active.
Order
Set the upper stitch length adjusting wheel first before setting the lower
stitch length adjusting wheel.
7.1 Setting the upper stitch length adjusting wheel
Proper setting
The upper stitch length adjusting wheel is set to the maximum stitch length
that can be achieved with the built-in sewing equipment.
Fig. 24: Setting the upper stitch length adjusting wheel
(1) - Upper stitch length adjusting wheel
(2) - Screw
(3) - Adjusting mark
To set the upper stitch length adjusting wheel:
1. Switch on the machine.
2. Unthread the needle thread.
3. Press the button on the machine arm.
The button lights up.
The machine switches over to the upper stitch length adjusting
wheel.
4. Hold the upper stitch length adjusting wheel (1) in place using a
wrench (6).
5. Loosen the screw (2).
6. Remove the upper stitch length adjusting wheel (1) from the shaft (4).
7. To set the stitch length, use a size 10 wrench to carefully turn the
shaft (4).
• to set a shorter stitch length: turn clockwise
• to set a longer stitch length: turn counterclockwise
(4) - Shaft
(5) - Scale
(6) - Key
36 Service Instructions 969 - 06.0 - 03/2019
Setting the stitch length adjusting wheel
③④
⑤
⑥
②
①
8. Perform a sewing test with a sheet of paper and readjust if necessary.
9. Turn the scale (5) so that the number indicating the stitch length is
exactly next to the adjusting mark (3).
10. Place the upper stitch length adjusting wheel (1) onto the shaft (4) and
tighten it with the wrench (6).
11. Tighten the screw (2).
7.2 Setting the lower stitch length adjusting wheel
Proper setting
Sew with 2 different stitch lengths.
The stitch lengths on the seam correspond with the set stitch lengths.
The lower stitch length adjusting wheel can only be turned up to the
stitch length set on the upper stitch length adjusting wheel.
Fig. 25: Setting the lower stitch length adjusting wheel
(1) - Screw
(2) - Lower stitch length adjusting wheel
(3) - Adjusting mark
To set the lower stitch length adjusting wheel:
1. Switch on the machine.
2. Unthread the needle thread.
3. Press the button on the machine arm.
The button turns off.
The machine switches over to the lower stitch length adjusting wheel.
4. Hold the lower stitch length adjusting wheel (2) in place using the
wrench (6).
5. Loosen the screw (1).
6. Remove the lower stitch length adjusting wheel (2) from the shaft (4).
(4) - Shaft
(5) - Scale
(6) - Key
Service Instructions 969 - 06.0 - 03/2019 37
Setting the stitch length adjusting wheel
④
①
②
③
7. To set the stitch length, use a size 10 wrench to carefully turn the
shaft (4).
• to set a shorter stitch length: turn counterclockwise
• to set a longer stitch length: turn clockwise
8. Perform a sewing test with a sheet of paper and readjust if necessary.
9. Turn the scale (5) so that the number indicating the stitch length is
exactly next to the adjusting mark (3).
10. Place the lower stitch length adjusting wheel (2) onto the shaft (4) and
tighten it with the wrench (6).
11. Tighten the screw (1).
7.3 Setting the stitch length limit
If not all of the stitch lengths are available during sewing operation, a limit
can be placed on the maximum stitch length that can be set.
12, 9, or 6 mm can be selected as the maximum stitch length. The appropriate throat plate must be selected for the selected maximum stitch
length. The throat plate cutout must be large enough to prevent the feed
dog from hitting the edges of the throat plate at the front and rear dead
center.
Proper setting
Turn the upper stitch length adjusting wheel clockwise as far as it will go.
The upper stitch length adjusting wheel can only be turned up to the
set maximum stitch length.
Fig. 26: Setting the stitch length limit
(1) - Upper stitch length adjusting wheel
(2) - Screw
To set the stitch length limit:
1. Position the upper stitch length adjusting wheel (1) to 0.
2. Hold the upper stitch length adjusting wheel (1) in place using the
wrench (3).
3. Loosen the screw (2).
(3) - Key
(4) - Mark-off slots
4. Remove the upper stitch length adjusting wheel (1).
38 Service Instructions 969 - 06.0 - 03/2019
Setting the stitch length adjusting wheel
③
①
②
5. Loosen the threaded pin from one of the 3 mark-off openings.
6. Screw the threaded pin into the mark-off opening for the required
maximum stitch length.
The slots are marked with numbers for the stitch length.
7. Turn the scale so that the 0 is exactly next to the adjusting mark.
8. Place the upper stitch length adjusting wheel (1) and hold it in position
using the wrench.
9. Tighten the screw (2).
7.4 Setting the eccentric for the forward and backward stitches
Proper setting
The forward and backward stitches are the same length.
To test the setting, unthread the needle thread and insert a sheet of paper.
Sew a seam forward, stop, slightly shift the sheet sideways, and sew a
seam backward. The punctures of the forward and backward stitches
have to lie exactly next to one another.
Cover
• Tilt the machine head ( p. 14)
Fig. 27: Setting the eccentric for the forward and backward stitches
(1) - Eccentric slot
(2) - Eccentric
To set the eccentric for forward and backward stitches:
1. Loosen the threaded pin (3).
2. Turn the eccentric screw (2) from the right through the slot in the base
plate:
Initial position:
The slot in the eccentric (1) is parallel to the axle of the machine, and
the recess faces down.
If the forward and backward stitches are not the same length:
• Turn clockwise: the forward stitch becomes larger, the backward
stitch smaller.
• Turn counterclockwise: the forward stitch becomes smaller, the
backward stitch larger.
3. Tighten the threaded pin (3).
(3) - Threaded pin
Service Instructions 969 - 06.0 - 03/2019 39
Setting the feed dog
8 Setting the feed dog
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before setting the feed dog.
The position and the movement of the feed dog and needle bar have to be
coordinated so that the needle pierces exactly in the center of the needle
hole on the feed dog.
Information
The adjustment notes given below refer to both Classic machines and
machines equipped with the option Heavy Transport.
Order
First, check the following setting:
• Needle bar linkage( p. 48)
8.1 Setting the feed dog position
Proper setting
When the stitch length is set to 0 and the needle is at the bottom dead
center, the center of the feed dog opening lines up with the axis of the
needle.
Cover
• Tilt the machine head ( p. 14)
40 Service Instructions 969 - 06.0 - 03/2019
Setting the feed dog
①
8.1.1 Moving the feed dog carrier in sewing direction
The feed dog carrier is connected to the stitch regulator gear via the sliding
shaft, and can be moved on this shaft.
Cover
• Tilt the machine head ( p. 14)
Fig. 28: Moving the feed dog carrier in sewing direction
(1) - Screw
To move the feed dog carrier in sewing direction:
1. Set the upper stitch length adjusting wheel to 0.
2. Loosen the screw (1).
3. Move the feed dog carrier in the sewing direction such that the feed
dog is exactly in the center of the throat plate cutout.
4. Tighten the screw (1).
Service Instructions 969 - 06.0 - 03/2019 41
8.1.2 Moving the feed dog sideways
①②
④
⑩⑪
⑤
⑥
③
⑨⑧⑦
Fig. 29: Moving the feed dog sideways
Setting the feed dog
(1) - Pin
(2) - Threaded pin
(3) - Stroke shaft
(4) - Screw
(5) - Adjusting ring
(6) - Threaded pin
To move the feed dog carrier sideways:
1. Loosen the screw (4).
2. Loosen the threaded pin (2).
3. Loosen the threaded pin (6).
4. Pull the pin (1) out slightly.
5. Move the feed dog carrier sideways so that the needle (10) pierces
into the center.
6. Tighten the screw (4).
Important
When doing this, make sure that the sliding shaft (7) is held firmly in place
by the clamp (8) and the adjusting ring (9).
7. Press the adjusting ring (5) against the casting and tighten the threaded
pin (2).
(7) - Sliding shaft
(8) - Clamp
(9) - Adjusting ring
(10) - Needle
(11) - Feed dog
Important
42 Service Instructions 969 - 06.0 - 03/2019
When doing this, make sure that the stroke shaft (3) is held firmly in place
by the adjusting ring (5) and the pin (1).
8. Push the pin (1) all the way in and tighten the threaded pin (6).
Setting the feed dog
③
①
②
8.2 Setting the feed dog movement
The feed dog moves in an elliptical cycle. To align this correctly, the feed
movement and the stroke height and the stroke movement of the feed dog
all have to be set.
Order
First, check the following setting:
• Feed dog position ( p. 40)
8.2.1 Setting the feed movement
The proper setting for the feed movement is checked at standstill and set
using the pusher eccentric.
Proper setting
Set the handwheel to the 190° position and the upper stitch length adjusting wheel to the maximum stitch length.
When the stitch regulator is pressed down, the feed dog stops.
Cover
• right arm cover ( p. 15)
Fig. 30: Setting the feed movement
(1) - Threaded pins
(2) - Pusher eccentric
To set the feed movement:
1. Set the upper stitch length adjusting wheel to the maximum stitch
length.
(3) - Stitch adjustment lever
2. Loosen the threaded pins (1).
3. Move the handwheel into the 190° position.
4. Press the stitch adjustment lever (3) down and observe how the feed
dog and needle respond.
5. Turn the pusher eccentric (2) so that the feed dog and needle no
longer move when the stitch adjustment lever (3) is pressed.
6. Tighten the threaded pins (1).
Service Instructions 969 - 06.0 - 03/2019 43
Setting the feed dog
③
①
②
④
⑤
8.2.2 Setting the feed dog height at top dead center
Proper setting
When the handwheel scale and the sewing foot stroke are set to,
respectively, 200° and 0, the feed dog protrudes 1.3 mm above the
throat plate.
Cover
• Tilt the machine head ( p. 14)
Fig. 31: Setting the feed dog height at top dead center
(1) - Feed dog
(2) - Screwdriver
(3) - Screw
To set the feed dog height at top dead center:
1. Position the feed dog (1) at top dead center.
2. Loosen the screw (3).
3. Push up the feed dog (1), as shown, using a thin screwdriver (2).
4. Move the feed dog (1) until it protrudes 1.3 mm from the throat plate.
5. Tighten the screw (3).
6. Check the feed dog height at top dead center.
44 Service Instructions 969 - 06.0 - 03/2019
To do so, use, for instance, a plate (4) and a feeler gage (5).
(4) - Feeler gage
(5) - Plate
Setting the feed dog
①
②
8.2.3 Setting the feed dog stroke movement
Order
First, check the following setting:
• Set the feed dog height at top dead center ( p. 44)
Proper setting
The upper edge of the feed dog must be at the same height when the feed
dog is at front dead center (handwheel position 90°) as when it is at the
rear dead center (handwheel position 270°).
At 90°, the feed dog is in the upward movement; at 270°, in the downward
movement.
Cover
• right arm cover ( p. 15)
Fig. 32: Setting the feed dog stroke movement
(1) - Threaded pins (2) - Stroke eccentric
To set the feed dog stroke movement:
1. Loosen the threaded pins (1).
2. Move the handwheel into the 90° position.
3. Turn the stroke eccentric (2) such that the upper edge of the feed dog
is at the same height as the upper edge of the throat plate during the
upward movement.
4. Tighten the threaded pins (1).
5. Check if the feed dog is at the same height at 90° and 270°; adjust if
necessary.
Service Instructions 969 - 06.0 - 03/2019 45
Setting the feed dog
⑤⑥
①
②
③
④
8.3 Setting the feeding eccentric with adjusting tube
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before setting the feeding
eccentric.
Proper setting
When the adjusting tube on one of the eccentrics (1), (5) or (6) is
pushed all the way to the edge of the arm slot, the handwheel scale will
show the following value:
• Stroke eccentric sewing feet (1): 23°
• Stroke eccentric feed dog (5): 5°
• Pusher eccentric feed dog (6): 230°
Cover
• left and right arm cover ( p. 15)
Fig. 33: Setting the feeding eccentric with adjusting tube
(1) - Stroke eccentric sewing feet
(2) - Edge of the arm slot
(3) - Adjusting tube
46 Service Instructions 969 - 06.0 - 03/2019
(4) - First hole in direction of rotation
(5) - Stroke eccentric feed dog
(6) - Pusher eccentric feed dog
Setting the feed dog
Setting the stroke eccentric of the sewing feet
To set the stroke eccentric of the sewing feet (1):
1. Loosen the threaded pins on the stroke eccentric (1).
2. Insert the adjusting tube (3) into the first hole in the direction of
rotation (4).
3. Press the adjusting tube (3) against the front edge of the machine arm.
4. Set the handwheel to 23°.
5. Tighten the threaded pins on the stroke eccentric (1).
Setting the pusher eccentric of the feed dog
To set the pusher eccentric of the feed dog (6):
1. Loosen the threaded pins on the pusher eccentric (6).
2. Insert the adjusting tube (3) into the first hole in the direction of
rotation (4).
3. Press the adjusting tube (3) against the front edge of the machine arm.
4. Set the handwheel to 230°.
5. Tighten the threaded pins on the pusher eccentric (6).
Setting the stroke eccentric of the feed dog
To set the stroke eccentric of the feed dog (5):
1. Loosen the threaded pins on the stroke eccentric (5).
2. Insert the adjusting tube (3) into the first hole in the direction of
rotation (4).
3. Press the adjusting tube (3) against the front edge of the machine arm.
4. Set the handwheel to 5°.
5. Tighten the threaded pins on the stroke eccentric (5).
Service Instructions 969 - 06.0 - 03/2019 47
Aligning the needle bar linkage
9 Aligning the needle bar linkage
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before aligning the needle
bar linkage.
The axial movement of pins and shafts running in plain bearings must be
properly restricted before setting begins ( p. 22).
9.1 Moving the needle bar linkage sideways
Proper setting
When the stitch length is set to 0 and the value set on the handwheel scale
is 90°, needle bar, the sewing foot bar and the presser foot bar are in a
line.
Cover
• left and right arm cover ( p. 15)
• Head cover ( p. 16)
48 Service Instructions 969 - 06.0 - 03/2019
Aligning the needle bar linkage
④
⑤
⑥
⑦
⑧
①
②
③
Fig. 34: Moving the needle bar linkage sideways
(1) - Screw
(2) - Screws
(3) - Screws
(4) - Needle bar
To move the needle bar linkage sideways:
1. Set the stitch length to 0.
2. Move the handwheel into the 90° position.
3. Loosen the screw (1).
4. Loosen the screws (2).
5. Loosen the screws (3).
6. Loosen the screw (8).
7. Move the needle bar linkage (7) sideways so that needle bar (4),
feeding foot bar (5) and presser foot bar (6) are all in a line.
8. Tighten screws (1), (2), (3), and (8).
(5) - Feeding foot bar
(6) - Presser foot bar
(7) - Needle bar linkage
(8) - Screw
Service Instructions 969 - 06.0 - 03/2019 49
Aligning the needle bar linkage
②
③
①
L
9.2 Aligning the needle bar linkage in the sewing direction
Proper setting
When the stitch length is set to 0 and the value set on the handwheel
scale is 90°, the needle bar is parallel to the presser foot bar.
Cover
• left and right arm cover ( p. 15)
Fig. 35: Aligning the needle bar linkage in the sewing direction
(1) - Screw top feed lever
(2) - Needle bar
To align the needle bar linkage in the sewing direction:
1. Loosen the screw for the top feed lever (1).
2. Turn the needle bar (2) until it is parallel to the presser foot bar (3).
3. Set the distance between the bars to L=44mm.
4. Tighten the screw (1).
5. Check the axial play ( p. 22).
(3) - Presser foot bar
50 Service Instructions 969 - 06.0 - 03/2019
Position of the hook and needle
①
②
③
10 Position of the hook and needle
10.1 Tensioning the hook drive toothed belt
A special measurement tool is required to achieve the proper setting.
Follow the information below when setting the belt tension:
• if the tension is too high, the service life of the toothed belt and ball
bearings is reduced
• if the tension is too low, the toothed belt may slip off the pulleys
CAUTION
Risk of injury from sharp and moving parts!
Puncture and crushing possible.
Switch off the machine before you check and set
the position of the hook and needle.
Proper setting
When you press down on the toothed belt approximately in the center
between the pulleys with a force of 10 N in the direction of the arrow,
the belt should deflect about 3mm.
Cover
• Belt cover ( p. 17)
• Tilt the machine head ( p. 14)
Fig. 36: Tensioning the hook drive toothed belt
(1) - Eccentric pin
(2) - Toothed belt
(3) - Screw
To tension the hook drive toothed belt:
1. Loosen the screw (3).
2. Turn the eccentric pin (1) with the tensioning pulley and tension the
toothed belt (2).
3. Tighten the screw (3).
Service Instructions 969 - 06.0 - 03/2019 51
Position of the hook and needle
8.5 mm
①
②
③
Important
Note that a low tightening torque when turning the eccentric pin (1) can
lead to a high tension of the toothed belt (2).
4. Check and, if necessary, adjust the toothed belt tension.
10.2 Setting the dead center of the reciprocating hook
movement
Proper setting
Fig. 37: Setting the dead center of the reciprocating hook movement (1)
Cover
• Belt cover ( p. 17)
• Tilt the machine head ( p. 14)
Fig. 38: Setting the dead center of the reciprocating hook movement (2)
(1) - Screw
(2) - Screws
(3) - Pull rod
52 Service Instructions 969 - 06.0 - 03/2019
Position of the hook and needle
④
⑤
To set the dead center of the reciprocating hook movement:
1. Use the handwheel to turn the pull rod (3) to the lower dead center.
2. Loosen screws (1) and (2).
Fig. 39: Setting the dead center of the reciprocating hook movement (3)
(4) - Marking (5) - Driver nose
3. Set the driver sideways.
The driver nose (5) points exactly to the marking (4).
4. Tighten screws (1) and (2).
5. Turn the pull rod to the lower dead center and check if the driver
nose (5) points exactly to the marking (4).
6. Readjust if necessary.
Service Instructions 969 - 06.0 - 03/2019 53
Position of the hook and needle
①
②
10.3 Setting the loop stroke position
Proper setting
When the stitch length is set to 0 and the machine is locked in place at
position 1, the hook tip is at the center in relation to the needle axis.
Cover
• right arm cover ( p. 15)
Fig. 40: Setting the loop stroke position (1)
(1) - Screws (2) - Screws
To set the loop stroke position:
1. Set the stitch length to 0.
2. Loosen the screws (1).
3. Lock the machine in place at position 1.
4. Loosen the screw (2).
54 Service Instructions 969 - 06.0 - 03/2019
Position of the hook and needle
③
④
Fig. 41: Setting the loop stroke position (2)
(3) - Groove (4) - Hook tip
5. Turn the tip of the hook (4) so that it is central to the axis of the needle.
The hook tip is situated in the lower third of the needle groove (3).
6. Tighten the screws (2).
7. Remove the lock.
8. Tighten the screws (1).
10.4 Setting the hook clearance
Proper setting
Lock the machine in place at position 1.
The maximum distance between hook tip and groove is 0.1 mm.
The hook tip must not touch the needle when moving past the needle.
Cover
• Disassemble the throat plate ( p. 19)
• Remove the feed dog ( p. 20)
• Tilt the machine head ( p. 14)
Service Instructions 969 - 06.0 - 03/2019 55
Fig. 42: Setting the hook clearance
①
②
③
④③② ⑥⑤
Position of the hook and needle
(1) - Hook cage
(2) - Needle
(3) - Hook tip
To set the hook clearance:
1. Lock the machine in place at position 1.
2. Check the distance between the groove of the needle (2) and the hook
tip (3).
3. Position the needle (2) at top dead center.
4. Loosen the screws (6) of the cover ring (5).
5. Remove the cover ring (5).
6. Remove the hook.
7. Loosen and remove the loop support.
8. Loosen the screw for the hook cage (1).
9. Remove the hook cage (1).
Important
When removing the hook cage, make sure not to damage the oil wick.
The hook cage (1) cannot be removed unless the driver and the slot in the
hook cage (1) are in alignment.
(4) - Driver
(5) - Cover ring
(6) - Screws
56 Service Instructions 969 - 06.0 - 03/2019
Position of the hook and needle
④
③
①
②
10. Insert spacer rings.
The spacer rings are contained in the accessory pack for the machine.
11. Assemble the hook again.
12. Lock the machine in place at 1 and check the distance between the
groove of the needle (2) and the hook tip (3).
Readjust the setting if necessary.
10.5 Setting the needle guard
Proper setting
The needle guard touches the needle lightly, preventing the needle from
colliding with the hook when pressure is exerted on the needle.
Fig. 43: Setting the needle guard
(1) - Needle
(2) - Driver
To set the needle guard:
1. Move the machine to loop stroke position.
2. Press the needle (1) toward the hook (3).
3. Check the distance between needle (1) and hook (3).
4. Loosen the screw (4).
5. Shift the driver (2).
• Increase the distance: Slide the driver (2) to the left
• Reduce the distance: Slide the driver (2) to the right
6. Tighten the screw (4).
7. Check if the distance between needle (1) and hook (3) is greater than
0.1 mm and, if so, correct the setting.
(3) - Hook
(4) - Screw
Service Instructions 969 - 06.0 - 03/2019 57
Position of the hook and needle
③
①
②
10.6 Setting the loop former
NOTICE
Property damage may occur!
Damage to the hook if the loop former is set incorrectly.
After fitting the hook, check that the needle has sufficient clearance
to pass between the hook drive dog and the loop former.
Insert the appropriate distance piece.
The loop former guides the thread loop in the needle toward the tip of
the hook, thus increasing the chance of the thread catching. The lateral
position of the loop former must be adjusted to suit the thickness of the
needle using the distance piece.
Information
The needle thickness has been engraved on the distance piece. There
is a matching distance piece for every needle thickness, which must be
inserted accordingly.
Cover
• Tilt the machine head ( p. 14)
Fig. 44: Setting the loop former
(1) - Screws
(2) - Loop former
To set the loop former:
1. Loosen the screws (1).
(3) - Distance piece
2. Take out the loop former (2) and distance piece (3).
58 Service Instructions 969 - 06.0 - 03/2019
Position of the hook and needle
③
④①
②
3. Select the appropriate distance piece for the needle thickness used.
Distance pieces are contained in the accessory pack for the machine.
4. Insert distance piece (3) and loop former (2).
5. Tighten the screws (1).
10.7 Setting the needle bar height
Order
First, check the following settings:
• Loop stroke position ( p. 54)
• A straight and undamaged needle has to be inserted (Operating
Instructions)
Proper setting
The machine is locked in place at position 1, and the upper stitch length
adjusting wheel is set to 0.
The hook tip is level with the lower third of the groove on the needle.
Disturbance
• Damage to the hook tip
• Jamming of the needle thread
• Missing stitches
• Thread breaking
• Needle breakage
Cover
• Remove the head cover ( p. 16)
Fig. 45: Setting the needle bar height
(1) - Screw
(2) - Needle bar
To set the needle bar height:
1. Lock the machine in place at position 1.
2. Set the upper stitch length adjusting wheel to 0.
3. Loosen the screw (1).
Service Instructions 969 - 06.0 - 03/2019 59
(3) - Hook tip
(4) - Groove
Position of the hook and needle
4. Move the height of the needle bar (2) such that the hook tip (3) is in
the middle of the lower third of the groove (4) for the needle.
Important
Do not twist the needle to the side.
The groove (4) must face toward the hook.
5. Tighten the screw (1).
6. Remove the lock.
7. Check the height of the needle bar at maximum stitch length when
sewing forward and in reverse; adjust it again if necessary.
60 Service Instructions 969 - 06.0 - 03/2019
Setting the sewing feet
11 Setting the sewing feet
11.1 Setting the sewing foot feed
11.1.1 Setting the zero stroke of the sewing feet and the tension force
CAUTION
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before you set the sewing
feet.
of the torsion spring
Proper setting
The connecting rods are in a line.
The ball pin is touching the stop screw.
The torsion spring is twisted 15° - 20°.
Cover
• left and right arm cover ( p. 15)
Service Instructions 969 - 06.0 - 03/2019 61
Setting the sewing feet
④
⑤⑥
⑦
⑧
⑨
①
②
③
Fig. 46: Setting the zero stroke of the sewing feet and the tension force of the torsion spring
(1) - Plates
(2) - Frame
(3) - Torsion spring
(4) - Pin
(5) - Slot
To set the zero stroke of the sewing feet and the tension force of the
torsion spring:
1. Loosen the screw in the slot (5).
2. Loosen the counternut (8).
3. Rotate the frame (2) so that the clips (1) are in a line.
4. Turn the stop screw (9) so that the ball pin (7) is in contact with it and
the clips (1) remain in a line.
5. Tighten the counternut (8).
6. Turn the torsion spring (3) with the pin (4) 15° - 20° in the direction of
the arrow.
7. Tighten the screw in the slot (5).
(6) - Screw
(7) - Ball pin
(8) - Counternut
(9) - Stop screw
62 Service Instructions 969 - 06.0 - 03/2019
Setting the sewing feet
⑧
⑨
⑩
⑪
⑫
⑬
⑭
⑮
①
②
③
④
⑤
⑥
⑦
11.1.2 Setting the drive dog of the presser foot bar
Proper setting
The stitch length is set to 0, and sewing foot and presser foot are at the
same height.
The drive dog is assembled to the presser foot bar in such a position
Cover
• left and right arm cover ( p. 15)
• Head cover ( p. 16)
Fig. 47: Setting the drive dog of the presser foot bar
that the needle shaft touches the presser foot bar.
(1) - Pin
(2) - Screw
(3) - Screws
(4) - Shaft
(5) - Gully
(6) - Assembly
(7) - Plate
(8) - Presser foot
(9) - Feeding foot
(10) - Presser foot bar
(11) - Slot
(12) - Sliding block
(13) - Lever
(14) - Drive dog screw
(15) - Drive dog
Service Instructions 969 - 06.0 - 03/2019 63
Setting the sewing feet
To set the drive dog of the presser foot bar:
1. Move the handwheel into the 0° position.
2. Set the stitch length to 0.
3. Loosen the screws (3).
4. Loosen the screw (1).
5.
Remove the assembly (6) from the shaft (4) and the pin (1).
6. Loosen the drive dog screw (14).
7. Place the plate (7) under the sewing feet.
8. Insert the needle shaft into the slot (11).
9. Turn the lever (13) so that the needle shaft touches the presser foot
bar (10) and that presser foot (8) and feeding foot (9) press onto the
plate (7).
10. Tighten the drive dog screw (14).
11. Assemble the assembly (6).
Ensure there is an axial play of 0.2 - 0.3 mm between the sliding
block (12) and the floor of the gully (5).
11.1.3 Setting the feed stroke of presser foot and sewing foot
This setting is used to ensure that, at the start of feeding, the presser foot
is lifted above the sewing material and the material feeding movement is
not obstructed by the sewing foot.
Proper setting
The stitch length is set to 0, and the stroke of presser foot and sewing foot
is set to 0.
The lever is attached to the lift bar of the feet in such a way that
the presser foot is positioned 0.3 mm higher than the sewing foot.
Cover
• left and right arm cover ( p. 15)
• head cover ( p. 16)
64 Service Instructions 969 - 06.0 - 03/2019
Setting the sewing feet
③④
⑤
①
②
Fig. 48: Setting the feed stroke of presser foot and sewing foot
(1) - Presser foot
(2) - Working position
(3) - Plate
To set the feed stroke of presser foot and feeding foot:
1. Move the handwheel into the 0° position.
2. Set the stitch length to 0.
3. Set the zero stroke of the feet ( p. 61).
4. Loosen the screw (5).
5. Place the plate (3) under the feet so that the feeding foot (4) is 0.3 mm
lower than the presser foot (1).
6. Manually move both feet down as far as they will go.
7. Tighten the screw (5).
(4) - Feeding foot
(5) - Screw
Service Instructions 969 - 06.0 - 03/2019 65
Setting the sewing feet
①
⑥
⑦
②③④ ⑤
11.1.4 Setting the stroke movement for the feeding foot
In order to ensure a correct feed, the stroke movement for the feeding
foot must be aligned to the stroke movement for the feed dog.
Proper setting
The left adjusting wheel for the sewing foot stroke is set to maximum
stroke.
The upper stitch length adjusting wheel is set to 0.
The feeding foot touches down exactly on the feed dog when the
downward movement of the needle tip reaches the upper edge of
the feeding foot.
This occurs at handwheel position 95°.
Cover
• left and right arm cover ( p. 15)
Fig. 49: Setting the stroke movement for the feeding foot
(1) - Feeding foot
(2) - Feed dog
(3) - Needle tip
(4) - Threaded pins
To set the stroke movement for the feeding foot:
1. Screw in the threaded pin (7) so that there is a stroke.
2. Set the upper stitch length adjusting wheel to 0.
3. Loosen the threaded pins (4).
4. Turn the stroke eccentric (5) so that the feeding foot (1) touches down
on the feed dog (2) when the handwheel is in the 95° position and the
tip of the needle (3) is at the height of the upper edge of the feeding
foot (1).
Important
(5) - Stroke eccentric
(6) - Plates
(7) - Threaded pin
Ensure not to move the stroke eccentric (5) laterally on the axle.
5. Tighten the threaded pins (4).
6. Loosen the threaded pin (7) far enough so that the clips (6) are in a
line again.
66 Service Instructions 969 - 06.0 - 03/2019
Setting the sewing feet
③④
⑤
①
②
11.2 Setting the foot stroke
11.2.1 Setting the foot stroke using the hand lever
The hand lever allows the feet to be raised to the heights of 14 mm and
20 mm.
Proper setting
The presser foot rests on the throat plate.
The hand lever is in the inactive position.
There is a guaranteed clearance of 0.3 - 0.5 mm between the stroke
Cover
• Head cover ( p. 16)
Fig. 50: Setting the foot stroke using the hand lever
lever and the drive dog.
(1) - Hand lever
(2) - Screw
(3) - Hexagonal wrench
To set the foot stroke using the hand lever:
1. Move the handwheel into the 0° position.
The presser foot rests on the throat plate.
2. Loosen the screw (2) and leave the hexagonal wrench (3) inserted.
3. Turn the stroke lever (4) so that there is a clearance of 0.3 - 0.5 mm
between the stroke lever (4) and the drive dog (5).
4. Tighten the screw (2).
(4) - Stroke lever
(5) - Drive dog
Service Instructions 969 - 06.0 - 03/2019 67
Setting the sewing feet
①
②
③
30 mm
11.2.2 Setting the foot stroke using the pneumatic cylinder
Proper setting
When set by pneumatic cylinder, the presser foot stroke is 30 mm.
Fig. 51: Setting the foot stroke using the pneumatic cylinder
(1) - Screw
(2) - Counternut
To set the foot stroke using the pneumatic cylinder:
1. Move the handwheel into the 0° position.
The presser foot rests on the throat plate.
2. Loosen the counternut (2).
3. Activate the pneumatic foot lift ( Operating Instructions).
The presser foot is lifted.
4. Turn the screw (1) until the presser foot (3) is positioned 30 mm above
the throat plate.
5. Tighten the counternut (2).
(3) - Presser foot
68 Service Instructions 969 - 06.0 - 03/2019
Setting the thread system
③
④
①
②
12 Setting the thread system
12.1 Setting the thread tension spring
The thread tension spring tensions the needle thread before the needle
penetrates the material, so that the needle thread cannot slip under the
needle and be pierced by it.
Important
If the thickness of the material is very thin or very thick, the setting of the
spring travel must be adjusted accordingly.
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before you set the thread
system.
• thin material: normal spring travel (initial position: horizontal)
• thick material: long spring travel (initial position: vertically downward)
Standard setting
The initial position of the thread tension spring is horizontal.
When at its initial position, the spring is turned by 90°.
Fig. 52: Setting the thread tension spring
(1) - Screw
(2) - Thread tension spring
(3) - Body
(4) - Sleeve
Service Instructions 969 - 06.0 - 03/2019 69
Setting the thread system
⑥
⑦
①
②
③
④
⑤
L
To set the thread tension spring:
1. Loosen the screw (1).
2. Turn the body (3).
3. Turn the sleeve (4) counterclockwise.
The further you turn the sleeve (4), the greater the spring force will
become.
4. Hold the sleeve (4) and body (3) in place, and tighten the screw (1).
12.2 Setting the winder
The winder is driven by its own electric motor. After it has wound the
bobbin, it switches off automatically.
Proper setting
The adjusting screw is tightened in such a way both winder levers are
approximately parallel to one another.
The winder is switched off mechanically when the winder pulley reaches
a distance of L=8mm from the internal diameter of the bobbin. The roller
is approx. 1mm below the outer diameter of the bobbin.
When the winder is switched off and locked in place at its initial position,
the winder wheel is at a distance of L=14mm from the internal diameter
of the bobbin.
Cover
• Thread tension plate ( p. 18)
Fig. 53: Setting the winder (1)
(1) - Winder lever
(2) - Adjusting screw
(3) - Counternut
(4) - Winder wheel
To set the winder:
1. Loosen the counternut (3).
2. Loosen or tighten the adjusting screw (2) so that the arms of the winder
levers (1) are approximately parallel.
(5) - Bobbin
(6) - Screw
(7) - Screw
70 Service Instructions 969 - 06.0 - 03/2019
Setting the thread system
⑩
⑪
⑧
⑨
0.5 mm
3. Set the winder pulley (4) to a distance of L=8mm from the internal
4. Loosen the screw (7).
Fig. 54: Setting the winder (2)
diameter of the bobbin (5).
(8) - Switch-off lever
(9) - Spring
5. Swing the switch-off lever (8) into the switch-off position.
The edge of the spring (9) rests against the edge of the switch-off
lever (8).
6. Tighten the screw (7).
7. Check that the winder switches off when the winder pulley (4) reaches
8mm from the internal diameter of the bobbin (5).
Correct the setting if necessary.
8. Turn the winder lever (1) to the 0 position.
The winder is switched off.
9. Loosen the screw (6).
10. Set the blocking lever (11) to the base of the slot in the blocking
cam (10).
11. Set the axial play of the blocking cam (10) to approx. 0.5 mm.
12. Keep the blocking cam (10) in the set position.
13. Set the winder pulley (5) to a distance of L=14mm from the internal
diameter of the bobbin.
14. Tighten the screw (7).
(10) - Blocking cam
(11) - Blocking lever
Proper setting
If the winder is switched off, the distance between the friction disk and
the rubber pulley is 0.5 mm.
The drive motor is not switched off by the microswitch until the friction disk
is out of contact with the rubber pulley.
The winder is switched off when the thread has been wound up to
0.5 - 1 mm below the outer diameter of the bobbin.
Cover
• Thread tension plate ( p. 18)
Service Instructions 969 - 06.0 - 03/2019 71
Fig. 55: Setting the winder (3)
⑤
⑥
⑦
⑧
①
②
③
④
0.5 mm
⑨
⑩
⑪
⑫
Setting the thread system
(1) - Winder lever
(2) - Screw
(3) - Counternut
(4) - Bobbin
1. Turn the winder lever to position 0.
The winder is switched off.
2. Loosen the screw (6).
3. Turn the eccentric (5) so that there is a gap of 0.5 mm between
the friction disk (8) and the rubber pulley (9).
4. Tighten the screw (6).
Fig. 56: Setting the winder (4)
(5) - Eccentric
(6) - Screw
(7) - Rubber pulley
(8) - Friction disk
(9) - Blocking lever
(10) - Blocking cam
5. Loosen the screws (12).
6. Set the position of the microswitch (11).
7. Tighten the screws (12).
(11) - Microswitch
(12) - Screws
72 Service Instructions 969 - 06.0 - 03/2019
Setting the thread system
8. Turn the blocking cam (10) in the direction of the arrow and switch
The microswitch (11) must not switch off.
9. Turn the winder shaft until the blocking lever (9) engages in the slot in
At this position, the microswitch (11) must switch the motor off.
10. Assemble the thread tension plate together with the winder.
11. Test the winder for correct operation.
12. Once the desired result has been obtained, tighten the counternut (3).
on the winder so that the blocking lever (9) rests on the outer diameter
of the blocking cam (10).
A clicking within the microswitch (11) indicates when the
microswitch (11) switches off.
the blocking cam (10).
If the microswitch (11) fails to switch off the motor, correct the position
of the microswitch (11).
Check if the winder (4) switches off when the thread has been wound
up to 0.5 - 1 mm below the outer diameter of the bobbin (4).
If the winder (4) fails to do so, tighten the screw (2) further or loosen it
and repeat the test.
Service Instructions 969 - 06.0 - 03/2019 73
Setting the thread system
④
⑤
①
②
③
12.3 Setting the hook thread guide
Proper setting
The distance between the tensioner element and the machine arm is set
so that the bobbin is wound equally on both ends.
If, due to the position of the tensioner element, the bobbin cannot be
wound equally, the inclination of the hook thread guide must be changed.
Cover
• right arm cover ( p. 15)
Fig. 57: Setting the hook thread guide
(1) - Threaded pins
(2) - Bobbin
(3) - Hook thread guide
To set the hook thread guide:
1. Insert and wind on the hook thread.
If the hook thread is concentrated at one end of the bobbin:
2. Loosen the screw (5).
3. Align the tensioner element (4) so that it is central to the hook thread
guide (3).
4. Tighten the screw (5).
5. If the hook thread is still concentrated at one end of the bobbin, adjust
the inclination of the hook thread guide (3) using the threaded pins (1).
(4) - Tensioner element
(5) - Screw
74 Service Instructions 969 - 06.0 - 03/2019
Setting the thread cutter
④⑤ ⑥ ⑦
①
②
③
80 mm
1mm
13 Setting the thread cutter
13.1 Setting the thread cutter timing
Proper setting
The left edge of the lever must be at a distance of 80 mm from the right
edge of the arm.
The control cam is located at a distance of 1mm from the lever.
When the pulley is engaged in the setting groove of the control cam, the
handwheel scale indicates 120°.
CAUTION
Risk of injury from sharp and moving parts!
Puncture or crushing possible.
Switch off the machine before setting the thread
cutter.
Cover
• right arm cover ( p. 15)
Fig. 58: Setting the thread cutter timing
(1) - Screw
(2) - Lever
(3) - Control cam
(4) - Screws
(5) - Edge of the arm
(6) - Roll
(7) - Setting groove
To set the thread cutter timing:
1. Loosen the screw (1).
2. Adjust the lever (2) to a distance of 80 mm from the right edge of
the arm.
3. Tighten the screw (1).
Service Instructions 969 - 06.0 - 03/2019 75
Setting the thread cutter
4. Loosen the screws (4).
5. Set the handwheel position to 120°.
6. Adjust the control cam (3) to a distance of 1mm from the lever (2).
7. Press the lever (2) down manually.
8. Turn the control cam (3) manually until the roller (6) latches into place
exactly in the setting groove (7).
9. Tighten the screws (4).
13.2 Setting the initial position of the thread cutter and
the position of the thread-pulling knife
Proper setting
When the lever is moved up against the pin
• the gap between roller and cutoff curve is 0.1 - 0.15 mm when the
handwheel is at the 80° position
• the thread cutter shaft has no axial play
• the marking of the thread-pulling knife and the blade of the fixed knife
line up on top of each other
Cover
• right arm cover ( p. 15)
• throat plate ( p. 19)
• feed dog( p. 20)
• tilt the machine head ( p. 14)
76 Service Instructions 969 - 06.0 - 03/2019
Setting the thread cutter
①
②
③
④
Fig. 59: Setting the initial position of the thread cutter and the position of the thread-pulling
knife (1)
(1) - Assembly opening
(2) - Lever
To set the initial position of the thread cutter and the position of the threadpulling knife:
1. Move the handwheel into the 80° position.
2. Loosen the screw on the lever (2) through the assembly opening (1).
3. Loosen the screw (3) on the lever (4).
(3) - Screw
(4) - Lever
Service Instructions 969 - 06.0 - 03/2019 77
Setting the thread cutter
⑥
⑤
⑦
Fig. 60: Setting the initial position of the thread cutter and the position of the thread-pulling
knife (2)
(5) - Thread-pulling knife
(6) - Marking
4. Set the thread-pulling knife (5) such that the marking (6) lines up with
the blade of the fixed knife (7).
5. Extend the thread-pulling knife (5).
(7) - Fixed knife
78 Service Instructions 969 - 06.0 - 03/2019
Setting the thread cutter
0.8 - 0.9 mm
⑩
⑪
⑫
⑧
⑨
Initial position: 43.7 mm
Fig. 61: Setting the initial position of the thread cutter and the position of the thread-pulling
knife (3)
(8) - Gap
(9) - Knife carrier
(10) - Feed dog mounting plate
6. Insert a feeler gage (0.9 mm) into the gap (8).
7. Push the knife carrier (9) to the right against feeler gage and feed dog
mounting plate (10).
8. Push the lever (2) to the left.
9. Place a feeler gage (0.1 mm) between roll (12) and cutoff curve (11)
at handwheel position 80°.
10. Push the roll (12) down.
11. Tighten the screw on the lever (2) through the assembly opening (1).
12. Push the lever (4) to the right.
13. Tighten the screw (3).
(11) - Cutoff curve
(12) - Roll
Service Instructions 969 - 06.0 - 03/2019 79
Setting the thread cutter
⑭
⑬
⑤
Fig. 62: Setting the initial position of the thread cutter and the position of the thread-pulling
knife (4)
(5) - Thread-pulling knife
(13) - Slot
14. Carry out a cutting test manually: The thread-pulling knife (5) must
catch the needle thread (14), preventing it from being cut.
Important
The needle thread (14) must be positioned in the slot (13) of the threadpulling knife (5).
15. If necessary, adjust the position of the thread-pulling knife (5) to the
left or the right until the needle thread (14) is positioned in the slot (13)
of the thread-pulling knife (5).
16. Perform a sewing test with a sheet of paper at normal speed and readjust if necessary.
(14) - Needle thread
80 Service Instructions 969 - 06.0 - 03/2019
Setting the thread cutter
⑤
⑥
①
②
③
④
13.3 Setting the pneumatic cylinder lever
Proper setting
When the thread cutter is in its initial position, the distance between the
piston and the base of the pneumatic cylinder is 0.5 - 1 mm.
Cover
• Tilt the machine head ( p. 14)
Fig. 63: Setting the pneumatic cylinder lever
(1) - Assembly opening
(2) - Lever
(3) - Piston
To set the pneumatic cylinder lever:
1. Turn the lever (6) such that it rests against the pin (5).
2. Loosen the screw for the lever (2) through the assembly opening (1).
3. Turn the lever (2) until the piston (3) makes contact with the base of
the pneumatic cylinder (4).
4. Turn the lever (2) slightly back until there is gap between the piston (3)
and the base of the pneumatic cylinder (4) that is approx. 0.5-1mm
wide.
5. Tighten the screw for the lever (2) through the assembly opening (1).
(4) - Pneumatic cylinder
(5) - Pin
(6) - Lever
Service Instructions 969 - 06.0 - 03/2019 81
Setting the thread cutter
①
13.4 Setting the cutting pressure
Proper setting
While it should be as low as possible, the cutting pressure must allow for
the thread to be cut in a reliable manner.
Disturbance
• Very rapid wear of the knife if the pressure is set too high
Fig. 64: Setting the cutting pressure
(1) - Screw
To set the cutting pressure:
1. Turn the screw (1).
• Increase the cutting pressure: Turn screw (1) clockwise
• Reduce the cutting pressure: Turn screw (1) counterclockwise
2. Sew and cut off the thread.
3. Readjust the cutting pressure if necessary.
82 Service Instructions 969 - 06.0 - 03/2019
Setting the thread cutter
40 - 50 mm
①
②
13.5 Setting the hook thread clamp
Proper setting
If the pressure of the hook thread clamp is correct, the end of the hook
thread at the beginning of the seam is 40 - 50 mm long.
Fig. 65: Setting the hook thread clamp
(1) - End of the hook thread (2) - Screw
To set the hook thread clamp:
1. Complete a few short seams including thread cutting at the seam end.
2. Measure the length of the hook thread end (1) at the start of the seams.
Hook thread end (1) shorter than 40 mm:
1. Turn the screw (2) clockwise to increase the clamping force.
Hook thread end (1) longer than 50 mm:
1. Turn the screw (2) counterclockwise to reduce the clamping force.
Service Instructions 969 - 06.0 - 03/2019 83
Soft start
①
14 Soft start
The soft start system allows the machine to start at low speed and build
up to maximum speed over a defined number of stitches.
Fig. 66: Soft start
(1) - Control panel OP1000
To activate soft start:
1. Activate the soft start setting on the OP1000 control panel (1)
( Instructions for use DAC basic/classic).
84 Service Instructions 969 - 06.0 - 03/2019
Programming
③④ ⑤
②
⑥
⑦
①
②
15 Programming
All software settings are performed using the OP1000 control panel.
The control panel is composed of a display and buttons.
Using the control panel you can:
• Use groups of buttons to select machine functions
• Read service and error messages
Information
This chapter describes the machine-specific functions of the OP1000
control panel.
Refer to the Instructions for use DAC basic/classic for further
information on the control and the OP1000 control panel.
Fig. 67: Programming
(1) - Power LED
(2) - Thread button group
(3) - Function button
(4) - Programming button group
Button Function
Thread button group
Start bartack • Sets the start bartack
(5) - Seam program button group
(6) - LED for 2
(7) - Display
nd
stitch length
Multiple start bartack • Sets the multiple start bartack
Service Instructions 969 - 06.0 - 03/2019 85
Programming
Button Function
End bartack • Sets the end bartack
Multiple end bartack • Sets the multiple end bartack
Thread trimmer • Activates or deactivates
the thread cutter
Thread clamp • Activates or deactivates
the thread clamp
Needle position after
sewing stop
Sewing foot lift after thread
cutter
Sewing foot lift after sewing
stop
Soft start • Activates or deactivates the soft
Speed • Reduces the motor speed
Function button • Activates or deactivates any
• Sets the needle position after
sewing stops
Needle up/down
• Activates or deactivates the
sewing foot lift after the thread
cutter
• Activates or deactivates the
sewing foot lift after sewing
stops
start
stored function
Programming button group
ESC • Ends parameter mode
A+ • Increases parameter
• Changes user level
• Selects subprogram
86 Service Instructions 969 - 06.0 - 03/2019
Programming
Button Function
B+ • Increases parameter
• Changes to next higher category
• Selects subprogram
C+ • Increases parameter
• Selects subprogram
D+ • Increases parameter
• Selects subprogram
OK • Calls parameters or saves them
• Confirms parameters
P • Starts or ends the parameter
mode
A- • Decreases parameter
• Changes user level
• Selects subprogram
B- • Decreases parameter
• Changes to next lower category
• Selects subprogram
C- • Decreases parameter
• Selects subprogram
Service Instructions 969 - 06.0 - 03/2019 87
Button Function
D- • Decreases parameter
Reset • Resets the (piece) counter
Seam program button group
Seam program I • Activates seam program I
Programming
• Selects subprogram
Seam program II • Activates seam program II
Seam program III • Sets seam program III
88 Service Instructions 969 - 06.0 - 03/2019
Programming
Creating a seam program
For some work processes - such as sewing on labels - you will find it useful
to create seam programs that let you save a sewing process for repeated
use.
It is possible to create seam programs consisting of 4 or 6 seam sections
and up to 25 freely programmable seam sections.
The following parameters can be set for each individual seam section:
• Soft start
• Thread clamp
• Locking mechanism
• Sewing backwards
• Thread trimmer
• Automatic sewing foot lift
• Needle position
• Speed reduction
• Number of stitches
• Stitch length (upper and lower adjusting wheel)
Service Instructions 969 - 06.0 - 03/2019 89
Programming
90 Service Instructions 969 - 06.0 - 03/2019
Maintenance
16 Maintenance
WARNING
Risk of injury from sharp parts!
Punctures and cutting possible.
Prior to any maintenance work, switch off the
machine or set the machine to threading mode.
WARNING
Risk of injury from moving parts!
Crushing possible.
Prior to any maintenance work, switch off the
machine or set the machine to threading mode.
This chapter describes maintenance work that needs to be carried out on
a regular basis to extend the service life of the machine and achieve the
desired seam quality.
Maintenance intervals
Work to be carried out Operating hours
8 40 160 500
Removing lint and thread remnants
Checking the oil level
Servicing the pneumatic system
Lubricating the needle bar
Service Instructions 969 - 06.0 - 03/2019 91
16.1 Cleaning
WARNING
Risk of injury from flying particles!
Flying particles can enter the eyes, causing injury.
Wear safety goggles.
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
Property damage from soiling!
Lint and thread remnants can impair the operation of the machine.
Clean the machine as described.
Maintenance
NOTICE
Property damage from solvent-based cleaners!
Solvent-based cleaners will damage paintwork.
Use only solvent-free substances for cleaning.
92 Service Instructions 969 - 06.0 - 03/2019
Maintenance
③
④
①
②
Fig. 68: Cleaning
(1) - Area around the needle
(2) - Feed dog
Points that need to be cleaned particularly thoroughly:
• Area around the needle (1)
• Feed dog (2)
• Thread-pulling knife (3)
• Hook and thread cutter (4)
To clean the machine:
1. Switch off the machine.
2. Disassemble the throat plate ( p. 19).
3. Remove any lint and thread remnants using a brush or compressed
air gun.
(3) - Thread-pulling knife
(4) - Hook and thread cutter
Service Instructions 969 - 06.0 - 03/2019 93
16.2 Lubricating
CAUTION
Risk of injury from contact with oil!
Oil can cause a rash if it comes into contact with
skin.
Avoid skin contact with oil.
If oil has come into contact with your skin, wash the
affected areas thoroughly.
NOTICE
Property damage from incorrect oil!
Incorrect oil types can result in damage to the machine.
Only use oil that complies with the data in the instructions.
Maintenance
CAUTION
Risk of environmental damage from oil!
Oil is a pollutant and must not enter the sewage
system or the soil.
Carefully collect up used oil.
Dispose of used oil and oily machine parts in
accordance with national regulations.
The machine is equipped with a central oil-wick lubrication system.
The bearings are supplied from the oil reservoir.
For topping off the oil reservoir, use only lubricating oil DA 10 or oil of
equivalent quality with the following specifications:
• Viscosity at 40 °C: 10 mm²/s
• Flash point: 150 °C
You can order the lubricating oil from our sales offices using the following
part numbers:
Container Part no.
250 ml 9047 000011
1 l 9047 000012
2 l 9047 000013
5 l 9047 000014
94 Service Instructions 969 - 06.0 - 03/2019
Maintenance
①
②
③
Checking the oil level
Fig. 69: Checking the oil level
MAX
MIN
(1) - Oil filler opening
(2) - Maximum level marking
Proper setting
The oil level must not rise above the maximum level marking (2) or drop
below the minimum level marking (3).
Information
In the Classic equipment version of the machine, the oil level indicator will
light up red if the oil level has dropped below the minimum level marking.
To top off the oil:
1. Switch off the machine.
2. Fill oil through the oil filler opening (1) no higher than the maximum
level marking (2).
3. Switch on the machine again.
(3) - Minimum level marking
Service Instructions 969 - 06.0 - 03/2019 95
Maintenance
①
②
16.3 Servicing the pneumatic system
16.3.1 Setting the operating pressure
NOTICE
Property damage from incorrect setting!
Incorrect operating pressure can result in damage to the machine.
Ensure that the machine is only used when the operating pressure
is set correctly.
Proper setting
Refer to the Technical data ( p. 115) chapter for the permissible
operating pressure. The operating pressure cannot deviate by more than
± 0.5 bar.
Check the operating pressure on a daily basis.
Fig. 70: Setting the operating pressure
(1) - Pressure controller (2) - Pressure gage
To set the operating pressure:
1. Pull the pressure controller (1) up.
2. Turn the pressure controller until the pressure gage (2) indicates
the proper setting:
• Increase pressure = turn clockwise
• Reduce pressure = turn counterclockwise
3. Push the pressure controller (1) down.
96 Service Instructions 969 - 06.0 - 03/2019
Maintenance
①
②③
16.3.2 Draining the water condensation
NOTICE
Property damage from excess water!
Excess water can cause damage to the machine.
Drain water as required.
Water condensation accumulates in the water separator (2) of the
pressure controller.
Proper setting
Water condensation must not rise up to the level of the filter element (1).
Check the water level in the water separator (2) on a daily basis.
Fig. 71: Draining the water condensation
(1) - Filter element
(2) - Water separator
To drain water condensation:
1. Disconnect the machine from the compressed air supply.
2. Place the collection tray under the drain screw (3).
3. Loosen the drain screw (3) completely.
4. Allow water to drain into the collection tray.
5. Tighten the drain screw (3).
6. Connect the machine to the compressed air supply.
(3) - Drain screw
Service Instructions 969 - 06.0 - 03/2019 97
16.3.3 Cleaning the filter element
①
②③
NOTICE
Damage to the paintwork from solvent-based cleaners!
Solvent-based cleaners damage the filter.
Use only solvent-free substances for washing out the filter tray.
Fig. 72: Cleaning the filter element
Maintenance
(1) - Filter element
(2) - Water separator
To clean the filter element:
1. Disconnect the machine from the compressed air supply.
2. Drain the water condensation ( p. 97).
3. Loosen the water separator (2).
4. Loosen the filter element (1).
5. Blow out the filter element (1) using the compressed air gun.
6. Wash out the filter tray using benzine.
7. Tighten the filter element (1).
8. Tighten the water separator (2).
9. Tighten the drain screw (3).
10. Connect the machine to the compressed air supply.
(3) - Drain screw
98 Service Instructions 969 - 06.0 - 03/2019
Loading...