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967
Service Instructions
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All rights reserved.
Property of Dürkopp Adler AG and protected by copyright. All forms of reproduction, even as
extracts, are prohibited unless prior written permission has been given by Dürkopp Adler AG.
Copyright © Dürkopp Adler AG - 2014
Page 3
Table of contents
1 About these service instructions..............................................3
1.1 Scope of these 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 the covers..................................................................10
3.3.1 Access to the machine bottom section.......................................10
3.3.2 Removing and fitting the arm cover............................................11
3.3.3 Removing and fitting the head cover..........................................12
3.3.4 Removing and fitting the cover plate ..........................................12
3.3.5 Removing and installing the handwheel and drive belt cover.....13
3.3.6 Removing and installing the thread tension plate.......................13
3.3.7 Removing and installing the hook compartment cover...............14
3.3.8 Removing and installing the throat plate.....................................15
3.3.9 Removing and installing the feed dog.........................................16
3.4 Flats on shafts ............................................................................17
3.5 Axial play for shafts running in plain bearings ............................18
3.6 Locking the sewing machine in place.........................................19
3.7 Putting the handwheel into position............................................20
4 Positioning the arm shaft.........................................................21
5 Setting the handwheel scale....................................................23
6 Setting the drive........................................................................25
6.1 Setting the drive ratio..................................................................25
6.1.1 Removing the drive belt..............................................................25
6.1.2 Adjusting the drive pulley............................................................26
6.1.3 Adjusting the belt tension............................................................27
6.2 Adjusting the positioning of the machine....................................28
6.2.1 Determining the drive ratio in the control program......................28
6.2.2 Adjusting the reference position of the handwheel.....................29
7 Setting the stitch length adjusting wheels.............................31
7.1 Setting the upper stitch length adjusting wheel ..........................31
7.2 Setting the lower stitch length adjusting wheel...........................33
7.3 Setting the stitch length limit.......................................................35
7.4 Setting the eccentric for the forward and backward stitches ......37
8 Setting the feed dog................................................................. 39
8.1 Setting the feed dog position......................................................39
8.1.1 Moving the feed dog...................................................................40
8.1.2 Moving the feed dog carrier........................................................40
8.2 Adjusting the feed dog movement..............................................42
8.2.1 Adjusting the forwards movement ..............................................42
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Table of contents
8.2.2 Setting the feed dog height at top dead center...........................43
8.2.3 Adjusting the stroke movement ..................................................44
9 Aligning the needle bar linkage...............................................47
9.1 Moving the needle bar linkage laterally ......................................47
9.2 Aligning the needle bar linkage in the sewing direction..............49
10 Position of the hook and needle .............................................51
10.1 Tensioning the hook drive belt....................................................51
10.2 Adjusting the dead point of the reciprocating movement of the drive
52
10.3 Setting the loop stroke position...................................................53
10.4 Setting the hook clearance.........................................................54
10.5 Adjusting the loop former............................................................55
10.6 Setting the needle bar height......................................................56
11 Adjusting the sewing foot feed ...............................................59
11.1 Adjusting the zero stroke of the feet, tension force of the torsion
spring 59
11.2 Adjusting the drive dog for the presser foot bar..........................61
11.3 Aligning the feed stroke of the feet.............................................62
11.4 Setting the stroke movement for the feeding foot.......................63
12 Adjusting the foot stroke......................................................... 65
12.1 Adjusting the foot stroke generated by the hand lever ...............65
12.2 Adjusting the foot stroke generated by the pneumatic cylinder..66
13 Adjusting the thread system ...................................................67
13.1 Setting the thread tensioning spring...........................................67
13.2 Setting the winder.......................................................................68
13.3 Adjusting the hook-thread guide.................................................72
14 Adjusting the thread cut-off.....................................................75
14.1 Adjusting the thread cut-off point................................................75
14.2 Basic setting of the thread cutter................................................76
14.3 Adjust the position of the movable knife.....................................78
14.4 Adjusting the lateral position of the movable knife......................79
14.5 Adjusting the cutting pressure of the knife..................................80
14.6 Adjusting the hook thread clamp ................................................81
15 Soft start.................................................................................... 83
16 Maintenance.............................................................................. 85
16.1 Cleaning the filter element..........................................................85
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About these service instructions
1 About these service instructions
This manual for sewing machine 967 was compiled with the utmost care.
It contains information and notes to enable the machine to give many
years of reliable service.
1.1 Scope of these service instructions
These instructions describe the setting and maintenance work on the 967
sewing machine. It applies to all sub-classes.
The intended use and set-up is described in the Operating instructions.
1.2 Representation conventions – symbols and characters
Various information in this manual is represented or highlighted by the following characters in order to facilitate easy and quick understanding:
Correct 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 setting up)
Steps to be performed for servicing, maintenance, and installation
Steps to be performed via the software control panel
The individual steps are numbered:
1. First step
1.
2. Second step
2.
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.
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About these service instructions
Information
Additional information, e.g. on alternative operating facilities.
Sequence
Specifies the work to be performed before or after a setting.
References
Reference to another section in the manual.
Safety Important warnings for the machine operator are specially designated.
Since safety is of particular importance, hazard symbols, levels of danger
and their signal words are described separately in 2 Safety.
Orientation If the figure is unclear, indications of right or left are always from the oper-
ator's point of view.
1.3 Other documents
This equipment 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 these components is
described in each manufacturer's manual.
1.4 Liability
All information in this 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 transport damages
• Failure to observe operating manual
• Improper use
• Unauthorized modifications to the machine
• Use of untrained personnel
• Use of unapproved replacement parts
4
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Safety
2 Safety
This section contains basic information for your safety.
Read the information carefully before setting up, programming, maintaining, 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
Only authorized personnel should use the machine. Anyone working on
the machine should read the operating manual first.
The machine should only be set up in accordance with the manual.
The operating manual should be available at the machine's location at all
times.
Observe the generally applicable safety and accident prevention regula-
tions and the legal regulations concerning industrial safety and environmental protection.
If you use parts from suppliers, observe the safety information and operating manual provided by the manufacturer.
All warnings on the machine must always be in legible condition and may
not be removed. Missing or damaged labels should be replaced immediately.
In the following situations, the machine must be disconnected from the
power supply using the main switch or by disconnecting the power plug:
• Threading
• Replacing the needle or other sewing tools
• Leaving the workplace
• Performing service, maintenance work and repairs
Inspect the machine while in use for any externally visible damage. Stop
working as soon as you notice any changes to the machine. Report any
changes to your supervisor. A damaged machine may no longer be used.
Machines or machine parts that have reached the end of their service life
must not continue to be used. They have to be disposed of correctly and
in accordance with the applicable statutory provisions.
Only qualified specialists may set up the machine. Anyone setting up the
machine should read the operating manual first.
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Safety
Only qualified specialists may perform maintenance work and repairs.
Anyone maintaining or setting up the machine must read the service instructions first.
Safety equipment should not be removed or deactivated. If this cannot be
avoided for a repair operation or service setting, the safety equipment
must be refitted and put back into service immediately afterwards.
Only qualified electrical specialists may perform work on electrical equipment.
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.
Work on live components and equipment is prohibited. Exceptions are defined in the specifications in DIN VDE 0105.
Only use original spare parts from the manufacturer. Missing or faulty
spare parts could impair safety and damage the machine.
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 degree of risk:
Signal words Signal words and the hazard that they describe:
Signal word Hazard
DANGER Will result in serious injury or death.
WARNING Can result in serious injury or death.
CAUTION Can result in minor or moderate injury.
ATTENTION Can result in damage to property.
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Safety
Symbols The following symbols indicate the type of risk to personnel:
Symbol Type of danger
General risk
Risk of electric shock
Risk of puncturing
Risk of crushing
Examples Examples of the layout of the warnings in the text:
DANGER
Type and source of risk
Consequences of non-observance
Measures for avoiding the risk
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 risk
Consequences of non-observance
Measures for avoiding the risk
This is what a warning looks like for a hazard that
could result in serious injury or even death if
ignored.
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Safety
CAUTION
Type and source of risk
Consequences of non-observance
Measures for avoiding the risk
This is what a warning looks like for a hazard that
could result in moderate or minor injury if the warning is ignored.
CAUTION
Type and source of risk
Measures for avoiding the risk
This is a warning note for a hazard that could result
in environmental damage if ignored.
ATTENTION
Type and source of risk
Consequences of non-observance
Measures for avoiding the risk
This is what a hazard note looks like for a hazard that can result in property damage if the note is not observed.
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Working basis
3 Working basis
3.1 Sequence of the settings
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 .
ATTENTION
Machine damage possible due to incorrect sequence.
Always adhere to the working sequence specified in this manual.
3.2 Cable routing
Ensure that all cables in the machine are laid such that moving parts are
not impaired in their ability to function correctly.
1. Lay any excess cabling neatly in proper cable loops.
2. Tie the loops together using a cable tie.
If possible, bind the loops to fixed parts.
The cables must be fixed firmly in place.
3. Cut off any protruding part of the cable tie.
ATTENTION
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.
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Working basis
3.3 Removing the covers
WARNING
Risk of injury
Crushing by moving parts
Switch the sewing machine off before you remove the covers
or refit them.
In many types of setting work, you will have to remove the machine covers
first 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 tilt the machine upper section.
Figure 1: Tilting and erecting the machine upper section
10
Tilting the upper machine section
1. Tilt the machine upper section as far as it will go.
Erecting the machine upper section
1. Erecting the machine upper section
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Working basis
3.3.2 Removing and fitting the arm cover
Each of the two upper covers can be removed separately as required.
Figure 2: Removing and fitting the arm cover
ྲྀ
ཱ
ཱུ
ི
ུ
ཱི
(1) - Right hand adjusting wheel
(2) - Left hand adjusting wheel
(3) - Screws
(4) - Upper left cover
Removing the left arm cover
1. Turn the left hand adjusting wheel from position (2) to position (0).
2. Turn the right hand adjusting wheel from position (1) to position (8).
The covers can be removed only when the adjusting wheels are in the
correct position.
3. Loosen the screws (3).
(5) - Upper right cover
(6) - Screws
(7) - Lever
4. Raise the upper left cover (4) in the direction arrowed.
Removing the right arm cover
1. Turn the lever (7) clockwise as far as the stop.
2. Loosen the screws (6).
3. Lift up the cover and release the power supply plug that is attached to
the underside of the cover and which supplies the fan.
4. Raise the upper right cover (5) in the direction arrowed.
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3.3.3 Removing and fitting the head cover
Figure 3: Removing the head cover
(1) - Head cover (2) - Screws
Working basis
ཱ
Removing the head cover
1. Loosen the screws (2).
2. Remove the head cover (1).
3.3.4 Removing and fitting the cover plate
Figure 4: Removing the cover plate
ཱ
12
(1) - Cover plate (2) - Screws
Removing the cover plate
1. Loosen the screws (2).
2. Remove the cover plate (1).
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Working basis
3.3.5 Removing and installing the handwheel and drive belt cover
Figure 5: Removing the drive belt cover
ཱ
(1) - Handwheel securing screws
(2) - Handwheel
(3) - Drive belt cover
Removing the drive belt cover
1. Loosen the screws on the handwheel (1).
2. Remove the handwheel (2).
3. Loosen the screws on the drive belt cover (4).
(4) - Drive belt cover securing screws
ཱི
ི
4. Remove the drive belt cover (3).
3.3.6 Removing and installing the thread tension plate
Figure 6: Removing the thread tension plate
ཱ
ི
(1) -Upper right cover
(2) - Thread tension plate securing screws
(3) - Thread tension plate
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Working basis
Removing the thread tension plate
1. First remove the upper right cover (1).
The thread tension plate is connected to cables and hoses which are
attached under the upper right cover. This cover therefore must be
removed.
2. Loosen the screws (2).
3. Remove the thread tension plate (3).
3.3.7 Removing and installing the hook compartment cover
Figure 7: Removing the hook compartment cover
ཱ
ུ
ི
ཱི
(1) - Cover
(2) - Opening
(3) - Cover
Removing the hook compartment cover
1. Insert a finger into the opening (2).
2. Push the cover (1) up.
3. Applying moderate force, pull the cover (3) off upwards the
(the cover is secured with a permanent magnet).
4. Loosen the screws (4).
5. Remove the plate (5).
(4) - Screws
(5) - Plate
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Working basis
3.3.8 Removing and installing the throat plate
WARNING
Risk of injury
Risk of crushing injuries and stab wounds from moving and
sharp parts.
Switch the sewing machine off before you remove or install the
throat plate.
Figure 8: Removing and installing the throat plate
ཱ
(1) - Throat plate (2) - Screws
Removing the throat plate
1. Remove the hook compartment cover ( page 14).
2. Use the hand lever to raise the foot.
3. Loosen the screws (2).
4. Remove the throat plate (1).
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3.3.9 Removing and installing the feed dog
WARNING
Risk of injury
Risk of crushing injuries and stab wounds from moving and
sharp parts.
Switch the sewing machine off before you remove or refit the
feed dog.
Figure 9: Removing and installing the feed dog
Working basis
ི
ཱ
(1) - Feed dog carrier
(2) - Screws
Removing the feed dog
1. Remove the throat plate ( page 15).
2. Loosen the screws (2).
3. Take the feed dog (3) off the feed dog carrier (1).
Installing the feed dog
1. Place the feed dog (3) on the feed dog carrier (1) and lightly tighten the
screws (2).
2. Installing the throat plate ( page 15)
3. Install the feed dog (3) so that the clearance from the throat plate is the
same on both sides.
(3) - Feed dog
16
4. Tighten the screws (2).
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Working basis
3.4 Flats on shafts
Figure 10: Flats on shafts
ཱ
(1) - Shaft (2) - Surface
Some shafts have flat surfaces at those points where the components are
screwed on. This stabilizes the connection and makes adjustment easier.
Always ensure that the screw faces are completely flush with the surface.
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3.5 Axial play for shafts running in plain bearings
Figure 11: Axial play for shafts running in plain bearings
Working basis
(1) - Plain bearing shell
(2) - Shaft
(3) - Lever
(4) - Adjusting ring
ཱི
Shafts (2) running in plain bearing shells (1) are axially adjusted when the
lever (3) and the adjusting ring (4) touch the front face of the bearing shells
(1).
When adjusting components mounted on shafts running in plain bearings,
always ensure that the axial play of these shafts is as small as possible or
even 0.
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Working basis
3.6 Locking the sewing machine in place
For some settings, the machine has to be locked in place. To do this, the
locking peg from the accessory pack is inserted into a groove on the arm
shaft crank to block the arm shaft.
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: Handwheel zero setting
• 3 mm end in the small groove
• Setting the handwheel position and checking the bottom dead
center for the needle bar
Figure 12: Locking the sewing machine in place
ཱ
ི
(1) - Groove
(2) - Locking peg
Locking the machine in place
1. Turn the handwheel until the appropriate groove (1) is in front of the
locking opening (3):
• Small groove at handwheel position 180°
• Large groove at handwheel position 200 - 205°
2. Insert the locking peg (2) with the appropriate end in the groove (1).
Removing the lock
(3) - Locking opening
1. Pull the locking peg (2) out of the groove (1).
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Working basis
3.7 Putting the handwheel into position
With some settings, the graduated scale on the handwheel must be put
into a certain position.
Figure 13: Putting the handwheel into position
ཱ
(1) - Graduated scale (2) - Marking
Setting steps
1. Turn the handwheel until the specified number on the graduated
scale (1) is next to the marking (2).
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Positioning the arm shaft
4 Positioning the arm shaft
Correct setting
The 3 setscrews (1) must be seated flush on the flat. The arm shaft crank
must be flush with the machine casting.
Cover
• Upper left cover, ( page 11).
Figure 14: Setting the arm shaft crank
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch the sewing machine off before you check and set the
position of the arm shaft crank.
(1) - Setscrews
Setting steps
1. Release all the setscrews (1) on the arm shaft crank.
2. Turn the arm shaft crank so that the setscrews (1) are seated flush on
the flat of the arm shaft.
3. Push the arm shaft to the right as far as it will go and flush with the
machine casting.
4. Tighten all the setscrews (1) on the arm shaft crank.
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Positioning the arm shaft
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Setting the handwheel scale
5 Setting the handwheel scale
Correct setting
Lock the machine in place at position 2 ( page 19).
The handwheel must be at position 180°.
Cover
• Removing and refitting the handwheel and drive belt cover
( page 13).
Figure 15: Setting the handwheel scale
WARNING
Risk of injury
Crushing injuries from moving parts.
Switch the sewing machine off before you check and set the
position of the handwheel on the arm shaft.
ི
ཱ
(1) - Screws
(2) - Handwheel
Setting steps
1. Removing the drive belt cover and handwheel ( page 13), removing
the ridged drive belt ( page 25).
2. Loosen the screws (1).
3. Fitting the drive belt cover and handwheel.
4. Lock the machine in place at position 2 ( page 19).
5. Set the handwheel (2) to 180° ( page 20).
6. Insert the hexagon wrench through the opening (3) into the set screw,
and tighten it.
7. Removing the drive belt cover and handwheel ( page 13).
(3) - Opening for the wrench
8. Tighten the screws (1).
9. Fit the ridged drive belt, drive belt cover and handwheel.
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Setting the handwheel scale
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Setting the drive
6 Setting the drive
6.1 Setting the drive ratio
WARNING
Risk of injury
Crushing injuries from moving parts.
Switch off the sewing machine before checking and setting the
drive ratio.
The machine is equipped with a 2-step pulley, by which the drive ratio between the drive motor and the machine can be changed, and the penetration force of the needle can be increased.
To change the ratio, the drive belt must be removed and the pulley
changed to the opposite position. The drive belt is then refitted and tensioned.
Cover
• Drive belt cover ( page 13).
6.1.1 Removing the drive belt
Figure 16: Removing the drive belt
(1) - Ridged drive belt
(2) - Tensioning roller
ཱ
ི
ཱི
(3) - Belt tensioner
(4) - Belt tensioner clamping screws
Setting steps
1. Undo the belt tensioner (3) clamping screws (4).
2. Rotate the tensioning roller (2) and belt tensioner (3).
3. Remove the ridged drive belt (1).
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Setting the drive
6.1.2 Adjusting the drive pulley
WARNING
Risk of injury
Switch off the sewing machine before checking and setting the
drive pulley.
Correct setting
Irrespective 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.
Figure 17: Adjusting the drive pulley
16 mm
16 mm
ཱ
ི
(1) - Driven pulley
(2) - Drive pulley
Setting steps
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. Adjust the difference in height between the faces of the drive pulley (2)
and the driven pulley (1) so that it is 16 mm.
4. Tighten the screws (3).
(3) - Adjusting screws
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Setting the drive
6.1.3 Adjusting the belt tension
WARNING
Risk of injury
Switch off the sewing machine before adjusting the belt
tension.
Correct setting
The belt must be taut so that if one presses at point 1 the maximum
deflection of the belt is approx. 2 mm.
Figure 18: Adjusting the belt tension
ྲྀ
ཱུ
ུ
ཱི
ཱ
(1) - Checking point
(2) - Hexagonal opening
(3) - Belt tensioner
(4) - Screws
Setting steps
1. Lay the ridged drive belt (7) in position.
2. Turn the tensioning roller (6) with the belt tensioner (3) against the ridged
drive belt (7).
3. Insert a hexagonal wrench into the hexagonal opening (2), tension the
ridged drive belt (7) and tighten the screws (4).
4. Check the belt tension.
(5) - Drive pulley
(6) - Tensioning roller
(7) - Ridged drive belt
ི
5. If necessary, correct the belt tension.
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Setting the drive
6.2 Adjusting the positioning of the machine
The machine remains automatically in one of two angular positions of the
main shaft (of the handwheel. The positioning can operate correctly only
when the reference position of the handwheel has been set.
A necessary precondition for the correct setting of the reference position
is that the drive ratio between the motor and main shaft is correctly input
into the machine control program.
Figure 19: Adjusting the positioning of the machine
ཱ
(1) - OP1000 control panel (2) - Handwheel
6.2.1 Determining the drive ratio in the control program
Setting steps
1. Select parameter setting mode in the field OP1000 (1) and set the parameter t 08 19 ( DAC basic/classic Service instructions).
2. Manually turn the handwheel (2) at least 2 revolutions.
A new value for the drive ratio will appear on the control panel display.
3. Acknowledge the new value by pressing the OK button.
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Setting the drive
6.2.2 Adjusting the reference position of the handwheel
Correct setting
The reference position is 105° on the handwheel scale (2).
Setting steps
1. Select parameter setting mode in the field OP1000 (1) and set the parameter t 08 10 ( DAC basic/classic Service instructions).
2. Manually turn the handwheel (2) at least one revolution and turn it to
105° on the scale ( page 20).
3. Acknowledge the set position by pressing the OK button.
4. To exit parameter setting mode, press the Esc key.
5. Switch the machine on and off.
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Setting the drive
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Setting the stitch length adjusting wheels
7 Setting the stitch length adjusting wheels
Figure 20: Stitch length adjusting wheels
ི
(1) - Button for the stitch length on the
machine arm
(2) - Lower stitch length adjusting wheel
(3) - Upper 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
On the lower adjusting wheel, it is not possible to set a larger stitch length
than on the upper adjusting wheel.
To switch over between the stitch lengths: Press the key for the stitch
length on the machine arm (1).
If the upper adjusting wheel is activated, then the key (1) lights up.
Upon switching on the machine, the stitch length adjusting wheel activated
most recently is always active.
Sequence
Set the upper stitch length adjusting wheel first and then the lower stitch
length adjusting wheel.
7.1 Setting the upper stitch length adjusting wheel
Service instructions 967 - 00.0 - 12/2014
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch the sewing machine off before you set the
upper stitch length adjusting wheel.
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Setting the stitch length adjusting wheels
Correct setting
Upper stitch length adjusting wheel to 0:
No play on the stitch regulator gear. The plates for the gear are paral-
lel, the frame cannot be moved.
Cover
• Tilt the upper section ( page 10)
Setting steps
1. Switch off the machine at the main switch.
The machine switches over to the upper stitch length adjusting wheel.
Figure 21: Setting the upper stitch length adjusting wheel I
ྲྀ
ཱུ
ཱ
ི
ུ
ཱི
(1) - Upper stitch length adjusting wheel
(2) - Screw
(3) - Lower stitch length adjusting wheel
(4) - Adjusting mark
2. Hold the upper stitch length adjusting wheel (1) using a key (7).
3. Loosen the screw (2).
4. Remove the upper stitch length adjusting wheel (1) from the shaft (5).
ATTENTION
Machine damage possible if the shaft is turned too forcefully.
If you turn the shaft too far, then parts on the stitch regulator gear could
bend or become stuck.
Turn the shaft carefully and stop as soon as you feel slight resistance.
5. Carefully turn the shaft (5) clockwise using a 10 mm wrench.
(5) - Shaft
(6) - Scale
(7) - Wrench
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Setting the stitch length adjusting wheels
Figure 22: Setting the upper stitch length adjusting wheel II
ཷ
(7) - Frame for the stitch regulator gear
6. Check whether the frame (8) for the stitch regulator gear can be moved
by pressing the stitch setting lever.
7. As soon as the frame (8) no longer moves: Remove the wrench from
the shaft (5).
8. Turn the scale (6) such that the 0 is exactly next to the adjusting mark (4).
9. Place the upper stitch length adjusting wheel (1) onto the shaft (5) and
tighten it with a wrench (7).
10. Screw down the upper stitch length adjusting wheel (1) using screw (2).
7.2 Setting the lower stitch length adjusting wheel
WARNING
Risk of injury!
The lower stitch length adjusting wheel has to be set
when the machine is switched on, because a switchover is automatically made to the upper adjusting
wheel when the machine is switched off.
Carry out all work with extreme caution.
Checking the correct setting
Sewing 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.
Cover
• Tilt the upper section ( page 10)
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Setting the stitch length adjusting wheels
Figure 23: Setting the lower stitch length adjusting wheel I
ི
ཱ
(1) - Button for the stitch length on the
machine arm
(2) - Lower stitch length adjusting wheel
(3) - Upper stitch length adjusting wheel
Setting steps
1. Position the upper stitch length adjusting wheel (3) > 3.
2. Switch machine to short stitch length.
The key for the stitch length (1) does not light up.
If the key lights up, press key (1) again.
Figure 24: Setting the lower stitch length adjusting wheel II
ཱ
ི
(1) - Upper stitch length adjusting wheel
(2) - Screw
(3) - Lower stitch length adjusting wheel
(4) - Adjusting mark
(5) - Shaft
(6) - Scale
(7) - Wrench
ྲྀ
ཱུ
ུ
ཱི
34
3. Hold the lower stitch length adjusting wheel (3) using a key (7).
4. Loosen the screw (2).
5. Remove the lower stitch length adjusting wheel (3) from the shaft (5).
ATTENTION
Machine damage possible if the shaft is turned too forcefully.
If you turn the shaft too far, then parts on the stitch regulator gear could
bend or get stuck.
Turn the shaft carefully and stop as soon as you feel slight resistance.
6. Carefully turn shaft (5) clockwise with a 10 mm wrench until you can
feel significant play on the frame for the stitch regulator gear.
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Page 37
Setting the stitch length adjusting wheels
7. Carefully turn shaft (5) anticlockwise with a 10 mm wrench until you no
longer feel any play.
8. As soon as the frame no longer moves: Remove the wrench from the
shaft (5).
9. Turn the scale (6) such that the 0 is exactly next to the adjusting mark (4).
10.Place the lower stitch length adjusting wheel (3) onto the shaft (5) and
tighten it with a wrench (7).
11.Screw down the lower stitch length adjusting wheel (3) using screw (2).
7.3 Setting the stitch length limit
If during the sewing operation not all stitch lengths are available, then you
do have the option to limit the maximum stitch length that can be set.
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch off the sewing machine before setting the
maximum stitch length limit.
12, 9, or 6 mm can be selected as the maximum stitch length. In doing so,
the appropriate throat plate has to be selected for the respective maximum
stitch length. The throat plate cut-out must be large enough that the feed
dog does not hit against the edges of the throat plate at the front and rear
dead center.
ATTENTION
Risk of damaging the feed dog due to incorrect throat plate size
If the throat plate cut-out is too small, then the feed dog can hit against
the edges.
Make sure that an appropriate throat plate is used for the maximum
stitch length set.
Correct 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
maximum stitch length set.
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Page 38
Figure 25: Setting the stitch length limit
1
2
Setting the stitch length adjusting wheels
3
(1) - Upper stitch length adjusting wheel
(2) - Screw
(3) - Mark-off openings
Setting steps
1. Position the upper stitch length adjusting wheel (1) to 0.
2. Hold the upper stitch length adjusting wheel (1) using a wrench.
3. Loosen the screw (2).
4. Remove the upper stitch length adjusting wheel (1).
5. Remove the setscrew from one of the 3 mark-off openings (3).
6. Screw the setscrew into the mark-off opening for the required maximum
stitch length. The openings are given numbers for the stitch length:
7. Turn the scale such that the 0 is exactly next to the adjusting mark.
8. Fit the upper stitch length adjusting wheel (1) and hold it using a key.
9. Tighten the screw (2).
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Setting the stitch length adjusting wheels
7.4 Setting the eccentric for the forward and backward
stitches
Correct setting
The forward and backward stitches are the same length.
As a test, sew a seam forwards, stop, and sew a seam backwards.
The insertions of the forward and backward stitches have to lie within
each other.
Cover
• Tilt the upper section ( page 10)
Figure 26: Align the stitch length for forwards and reverse sewing
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch off the sewing machine before setting the
eccentric.
ི
ཱ
(1) - Eccentric slot
(2) - Recess
Setting steps
1. Loosen the setscrew (3).
2. Turn the eccentric screw (1) from the right through the opening in the
base plate:
Basic position:
The slot in the eccentric screw (1) is parallel to the machine axis, the
recess (2) faces the front.
If the forward and backward stitches are not the same length:
(3) - Setscrew
• Turning clockwise:
The forward stitch becomes larger, the backward stitch smaller.
• Turning anticlockwise:
The forward stitch becomes smaller, the backward stitch larger.
3. Tighten the setscrew (3).
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Setting the stitch length adjusting wheels
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Page 41
Setting the feed dog
8 Setting the feed dog
The position and the movement of the feed dog and needle bar have to
be coordinated such that the needle pierces exactly in the center of the
needle hole of the feed dog.
Sequence
First check the following setting:
• Needle bar linkage ( page 47)
8.1 Setting the feed dog position
WARNING
Risk of injury
Switch the machine off before checking or adjusting the
position of the feed dog on the machine.
Correct setting
When the stitch length is set to 0 and the needle is at bottom dead center:
The center of the feed dog opening (2) is inline with the axis of the
needle.
Cover
• Tilt the upper section ( page 10).
Service instructions 967 - 00.0 - 12/2014
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Page 42
Setting the feed dog
8.1.1 Moving the feed dog
Cover
• Throat plate ( page 15)
Figure 27: Moving the feed dog on the feed dog carrier
ཱ
ི
(1) - Feed dog
(2) - Feed dog carrier
(3) - Screws
Setting steps
1. Loosen the screws (3).
2. Move the feed dog (1) on the feed dog carrier (2).
Place the removed throat plate next to it as an aid for orientation so that
the feed dog can be screwed on straight.
3. Tighten the screws (3).
8.1.2 Moving the feed dog carrier
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 upper section ( page 10)
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Page 43
Setting the feed dog
Figure 28: Moving the feed dog carrier
ཱི
ཱི
ུ
ཱུ
ཷ
ྲྀ
(1) - Adjusting ring
(2) - Screws
(3) - Stroke shaft
(4) - Clamp
(5) - Sliding shaft
(6) - Screw
(7) - Adjusting ring
(8) - Clamp
Setting steps
1. Position the upper stitch length adjusting wheel to 0.
2. Loosen the screw (6) and adjusting ring (7).
3. Loosen the screws (2) and adjusting ring (1).
4. Move the feed dog carrier across the line of the sewing direction such
that the feed dog is exactly in the center of the throat plate cut-out.
5. Push the adjusting ring (1) and clamp (4) towards each other as far as
they will go.
When doing this, make sure that the stroke shaft (3) is firmly held by
the clamp (4) and adjustment ring (1).
6. Tighten the setscrew of the adjustment ring (1) and the screws (2).
7. Push the adjusting ring (7) and clamp (8) towards each other as far as
they will go.
When doing this, make sure that the sliding shaft (5) is firmly held by
the clamp (8) and adjustment ring (7).
8. Tighten the setscrew of the adjustment ring (7) and the screw (6).
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Setting the feed dog
8.2 Adjusting the feed dog movement
The feed dog moves on an elliptical path. To align this correctly, both the
feed movement and the stroke height and stroke movement of the feed
dog have to be set.
Sequence
First check the following setting:
• Feed dog ( page 39)
8.2.1 Adjusting the forwards movement
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch the sewing machine off before you check
and set the forwards movement of the feed dog.
The correct setting for the feed movement is checked at standstill and set
using the pusher eccentric.
Correct setting
Handwheel at the 190° position and set the upper stitch length adjusting
wheel to the maximum stitch length.
If the stitch regulator is pressed down, the feed dog stops.
Cover
• Take off the upper right cover ( page 11)
Figure 29: Setting the forwards movement for the feed dog
ི
ཱ
42
(1) - Setscrews
(2) - Pusher eccentric
(3) - Stitch adjustment lever
Service instructions 967 - 00.0 - 12/2014
Page 45
Setting the feed dog
Setting steps
1. Set the upper stitch length adjusting wheel to the maximum stitch length.
2. Loosen the setscrews (1).
3. Put the handwheel into the 190° position.
4. Press the stitch adjustment lever (3) downwards and observe the feed
dog and needle as you do so.
5. Turn the pusher eccentric (2) such that the feed dog and needle no
longer move when the stitch adjustment lever (3) is pressed.
6. Tighten the setscrews (1).
8.2.2 Setting the feed dog height at top dead center
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch off the sewing machine before checking and
setting the feed dog height.
The feed dog reaches the maximum stroke height at top dead center when
the position of the handwheel is 190°.
Correct setting
Place the feed dog in the uppermost position by turning the handwheel.
The upper edge of the feed dog protrudes 1.3 mm above the throat
plate.
Cover
• Tilt the upper section ( page 10).
Figure30: Setting the height of the feed dog
ཱ
(1) - Feed dog carrier (2) - Setscrew
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Setting the feed dog
Setting steps
1. Place the feed dog at top dead center.
2. Loosen the setscrews (2).
3. Push the feed dog carrier (1) upwards so that the upper edge of the
feed dog protrudes 1.3 mm above the throat plate.
4. Tighten the setscrews (2).
8.2.3 Adjusting the stroke movement
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch the sewing machine off before you check
and set the stroke movement of the feed dog.
Sequence
First check the following setting:
• feed dog height ( page 43)
Correct setting
The upper edge of the feed dog must be the same height when the feed
dog is at front dead center (handwheel position 90°) as when it is at rear
dead center (handwheel position 270°).
At 90° the feed dog is moving upwards; at 270° it is moving downwards.
Cover
• Take off the upper right cover ( page 11)
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Page 47
Setting the feed dog
Figure 31: Setting the feed dog stroke
(1) - Setscrews (2) - Stroke eccentric
ཱ
Setting steps
1. Loosen the setscrews (1).
2. Put the handwheel into the 90° position.
3. Turn the stroke eccentric (2) such that the upper edge of the feed dog
when moving upwards is at the same height as the upper edge of the
throat plate.
4. Tighten the setscrews (1).
5. Check that the feed dog has the same height at 90° as it has at 270°; if
necessary, adjust it.
Service instructions 967 - 00.0 - 12/2014
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Page 48
Setting the feed dog
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Page 49
Aligning the needle bar linkage
9 Aligning the needle bar linkage
The precondition for performing adjustment is that the axial movement
of pins and shafts running in plain bearings is correctly restricted
( page 18).
9.1 Moving the needle bar linkage laterally
Correct setting
WARNING
Risk of injury
Switch the machine off before checking or adjusting the
alignment of the needle bar on the machine.
When the stitch length is set to 0 and the value 90° is set on the handwheel
scale:
Needle bar (4), sewing foot bar (5) and presser foot bar (6) are all in
a line.
Cover
• Upper covers ( page 11).
• Front cover ( page 12).
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Page 50
Figure 32: Lateral alignment of the needle bar
ཱི
Aligning the needle bar linkage
ཱ
ཷ
ྲྀ
ཱུ
ི
(1) - Screw
(2) - Screws
(3) - Screws
(4) - Needle bar
(5) - Sewing foot bar
(6) - Presser foot bar
(7) - Needle bar guide
(8) - Screw
ུ
Setting steps
1. Set the stitch length to 0.
2. Put the handwheel into the 90° position ( page 20).
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 guide (7) laterally so that the needle bar (4), sewing
foot bar (5) and presser foot bar (6) are all in a line.
8. Tighten the screws (1), (2), (3), (8).
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Aligning the needle bar linkage
ཱ
9.2 Aligning the needle bar linkage in the sewing direction
Correct setting
When the stitch length is set to 0 and the value 90° is set on the handwheel
scale:
The needle bar (2) must be parallel to the presser foot bar (3).
Cover
• Upper covers ( page 11).
Figure 33: Aligning the needle bar in the direction of sewing
L
ི
(1) - Screw for the upper feed lever
(2) - Needle bar
Setting steps
1. Undo the screw for the upper feed lever (1).
2. Turn the needle bar (2) so that it is parallel to the presser foot bar (3):
Set the distance between the bars to the value L = 44 mm.
3. Tighten the screw (1) and check the axial play ( page 18).
(3) - Presser foot bar
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Aligning the needle bar linkage
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Service instructions 967 - 00.0 - 12/2014
Page 53
Position of the hook and needle
10 Position of the hook and needle
10.1 Tensioning the hook drive belt
A special measurement tool is required to achieve the necessary setting.
If you have to guess at the setting for the belt tension, bear the following
points in mind:
• If the tension is too high, the working life of the belt and ball bearings is
reduced.
• If the tension is too low, the belt may jump off the pulleys.
WARNING
Risk of injury
Switch the machine off before checking or setting the hook
and needle bar on the machine.
Correct setting
When the toothed belt (2) is pressed in the direction of the arrow, about
midway between the pulleys, the belt should deflect about 3 mm.
Cover
• Drive belt cover ( page 13).
• Tilt the upper section ( page 10).
Figure 34: Tensioning the hook drive belt
ི
ཱ
(1) - Eccentric pin
(2) - Toothed belt
(3) - Adjusting screw
Setting steps
1. Loosen the adjusting screw (3).
2. Turn the eccentric pin (1) with the tensioning pulley, and tension the
toothed belt (2).
3. Tighten the adjusting screw (3).
Note that a low tightening torque when turning the eccentric pin (1) can
lead to a high tension of the toothed belt.
4. Check the belt tension and adjust it if necessary.
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Position of the hook and needle
10.2 Adjusting the dead point of the reciprocating movement
of the drive
Correct setting
The driver is at the dead point at 155°.
Cover
• Upper right cover ( page 12).
• Tilt the upper section ( page 10).
Figure 35: Dead point of the reciprocating movement of the drive
ཱ
ི
(1) - Eccentric
(2) - Screws
(3) - Dead point
Setting steps
1. Loosen the screws (2).
2. Turn the eccentric (1).
3. Tighten the screws (2).
4. Check that the dead point (3) is at 155°, adjust it if again necessary.
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Position of the hook and needle
10.3 Setting the loop stroke position
Correct setting
When the stitch length is set to 0 and the machine is stopped at position 1:
The tip of the hook (3) is central to the axis of the needle.
Figure 36: Setting the loop stroke position
ཱི
ི
ཱ
(1) - Screw
(2) - Screws
Setting steps
1. Set the stitch length to 0.
2. Locking the machine in place ( page 19).
3. Loosen the screw (1).
4. Loosen the screws (2).
5. Turn the tip of the hook (3) so that it is central to the axis of the needle.
6. Tighten the screws (2).
7. Tighten the screw (1).
(3) - Tip of the hook
(4) - Groove
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Position of the hook and needle
10.4 Setting the hook clearance
Correct setting
Lock the machine in place at position 1.
Maximum 0.1 mm distance between the tip of the hook and the
groove.
When the tip of the hook moves past the needle and the needle and tip
are pressed together they must not touch each other.
Cover
• Throat plate ( page 15).
• Feed dog ( page 16).
• Plate ( page 14).
• Tilt the upper section ( page 10).
Figure 37: Setting the hook clearance
ྲྀ
ཱ
ི
ཱི
ཱ
ཱུ
ུ
(1) - Hook cage
(2) - Needle
(3) - Tip of the hook
(4) - Openings for the cage tightening
screws
(5) - Drive shaft
(6) - Tip of the hook
(7) - Screw
54
Setting steps
1. Lock the machine in place at position 1.
2. Undo the screws in the openings (4).
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Page 57
Position of the hook and needle
3. Move the hook cage (1) so that the distance of the tip of the hook (3)
from the needle (2) is max. 0.1 mm.
4. Tighten the screws in the openings (4).
5. Loosen the screw (7).
6. Move the drive shaft (5) aside so that it lightly touches the needle (2)
7. Tighten the screw (7).
8. Check that the tip of the hook (6) is touching the needle (2), if necessary
adjust the drive shaft (5) again.
10.5 Adjusting the loop former
The loop former (3) guides the loop in the thread in the needle towards the
tip of the hook and thus increases the reliability of catching the thread. Its
lateral position must be adjusted by means of the distance piece (2) to suit
the thickness of the needle.
ATTENTION
Incorrect setting of the loop former can cause damage to the hook.
After the hook has been fitted it is essential to check that the needle has
sufficient clearance to pass through between the hook drive dog (4) and
the loop former (3).
Cover
• Tilt the upper section ( page 10).
Figure 38: Setting the loop former
ཱ
ཱི
ི
ི
(1) - Screws
(2) - Distance piece
Setting steps
1. Unscrew the screws (1).
2. Take out the loop former (3) and distance piece* (2).
Service instructions 967 - 00.0 - 12/2014
(3) - Loop former
(4) - Hook drive dog
55
Page 58
Position of the hook and needle
3. Select the appropriate distance piece* (2) for the thickness of the needle
that is being used.
4. Insert the loop former (3) and distance piece* (2).
5. Tighten the screws (1).
* Distance pieces are contained in the machine accessories pack.
10.6 Setting the needle bar height
WARNING
Risk of injury!
Risk of crushing injuries and stab wounds from moving and sharp parts.
Switch off the sewing machine before checking and
setting the needle bar height.
Sequence
First check the following settings:
• Loop stroke position ( page 53)
• A straight and undamaged needle must be inserted
( Operating manual section, Inserting and replacing the needle)
Correct setting
Machine locked in place in position 1 (( page 19)) and upper stitch
length adjusting wheel set to 0.
The tip of the hook is level with the lower third of the groove for the
needle.
Faults caused by an incorrect needle bar height
• Damage to the tip of the hook
• Jamming of the needle thread
• Missing stitches
• Thread breakage
• Needle breakage
56
Cover
• Head cover ( page 12)
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Page 59
Position of the hook and needle
Figure 39: Setting the needle bar height
ཱ
ཱི
ི
(1) - Screw
(2) - Needle bar
(3) - Tip of the hook
(4) - Groove for the needle
Setting steps
1. Lock the machine in place at position 1 ( page 19).
2. Position the upper stitch length adjusting wheel to 0.
3. Loosen the screw (1) for the needle bar (2).
4. Move the height of the needle bar (2) such that the tip of the hook (3)
is in the middle of the lower third of the groove for the needle (4).
Do not twist the needle to the side in doing so. The groove (4) must
face towards the hook.
5. Tighten the screw (1) for the needle bar (2).
6. Release the locking mechanism ( page 19).
7. Check the height of the needle bar at maximum stitch length when sewing forwards and reverse, adjust it again if necessary.
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Position of the hook and needle
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Page 61
Adjusting the sewing foot feed
11 Adjusting the sewing foot feed
11.1 Adjusting the zero stroke of the feet, tension force of the
torsion spring
In order to adjust the sewing foot stroke mechanism ( page 61) the zero
stroke of the sewing feet must be precisely adjusted, with the upper machine cover removed. This is the case when the connecting rods (1) are in
a line.
WARNING
Risk of injury
Switch the machine off before checking or adjusting the
position of the sewing foot feed on the machine.
Correct setting
When the connecting rods (1) are in a line.
The ball-ended pin (7) is touching the stop screw (9).
The torsion spring is twisted 15° to 20°.
Cover
• Arm cover ( page 11)
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Adjusting the sewing foot feed
Figure 40: Setting the zero stroke of the feet and the tension force of the torsion spring
ླྀ
ཷ
ཱ
ྲྀ
ཱུ
ུ
ཱི
ི
(1) - Connecting rod
(2) - Frame
(3) - Pin
(4) - Screw opening
(5) - Torsion spring
(6) - Screw
(7) - Ball-ended pin
(8) - Locknut
(9) - Stop screw
Setting steps
1. Undo the screw in the opening (4).
2. Release the locknut (8).
3. Rotate the frame (2) so that the connecting rods (1) are in a line.
4. Turn the stop screw (9) so that the ball-ended pin (7) is in contact with
it, and the connecting rods (1) remain in a line.
5. Tighten the locknut (8).
6. Turn the torsion spring (5) with the pin (3) 15° to 20° in the direction of
the arrow, and tighten the screw in the opening (4).
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Adjusting the sewing foot feed
11.2 Adjusting the drive dog for the presser foot bar
Correct setting
When the stitch length is set to 0 and both feet (8) and (9) are at the same
height:
The drive dog (15) is attached to the presser foot bar (10) in such as
position that the needle shank inserted into the opening (11) touches
the presser foot bar (10).
Cover
• Arm cover ( page 11)
• Head cover ( page 12)
Figure 41: Adjusting the presser foot bar drive dog
ཱ
ི
ཱི
ུ
ཱུ
ཾ
ཽ
ོ
ཻ
ེ
ཹ
ྲྀ
(1) - Screw
(2) - Pin
(3) - Screws
(4) - Shaft
(5) - Gully
(6) - Assembly
(7) - Plate
(8) - Presser foot
Setting steps
1. Put the handwheel into the 0° position ( page 20).
2. Set the stitch length to 0.
3. Loosen the screws (3).
4. Loosen the screw (1).
5. Take off the assembly (6) together with the shaft (4) and the pin (2).
6. Release the driving dog screw (14).
7. Take out the plate (7) and insert it under the feet with the flat faces
upwards.
(9) - Sewing foot
(10) - Presser foot bar
(11) - Opening for the needle shank
(12) - Slide nut
(13) - Lever
(14) - Driving dog screw
(15) - Driving dog
ླྀ
ཷ
ྲྀ
8. Insert the needle shank into the opening (11), turn the lever (13) so that
the needle shank touches the presser foot bar (10) and at the same time
press both feet (8) and (9) on to the plate (7).
9. Tighten the driving dog screw (14).
10.Refit the assembly (6). Make sure there is axial clearance of 0.2 to
0.3 mm between the slide nut (12) and the floor of the gully (5).
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Adjusting the sewing foot feed
11.3 Aligning the feed stroke of the feet
The main purpose of this adjustment is to ensure that at the start of feeding the presser foot is lifted above the material and the material feeding
movement is not prevented by the sewing foot.
Correct setting
When the stitch length is set to 0 and the stroke of the foot is set to 0:
The lever is attached to the lift bar of the feet by the screw (5) in such
a way that the presser foot (1) is 0.3 mm than the sewing foot (2).
Cover
• Arm cover ( page 11)
• Head cover ( page 12)
Figure 42: Aligning the feed stroke of the feet
ུ
ཱ
ི
ཱི
(1) - Presser foot
(2) - Sewing foot
(3) - Plate
Setting steps
1. Put the handwheel into the 0° position ( page 20).
2. Set the stitch length to 0.
3. Adjust the zero stroke of the feet ( page 59).
4. Loosen the screw (5).
5. Take the plate (3) out of its working position (4), turn it round and place
it under the feet as illustrated so that the sewing foot (2) is 0.3 mm lower
than the presser foot (1).
6. Move both feet manually down to the stop.
7. Tighten the screw (5).
(4) - Working position of the plate (3)
(5) - Screw fro the lever for raising the feet
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Adjusting the sewing foot feed
11.4 Setting the stroke movement for the feeding foot
For correct feed, the stroke movement for the feeding foot must be aligned
to the stroke movement for the feed dog.
Correct setting
Left adjusting wheel for the sewing foot stroke set to maximum stroke and
the upper stitch length adjusting wheel to 0.
The feeding foot (1) touches down exactly on the feed dog (2) when
the downwards movement of the needle tip (3) reaches the upper
edge of the feeding foot. This will occur when the handwheel is in the
95° position.
WARNING
Risk of injury!
Risk of crushing injuries and stab wounds from moving and sharp parts.
Switch the sewing machine off before you check
and set the stroke movement for the feeding foot.
Figure 43: Stroke movement for the feeding foot and feed dog
1
(1) - Feeding foot
(2) - Feed dog
3
2
(3) - Needle tip
Cover
• Arm cover ( page 11)
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Adjusting the sewing foot feed
Figure 44: Setting the point in time for when the feeding foot touches down
ཱ
ཱི
ི
(1) - Stroke eccentric
(2) - Setscrews
(3) - Plates
(4) - Setscrew
Setting steps
1. Screw in the setscrew (4) so that a stroke is available.
2. Position the upper stitch length adjusting wheel to 0.
3. Loosen the setscrews (2).
4. Turn the stroke eccentric (1) such that the feeding foot touches down
on the feed dog when the handwheel is in the 95° position and the tip
of the needle is at the height of the upper edge of the feeding foot.
When doing this, do not move the stroke eccentric (1) laterally on the
axle.
5. Tighten the setscrews (2).
6. Unscrew the setscrew (4) far enough so that the clips (3) are once again
in a line.
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Adjusting the foot stroke
12 Adjusting the foot stroke
12.1 Adjusting the foot stroke generated by the hand lever
The hand lever (1) permits the feet to be raised to the height of 14 and
20 mm. The extent of the two strokes is determined by the dimensions of
the elements of the lift mechanism.
Correct setting
The presser foot must lie on the throat plate, the hand lever (1) must be in
the inactive position:
WARNING
Risk of injury
Switch the machine off before checking or adjusting the stroke
of the feet on the machine.
The lift lever (3) has a guaranteed clearance of 0.3 to 0.5 mm to the
driving dog (4).
Cover
• Head cover ( page 12)
Figure 45: Setting the thrust movement of the feed dog
ུ
ཱ
ཱི
ི
(1) - Hand lever
(2) - Screw
(3) - Lift lever
(4) - Driving dog
(5) - Hexagon wrench
Setting steps
1. Put the handwheel into the 0° position ( page 20). The presser foot
must be lying against the throat plate.
2. Undo the screw (2) and leave the wrench (5) in it.
3. Turn the lift lever (3) so that there is a clearance of 0.3 to 0.5 mm between
the lift lever (3) and the driving dog (4).
4. Tighten the screw (2).
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Adjusting the foot stroke
12.2 Adjusting the foot stroke generated by the pneumatic
cylinder
Correct setting
The stroke of the presser foot generated by the pneumatic cylinder is
30 mm.
Figure 46: Adjusting the stroke of the feet generated by the pneumatic cylinder
ཱ
ི
30 mm
(1) - Locknut
(2) - Screw
(3) - Presser foot
Setting steps
1. Put the handwheel into the 0° position ( page 20). The presser foot
(3) must be lying against the throat plate.
2. Release the locknut (1).
3. Activate the pneumatic lifting of the foot ( see Operating Manual 967).
The presser foot (3) will be lifted.
4. Turn the screw (2) until the height of the presser foot (3) is 30 mm above
the throat plate.
5. Tighten the locknut (1).
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Adjusting the thread system
13 Adjusting the thread system
13.1 Setting the thread tensioning spring
The thread tensioning spring (2) tensions the needle thread before the
needle penetrates into the material, so that the thread cannot get under
the needle and be impaled by it.
If the overall thickness of the material is very thin or very thick, the setting
of the spring travel must be adjusted to suit.
Thin material: normal spring travel (basic position: horizontal)
Thick material: long spring travel (basic position: vertically downwards)
WARNING
Risk of injury
Switch the machine off before checking or adjusting the thread
system on the machine.
Standard setting
• The home position of the thread tensioning spring (2) is horizontal.
• On the home position the spring is turned through 90°.
Figure 47: Setting the thread tensioning spring
ཱི
ཱ
(1) - Screw
(2) - Thread tensioning spring
(3) - Body
(4) - Sleeve
ི
Setting steps
1. Loosen the screw (1).
2. Turn the body (3).
3. Turn the sleeve (4) anticlockwise.
4. Restrain the sleeve (4) and body (3) against turning, and tighten the
screw (1).
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Adjusting the thread system
13.2 Setting the winder
The winder is driven by its own electric motor. After it has wound the bobbin it switches off automatically.
WARNING
Risk of injury
Switch the machine off before checking or adjusting the winder
on the machine.
Correct setting – part 1
The regulating screw (2) is tightened so that the arms of the winder
lever (1) are approximately parallel.
The winder is switched off mechanically when the winder pulley (5) reaches a distance of L = 8 mm from the internal diameter of the bobbin (4) –
the roller is approx. 1 mm below the outer diameter of the bobbin.
When the winder has switched off and is locked in the home position:
The winder pulley (5) is located at a distance of L=14 mm from the
internal diameter of the bobbin.
Cover
• Thread tensioning plate ( page 13).
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Adjusting the thread system
Figure 48: Adjusting the winder – part 1
ཱ
ེ
ི
ཱི
ཹ
ུ
L
0.5 mm
ཱུ
ྲྀ
ླྀ
ཷ
(1) - Bobbin lever
(2) - Regulating screw
(3) - Locknut
(4) - Bobbin
(5) - Winder pulley
(6) - Switch-off lever
(7) - Spring
(8) - Blocking cam
(9) - Blocking lever
(10) - Screw
(11) - Screw
Setting steps
1. Release the locknut (3).
2. Tighten the regulating screw (2) so that the arms of the winder lever (1)
are approximately parallel.
3. Adjust the winder pulley (5) to a distance of L=8 mm from the internal
diameter of the bobbin (4).
4. Loosen the screw (11).
5. Swing the switch-off lever (6) into the switch-off position, at which the
edge of the spring (7) rests against the edge of the switch-off lever (6).
6. Tighten the screw (11).
7. Check that the winder switches off when the winder pulley (5) reaches
8 mm from the internal diameter of the bobbin (4); if necessary correct
the setting.
8. Turn the winder lever (1) to the position 0 (winder switched off).
9. Loosen the screw (10).
10.Adjust the blocking lever (9) to the base of the recess in the blocking
cam (8).
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Adjusting the thread system
11.Set the axial play of the blocking cam (8) to approx. 0.5 mm
(see illustration).
12.Keep the blocking cam (8) at the set position.
13.Adjust the winder pulley (4) to a distance of L=14 mm from the internal
diameter of the bobbin.
14.Tighten the screw (10).
Correct setting – part 2
If the winder is switched off:
The distance between the friction disc (12) and rubber pulley (11) is
0.5 mm.
The drive motor is not switched off by the microswitch (7) until the friction
disc (12) is out of contact with the rubber pulley (11).
The winder is switched off when the thread has been wound up to 0.5 to
1 mm below the outer diameter of the bobbin (4).
Cover
• Thread tensioning plate ( page 13).
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Adjusting the thread system
ཻ
Figure 49: Adjusting the winder – part 2
ཱ
ི
ཱི
ུ
ཱུ
ེ
0.5 mm
ཹ
ླྀ
ྲྀ
ཷ
(1) - Bobbin lever
(2) - Screw
(3) - Locknut
(4) - Bobbin
(5) - Blocking lever
(6) - Blocking cam
Setting steps
1. Turn the winder lever (1) to the position 0 (winder switched off).
2. Loosen the screw (10).
3. Turn the eccentric (9) so that there is a gap of 0.5 mm between the
friction disc (12) and rubber pulley (11).
4. Tighten the screw (10).
5. Loosen the screws (8).
6. Adjust the position of the microswitch (7).
7. Tighten the screws (8).
8. Turn the blocking cam (6) in the direction of the arrow and switch on the
winder so that the blocking lever (5) rests on the outer diameter of the
blocking cam (6).
(7) - Microswitch
(8) - Screws
(9) - Eccentric
(10) - Screw
(11) - Rubber pulley
(12) - Friction disc
The microswitch must not switch off (a clicking within the microswitch
indicates when it switches off).
9. Turn the winder shaft until the blocking lever (5) engages in the recess
in the blocking cam (6).
In this position the microswitch (7) must switch the motor off. If it does
not do this, correct the position of the microswitch.
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Adjusting the thread system
10.Mount the thread tensioning plate with the winder on to the machine.
11.Test the winder for correct operation. Check that the winder switches
off when the thread has been wound up to 0.5 to 1 mm below the outer
diameter of the bobbin (4).
If it does not do so, tighten screw (2) or back it off, and repeat the test.
Once the desired result has been obtained, tighten the locknut (3).
13.3 Adjusting the hook-thread guide
WARNING
Risk of injury
Switch off the machine before making adjustments.
Correct setting
The thread tensioning element (4) must be at a distance from the machine
arm such that the bobbin (2) is wound equally at both ends.
If due to the position of the thread tensioning element (4) the bobbin (2)
cannot be wound equally at both ends, the inclination of the hook-thread
guide (3) must be changed to achieve this.
Cover
• Upper right cover ( page 11).
Figure 50: Adjusting the thread tensioner and guide ahead of the winder
ཱ
ི
ུ
ཱི
72
(1) - Setscrews
(2) - Bobbin
(3) - Hook-thread guide
(4) - Thread tensioning element
(5) - Screw
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Adjusting the thread system
Setting steps
1. Pull the thread in and wind it on to the bobbin.
2. If the thread is concentrated at one end of the bobbin, undo screw (5)
and align the thread tensioning element (4) so that it is central to the
thread guide.
3. Tighten the screw (5).
4. If no satisfactory result is obtained in terms of point 2, incline the thread
guide (3) using the setscrews (1).
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Adjusting the thread system
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Adjusting the thread cut-off
14 Adjusting the thread cut-off
14.1 Adjusting the thread cut-off point
Correct setting
The left edge of the lever (2) must be at a distance of 81.5 mm from the
right edge of the arm (5). The control cam (3) is located at a distance of
1 mm from the lever (2).
When the pulley (7) is engaged in the setting gully of the control cam (6):
The handwheel scale indicates 120°.
WARNING
Risk of injury
Switch the machine off before checking or adjusting the thread
cut-off on the machine.
Cover
• Upper right cover ( page 11).
Figure 51: Setting the position of the lever using the pulley and the control cam
81.5 mm
1 mm
ཱ
ི
ྲྀ
ཱུ
ཱི
ུ
(1) - Screw
(2) - Lever
(3) - Control cam
(4) - Screws
(5) - Edge of the arm
(6) - Setting gully
(7) - Pulley
Setting steps
1. Loosen the screw (1).
2. Adjust the lever (2) to a distance of 81.5 mm from the right edge of the
arm (5).
3. Tighten the screw (1).
4. Undo the screw (4) and set the handwheel to a scale position 120°.
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Adjusting the thread cut-off
5. Move the control cam (3) to a distance of 1 mm from the lever (2), manually press the lever down and manually rotate the control cam until the
pulley (7) engages in the setting gully (6).
6. Tighten the screws (4).
14.2 Basic setting of the thread cutter
Correct setting
When the stop lever (6) is touching the baseplate (5) of the machine:
The distance between the control cam (4) and the roller (1) must be
0.1 to 0.2 mm.
The piston of the pneumatic cylinder must be 0.5 to 1 mm from the
base of the cylinder (it must not be touching it).
Cover
• Upper right cover ( page 11).
• Tilt the upper section ( page 10).
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Adjusting the thread cut-off
Figure 52: Basic setting of the thread cutter
ཱ
ི
ཱི
ུ
ཱུ
ོ
ཻ
ྲྀ
ེ
ཹ
ླྀ
ཷ
(1) - Roller
(2) - Gage
(3) - Upper lever
(4) - Control cam
(5) - Base plate
(6) - Stop lever
(7) - Screws
(8) - Piston
(9) - Screws
(10) - Lever
(11) - Screws
(12) - Lower lever
(13) - Lower shaft
Setting steps
1. Undo the screws (7) of the stop lever (6) and the screws (9) of the
lever (10).
2. Secure the screws (11) for the lower lever (12) to the flat on the lower
shaft (13) and tighten both screws.
3. Put the handwheel into the 80° position page 20.
4. Lightly tighten the screws (7) of the stop lever (6), to that the stop lever
(7) can be turned on the lower shaft (13) with a slight frictional torque.
5. Insert a 0.1 mm feeler gage (2) between the control cam (4) and roller (1).
6. Press the upper lever (3) down and at the same time turn the stop
lever (6) until it contacts the baseplate (5).
7. Tighten both screws of the eccentric lever (7).
8. Check the distance between the roller (1) and control cam (4), and adjust
it if necessary.
9. Turn the piston (8) until it is just short of the stop (approx. 0.5 mm distance).
10.Tighten the screws (9) for the lever (10).
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Adjusting the thread cut-off
14.3 Adjust the position of the movable knife.
Correct setting
The axis (tip) of the needle (1) is at the left edge of the gully of the movable
knife (2).
If the stop lever (3) is in the park position:
The marking of the movable knife (7) will be covered by the blade of
the fixed knife (8).
Cover
• Throat plate ( page 15)
• Feed dog ( page 16)
• Tilt the upper section ( page 10).
Figure 53: Adjusting the position of the movable knife.
ཷ
ཱ
ྲྀ
ི
ཱི
ུ
ཱུ
(1) - Needle axis
(2) - Movable knife
(3) - Stop lever
(4) - Shaft
(5) - Screw
(6) - Lever of the knife
(7) - Marking on the knife
(8) - Fixed knife blade
78
Setting steps
1. Put the handwheel into the 270° position page 20.
2. Swing out the movable knife (2).
3. Loosen the screw (5).
4. Move the lever of the movable knife (6) aside, so that the axis (tip) of
the needle (1) is at the left edge of the gully of the movable knife (2).
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Adjusting the thread cut-off
5. Gently tighten the screw (5) so that the lever (6) can be turned on the
shaft (4) with slight frictional torque.
6. Restrain the stop lever (3) in the park position and turn the lever (6) so
that the marking on the knife (7) is covered by the blade of the fixed
knife (8).
7. Tighten the screw (5).
14.4 Adjusting the lateral position of the movable knife
Correct setting
The fixed knife (1) must be in line with the movable knife (2) on both sides.
Cover
• Throat plate ( page 15)
• Feed dog ( page 16)
• Tilt the upper section ( page 10).
Figure 54: Adjusting the lateral position of the fixed knife.
ཱ
ཱི
ི
(1) - Fixed knife
(2) - Movable knife
Setting steps
1. Loosen the screws (3).
2. Move the bracket (4) sideways so that the fixed knife (1) is parallel to
the movable knife (2).
3. Tighten the screws (3).
(3) - Screws
(4) - Bracket
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Adjusting the thread cut-off
14.5 Adjusting the cutting pressure of the knife
Correct setting
The cutting pressure should be as low as possible, consistent with cutting
the thread reliably.
Faults caused by an incorrect setting
• Very rapid wear of the knife if the pressure is set too high
Cover
• Tilt the upper section ( page 10).
Figure 55: Setting the cutting pressure of the knife
ཱ
(1) - Regulating screw (2) - Movable knife
Setting steps
1. Put the handwheel into the 270° position page 20.
2. Swing out the movable knife (2).
3. Adjust the cutting pressure, using the regulating screw (1).
4. Check the knife for correct operation and adjust it if necessary.
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Adjusting the thread cut-off
14.6 Adjusting the hook thread clamp
Correct setting
If the hook thread clamp (4) is set to the correct pressure:
The end of the hook thread (1) at the start of the seam must be 40 -
50 mm long.
Cover
• Tilt the upper section ( page 10).
Figure 56: Adjusting the hook thread clamp
ཱི
40-50 mm
ི
ཱ
(1) - End of the hook thread
(2) - Screw
(3) - Eccentric
(4) - Hook thread clamp spring
Setting steps
1. Perform a few short seams, cutting off the thread at the end of each seam.
2. Measure the lengths of the ends at the hook thread (1) at the start of
the seams.
• If the thread ends (1) are shorter than 40 mm: Increase the pressure
at the hook thread clamp (4):
- Undo the screw (2).
- Turn the eccentric (3) slightly anticlockwise.
- Tighten the screw (2).
Proceed in this way until a satisfactory result is obtained.
• If the thread ends (1) are longer than 50 mm: Reduce the pressure
at the hook thread clamp (4):
- Undo the screw (2).
- Turn the eccentric (3) slightly clockwise.
- Tighten the screw (2).
Proceed in this way until a satisfactory result is obtained.
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Adjusting the thread cut-off
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Soft start
15 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.
Setting
The setting can only be changed via the software DAC basic/classic
( see Service instructions DAC basic/classic, setting the soft start).
Figure 57: Soft start
(1) - OP1000 control panel
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Soft start
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Page 87
Maintenance
16 Maintenance
16.1 Cleaning the filter element
WARNING
Risk of injury
Before cleaning the filter element, switch the machine off at
the main switch and disconnect it from the compressed air
supply.
Figure 58: Cleaning the filter element
6
4
8
2
10
0
ཱ
ི
(1) - Filter element
(2) - Water separator
Cleaning steps
1. Drain the condensed water ( see Operating instructions).
2. Unscrew the water separator (2).
3. Unscrew the filter element (1).
4. Clean the filter element (1).
5. Clean the filter tray.
ATTENTION
Damage to the filter due to solvent-based cleaning agents
Solvent-based cleaning agents will damage the filter.
Use only solvent-free materials for washing out the filter tray.
6. Screw in the filter element (1).
(3) - Drain screw
7. Screw in the water separator (2).
8. Screw in the drain screw (3).
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Maintenance
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Page 90
DÜRKOPP ADLER AG
Potsdamer Straße 190
33719 Bielefeld
GERMANY
Phone +49 (0) 521 / 925-00
E-mail marketing@duerkopp-adler.com
www.duerkopp-adler.com
Subject to design changes - Printed in Germany - © Dürkopp Adler AG - Service Instructions - 0791 967640 EN - 00.0 - 12/2014
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