Minerva Boskovice 4182i-1 User manual

Instruction manual
4182i - 1
Minerva Boskovice, a.s., Sokolská 60, CZ - 680 17 Boskovice
Tel.: [phone], 453433, 494111 Fax: [phone] http://www.minerva-boskovice.com
Edition/Vydáno/Herausgegeben/Edition/Editado: 05/2009
Printed/Tisk/Druck/Imprimé/Impress ã o: Czech Republic S735 000688

Contents - part A - Instruction manual:
1. Proper use of the machine .................................................................................................................................................. 1
2. Description of the machine ................................................................................................................................................. 1
3. Machine sub-classes and sewing categories .................................................................................................................... 2
3.1 Sub-class .................................................................................................................................................................. 2
3.2 Sewing categories .................................................................................................................................................... 2
4. Survey of equipment ............................................................................................................................................................ 2
4.1 Equipment ................................................................................................................................................................. 2
4.1.1 Needles ........................................................................................................................................................... 2
4.1.2 Wheel feeders ................................................................................................................................................. 2
4.1.3 Top roller holders ........................................................................................................................................... 2
4.1.4 Top rollers ....................................................................................................................................................... 3
4.1.5 Throat plate .................................................................................................................................................... 3
4.1.6 Throat plate inserts ........................................................................................................................................ 3
4.1.7 Trimer knives .................................................................................................................................................. 3
4.1.8 Gauge for knife setting ................................................................................................................................... 3
4.1.9 Connecting cables of the head to the drive................................................................................ .................... 3
4.2 Optional eqiupment ................................................................................................................................................. 3
5. Technical data ..................................................................................................................................................................... 3
6. Operation of the machine .................................................................................................................................................... 5
6.1 Threading a thread ................................................................................................................................................... 5
6.2 Bobbin thread winding ............................................................................................................................................. 5
6.3 Inserting the bobbin and threading the lower thread ............................................................................................ 5
6.4 Regulating the thread tension ................................................................................................................................6
6.5 Needle replacement ................................................................................................................................................. 7
6.6 Regulation of pressing the top roller ...................................................................................................................... 7
6.7 Lifting the top roller up ............................................................................................................................................ 7
6.8 Reverse stitching...................................................................................................................................................... 8
6.9 Stitch length adjustment .......................................................................................................................................... 8
6.10 Safety clutch ............................................................................................................................................................. 8
6.11 Starting of the material trimming operation .......................................................................................................... 8
6.12 Control of the material guide regardless the engaged trimming ......................................................................... 9
6.13 Control of the material guide with regard to the engaged trimming device ........................................................ 9
6.14 Setting of the material guide .................................................................................................................................. 9
6.15 Replacement of the trimming knife ........................................................................................................................ 10
6.16 Setting of the trimming device for trimming very small radii ............................................................................... 10
6.17 Setting of the trimming device for trimming thin, soft materials ......................................................................... 10
6.18 Change of the sewing category ............................................................................................................................... 10
6.19 Sharpening of the knives ......................................................................................................................................... 10
7. Electronic control of the machine ...................................................................................................................................... 11
7.1 Control of sewing by means of control elements ................................................................................................... 11
7.1.1 Via treadle ....................................................................................................................................................... 11
7.1.2 Via control pushbutton panel......................................................................................................................... 11
7.1.3 Via control panel V810/V 820......................................................................................................................... 11
7.2 Adjustment of automatic functions via control panel for stop motor ................................................................... 12
7.2.1 By using stop motor Efka with panel V 810 ................................................................................. .................. 12
7.2.1.1 Adjustment by means of buttons with fixed setting function ........................................................... 12
7.2.1.2 Setting by means of parameters ......................................................................................................... 13
7.2.2 By using stop motor Efka with panel V 820 ................................................................................................... 14
7.2.2.1 Adjustment by means of buttons with fixed setting function ........................................................... 15
7.2.2.2 Setting by means of parameters ......................................................................................................... 15
8. Maintenance ........................................................................................................................................................................ 16
Operating instructions for eventual trouble shooting ....................................................................................................... 17

Foreword
This instruction manual is intended to help the user to become familiar with the machine and take advantage of its application
possibilities in accordance with the recommendations.
The instruction manual contains important information on how to operate the machine securely, properly and economically.
Observation of the instructions eliminates danger, reduces costs for repair and down-times, and increases the reliability and life
of the machine.
The instruction manual is intended to complement existing national accident prevention and environment protection regulations.
The instruction manual must always be available at the machine/sewing unit.
The instruction manual must be read and applied by any person that is authorized to work on the machine/sewing unit. This
means:
- Operation, including equipping, troubleshooting during the work cycle, removing of fabric waste
- Service (maintenance, inspection, repair and/or)
- Transport.
The user also has to assure that only authorized personnel work on the machine.
The user is obliged to check the machine at least once per shift for apparent damages and to immediatly report any changes
(including the performance in service), which impair the safety.
The user company must ensure that the machine is only operated in perfect working order.
Never remove or disable any safety devices.
If safety devices need to be removed for equipping, repairing or maintaining, the safety devices must be remounted directly after
completion of the maintenance and repair work.
Unauthorized modification of the machine rules out liability of the manufacturer for damage resulting from this.
Observe all safety and danger recommendations on the machine/unit! The yellow-and-black striped surfaces designate permanend
danger areas, eg danger of squashing, cutting, shearing or collision.
Besides the recommendations in this instruction manual also observe the general safety and accident prevention regulations!

General safety instructions
The non-observance of the following safety instructions can cause bodily injuries or damages to the machine.
1. The machine must only be commissioned of the instruction book and operated by persons with appropriate training.
2. Before putting into service also read the safety rules and instructions of the motor supplier.
3. The machine must be used only for the purpose intended. Use of the machine without the safety devices is not permitted. Observe
all the relevant safety regulations.
4. When gauge parts are exchanged (e.g. needle, presser foot, needle plate, feed dog and bobbin) when tread-ing, when the workplace
is left, and during service work, the machine must be disconnected from the mains by switching off the master switch or disconnecting
the mains plug.
5. Daily servicing work must be carried out only by appropriately trained persons.
6. Repairs, conversion and special maintenance work must only be carried out by technicians or persons with appropriate training.
7. For service or repair work on pneumatic systems the machine must be disconnected from the compressed air supply system.
Exceptions to this are only adjustments and functions checks made by appropriately trained technicians.
8. Work on the electrical equipment must be carried out only by electricians or appropriately trained persons.
9. Work on parts and systems under electric current is not permitted, except as specified in regulations DIN VDE 0105.
10. Conversion or changes to the machine must be authorized by us and made only in adherence to all safety regulations.
11. For repairs, only replacement parts approved by us must be used.
12. Commissioning of the sewing head is prohibited until such time as the entire sewing unit is found to comply with EC directives.
It is absolutely necessary to respect the safety instructions marked by these signs.
Danger of bodily injuries !
Please note also the general safety instructions.
IMPORTANT WARNING!
To the feeding network cord, it is necessary to connect the respective network plug which has been approved in the country
of utilizing the machine. This operation should be performed by a worker acquainted with the electric safety rules being in
force in the given country. The supplier is not responsible for any damages caused by defective plug or owing to incorrect
assembly of the plug.
In spite of all safety measures made on the machines, inappropriate actions of the operator may lead to dangerous situations. In
industrial sewing machines, attention should be paid to the following still remaining possible sources of injury:
1. Moving sewing needle
- risk of injury when sewing with raised pressure foot or top roller, because the finger guard is then positioned too high.
2. Moving thread take-up lever
- risk of injury when inadvertently or intentionally inserting the finger(s) between the thread take-up lever and its guard.
3. Moving pressure member
- risk of injury when holding sewn work in immediate vicinity of the pressure member and beginning to insert under the pressure
member a considerably thicker sewn work portion,
- risk of injury when sinking the pressure member.
4. When switched off, the clutch motor slows down by inertia but would be reactivated by an accidental tread-ing down of the motor
treadle. To avoid such risk, it is advised to hold the handwheel by hand and slightly to depress the motor treadle.
5. Moving work cutter knife and work guide at the work cutter start
- injury danger at incidental finger insertion under the cutter knife.
6. Moving connecting rod of the work cutter at the work cutter start
- injury danger at incidental finger insertion between the connecting rod and the body of the work cutter.
7. Moving work cutter motor at the work cutter start
- injury danger at incidental finger insertion between the motor and the work cutter guard.

1
Part A - Instruction manual
1. Proper use of the machine
The machine is used in the shoemaking industry for sewing shoe uppers, for sewing on linings with simultaneous lining edge
trimming under the angle of 20° in the manufacture of shoe uppers. In addition to this, the machine serves for assembling
individual shoe parts, as well as for decorative stitching without edge trimming. The machine is suitable for other similar
operations in the fancy goods industry. The machine is able to sewing upper leathers, natural or synthetic leather, eventually in
combination with textile materials. Trimming is always to be done with a sharp knife. The knife is driven by a self-contained motor
and its rear edge is situated 6 mm behind the needle axis. It ensures a good quality trimming of the lining material both in inner
and outer curves. When trimming soft materials, the operator should maintain them, in pulling the trimmed lining behind the
needle, in a stretched condition to make the trimming operation easier.
The machine sews using a double-thread lock stitch. A combined feeding ensures a uniform feeding of all layers to be sewn
together. The machine has got a standard outfit with the 134 KKL needles suitable for sewing leather. For sewing textile materials,
the needle system 134 is being used. In general, only dry material may be sewn, which is not thicker than 6 mm after having been
compressed by the roller presser foot. The material should not contain any hard objects, for the machine is not provided with any
eye protector.
For sewing, textile threads up to the dimension 500 dtex x 1 x 3 (label No 20) are to be used, namely synthetic, cotton or core
spun threads. When needing other special threads, one must take into account the respective risks and proceed to the necessary
safety measures. When sewing very hard or consistent materials or when sewing with edge trimming, the sewing speed must be
considerably reduced below the values given in the technical parameters of the machine.
These special machines may be installed and operated only in dry rooms kept in orderly conditions. When operating them in
rooms which do not meet such conditions, there must be done some additional measures according to the EN 60204-31
standard. In our position of the manufacturers of industrial sewing machines, we start from the assumption that our products are
operated by an at least initiated operator, so that all usual operating activities and their eventual riks can be supposed to be
known.
Machine noisiness
Machine noisiness has been measured in accordance with the standards ISO 3746, ISO 11204 at maximum speed.
Laeq = equivalent machine noise of the self-standing machine on the working place, converted to % machine employment (dB)
- stated in the table
2. Description of the machine
This is a one-needle post-bed sewing machine with a standard vertical hook situated to the right from the needle. The feeding is
of a two-step type with a driven top roller presser foot and with a circular bottom feed combined with a needle feed during the first
step of the workpiece feeding. The main mechanisms are mounted on antifriction bearings, swing shafts and pins are slidingly
mounted. Feeding is derived from the mechanism of changing stitch length through a friction clutch on the bottom feeding shaft.
From here the circular feeder is driven by means of a roller chain. The drive of the roller presser foot is derived from the bottom
feeding shaft through an indented belt on the top feeding shaft through abevel gearing on an articulated vertical shaft. The
needle feeding is derived from the same mechanism as the circular feeding. The stitch length is set using a knob on the web of
the machine arm.
The machine is provided with a thread trimming device, with an electromagnetic roller presser foot lifting, with an electromagnetic
backward stitching. This backward stitching is controlled by a hand lever or by a microswitch in the event of having provided the
machine with an electromagnetic backward stitching. The machine has got a sewing set mounted with changeable needle plate
inserts according to the needle number and according to the distance of trimming from the needle. It i possible to choose the
roller presser foot of 25, 35 or 45 mm. The standard vertical hook has got its own forced bobbin case opening. The hook is
protected by a protective coupling against overload with an adjustable switch-off moment. There is a central pressureless wick
lubricating system. The hook is excluded from this system, it is lubricated separately with its own lubricating regulation. Each
machine has got a built-in hook thread friction winder mounted. The machine can be provided with a halogen lamp lighting,
eventually with further possible outfit. When the machine has no electromagnetic roller presser foot lifting, this lifting is controlled
by the knee lever or, in case of deliveries for the Czech Republic, by the left pedal.
The frame is fitted with a wedge. In accordance with the roller presser foot lifting outfit, the frame is fitted with one or two pedals.
For the edge trimming operation, the machine is provided with an oblique top trimming device. The knife is driven by a leverage
from a separate motor, which is situated on the machine arm. The knife is started by a lever and is automatically shifted into its
working position. With machines provided with the EFKA stop motor, the motor of the trimming device is being switched on only
at the beginning of the sewing operation and it is switched off with an adjustable delay after having ended the sewing operation.
By returning the lever back, the lever movement is stopped and the knife moves upwards, outside from the sewn workpiece.
Together with the machine there is supplied a tiltable material guide. Putting this guide in its working position is mechanically
selectable either separately from the trimming operation or together with the trimming.
Type of the Noisiness % machine
machine dB employment
4182i-XXX-100 82 20
4182i-XXX-200 79 20
4182i-XXX-300 73 20

2
3. Machine sub-classes and sewing categories
3.1 Sub-class
Table 1
*for only Czech republic
3.2 Sewing categories
This code indication includes the equipment assembled on the machine head, both necessary equipment and optional equip-
ment. The standard configuration of the equipment has been preset, according to the under mentioned table, in the factory which
includes only necessary equipment. If the buyer demands a different configuration then the factory allocates a new code
indication.
Table 2
Standard configuration - the numbers in brackets stand for ordering Nos. when ordering separately the Equipment in question
Type Needle size Top roller Wheel feeder Throat plate Throat plate
insert
Class-sub-class Diameter Pitch of teeth Width of hole
-sewing category 0.01mm mm mm mm -
4180i-1XX-100 80 35 0.4 1.2
(S548 134013) (M 173) (M 060) (M 191)
4180i-1XX-200 100 35 0.4 1.5 (M 091)
(S548 134001) (M 173) (M 060) (M 192)
4180i-1XX-300 130 35 0.6 2.0
(S548 000311) (M 173) (M 059) (M 193)
4. Survey of equipment
This survey does not include the equipment assembled on the stand.
4.1 Equipment (at least one of each from the following group of equipment is assembled)
4.1.1 Needles
M 020 - needle 134 LR size 80
M 023 - needle 134 LR size 100
M 021 - needle 134 LR size 130
4.1.2 Wheel feeders
M 060 - wheel feeder with pitch of teeth 0.4 mm
M 059 - wheel feeder with pitch of teeth 0.6 mm
M 058 - wheel feeder with pitch of teeth 1.2 mm
4.1.3 Top roller holders
M 156 - holder for the top roller ø 25 mm
M 157 - holder for the top roller ø 35 mm
M 295 - holder for the top roller ø 45 mm
••••
•
••
••
•
Type of Top roller lift Reverse stitching Thread
the machine trimmer
Class-subclass Via knee Treadle Via electro- Via electro- Via hand Via electro-
-sewing lever mag. + mag. + lever mag. +
category knee lever treadle hand lever
4182i-111-XXX
4182i-121-XXX*
4182i-147-XXX
4182i-157-XXX*
.

3
4.1.4 Top rollers
M 172 - top roller ø 25 mm
M 173 - top roller ø 35 mm
M 174 - rubberized top roller ø 25 mm
M 175 - rubberized top roller ø35 mm
M 310 - smooth top roller ø 25 mm
M 311 - smooth top roller ø 35 mm
M 296 - top roller ø 45 mm - width 2.0 mm
M 297 - top roller ø 45 mm - width 3.8 mm
4.1.5 Sewing set
M 143 - sewing set
4.1.6 Throat plate inserts
M 191 - insert for throat plate (for needle 60-80; trimmed edge 0.8 mm)
M 192 - insert for throat plate (for needle 80-110; trimmed edge 1.2 mm)
M 193 - insert for throat plate (for needle 110-140; trimmed edge 1.5 mm)
M 320 - insert for throat plate (for needle 110-140; trimmed edge 2.4 mm)
M 321 - insert for throat plate (for needle 110-140; trimmed edge 3.0 mm)
M 323 - insert for throat plate (for needle 110-140; trimmed edge 2.0 mm)
4.1.7 Trimmer knives
S425 870237 - trimmer knife A (hard metal)
S080 870235 - trimmer knife A (steel)
S080 870238 - trimmer knife B (steel)
S080 870239 - trimmer knife C (steel)
4.1.8 Gauge for knife setting
M 268 - gauge
4.1.9 Connecting cables of the head to the drive
M 318 - connecting cable to the drive EFKA DC 1600/DA82GA; EFKA VD 552/6F82FA and EFKA VD 554/6F82FA
M 055 - connecting cable without any specified drive (with free cable end)
Note: For the machine provided with a minimotor, the cable is component part of the drive thereof.
4.2 Optional equipment
M 010 - built-in lighting (including transformer 230/12V)
M 269 - jig for knife sharpening
M 242 - setting gauge
4182 111001V - high mortality spare parts kit in plastic box for sub-class without thread trimmer
4182 147001V - high mortality spare parts kit in plastic box for sub-class with thread trimmer
S794 222012 - halogen lighting (12 V, 20 W - contains transformer)
5. Technical data
Table 3a
Sewing Distance Stitch Labelled Number Sewing speed Hook Throat Thickness Play be-
category between the length number of of needle (without trimming) plate of the top tween the
needle axis polyester thread insert material guide and
and the work the knife
trimmer line
mm mm - - 0,01mm 0,01mm SPM SPM - - mm mm
- 100 0,8 3 70 80-60 80 60-80 2500 3500 R 816 M191 0,8-1,2 0,2
- light
-200 1,2 5 40 50-30 100 80-110 2500 3000 R 816 M192 1,2-1,6 0,3
- medium
- 300 1,5 5 20 30-20 130 110-140 1600 2000 R 816 M193 1,6-2,4 0,4
- medium
-heavy
Standard
Maximum
Standard
Range
Standard
Range
Standard
Maximum
Range
Recommended

4
Table 3b
Recommended speed at simultaneous work trimming
To observe: To obtain uniform stitch length, the sewing speed must be reduced. The recommended values apply to current leathers
used in the shoe industry. For extremely soft or extremely hard leathers, tests should be carried out and the sewing speed should
be adjusted accordingly.
The recommended speed has been chosen so as to correspond to the assortment of the available pulleys.
Stitch type Double thread lock-stitch 301
Hook R 816 - standard, vertical
Needle System 134; 134LR; 134 KKLR
Threads max. 500 dtex x 1 x 3
Stitch length max. 5 mm ± 10%
Sewing speed max. 3500 SPM (the maximum sewing speed with the
simultaneous trimming is limited by the stitch length
and by the hardness of the material being trimmed)
Top roller stroke 5,5 ± 0,5 mm - via hand lever
12.5 ± 1 mm via electromagnet
Length of trimmed thread ends 8....11 mm
Height of post bed 173 mm
Opening space of machine head 270 x 298 mm
Weight of the head max. 55 kg (61 kg head with minimotor)
Weitght of the stand max. 60 kg (38 kg for head with minimotor)
Driving unit Clutch motor (min. 0.35 kW)
Stopmotor (min. 0.4 kW)
Dimension of bed plate 178 x 518 mm
Input machine max. 600 W
Trimmed material max. thickness - 2,5 mm
Distance between the needle axis and the work trimmer line 0,8 - 1,5 mm (according to sewing category)
Power output of the work trimmer motor 25 W
Stroke frequency of the work trimmer knife 3500 strokes/min (constant)
Stroke range of the work trimmer knife adjustable to 2,4 mm
Layout dimensions of the machine (including the stand) 1060 x 550 mm
Height of the machine (including the stand) 1680 mm
Stitch length Sewing speed
mm SPM
1,5 2500
2,5 2000
4 1200
5 800
S080 870235 S425 870237 S080 870238 S080 870239
Thickness of
the material trimmed
1 - 4 1,5 - 4 1 - 2 0,2 - 0,8
Minimum radius for the
material being trimmed
~6 ~6 ~4 ~6
Knife stroke
2,4 2,4 1,2 2,4
steel hard meal steel steel

5
6. Operation of the machine
6.1 Threading a thread
Caution! Risk of injury!
Before threading a thread, turn the main switch
off and wait until the machine stops!
Thread the threads as it is shown in picture.
Caution!
Not following the correct method of threading a
thread may cause serious damage to the function
of the machine.
6.2 Bobbin thread winding
- Insert the bobbin (1).
- Spool counter-clockwise manually onto the bobbin, mini-
mum six threads of the lower thread (3).
- Insert the thread ends into the equipment (4) and cut off the
ends.
- Press the lever (2) until it reaches its limit.
- Switch on the machine.
- The winder will automatically switch off after winding.
- Take off the hook bobbin and cut off the end in the equip-
ment (4).
- The nut (5) is instrumental to thread tension control for
winding. Turning clockwise sense the thread tension is in-
creased and the single threads are more firmly fixed on the
bobbin.
- The tension cannot be so extensive as far as slipping of the
winder friction drive has occured.
6.3 Inserting the bobbin and threading the lower
thread
Caution! Risk of injury!
Turn the main switch off and wait until the motor
stops!
- Tilt the shutter (1) up.
- Insert the bobbin (2) with thread end (3) in the direction as
shown in the picture.
- Thread the thread through the notch (4) and the space (5)
and place under the spring (6).
- Cut off the thread end as shown.
1
2
4
3
5
3
2
6
~ 10
5
4
1

6
6.4 Regulating the thread tension
The thread tension must conform to the thickness of the sewn
threads, thickness and hardness of sewn material (thin and
soft material will fold with high tension) and the kind of seam.
An ordinary fitting seam should be formed with stitches knit-
ted in the middle of the sewn material.
A decorative seam is mostly used with rough threads (20) on
thin material and it has tied up threads on the reverse side of
the material for achieving a decorative appearance.
Thread tension adjustment is by standard sewing (par. 5, ta-
ble 3) conditions in accordance with table No. 4.
If achieving of a decorative seam with stitch knitting on the
underside is wished, it is necessary to decrease the upper
thread tension, it is carried out by turning of nuts (1), in the
counter-clockwise sense.
Thread tension
Table 4
Sewing Kind of seam Identified Maximum
category value upper tension of
thread tension lower thread
NN
1- 31
2 - 4.5 1.5
3Fitting 8 2
Decorative 5
If the maximum lower thread tension exceeds the
values given in table No. 4, it may cause problems
in the beginning of sewing after the previous
thread trim.
Measurement of tension is done by dynamometer.
Warning:
The upper thread tensioner has been loosened automatically
after every trimming and top roller lifting. In these cases the
thread tension cannot be measured.
Regulating the thread tension
Caution! Risk of injury!
Before regulating the lower thread tension, turn
the main switch off and wait until the motor stops.
The upper thread tension is adjusted with nuts (1). Its clock-
wise turning increases the tension.
The tension of the auxiliary tensioner (3) should be as low as
possible but it should be on a level so that the upper thread
would not pull out of the tensioner when the work is being
removed.
The lower thread tension is adjusted with a screw (2). Its clock-
wise turning increases the tension.
Tension correlation rate defines the depth of the seam tied
through. The result of raising the upper tension will be the
decreasing depth of tie through. The opposite will apply with
the lower thread.
1
3
2
Fitting seam
Decorative seam
Stitch knitting
Stitch knitting

7
6.5 Needle replacement
Caution! Risk of injury!
Before remowing and inserting the needle turn
the main switch off and wait until the motor
stops!
- Turn with the hand wheel as far as the top needle (1) position
has been reached.
- Loosen the screw (2) and take the needle out.
- When inserting a new needle, care is to be taken that groove
(3) above the needles eye was in the same direction as the
hook.
- Tighten the screw (2).
The inserted needle must respond to the sewing
category according to paragraph No. 5, table 3.
Otherwise it will cause damage to sewing, or even-
tually the machine could be broken.
6.6 Regulation of pressing the top roller
The pressing of the top roller should be as low as possible but
on a level so that the top roller would not fly over when needle
comes off the material and that the feeding power got over
the thread pull by stitch tightening.
By turning of the screw (1) clockwise pressing of the top roller
has been increased, by counter-clockwise turning pressing of
the top roller has been decreased.
6.7 Lifting the top roller up
Mechanical lifting of the top roller is enabled by means of the
hand lever (1), which contemporarily, after it has been lifted in
the arrow direction, is locking the top roller in its top position
and turning (adjustment) of the machine is possible. The top
roller can be lifted via knee lever or left treadle - depending on
the machine sub-class. Automatical lifting by means of elec-
tromagnet is described in the paragraph No. 7.
When lifting top roller via knee lever or the treadle
or electromagnet, the needle must be in the upper
position and the machine has to come to a full
stop.
1
3
2
1
1

8
6.8 Reverse stitching
The change of direction of sewn work can be mechanically
controlled via a reverse stitching lever (1) by its depression in
the arrow direction (down). The sub-class defines whether
the machine has electromagnetic reverse stitching  see para-
graph No. 7.
6.9 Stitch length adjustment
Stitch length adjustment is by dial (2) by its turning. Turning
clockwise stitch length is decreased, turning counter-clock-
wise stitch is length increased.
6.10 Safety clutch
The machine is provided with a safety clutch which disen-
gages the driving unit, when the hook is blocked. Reconnec-
tion must be done in the following way:
Caution! Risk of injury!
Before assembly turn the main switch off and wait
until the motor stops!
- Turn the manually operated wheel as far as you can reach the
suitable point for inserting a screwdriver into the space(1).
- Continue turning the manually operated wheel in direction
of the arrow located on it, until you feel the drop in of the
safety clutch.
6.11 Starting of the material trimming operation
The trimming operation can be started at the beginning of the
seam, but also at any moment during the sewing operation.
In such case, the knife pierces the trimmed material and,
starting from this spot, the trimming operation starts running.
-Put the material to be sewn under the presser foot.
- Engage the trimming device in depressing the engaging
lever (1) downwards. The trimming knife (2) will move
downwards into its working position.
Caution! Risk of injury!
When starting the trimming operation, do not put
your fingers under the trimming knife.
- Sew a seam.
- Disengage the trimming device in pulling the engaging lever
(1) upwards.
Especially when starting the trimming operation
in the middle of the trimmed material, do not ex
ceed its maximum permissible thickness = 2.5 mm.
This may break the trimming knife. When apply
ing the maximum sewing speed together with the maximum
stitch length, a smooth trimming cut cannot be ensured. It is
necessary to reduce one or the other in proceeding to a test
on the material to be trimmed.
1
2
1
1
2

9
6.12 Control of the material guide regardless the
engaged trimming device
-Pull the sphere (1) in the direction of the arrow (A), until its
pin disengages from the engagement with the lever (2).
- In depressing the handrail (3) downwards, lower the guide
(4) into its working position. Using the inverse procedure,
lift the guide upwards.
6.13 Control of the material guide with regard to
the engaged trimming device
-Disengage the trimming device by means of the lever (5) and
lift the guide (4) in its top position
- Depress the sphere (1) in the direction of the arrow (B), until
its pin fits into the recess in the lever (2).
- Engage the trimming device using the lever (5). The guide
shifts in its working position. When disengaging the
trimming device, the guide lifts too.
6.14 Setting of the material guide
Caution! Risk of injury!
Proceed to the guide setting only with the ma-
chine switched off!
-Switch off the machine with the main switch.
- Engage the trimming device (lower the knife in its working
position).
- Loosen the screw (1)
- Loosen the screw (2) until the guide (3)bears against the
insert.
- Using a screw driver, turn the shaft (5) in such a way, so that
the trimming knife is in its lowest position.
- Push the guide in the direction of the arrow (B), until it bears
against the trimming knife, and tighten the screw (1).
- In tightening the screw (2), set the guide (3) in such a way,
so that there is a space between the guide and the throat
plate corresponding to the thickness of the material to be
trimmed.
- Loosen the screw (6) inside the screw (7). Turn the screw
(7) in the suitable direction, until the clearance C = 0.2 -
0.4 mm between the guide and the trimming knife is set - see
table 3a, par. 5.
With an insufficient clerarance C, the knife
strikes against the guide and will be soon de-
stroyed. With an excessive clearance C, the nee-
dle strikes against the guide.
-Tighten the screw ( 6). In this way, the screw (7) will be
blocked.
- The guide (3) may be set in height by means of the screw (2)
even with the main switch switched on.
1
5
3
4
2
A
B
7
6
2
1
3
5
B
C

10
2
1
5
3
4
6
6.15 Replacement of the trimming knife
Caution! Risk of injury!
Replace the trimming knife only with the machine
switched off!
-Switch off the main switch of the machine.
- Put the knife in its top position, loosen the screws (1) and
shift the knife (2) downwards.
- Shift in the new knife, tighten only very slightly the screws
to have the knife in its holder (3) still slidable.
- Place the gauge (4) on the throat plate in such a way, so that
the recess number corresponds with the number on the knife.
- With a slow movement of the lever (5), lower the knife
downwards.
- Using a screw driver, turn the shaft (6) in such a way, so that
the trimming knife is in its lowest position.
- Push the free end of the trimming knife with a screwdriver,
until it bears into the recess in the gauge (4) and tighten
thoroughly the screws (1)
- Lift the trimming knife, remove the gauge, lower the trimming
knife and check the movement of the trimming knife in turning
the shaft (6).
The trimming knife must not strike in its bottom
dead centre against the throat plate insert. In the
top dead centre, the trimming knife must not leave
the cutting edge on the throat plate insert.
6.16 Setting of the trimming device for trimming
very small radii
For trimming very small radii, the trimming knife B is to be
used, it can be additionally purchased. In such case, the
setting inside the trimming mechanism must be changed. This
setting change is described in the service book.
6.17 Setting of the trimming device for trimming
thin, soft materials
For this type of trimming, the trimming knife C is to be used,
it can be additionally purchased. In such case the setting
inside the trimming mechanism must be changed. This setting
change is described in the service book.
6.18 Change of the sewing category
When proceeding to this change, it is necessary to replace the
throat plate insert (it can be additionally purchased). Together
with the insert replacement, the width of the trimmed edge is
changed - the side setting of the knife must be changed. It is
described in the service book.
6.19 Sharpening of the knives
The knives of sintered carbide are to be sharpened using dia-
mond abrasive material. A sharpening jig serving as a knife
fastener for machine sharpening or directly for hand sharpe-
ning on a whetstone (only steel knives) can be additionally
purchased. The sharpening procedure is described in the ser-
vice book.

11
7. Electronic control of the machine
(it is valid for sub-classes equipped with stop motor)
7.1 Control of sewing by means of control elements
7.1.1 Via treadle (treadle positions and function
possibilities)
The position of the treadle is read by the reader, which can
recognise 16 levels. Its meaning is shown on the table.
Treadle Treadle Meaning
position
-2 Foot full backwards Command for thread
trimming (seam finishing)
-1 Foot slightly Commandlifting
the top roller up
0 Neutral position Note
1Slightly forwards Command releasing
top roller
2Continually Sewing at minimum
forwards speed (1. gear)
3Continually Sewing at second
forwards speed level
: : :
13 Fully forwards Sewing at maximum
speed (12. gear)
Note: It is possible to pre-adjust the needle position (up/down)
and foot position (up/down) by stopping in seam (introduc-
ing the treadle in neutral position). Foot position (up/down)
after seam finishing (pressing the treadle by foot fully back-
wards).
7.1.2 Via pushbutton panel
There are four built-in pushbuttons in the panel with fixed
adjustable functions:
T1 - bar operation (by pressing this pushbutton during
sewing the sewn work is feed back)
T2 - needle up/down (each press of the pushbutton changes
the needle position)
T3 - temporary cancelling (recalling) bar (in case) the bar is
pre programmed at the start and end of the seam, by
pressing the pushbutton down will uniformly switch off;
if it is not chosen it will switch on by pressing the push-
button
T4 - revolutions limitation (valid for motor Efka DA82GA)
- reduction of pressure of the presser foot for Mini-stop
EFKA DA320 (see The instructions for assembling with
Mini-stop, par. 5.2.4)
7.1.3 Via control panel Efka V 810/V 820
These functions are standardly assigned to the pushbuttons
A, B:
A - cancelling (recalling) the bar (the same function as T3 of
the pushbutton panel)
B - needle up/down(the same function as T2 of the push-
button panel)
Note: function of the A,B pushbuttons can be changed by
different adjustment of parameters 293,294 (see the parame-
ters list of driving unit Efka DA82GA).
T 1 T 2 T 3 T 4
1 ÷ 13
0
-1
-2

12
7.2 Adjustment of automatic functions via control
panel for stop motor
7.2.1 By using stop motor Efka with panel V 810
Functioning pushbuttons engagement:
Pushbutton P Recalling and program mode termination
Pushbutton E Confirmation of program mode changes
Pushbutton + Increase of value displayed in program
mode
Pushbutton - Decreasing value displayed in program
mode
Pushbutton 1 Start bar SINGLE/DOUBLE/OFF
Pushbutton 2 End bar SINGLE/DOUBLE/OFF
Pushbutton 3 Automatic top roller lifting after stopping
at the seam ON/OFF
Automatic top roller lifting after thread
trimming (end of seam) ON/OFF
Automatic presser foot lifting after
thread trimming (end of seam) ON/OFF
Automatic reduction of pressure of the
presser foot ON/OFF (only for DC 1550/
DA320; see The instructions for assem-
bling with Mini-stop, par. 5.2.4)
Pushbutton 4 Basic position of needle UP/DOWN
Pushbutton A For cancelling respectively recalling
the bar
Pushbutton B For switch over the needle position
UP/DOWN respective shift pushbutton
in program mode
Symbol C Connection of automatic revolutions
Symbol D Connection of lighting barrier
Symbol E The machine is running
Symbol F The revolutions limitation switch on
Symbol G Connection of lower thread controller,
flashing light indicator symbol when
the threads supply on the bobbin is
running out
The arrows on the display indicate switching the functions
which are displayed by symbols above the pushbuttons on.
7.2.1.1 Adjustment by means of buttons with fixed setting
function
Note: It is important to finish the seam in order to reach
effective button pressing (press the treadle fully backwards
down).
Setting start bar:
Drive enables sewing start bar automatically. It is necessary to
choose the type (single, double, off) and number of stitches
which will be sewn forwards and backwards.
The arrow above its symbol shows the type of bar (chosen by
gradually pressing pushbutton 1). It will be displayed
following after pressing pushbutton 1.
Arv (SAv) XXX - number of stitches of start (fancy) bar for-
wards or
Arr (SAr) XXX - number of stitches of start (fancy) bar back-
wards) for about 3 sec.
At this time you can change the number of stitches by gra-
dually pressing the pushbutton + or -.
By setting the treadle to its zero position during the sewing of
the start bar (par. 215 - OFF), you stop the machine at the
completion of the start bar. You can then switch on the sewn
work cutter.
Setting end bar:
The same applies to the start bar (setting by the means of
pushbutton 2).
Erv (SEv) XXX - end (fancy) bar number of stitches forwards
Err (SEr) XXX - end (fancy) bar number of stitches backwards
Note: The last section of end bar must have at least 3 stitches.

13
Foot position adjustment by stopping at the seam (by neutral
position of treadle) and after finishing seam (by neutral posi-
tion of treadle):
Setting is by means of pushbutton 3, arrow indication above
the corresponding symbol.
Needle position adjustment by stopping at the seam:
Setting is by means of pushbutton 4.
7.2.1.2 Setting by means of parameters
Drive memory contains the parameters which enables sewing
system tuning. These parameters have exact meaning and
they are divided into 3 levels. Further parameters which are
available only for operation will be quoted. Each parameter
has its (sequence) number and value.
General procedure by changing parameters of operation level:
- switch the main switch on or finish the seam by pressing the
treadle fully backwards down
- press pushbutton P on the panel V 810
- it will be displayed on the display F 000 (000 it is the number
of parameter)
- by several times pressing + (or -) set the requested number
of parameter
- push pushbutton E down and it will be shown the value of
parameter on the display
- you can change the value by means of pushbutton + or 
- by pushing pushbutton E down you will change the sequence
to the following number of parameter
- by pushing pushbutton P down you will leave the mode of
changing parameters
Note: 1. For permanent memory storing of changed pa-
rameter, it is necessary to press treadle forwards
down after changing of parameters.
2. Mode of changing parameters is possible only af-
ter finishing of the seam.
Number of stitches in bars:
Number of stitches is stored in parameters number.
No. of parameter Value range Description
of parameter of parameters
000(080) 0-254 Number of stitches of
start (fancy) bar forwards
001(081) 0-254 Number of stitches of
start (fancy)bar backwards
002(082) 0-254 Number of stitches of
end (fancy) bar backwards
003(083) 0-254 Number of stitches of
end (fancy)bar forwards
Sewing according to sewing program:
Drive with panel V810 automatically enables sewing of 1 seam
with setting number of stitches. It is necessary to set in corre-
sponding number of stitches, and initialisation of sewing pro-
gram.
No. of parameter Value range Description
of parameter of parameters
007 0-254 Number of stitches
015 ON/OFF ON/OFF sewing under
sewing program

14
ON/OFF thread trimmer:
No. of parameter Value range Description
of parameter of parameters
013 ON/OFF Thread trimmer
ON/OFF
7.2.2 By using stopmotor Efka with panel V 820
Functioning pushbuttons engagement:
Pushbutton P Call and termination of programming mode
Pushbutton E Confirmation when changing programming
mode
Pushbutton + Increasing the value displayed in program-
mingmode
Pushbutton - Reducing the value displayed in program-
ming mode
Pushbutton 1 Start bar SINGLE/DOUBLE/OFF
Pushbutton 2 Stitch counting FORWARD/BACK/OFF
Pushbutton 3 Light barrier function
LIGHT-DARK/DARK-LIGHT/OFF
Pushbutton 4 End bar
SINGLE/DOUBLE/OFF
Pushbutton 5 Function
TRIMMING/TRIMMING+EJECTOR/OFF
Pushbutton 6 Automatic top roller lifting after having
stopped inside the seam ON/OFF
Automatic top roller lifting after trimming
ON/OFF
Automatic presser foot lifting after thread
trimming (end of seam) ON/OFF
Automatic reduction of pressure of the
presser foot ON/OFF (only for DC 1550/
DA320; see The instructions for assem-
bling with Mini-stop, par. 5.2.4)
Pushbutton 7 Basic needle position UP/DOWN
Pushbutton 8 Lower thread waste controlling ON/OFF
Pushbutton 9 Operation pushbutton - programmable
Pushbutton 0 Programming/processing of 40 possible
sewing sections (seams)
Pushbutton A For cancelling or calling the bar
Pushbutton B For switching needle position UP/DOWN,
resp. shifting pushbutton in the program-
ming mode
Symbol C Designating symbol C for code number
Symbol D Designating symbol F for parameter
number
Symbol E Programme number in TEACH IN mode
Symbol F Seam number in TEACH IN mode
Symbol G Run blocking ON
Symbol H Blocked insertion by pushbutton
Symbol I Fault reporting
Symbol J Insertion of stitch number in TEACH IN
mode
Symbol K Connected lower thread controller,
flashing symbol when running out thread
reserve on bobbin
Symbol L Limitation of revolutions ON
Symbol M Right needle disconnected
symbol N Evening stitches for light barriee in the
TEACH IN mode
AB
CD E F GH I JKLMNOPQ

15
Symbol O Machine is running
Symbol P Automatic revolutions ON
Symbol Q Left needle disconnected
The arrows on the display indicate switching the functions
which are displayed by symbols above the pushbuttons on.
7.2.2.1 Adjustment by means of buttons with fixed setting
function
Note: It is important to finish the seam in order to reach
effective button pressing (press the treadle fully backwards
down).
Setting start bar:
Drive enables sewing start bar automatically. It is necessary to
choose the type (single, double, off) and number of stitches
which will be sewn forwards and backwards.
The arrow above its symbol shows the type of bar (chosen by
gradually pressing pushbutton 1). It will be displayed
following after pressing pushbutton 1.
Arv (SAv) XXX - number of stitches of start (fancy) bar for-
wards or
Arr (SAr) XXX - number of stitches of start (fancy) bar back-
wards for about 3 sec.
At this time you can change the number of stitches by gra-
dually pressing the pushbutton + or -.
Setting end bar:
The same applies to the start bar (setting by the means of
pushbutton 4).
Erv (SEv) XXX - end (fancy) bar number of stitches forwards
Err (SEr) XXX - end (fancy) bar number of stitches backwards
Note: The last section of end bar must have at least 3 stitches.
Foot position adjustment by stopping at the seam (by neutral
position of treadle) and after finishing seam (by neutral posi-
tion of treadle):
Setting is by means of pushbutton 6, arrow indication above
the corresponding symbol.
Needle position adjustment by stopping at the seam:
Setting is by means of pushbutton 7.
Trimming switched ON/OFF:
To be set using pushbutton 5.
Sewing programme ON:
To be switched on using pushbutton 0.
Switching ON/OFF the function of the pushbutton F:
The pushbutton F on panel can have assigned one of the
following functions: Sst - softstart
SrS - fancy bar
Frd - reverse angle after trimming
7.2.2.2 Setting by means of parameters
Drive memory contains the parameters which enables sewing
system tuning. These parameters have exact meaning and
they are divided into 3 levels. Further parameters which are
available only for operation will be quoted. Each parameter
has its (sequence) number and value.
General procedure by changing parameters of operation level:
- switch the main switch on or finish the seam by pressing the
treadle fully backwards down
- press pushbutton P on the panel V 820
- on the display there is no data shown
- by depressing the pushbutton E several times, set the
required parameter (without having displayed the parameter
number)
- you can change the value using pushbuttons + or -
- by depressing the pushbutton E you will pass in the given
sequence to the following parameter
- by depressing the pushbutton P down you will leave the
mode of changing parameters
AB
CD E F GHI JKLMNOPQ

16
1
4
2
3
AB
CD E F GHI JKLMNOPQ Note: 1. For permanent memory storing of changed pa-
rameter, it is necessary to press treadle forwards
down after changing of parameters.
2. Mode of changing parameters is possible only af-
ter finishing of the seam.
Number of stitches in bars:
Number of stitches is stored in parameters number.
No. of parameter Value range Description
of parameter of parameters
000(080) 0-254 Number of stitches of
start (fancy) bar forwards
001(081) 0-254 Number of stitches of
start (fancy) bar backwards
002(082) 0-254 Number of stitches of
end (fancy) bar backwards
003(083) 0-254 Number of stitches of
end (fancy) bar forwards
The drive with the panel V 820 enables sewing automatically
up to 40 seams distributed up into eight programmes with the
given stitch numbers and sewing direction (forwards/rear-
wards). For more detailed information see the original driving
instructions.
8. Maintenance
Caution! Risk of injury!
Maintenance work can only be carried out when
the machine is off and the motor stops.
Maintenance work which must be carried out and the intervals
between them and set out in the following table.
Maintenance work Interval
Removing throat plate and its cleaning.
Cleaning of circular feed dog, hook and space
around feeding wheel of material and thread
residues. To clean it, use brush. It is prohibited
to use compressed air for cleaning without 1 day
protective guards preventing injury of persons
with flying impurities.
Hook lubrication - (one drop of oil).
Checking the oil level in the hook
lubrication oil tank. 1 week
Checking the oil level in the oil tanks
of the central distribution. 1 month
Regreasing of the greasing spots
of the trimming system (pins with felt).
For the lubrication of this machine Esso SP-NK 10, DA 10 or
an equivalent quality lubricating oil is recommended (viscossity
at 40° C: 10 mm2/s; flash point: 150°C).
The oil tanks (1, 2, 3) of the central distribution is to be filled
the hole (4) up to the mark max.