Minerva Boskovice 525 User manual

Instruction manual
525
Minerva Boskovice, a.s., Sokolská 60, CZ - 680 17 Boskovice
Tel.: [phone], 453433, 494111 Fax: [phone] http://www.minerva-boskovice.com
Edition : 02/2001 Printed: Czech Republic

Contents - part A - Instruction manual:
1. Proper use of the machine .................................................................................................................................................. 1
2. Description of the machine ................................................................................................................................................. 1
3. Machine subclasses ............................................................................................................................................................ 1
4. Survey of equipment ............................................................................................................................................................ 1
4.1 -for the subclass -101 ............................................................................................................................................... 1
4.1.1 Necessary equipment ..................................................................................................................................... 1
4.1.2 Sewing equipment.......................................................................................................................................... 1
4.1.3 Optional equipment ........................................................................................................................................ 2
4.2 -for the subclass -105 ............................................................................................................................................... 2
4.2.1 Necessary equipment ..................................................................................................................................... 2
4.2.2 Sewing equipment.......................................................................................................................................... 2
4.2.3 Optional equipment ........................................................................................................................................ 2
5. Technical data ..................................................................................................................................................................... 3
Table 2 ........................................................................................................................................................................ 4
6. Operation of the machine .................................................................................................................................................... 5
6.1 Upper thread threading ............................................................................................................................................ 5
6.2 Winding of thread on the hook bobbin ................................................................................................................... 5
6.3 Needle insertion ....................................................................................................................................................... 5
6.4 Adjustment of the upper thread tension ................................................................................................................. 6
6.5 Change of the hook bobbin, threading and setting of the bottom thread tension .............................................. 6
6.6 Adjustment of the stitch length, reverse stitching ................................................................................................. 7
6.7 Adjustment of the pattern width .............................................................................................................................. 7
6.8 Regulation of the presser foot pressure, presser foot lifting ................................................................................ 7
7. Machine maintenance ......................................................................................................................................................... 8
7.1 Cleaning .................................................................................................................................................................... 8
7.2 Lubrication ............................................................................................................................................................... 8
8. Electronic control of the machine ...................................................................................................................................... 9
8.1 Control of sewing by means of control elements ................................................................................................... 9
8.1.1 Via treadle ....................................................................................................................................................... 9
8.1.2 Via pushbutton ............................................................................................................................................... 9
8.1.3 Via control panel Efka V 810/V 820 ................................................................................................................ 9
8.2 Adjustment of automatic functions via control panel for stop motor ................................................................... 10
8.2.1 By using stop motor Efka with panel V 810 ................................................................................................... 10
8.2.1.1 Adjustment by means of buttons with fixed setting function ........................................................... 10
8.2.1.2 Setting by means of parameters ......................................................................................................... 11
8.2.2 By using stop motor Efka with panel V 820 ................................................................................................... 12
8.2.2.1 Adjustment by means of buttons with fixed setting function ........................................................... 13
8.2.2.2 Setting by means of parameters ......................................................................................................... 13
Operating instructions for eventual trouble shooting ....................................................................................................... 15

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.

1
Part A - Instruction manual
1. Proper use of the machine
The machine is designed for decorative (figure) stiching in manufacture of outwear and of ladies´ underwear of elastic materials
(lycra). It can be used for decorative stitching of canvas footwear as well. In general, only dry material may be sewn on these
machines, which should not be thicker than 4 mm when being compressed by the presser foot. The material should not contain
any hard objects, because in such opposite case the sewing operation would be possible only with an eye protector. Such eye
protector is not supplied for the time being. When sewing very hard or compact materials with a thicker needle, the total
thickness thereof is limited. In such case it is also necessary to reduce substantially the sewing speed below the value quoted
in the par. 5. These machines may be installed and operated only in dry and maintained rooms.
As manufacturers of industrial sewing machines we start from the supposition that our machines will be operated at least by a
trained staff, so that all usual operating activities and their eventual risks may be supposed to be known.
Machine noisiness
The noisiness of machines is measured according to ISO 3746, ISO 11204 at the maximum sewing speed.
Laeq = equivalent noise level of the machine itself on the working place converted in % of the machine utilization (dB)  is given
in the following table
2. Description of the machine
Industrial flat-bed sewing machine for figure stitching of patterns formed by one or two needles. It stitches using a two-thread
lockstitch, with two-way drop feed. The stitch length is adjustable by means of a knob mounted on the web of the machine arm.
The backward stitching is controlled by a hand lever, eventually, by pedal or by electromagnet in accordance with the equipment
of the machine. The shape of the stitched pattern is given by an exchangeable cam, always for one pattern  table 2. The presser
foot lifting is controlled by a hand lever, eventually, by pedal, or by a knee lever or by electromagnet in accordance with the
machine equipment.
The machine is provided with a large diameter horizontal hook. It has a 1.8 x greater reserve (volume) of threads than a standard
hook. The lubricating system of the machine is of a group wick-feed type with automatic regreasing of the hook.
3. Machine subclasses
Table 1
4. Survey of equipment
This survey does not include the equipment assembled on the stand (see part B).
4.1 -for the subclass -101
4.1.1 Necessary equipment
S791 995068 Parts of backtacking (with pedal)
S791 642049 Cam for decorative stitching - standard
S791 642037 Adjusting cam  plain stitch
4.1.2 Sewing equipment
S791 124032 35 Sewing equipment 525 E 032 - standard
S791 124033 35 Sewing equipment 525 E 033
S791 124034 35 Sewing equipment 525 E 034
S791 224075 35 Sewing equipment 525 E 075
Type of the Noisiness % machine
machine dB employment
525-101 84 20
525-105 84 20
Machine type Hook Presser foot lifting Backtacking Thread
trimmer
Class-subclass Large Via knee lever Via electro- Via hand Via Via electro-
or pedal magnet lever pedal magnet
525-101
525-105
•
•••
•
••
•optional equipment
standard equipment
•
•

2
4.1.3 Optional equipment
S791 149001 Attachment for serging operation
S791 235002 Unwinding device
S791 224074 Throat plate 811768 (for stitching fine materials)
S791 400023 Guiding for stitching together
S791 630002 Equipment for stitching with two needles
S791 642038 Cam for decorative stitching
S791 642039 Cam for decorative stitching
S791 642040 Cam for decorative stitching
S791 642041 Cam for decorative stitching
S791 642042 Cam for decorative stitching
S791 642043 Cam for decorative stitching
S791 642044 Cam for decorative stitching
S791 642045 Cam for decorative stitching
S791 642046 Cam for decorative stitching
S791 642047 Cam for decorative stitching
S791 642048 Cam for decorative stitching
S791 642050 Cam for decorative stitching
S791 642051 Cam for decorative stitching
S791 642052 Cam for decorative stitching
S791 642053 Cam for decorative stitching
S791 151016 Hinged foot with front thread slit - zig-zag stitch width 6 mm
S791 151017 Hinged foot with front thread slit - zig-zag stitch width 10 mm
S791 947001 Adjustment gauges
S794 222012 Sewing lamp
S741 610118 40 High mortality spare parts kit in a plastics box
4.2 -for the subclass - 105
4.2.1 Necessary equipment
S791 995068 Parts of backtacking (with pedal)
S791 642049 Cam for decorative stitching - standard
S791 642037 Adjusting cam - plain stitch
S980 094051 Connecting cable to drive EFKA DC 1600/DA82GA and EFKA VD 552/6F82FA
4.2.2 Sewing equipment
S791 124032 35 Sewing equipment 525 E 032 - standard
S791 124033 35 Sewing equipment 525 E 033
S791 124034 35 Sewing equipment 525 E 034
S791 224075 35 Sewing equipment 525 E 075
4.2.3 Optional equipment
S791 149001 Equipment for overedging
S791 235002 Unwinding device
S791 224074 Throat plate 811768 (for stitching fine materials)
S791 400023 Guiding for stitching together
S791 630003 Equipment for stitching with two needles
S791 642038 Cam for decorative stitching
S791 642039 Cam for decorative stitching
S791 642040 Cam for decorative stitching
S791 642041 Cam for decorative stitching
S791 642042 Cam for decorative stitching
S791 642043 Cam for decorative stitching
S791 642044 Cam for decorative stitching
S791 642045 Cam for decorative stitching
S791 642046 Cam for decorative stitching
S791 642047 Cam for decorative stitching
S791 642048 Cam for decorative stitching
S791 642050 Cam for decorative stitching
S791 642051 Cam for decorative stitching
S791 642052 Cam for decorative stitching
S791 642053 Cam for decorative stitching
S791 151016 Hinged foot with front thread slit - zig-zag stitch width 6 mm
S791 151017 Hinged foot with front thread slit - zig-zag stitch width 10 mm

3
S791 947001 Adjustment gauges
S794 222012 Sewing lamp
S791 995153 Presser foot lift via electromagnet
S791 995154 Backtacking via electromagnet
S980 094057 Push button for backtacking EFKA DC 1600/DA82GA
S980 094060 Push button for backtacking EFKA VD 552/6F82FA
S741 610518 40 High mortality spare parts kit in a plastics box
5. Technical data
Sewing speed 4400 SPM - maximum
3500 SPM - standard
Stitch type double-thread lockstitch
Stitch length max. 5 mm
Pattern width continuously adjustable - max. 10 mm - according to the
respective accessory (cam) used
Presser foot lifting 5 mm - via hand lever
7 mm - via knee lever, pedal, electromagnet
Hook S980 008250 - horizontal, large diameter
Needle system 134 No. 90-110
Drive clutch motor 2800 RPM (min. 0,35 kW)
stop motor (min. 0,4 kW)
Head weight max. 38 kg
Stand weight 61 kg
Opening space of machine head 265 x 120 mm
Bedplate dimension 178 x 476 mm
Length of trimmed thread ends up to 20 mm
Machine power imput with clutch motor max. 700 W
Machine power imput with stop motor max. 800 W
Equivalent sound pressure level of the machine alone
at the working spot with 20% utilization of the machine
during the working shift at the standard sewing conditions 83 dB/A
Ground plan machine dimensions (including stand) 1060 x 550 mm
Machine height (including stand and thread stand) 1490 mm

4
Table 2
Equipment and their method of use
Trade Ordering No Number Number Pattern width One-needle type Two-needle type
marking of needle of needle
punches/ punches/
1 rev. pattern Max. Pattern Max. Pattern
of came machine machine
Stitch speed speed
length SPM SPM
525 E 002 S791 630002 Equipment for stitching with two needles for the subclass 101 - needle distance 3; 4; 5 mm
525 E 003 S791 630003 Equipment for stitching with two needles for the subclass 105 - needle distance 3; 4; 5 mm
525 E 037 S791 642037 12 - 4400 3800
1,5-5
525 Z 038 S791 642038 12 4 4,5 - 10 4400 3800
1-3
525 Z 039 S791 642039 12 12 4,5 - 10 3800 3400
1-3
525 Z 040 S791 642040 12 6 3,5 - 6 3800 3400
1,5-3
525 Z 041 S791 642041 12 12 4,5 - 10 3800 3800
1,5-5
525 Z 042 S791 642042 12 3 3,5 - 6 3800 3400
1,5-4
525 Z 043 S791 642043 12 4 4 - 6 3800 3400
1-3
525 Z 044 S791 642044 12 6 4 -10 3800 3400
1-3
525 Z 045 S791 642045 12 12 2 - 5 3800 3400
1,5-3
525 Z 046 S791 642046 12 12 2 - 5 3800 3400
1,5-3
525 Z 047 S791 642047 12 2 3,5 - 6 3800 3400
1-3
525 Z 048 S791 642048 12 12 4,5 - 10 3800 3400
1-3
525 Z 049 S791 642049 12 6 4,5 - 10 4400 3800
1-3
525 Z 050 S791 642050 12 4 2 - 6 3800 3400
1-3
525 Z 051 S791 642051 12 6 3,5 - 6 3800 3400
1,5-3
525 Z 052 S791 642052 12 2 2 - 4,5 3800 3400
1-3
525 Z 053 S791 642053 12 2 1 - 2,4 3800 3400
1-3
(
(
(
(
(
(

5
6. Operation of the machine
Caution!
Do not use this sewing machine without using the finger guard
(C, Fig. 4) and without the take-up lever guard (P, Fig. 2).
6.1 Upper thread threading (Fig. 1, 2)
Caution!
Before starting the threading operation, switch off the
main switch and put off the feet from the pedals on the
stand to avoid the starting of the machine by treading
the pedal.
After having inserted the bobbin with thread on the thread stand (N), unwind
the thread in sufficient length and pass it through the holes in the thread stand
(N). Direct it then through the thread guide (A) and through the guide (B) - with
the machines without any thread cutter, or through the auxiliary thread tensioner
(L) with the machines provided with such thread cutter. Feed the thread between
the dishes of the tensioner (C). Direct the thread through the adjusting spring
(D) around the guide (E) and through the guide (F) and (G) into the take-up lever
eye (H). From here the thread is directed downward through the guides (F) and
(J) and through the hole of the thread guide (K) on the needle bar towards the
needle eye. Thread the thread into the needle eye from the front (from the sewer)
rearward.
6.2 Winding of thread on the hook bobbin (Fig. 3)
From the thread stand the thread is directed to the tensioner (A) through the
guide (B) on the machine head. From the guide the thread is directed on the
hook bobbin mounted on the shaft (C) of the winder. Wind up the thread
end several times on the bobbin in the clockwise direction and feed it towards
the spring (D). Introduce the thread between the coils thereof and, when
pulling it slightly, cut it with the knife which is mounted inside the spring.
Engage the winder by means of the lever (E). After having wound up the
thread on the bobbin, the winder stops automatically. After having removed
the bobbin from the winder shaft it is possible to cut the thread with the
knife protected by the spring (D) or to cut it with scissors. The thread (A)
serves for regulating the tension of the thread for winding.
6.3 Needle insertion (Fig. 4)
Caution!
Before starting the operation of the needle change, switch off
the main switch and put the feet off the pedals on the stand to
avoid the machine start by treading the pedal.
After having chosen the correct needle thickness (number) corresponding
to the system of the prescribed type (usually the system 134), loosen the
screw (A) in the needle holder and insert the needle (B) up to the bottom of
the hole in the needle holder. Turn it in such a way, so that its long groove is
directed ahead (towards the sewer).
Caution - when choosing a thicker needle it is necessary to check, whether
the hook beak does not catch the needle - the eventual setting of the hook
position is to be carried out by a qualified person. Check up, whether the
needle passes through the centre of the needle hole, change a faulty needle.
A
B
G
C
E
K
F
J
H
D
Fig. 1
H
A
L
Fig. 2
B
C
A
E
AB
Fig. 4
D
Fig. 3
N
M
OFF ON
MAIN SWITCH
P
C

6
6.4 Adjustment of the upper thread tension
(Fig. 1, 2, 5)
The tension of the upper and that of the bottom thread must be
mutually adjusted in such a way, so that the stitch locking is being
done in the middle of the sewn material (Fig. 5). The tension of the
upper thread is to be adjusted by turning a bit the nut of the tensioner
(M, Fig. 2). In turning the nut to the right (in the clockwise direction),
we increase the tension of the upper thread, in turning it in the
opposite direction, we reduce the tension of the thread.
When the machine is provided with a thread cutter of thread (version
-105), its correct function is to be given major attention in adjusting
correctly the thread tension. It is necessary to set correctly the
auxiliary tensioner (L, Fig. 1) the function of which influences the
length of the upper thread end which is projecting from the needle
eye after having cut the thread. When correctly setting of the tensio-
ner, the quality of the initial stitches is good and no unthreading of
the thread out from the needle occurs. When increasing the adjusted
tension of the auxiliary tensioner this end is shorter (the seam
starts are of better quality), but there is an increased danger that this length will not be sufficient for starting further stitching,
when the thread would leave the needle eye. In the opposite case, namely with a too small tension, the given ends are uselessly
too long which worsens the quality of the stitch start on the rear side of the sewn material.
6.5 Change of the hook bobbin, threading and setting of the bottom thread tension (Fig. 6, 7)
Caution!
Do not start the machine before placing the hook covers in their working (protective) position.
Before changing the bobbin in the hook, switch off the main switch and put your feet off the pedals on the stand to
avoid the machine start by treading the pedal.
Using the flap (F), remove the bobbin case from the hook.
Put the full bobbin (A) into the bobbin case (B) and guide the thread through the groove (C) under the braking spring (D) and then
into the hole (E).
Let free about 5  6 cm of the thread end. It is recommended to turn the bobbin in the arrow direction when pulling the thread.
After having inserted the bobbin case into the hook be sure in assuring this by the flap (F). As usual, by means of the the upper
thread, we thread the bottom thread above the throat plate.
The tension of the bootom thread is regulated by a screw (G). In turning it in the (+) direction, the pulling power increases, in the
(-) direction it is reduced. When the tension of the bottom thread is correctly adjusted, then a good stitch laying is generally being
ensured by the respective adjustment of the upper thread tension by means of the tensioner nut.
Fig. 6
Fig. 5
D
C
+
-
B
A
E
D
C
Fig. 7
F
F
G
Correct adjustment
of the tension of both
threads
Incorrect adjustment
Incorrect adjustment

7
6.6 Adjustment of the stitch length, reverse stitching (Fig. 8, 9)
The stitch length is changed in turning the knob (A), which is placed on the arm web, according to the numbers indicating the
stitch length against the symbol (B) on the machine arm. In turning the knob in the direction of the arrows, the stitch length is
increased (+) or reduced (-).
The direction change of feeding the stitched material is mechanically controlled by the reversible stitch lever (C) in pushing it in
the direction of the arrow (S).
According to the chosen accessory, the machine can be provided with an electromagnetic backtacking control (see Part B, par.
8) or with a control by a backward stitch pedal (P).
Fig. 8b
P
Fig.9
H
G
Fig. 10
+-
E
B
A
-
S
A
C
B
Fig. 8a
+
6.7 Adjustment of the pattern width (Fig. 9)
Caution! Danger of injury!
Switch off the main switch! Before starting the setting operation,
wait until the motor stops!
Before any pattern width change. it is necessary to stop the machine with
the needle in its top position. According to the table 2, mount the cam for
the desired pattern and the pattern width is to be set in such a way, so that
it suits the interval of the respective cam indicated in the table 2. The
pattern width is continuously adjustable. Setting is to be done after having
removed the guard on the machine arm on the lever (E) which controls the
movement of the needlebar holder. Using a key, loosen the nut (G) on the
screw (H), on which the draw bar from the needlebar holder is mounted.
When shifting the screw in the slot of the lever (E) downwards, the pattern
is being narrowed, in shifting it upwards, the stitched pattern is widened.
When setting the maximum width of the patern, check the needle to avoid
its striking into the throat plate. Lock the set up position with the nut (G).
When using the accessory for sewing with two needles, the pattern width
is to be set in such a way, so that the needles pass with sufficient clearance
within the needle groove of the throat plate.
6.8 Regulation of the presser foot pressure,
presser foot lifting (Fig. 10)
The pressure of the presser foot is regulated using an adjusting screw in the
hole (A) which is placed below the top cover of the machine arm and is accessible
from above through the hole in this cover. In turning the adjusting screw in
the direction of the arrows we increase (+) or reduce (-) the pressure of the
presser foot. The pressure of the presser foot must be sufficient for ensuring
a reliable and continuous feeding of the sewn materila with the maximum
sewing speed. A correct adjustment of the pressure of the pressure bar
influences, whether the sewn material is being continuously fed without any
damage and whether the stitch length is uniform.
The mechanical lifting of the presser foot is enabled by means of the hand
lever (B) which when lifted arrests the presser foot in its top position. The
presser foot can be lifted with the knee lever or with the left pedal too -
according to the machine subclass.
The assembling procedure of the automatic presser foot lifting using
electromagnet is described in the part B, par. 7.

8
7. Machine maintenance
Caution!
Before cleaning and lubricating the machine switch off the main switch and put your your feet off the pedals on the
stand to avoid starting the machine by treading the pedal.
7.1 Cleaning
Maintain the machine clean and at least once a day (according to the processed material) remove dirt from the hook and feeder
space by means of a brush, with the machines provided with a thread cutter, from the cutting space as well. Avoid using volatile
liquids for cleaning purposes, they damage the machine and the health too. Check up the filtering sieve on the electric motor for
not being choked with dust.
7.2 Lubrication (Fig. 11, 12, 13)
For lubricating the machine use Esso SP-NK 10 oil or another oil of the same quality (viscosity at 40°C: 10 mm2/s; inflammation
point: 150°C). Before starting the stitching operation, put one oil drop into the holes marked with red colour on the machine
(Fig. 12, 13). Check up specially the oil level on the oil level gauge (1) for lubricating the hook. Refill oil through the hole (2) above
the oil level gauge only when the oil lever considerably sinks below the middle of the oil level gauge.
From time to time, oil is to be dropped into the hole of the hook gearbox (Fig. 13). The quantity of the oil fed for lubricating the
hook is regulated by turning a bit a regulation pin (3) using a screwdriver within the extent of 0 - MAX, that is to the left, in
counterclockwise direction. The pin is placed on the front side of the oil vessel under the bedplate. When setting the indicator
of the regulation pin on 0, the minimum oil feeding to the hook is ensured, so that its seizure is avoided. After having put the
machine into operation, check and refill regularly the oil level in the oil vessel at the hook and in the oil vessel on the machine arm.
It is necessary to refill ESSO BEACON EP2 grease in the shafts of the feeding mechanism (4, 5).
Fig. 13Fig. 12
3
Fig. 11
5
4
12

9
8. Electronic control of the machine
(it is valid for sub-classes equipped with stop motor)
8.1 Control of sewing by means of control elements
8.1.1 Via treadle (treadle positions and function
possibilities) (Fig. 14)
The position of the treadle is read by the reader, which can
recognise 16 levels. Its meaning is shown on the table and
see Fig. 14.
Treadle Treadle Meaning
position
-2 Foot full backwards Command for thread
trimming (seam finishing)
-1 Foot slightly Commandlifting
the foot up
0 Neutral position Note
1Slightly forwards Command releasing
foot
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).
8.1.2 Via pushbutton (Fig. 15)
The pushbutton has got a firmly set function of bar operation
(when depressing the push button during the sewing opera-
tion, the sewn material is being reverse fed).
8.1.3 Via control panel Efka V 810/V 820
(Fig. 16, 17)
These functions are standardly assigned to the pushbuttons
A, B:
A - cancelling (recalling) the bar
B - needle up/down
Note: Function of the A,B pushbuttons can be changed by
different adjustment of parameters 293,294 (see original
operating instruction Efka DA82GA).
1
Fig. 15
Fig. 14
1 ÷ 13
0
-1 -2

10
8.2 Adjustment of automatic functions via control
panel for stop motor
8.2.1 By using stop motor Efka with panel V 810
(Fig 16)
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 foot lifting after stopping at
the seam ON/OFF
Automatic foot lifting after thread trim-
ming (end of seam) ON/OFF
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.
8.2.1.1 Adjustment by means of buttons with fixed setting
function (Fig. 16)
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 follow-
ing 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 2).
Erv (SEv) XXX - end (fancy) bar number of stitches forwards
Err (SEr) XXX - end (fancy) bar number of stitches backwards
Fig. 16

11
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.
8.2.1.2 Setting by means of parameters (Fig. 16)
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

12
AB
CD E F GH I JKLMNOPQ
ON/OFF thread trimmer:
No. of parameter Value range Description
of parameter of parameters
013 ON/OFF Thread trimmer
ON/OFF
8.2.2 By using stop motor Efka with panel V 820
(Fig. 17)
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 foot lifting after having stopped
inside the seam ON/OFF
Automatic foot lifting after trimming ON/
OFF
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, flash-
ing symbol when running out thread re-
serve 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
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.
Fig. 17

13
8.2.2.1 Adjustment by means of buttons with fixed setting
function (Fig. 17)
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 follow-
ing 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 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.
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
8.2.2.2 Setting by means of parameters (Fig. 17)
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

14
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.

15
Operating instructions for eventual trouble shooting
Note: When the machine is driven by a stop motor, it is indispensable to check up, before starting its repair, the setting of its
parameters according to Instructions for assembling, part B, par. 12.5.2.
Trouble
1. Machine runs with difficulty.
2. Machine starts with slow running.
3. Upper thread tearing.
4. Lower thread tearing.
5. Skipping of stitches.
6. Needle breaking.
Cause
1.1 Machine out of use for certain time,
dried oil and dirt in bearings.
2.1 Insufficient tension of the belt from
electic motor.
3.1 Thread guides incised.
3.2 Sharp hook point.
3.3 Bad feeding.
3.4 Incorrect guiding or upper thread
threading.
3.5 Excessive thread tension.
3.6 Needle incorrectly mounted or da-
maged.
3.7 Thread thickness does not anwer
the thickness of sewn material.
3.8 Machine excessively dirty.
3.9 Thread wound up on the hook.
3.10 Thread too thin or insufficiently re-
sistant.
4.1 Incorrect threading of the thread
in the bobbin case.
4.2 Thread too weak or insufficiently
resistant.
4.3 Thread incorrectly wound up on the
hook bobbin.
4.4 Bobbin damaged.
4.5 Sharp pressure spring on the bob-
bin case.
5.1 Needle incorrectly mounted.
5.2 Needle blunt or bent.
5.3 Hook point incised or broken.
5.4 Big needle hole in throat plate.
5.5 Broken adjusting spring for ten-
sioning upper thread.
5.6 Needle bar too high or too low.
5.7 Hook overrun, incorrect timing ad-
justment.
5.8 Dirty hook mechanismus.
6.1 Feeder too high.
6.2 Negligent sewing, pulling of the
material.
Method of troubleshooting
Inject some drops of kerosene into all
oiling holes and on sliding surfaces and
put the machine in quick running to clean
out the oiling holes in the bearings. Lu-
bricate then the machine with oil for sew-
ing machines according to par. 7, part A.
Tension the belt according to par. 5.1.2,
part B.
Check up and replace the guides.
Repair.
Set tension according par. 3; 6; 7, part C.
Thread upper thread according to par.
6.1, part A.
Set tension according par. 6.4, part A.
Replace needle according to par. 6.3,
part A.
Use more suitable thread.
Unscrew throat plate and clean out te
machanism. Remount the throat plate
according to the par. 5, part C.
Remove thread.
Use a more suitable thread.
Thread correctly the thread according to
par.. 6.5, part A.
Use a more suitable thread.
Rewind the bobbin.
Replace bobbin.
Replace spring.
Insert correctly needle according par. 6.3,
part A.
Replace needle accordingd to par. 6.3,
part A.
Replace hook.
Replace throat plate and mount it accord-
ing to par. 5, part C.
Replace spring and set upper thread ten-
sion according to par. 6.4, part A.
Set according to par. 10, part C.
Adjust hook timing according to par. 11,
part C.
Clean out with kerosene and lubricate
with oil.
Set the feeder height according to par. 3,
part C.
Let material pass freely.

16
7. Difficult and uneven machine feed-
ing.
8. Incorrect stitch locking. Threads
locked on the top side of sewn ma-
terial.
9. Incorrect stitch locking. Threads
locked on the bottom side of sewn
material.
10. Hook blocked.
11. Little reserve of upper thread, ma-
chine does not start sewing, upper
thread leaves needle eye at the start
of next sewing.
12. Little reserve of lower thread, ma-
chine does not start sewing.
13. Thread ends untrimming or insuf-
ficiently trimming.
6.3 Needle too thin for thick material.
6.4 Needle incorrectly mounted.
6.5 Throat plate loosened.
6.6 Upper thread tension too high.
7.1 Feeder too low.
7.2 Feeder used.
7.3 Feeder teeth fouled or blunt.
7.4 Insufficient presser foot pressure.
8.1 Incised spring on bobbin case,
lower thread insufficiently braked.
8.2 Lower thread not threaded under
bobbin case spring.
8.3 Lower thread retained under the
bobbin case spring.
8.4 Unequal setting of upper and lower
thread tension.
8.5 Machine feeds too soon.
9.1 Tensioning disks incised by upper
thread.
9.2 Thread does not pass around hook
or is retained by the bobbin case.
9.3 Upper thread not threaded between
the tensioning disks.
9.4 Lower thread retained between the
tensioning disks.
9.5 Unequal setting of upper and lower
thread tension.
10.1 Lower thread wastes retained in
hook.
11.1 Excessive tension of auxiliary ten-
sioner.
11.2 Cam time setting too quick.
11.3 Machine stops before upper dead
center.
11.4 Electromagnet loosening main
tensioner is out of function.
11.5 Incorrect upper thread unwinding.
12.1 Lower thread end drawn into bob-
bin case.
12.2 Excessive winding up speed.
12.3 Excessive lower thread tension.
12.4 Burr on the covering hook sheet.
13.1 Incorrectly set up (little) pressure
of fixed knife.
13.2 Blunt fixed or trimming knife.
Replace needle according to par. 6.3,
part A.
Mount correctly needle according to par.
6.3, part A.
Mount throat plate according to par. 5,
part C.
Set tension according to par. 6.4, part A.
Set the feeder height according par. 3,
part C.
Replace.
Clean or replace feeder.
Increase pressure according to par. 6.8,
part A.
Replace spring.
Rethread thread according to par. 6.5,
part A.
Clean.
Set thread tension according to par. 6.4
and 6.5, part A.
Set feeding according to par. 3; 6; 7,
part C.
Replace disks and set upper thread ten-
sion according to par. 6.4 and 6.5, part A.
Clean hook and set up bobbin case.
Thread correctly the thread according to
par. 6.1, part A.
Clean thread tensioner and set it accord-
ing. 6.4, part A.
Set correctly according to par. 6.4,
part A.
Move hand wheel in spite of conside-
rable resistance in both senses until the
threads in the hook get cut up. After hav-
ing removed them, let run the machine
unthreaded a while and then lubricate the
hook with 2-3 drops of oil recommended
in the par. 7, part A.
Reduce tension according to par. 6.1,
part A.
Delay according to par. 22, part C.
Set according 28, part C.
Find out the cause and repair.
Repair.
Increase lower thread winding up tension
according to par. 6.2, part A.
Maintain maximum number of revolu-
tions 140/min.
Reduce according to par. 6.5, part A.
Polish up.
Set according to par. 27, part C.
Replace or sharpen.