Dake SAR 331 User Manual

USE AND MAINTENANCE MANUAL

SAR 331 SA

GDS

THOMAS

01/2003

THOMAS S.p.A. - Via Pasubio, 32 - 36033 Isola Vicentina (VI) - Telephone 0444 / 97.61.05 - Fax 0444 / 97.69.34

Registro Imprese n. 4272//VI116 REA n. 93906/Vicenza

Contents

SAR 331 SA GDS

Contents..........................................................................." 2

Ordering spare parts........................................................" 2

Guarantee ........................................................................" 2

Machine certification and identification marking............." 3

CHAPTER 1

Reference to accident-prevention regulations .................." 4

1.1 - Advice for the operator ............................................. " 4

1.2 - Location of shields against accidental contact with

the tool....................................................................." 4

1.3 - Electrical equipment according to European

Standard "CENELEC EN 60 204-1"......................." 5

1.4 - Emergencies according to European Standard

"CENELEC EN 60 204-1"......................................." 5

1.5 - Other risks............................................................... " 5

CHAPTER 2

Recommendations and advice for use ....................... " 5

2. 1 - Recommendations and advice for using the machine. " 5

CHAPTER 3

Technical characteristics ............................................. " 6

3.1 - Table of cutting capacity and technical details ......." 6

CHAPTER 4

Machine dimensions - Transport - Installation

Dismantling.................................................................... " 6

4.1 - Machine dimensions .............................................. " 6

4.2 - Transport and handling of the machine ................." 7

4.3 - Minimum requirements for the premises

housing the machine .............................................. " 7

4.4 - Anchorage of standard machine............................ " 7

4.5 - Instructions for electrical connection...................... " 7

4.6 - Instructions for assembly of the loose parts and

accessories ............................................................. " 7

4.7 - Disactivating the machine ...................................... " 7

4.8 - Dismantling ............................................................. " 7

CHAPTER 5

Machine functional parts.................................................." 7

5.1 - Operating head or saw frame .................................... " 7

5.2 - Vice.......................................................................... " 7

5.3 - B e d .......................................................................... " 7

CHAPTER 6

Description of the operating cycle ...................................." 8

6.1 - Starting up and cutting cycle ....................................." 8

CHAPTER 7

Regulating the machine ................................................ " 10

7.1 - Blade tension assembly ......................................... “ 10

7.2 - Blade guide blocks ................................................. “ 1 0

7.3 - Vice ......................................................................... “ 10

7.4 - Regulating the cutting angle .................................. “ 1 1

7.5 - Blade-cleaning brush ............................................. “ 11

7.6 - Regulating the height of the cut .............................“ 11

7.7 - Regulating the cutting speed ................................. " 11

7.8 - Regulating the saw frame return spring................." 12

7.9 - Changing the blade ................................................ " 1 2

7.10- Replacing saw frame return spring ........................ " 12

CHAPTER 8

Routine and special maintenance ............................... " 12

8.1 - Daily maintenance ................................................. " 1 2

8.2 - Weekly maintenance .............................................. " 12

8.3 - Monthly maintenance ............................................. " 13

8.4 - Six-monthly maintenance ....................................... " 1 3

8.5 - Oils for lubricating coolant......................................" 1 3

8.6 -Oil disposal..............................................................." 13

8.7 - Special maintenance .............................................. " 13

CHAPTER 9

Material classification and choice of tool.................... " 14

9.1 - Definition of materials ............................................. " 14

9.2 - Selecting blade ....................................................... " 14

9.3 - Teeth pitch .............................................................. " 14

9.4 - Cutting and advance speed ..................................." 1 5

9.5 - Blade running-in ..................................................... " 15

9.6 - Blade structure ....................................................... " 1 5

9.7 - Blade type ............................................................... " 15

Tooth shape and angle ........................................... " 1 5

Set ........................................................................... " 16

9.7.1 - Table of recommended cutting parameters .............. " 16

CHAPTER 10

Machine components ................................................... " 17

10.1- List of spare parts ..................................................." 1 7

CHAPTER 11

Wiring diagrams ..............................................................." 22

Schema elettrico idraulico ................................................" 24

CHAPTER 12

Troubleshooting ................................................................ " 2 5

12.1-Blade and cutting diagnosis ....................................... " 25

12.2-Electrical components diagnosis................................ " 29

CHAPTER 13

Noise tests ....................................................................... " 2 9

Plates and labels .............................................................." 30

Ordering spare parts

- When ordering spare parts you must state:
MACHINE MODEL
SERIAL NUMBER
PART REFERENCE NUMBER

Without these references WE WILL NOT SUPPLY the spares. See point 10.1 - list of spare parts -

Guarantee

- The Company guarantees that the machine to which this manual refers has been designed and built to comply with safety regulations and
that it has been tested for functionality in the factory.

- The machine is guaranteed for 12 months: the guarantee does not cover the electric motors, electric components, pneumatic components
or any damage due to dropping or to bad machine management, the failure to observe maintenance standards or bad handling by the
operator.

- The buyer has only the right to replacement of the faulty parts, while transport and packing costs are at his expense.

- The serial number on the machine is a primary reference for the guarantee, for after-sales assistance and for identifying the machine for any
necessity.

2

Machine certification and identification marking

MACHINE LABEL

via Pasubio, 32 36033 ISOLA VIC. - ITALIA

SAR 331 SA GDS

MODEL

TYP
SERIAL NUMBER
YEAR OF MANUFACTURE

SAR

331 SA GDS

(Space reserved for the NAME and STAMP of the DEALER and/or IMPORTER)

3

SAR 331 SA GDS

REFERENCE TO ACCIDENT - PREVENTION REGULATIONS

1

This machine has been built to comply with the national and community accident-prevention regulations in force. Improper use
and/or tampering with the safety devices will relieve the manufacturer of all responsibility.

1.1 - Advice for the operator

- Check that the voltage indicated on the plate, normally fixed to the machine motor, is the same as the line voltage.

- Check the efficiency of your electric supply and earthing system; connect the power cable of the machine to the socket and the earth
lead yellow-green in colour) to the earthing system.

- When the saw frame is in suspend mode (up) the toothed blade must not move.

- Only the blade section used for cutting must be kept unprotected. Remove guarding by operating on the adjustable head.

- It is forbidden to work on the machine without its shields (these are all blue or grey in colour).

- Do not use any artful system or device (for ex. shim) to prevent the vice from locking the workpiece. Do not hold the workpiece with
your hand during the cutting process.

- Do not charge the workpiece from the right to the left-hand side with respect of the machine front.

- Always disconnect the machine from the power socket before blade change or carrying out any maintenance job, even in the case
of abnormal machine operation.

- Always wear suitable eye protection.

- Never put your hands or arms into the cutting area while the machine is operating.

- Do not wear loose clothing with sleeves that are too long, gloves that are too big, bracelets, chains or any other object that could get
caught in the machine during operation; tie back long hair.

- Keep the area free of equipment, tools or any other object.

- Perform only one operation at a time and never have several objects in your hands at the same time. Keep your hands as clean as
possible.

- All internal and/or internal operations, maintenance or repairs, must be performed in a well-lit area or where there is sufficient light
from extra sources so as to avoid the risk of even slight accidents.

1.2 - Location of shields against accidental contact with the tool

- Blue or grey metal shield fixed frontally with screws to the fixed blade-guiding block (Ref. A).

- Blue or grey shield fixed with screws to the adjustable blade-guiding block. Guarantees that the section of blade which exceeds the
piece to be cut is covered (Ref. B).

- Grey metal casing fixed with hooks to the frame. Protects the flywheels from blade dragging (Ref. C).

AB

C C

4

SAR 331 SA GDS

1.3 - Electrical equipment according to European Standard "CENELEC EN 60 204-1" which assimilates,

with some integrating modifications, the publication "IEC 204-1"

- The electrical equipment ensures protection against electric shock as a result of direct or indirect contact. The active parts of this
equipment are housed in a box to which access is limited by screws that can only be removed with a special tool; the parts are fed
with alternating current at low voltage (24 V). The equipment is protected against splashes of water and dust.

- Protection of the system against short circuits is ensured by means of rapid fuses and earthing; in the event of motor overload,
protection is provided by a thermal relay.

- In the event of a power cut, the specific start-up button must be reset.

- The machine has been tested in conformity with point 20 of EN 60204.

1.4 - Emergencies according to European Standard "CENELEC EN 60 204-1"

- In the event of incorrect operation or of danger conditions, the machine may be stopped immediately by pressing the red mushroom
button.

- The casual or voluntary removal of the protection shield of the flywheels causes the stepping-in of a microswitch that automatically
stops all machine functions.

- In case blade breaks, the band tightening microswitch/pressure switch disconnects all machine.

NOTE:Resetting of machine operation after each emergency stop is achieved by reactivating the specific restart button.

1.5 - OTHER RISKS

- As the machine is running, any intervention from the operator within the “dangerous zone” or cutting area must be considered a risk
for his own safety.

RECOMMENDATIONS AND ADVICE FOR USE

2

2.1 - Recommendations and advice for using the machine

- The machine has been designed to cut metal building materials, with different shapes and profiles, used in workshops, turner’s
shops and general mechanical structural work.

- Only one operator is needed to use the machine, that must stand as shown in the picture.

Before starting each cutting operation, ensure that the part is firmly gripped in the vice and that the end is suitably supported.
These figures show examples of suitable clamping of different section bars, bearing in mind the cutting capacities of the machine in
order to achieve a good efficiency and blade durability.

- Do not use blades of a different size from those stated in the machine specifications.

- If the blade gets stuck in the cut, release the running button immediately, switch off the machine , open the vice slowly, remo v e the part
and check that the blade or its teeth are not broken. If they are broken, change the tool.

- Check saw frame return spring to ensure proper balancing.

- Before carrying out any repairs on the machine, consult the dealer or apply to THOMAS.

5

SAR 331 SA GDS

TECHNICAL

3

CHARACTERISTICS

3.1 - Table of cutting capacity and technical details

CAP ACITA` DI

TAGLIO

0°

45° DX
45° SX

60°

330 330x330 480x130
310 280x28 0 300x25 0

300 250x25 0 280x25 0
200 180 x180 180 x200

MACHINE DIMENSIONS
TRANSPORT

4

INSTALLATION
DISMANTLING

4.1 - Machine dimensions

2050

Blade motor
Hydraulic motor
Pump electric

flywheel diameter

Blade dimensions

Cutting speed
Vice opening

Saw frame inclination
Height of pieces bearing sur face
Machine weight

KW
KW
KW
mm
mm

m/1'

mm

°

mm

Kg

2150

1.5

0.37

0.18
390

3810x27x0.9

21 ÷ 116

485

25
740
720

1600

6

SAR 331 SA GDS

4.2 - Transport and handling of the machine

If the machine has to be shifted in its own packing, use a fork-lift
truck or sling it with straps as illustrated.

4.3 - Minimum requirements for the premises
housing the machine

- Mains voltage and frequency complying with the machine motor
characteristics.

- Environment temperature from -10 °C to +50 °C.

- Relative humidity not over 90%.

- Position the machine on a firm cement floor, maintaining, at the
rear, a minimum distance of 1000 mm from the wall; anchor it to
the ground as shown in the diagram, using screws and expansion
plugs or tie rods sunk in cement, ensuring that it is sitting level.

4.5 - Instructions for electrical connection

- The machine is not provided with an electric plug, so the customer
must fit a suitable one for his own working conditions:

1 - WIRING DIAGRAM FOR 4-WIRE SYSTEM FOR THREE-

PHASE MACHINE - SOCKET FOR A 16A PLUG

R = L1
S = L2
T = L3
PE = GND

4.6 - Instructions for assembly of the loose parts and

accessories

Fit the components supplied as indicated in the photo:

- Mount the stock stop.

- Mount the coolant liquid holder.

4.7 - Disactivating the machine

4.4 - Anchorage of standard machine

INGOMBRO OPERATIVO = mm 2100

INGOMBRO OPERATIVO = mm 2300

- If the sawing machine is to be out of use for a long period, it is
advisable to proceed as follows:

1) detach the plug from the electric supply panel

2) loosen blade

3)release the arch return spring

4) empty the coolant tank

5) carefully clean and grease the machine

6) if necessary, cover the machine.

4.8 - Dismantling

(because of deterioration and/or obsolescence)

General rules

If the machine is to be permanently demolished and/or scrapped,
divide the material to be disposed of according to type and composi­tion, as follows:

1) Cast iron or ferrous materials, composed of

ondary raw materials, so they may be taken to an iron foundry
for re-smelting after having removed the contents (classified in
point 3);

2) electrical components, including the cable and electronic ma-terial

(magnetic cards, etc.), fall within the category of material classi­fied as being assimilable to urban waste according to the laws of
the European community, so they may be set aside for collection
by the public waste disposal service;

3) old mineral and synthetic and/or mixed oils, emulsified oils and

greases are special refuse, so they must be collected, transported
and subsequently disposed of by the old oil disposal service.

metal alone, are sec-

7

SAR 331 SA GDS

NOTE:since standards and legislation concerning refuse in gen-

eral is in a state of continuous evolution and therefore
subject to changes and variations, the user must keep
informed of the regulations in force at the time of disposing
of the machine tool, as these may differ from those
described above, which are to be considered as a general
guide line.

MACHINE FUNCTIONAL

5

PARTS

5.1 - Operating head or saw frame

- Machine part consisting of the members that transfer the motion
(gearmotor, flywheels), the tightening/guiding (blade guide arms,
blade tightening slide) and the tool lowering control.

5.3 - Bed

- Structure supporting the HEAD OR SAW FRAME, the VICE, the
SWIVEL DEVICE with relative locking system, the ELECTRICALS,
the BAR STOP and housing the coolant TANK for cut and pump.

5.2 - Vice

- Manual locking system for cutting material using the hand wheel.

This device allows for the quick shifting of the vice and the possibility
to cut inclinations to the left and right.

DESCRIPTION OF THE

6

OPERATING CYCLE

Before operating, all the main organs of the machine must
be set in optimum conditions (see the chapter on “Regulat-

ing the machine”).

6.1 - Getting started

DESCRIPTION OF THE CUTTING CYCLE:

- Manual closing of the vice;

- Activation of the cutting cycle;

- Independent lowering of the blade-carrying
frame;

- Frame raising (with selector);

- Manual opening of the vice.

PRELIMINARY OPERATIONS:

- Make sure that the machine is equipped with all the protec­tions described in paragraph 1.2 of chapter 1.

- Position the side draining system (supplied with the machine)
on the base.

- Make sure that the machine is not in an emergency stop. If it
is, release the red mushroom pushbutton (1) on the com­mand panel.

- Rotate the belt-tightening handwheel (8) until the relative
microswitch activates.

- Rotate the main switch (2) to position 1.

- Press the pushbutton with light (4) and make sure that the
relative indicator lights up.

- Use the selector (5) to raise the frame.
NB: invert the electric supply phases if the frame does not rise
(this should only be done during installation).

8

SAR 331 SA GDS

- Open the vice according to the dimensions of the material to
be cut.

- Place the material to be cut in the vice and lock using the
handwheel. Make sure that the relative pawl is interlocked
with the rack.

- Free the hand le v er and move the mobile belt-guiding arm as
close as possible to the piece to be cut (up to approx. 10mm)
then lock the hand lever.

- Make sure that the cutting angle corresponds to the desired
inclination and that the angling device is locked using the
relative lever (see paragraph 7.4 of chapter 7).

- Make sure that the hydraulic regulator (6) is fully closed, then
rotate counter clockwise to set the most suitable lowering
speed for the characteristics of the material to be cut. It is
advisable to always start from a cautionary speed and in­crease subsequently if necessary.

2

3

4

SAR

START

1

- Always make sure that the vice is positioned at the extreme
right or left of the countervice to avoid accidental contact with
the frame.

- Before starting the cutting cycle it is advisable to move the
blade to approx. 10mm from the piece to be cut, using the
selector (5) if necessary.

- Press the pushbutton (3) to start the cutting cycle. Make sure
that the belt turns in the correct direction and that a sufficient
quantity of cooling liquid exits.
NB: The weight of the blade-carrying frame causes it to lower
automatically without needing the intervention of Operator. If
greater cutting pressure is necessary, modify the tightness of
the frame return spring (see paragraph 7.8 of chapter 7).

- Use the variator group handwheel to set the most suitable
cutting speed for the material to be cut. This operation must
always be carried out while the motor is running).
To set the necessary speed, refer to the plate applied on­board the machine or shown below.

- Press the emergency pushbutton if incorrect manoeuvres are
made, or if the cutting cycle is to be stopped.

- When finished cutting, the frame stops in the lower position.
Use the selector (5) to raise the frame.

NB: Do not use the sawing machine at full material dis­charge speed during the first 50 working hours.

Keep a safe distance from the cutting area during machine
operation.

5

1

6

CUTTING DIRECTION

The sawing machine is now ready to start working. Please
remember that the CUTTING SPEED and the TYPE of blade
when combined with suitable frame lowering have a determi­nate effect on the cutting quality and machine return (for more
information on this topic, refer to the "Material classification
and blade choice" chapter)

- When starting to cut with a new blade, it is necessary to

exert a light pressure on the piece during the first two or
three cuts, in order to use a cutting time that is almost
double the normal one (refer to the

graph in the "Material classification and blade choice" chap­ter further on in this manual).

- Use the red emergency pushbutton (1) when dangerous con­ditions or faults in general arise. Doing so immediately inter­rupts machine operation.

Blade breaking-in

para-

8

9

REGULATING

7

THE MACHINE

7.1 - Blade tension assembly

SAR 331 SA GDS

4

The ideal blade tension is obtained by turning the belt-tighten­ing handwheel until the relative microswitch activates (B).
The position of the microswitch is established by an instru­ment that measures the blade stretch. This regulation m ust not
be modified.
NB: it is advisable to loosen the blade tension when the saw is not
being used.
It is advisable to always use blades having the dimensions declared
in this manual.

B

7.2 - Blade-guiding arms and plates

The blade is guided by plates that are regulated during the
testing phase according to the thickness of the blade. The mini­mum clearance indicated in the figures should be maintained.
When the blade is to be replaced, make sure to always fit belts
with a 0.9 mm thickness because the blade-guiding plates have
been regulated for this thickness. If using toothed belts with
different thicknesses a new regulation must be carried out as
follows:

- Loosen the screw (1) and unscrew the grub screws (2), wid­ening the space between the plates.

- Loosen the nuts (3) and the grub screws (4) and rotate the
pins (5 - 6) to widen the space between the bearings (7).

- Insert the new blade, then place the plate (8) against it. Tighten
the grub screws (2), leaving a 0.04 mm clearance to ensure
that the toothed belt slides well. After this, tighten the relative
nuts and the screw (1).

- Rotate the pins (5 - 6) until the bearings lean against the
blade, as indicated in the figure. Lock the grub screws (4) and
the nuts (3).

6

7

3

22

1

5

8

0,04

7.3 - Vice

- The vice can be made to move rapidly towards the piece to be
cut by keeping the hand lever (C) raised and moving the vice
manually. Before using the handwheel to lock the material to
be cut, make sure that the hand lever is interlocked with the
rack.

- The vice group can be positioned to the right or left of the
blade. If positioning is not fully completed, the sawing ma­chine can be permanently damaged by the lowering move­ment of the frame.

- Always keep the vice guide and relative thread clean and
oiled.

10

C

SAR 331 SA GDS

7.4 - Regulating the cutting angle

- Raise the frame to a position that avoids contact with the piece
supporting surface and the material to be cut.

- Push the lever (D) to the left in order to free the rotation device.

- Rotate the frame group to the necessary angle, referring to
the graduated sector.

- Use the mechanical stops on the machine base to make posi­tioning at 45° / 60° easier. If necessary , rotate the mechanical
stops to permit movement of the rotating arm.

- When finished, push the lever (D) to the right in order to lock
the rotation device.

7.7 - Regulating the cutting speed

The cutting speed should only be regulated while the belt rota­tion motor is running.
Use the relative handwheel and refer to the relative plate in
order to set the necessary speed.

D

7.5 - Blade-cleaning brush

This is an excellent accessory for cleaning the blade during the
cutting cycle. Periodically check brush integrity and if neces­sary regulate further to guarantee perfect blade cleaning.

7.6 - Regulating the cutting height

With this accessory it is possible to raise the frame and/or
move it closer to the piece to be cut.

- Use the selector (E) to move the frame to the necessary posi-

tion.

- It is advisable to position the blade at a distance of 10mm from

the material to be cut.

- To permit the frame lowering movement, open the hydraulic

regulator on the command panel.

SAR

2

1

START

POS. N° m/min .

021

123,5
226
328,5
431
533,5
636
738,5
841
943,5

10 46
11 48,5
12 51
13 53,5
14 56
15 58,5
16 61
17 62,5
18 64,5

POS. N° m/mi n .

19 66
20 68
21 71, 5
22 74, 5
23 78
24 81, 5
25 85
26 87, 5
27 90
28 93
29 96
30 99
31 102,5
32 1 05,5
33 1 08,5
34 111
35 1 13,5
36 116

E

11

SAR 331 SA GDS

7.8 - Regulating the frame raising spring

- It is possible to modify the tension of the frame return spring in
order to obtain increased cutting pressure while lowering to
cut.

- Loosen the nut (F) to remove tension from the spring until the
desired tension has been reached.

- NB: the spring tension should not be loosened in an exagger­ated manner. Doing so can influence the balance of the b lade­carrying frame.

F

7.10 – Replacement of the return spring arch

- During the entire operation, it will be necessary to keep the
arch lifted and secured.

- First loosen the tension spring and unhook it from the
supporting spring immediately behind.

PROBABLE REPLACEMENT OF OTHER PARTS –
REDUCTION GEAR OR SPEED CONTROL, MOTOR PUMP
AND ELECTRICAL COMPONENTS – TO BE EXECUTED BY
SPECIALISED AND COMPETENT PERSONNEL.

ROUTINE
AND SPECIAL

8

MAINTENANCE

BEFORE PERFORMING THE FOLLOWING OPERA TIONS, THE
ELECTRIC POWER SUPPLY AND THE PO WER CABLE MUST
BE COMPLETELY DISCONNECTED.

7.9 – Replacing the blade

- Raise the frame to the high position.

- Use the handwheel to loosen the blade, remove the mobile
blade-guiding shield and the belt-cleaning brush shield.

- Open first the rear then the front flywheel casing and extract
the old blade from the flywheels and the blade-guiding blocks.

- Position the new blade, placing it firstly among the plates and then
on the flywheel seats. Make sure that the teeth are positioned in the
correct direction for cutting (see drawing below).

- Tighten the blade, making sure it adapts perfectly to the fly­wheel seats.

- Reposition the mobile blade-guiding shield, the belt-cleaning
brush shield and close the flywheel casings. Make sure that
the safety microswitch activates, otherwise the machine will
not start when powered again.

WARNING: alwa ys use blades having the dimensions speci­fied in this manual and for which the blade guide heads
have been set: otherwise, see chapter on "Description of

the operating cycle" in the Starting-up section.

CUTTING DIRECTION

THE MAINTENANCE JOBS ARE LISTED BELOW, DIVIDED INTO
DAILY, WEEKLY, MONTHLY AND SIX-MONTHLY INTERVALS. IF
THE FOLLOWING OPERATIONS ARE NEGLECTED, THE RESULT
WILL BE PREMATURE WEAR OF THE MACHINE AND POOR
PERFORMANCE.

8.1 - Daily maintenance

- General cleaning of the machine to remove accumulated shavings.

- Clean the lubricating coolant drain hole to avoid excess fluid.

- Top up the level of lubricating coolant.

- Check blade for wear.

- Rise of saw frame to top position and partial slackening of the
blade to avoid useless yield stress.

- Check functionality of the shields and emergency stops.

8.2 - Weekly maintenance

- More accurate general cleaning of the machine to remove shav­ings, especially from the lubricant fluid tank.

- Removal of pump from its housing, cleaning of the suction filter
and suction zone.

- Clean the filter of the pump suction head and the suction
area.

- Cleaning with compressed air of blade guide arms (guide
bearings, pads and drain hole of the lubricating cooling).

- Cleaning flywheel housings and blade sliding surfaces on
flywheels.

- Check condition of the blade cleaning brushes.

- Greasing of motor flywheel bearings.

12

8.3 - Monthly maintenance

- Check the tightening of the motor flywheel screws.

- Check that the blade guide bearings on arms are perfect running
condition.

- Check the tightening of the screws of the gearmotor, pump and
accident protection guarding.

8.4 - Six-monthly maintenance

REDUCER:

- It is advisable to carry out the first oil change after around 300
working hours. Wash the internal parts accurately. Use syn­thetic lubricant of the SHELL TIVELA OIL SC 320 type or simi­lar.

- The next oil change should be carried out after approx. 2000
working hours.
VARIATOR:

- Replace the variator oil after approx. 2000 working hours. Use
SHELL DONAX TA oil or similar.

- NB: never mix synthetic oil with mineral oil.

SAR 331 SA GDS

- Completely replace the hydraulic switchboard oil at least once
every year. Use SHELL HYDRAULIC OIL 32 or similar.

- Carry out a continuity test on the unipotential protection cir­cuit.

8.5 - Oils for lubricating coolant

Considering the vast range of products on the market, the user
can choose the one most suited to his own requirements, using
as a reference the SHELL LUTEM OIL ECO type.
THE MINIMUM PERCENTAGE OF OIL DILUTED IN WATER IS
8 - 10 %.

8.6 - Oil disposal

The disposal of these products is controlled by strict regula­tions. Please see the Chapter on “Machine dimensions - T rans-
port - Installation” in the section on

Dismantling

.

8.7 - Special maintenance

Special maintenance operations must be carried out by skilled
personnel.
However, we advise contacting THOMAS or their dealer and/or
importer. Adjusting the protective and safety equipment and
devices, the reducer, the motor, the motor pump and electric
components are classed as special maintenance operations.

13

SAR 331 SA GDS

MATERIAL
CLASSIFICATION AND

9

CHOICE OF TOOL

Since the aim is to obtain excellent cutting quality, the various
parameters such as hardness of the material, shape and thick-

ness, transverse cutting section of the part to be cut, selec-
tion of the type of cutting blade, cutting speed and control of
saw frame lowering.These specifications must therefore be har-

moniously combined in a single operating condition according to
practical considerations and common sense, so as to achieve
an optimum condition that does not require countless opera­tions to prepare the machine when there are many variations in
the job to be performed.The various problems that crop up from
time to time will be solved more easily if the operator has a good
knoledge of these specifications.
WE THEREFORE RECOMMEND YOU TO ALWAYS USE
GENUINE SP ARE BLADES THAT GUARANTEE SUPERIOR
QUALITY AND PERFORMANCE.

9.1 - Definition of materials

The table at the foot of the page lists the characteristics of the ma­terials to be cut, so as to choose the right tool to use.

9.2 - Selecting blade

be cut, according to these criteria:

- parts with a thin and/or variable section such as profiles, pipes
and plate, need close toothing, so that the number of teeth used
simultaneously in cutting is from 3 to 6;

- parts with large transverse sections and solid sections need widely
spaced toothing to allow for the greater volume of the shavings
and better tooth penetration;

- parts made of soft material or plastic (light alloys, mild bronze,
teflon, wood, etc.) also require widely spaced toothing;

- pieces cut in bundles require combo tooth design.

9.3 - Teeth pitch

As already stated, this depends on the following factors:

- hardness of the material

- dimensions of the section

- thickness of the wall.

BLADE TEETH SELECTION TABLE

THICKNESS MM

TILL 1.5 14 10/14
FROM 1 TO 2 8 8/12
FROM 2 TO 3 6 6/10
FROM 3 TO 5 6 5/8
FROM 4 TO 6 6 4/6

MORE THAN 6 4 4/6

Z CONTINUOUS

TOOTH DESIGN

Z COMBO

TOOTH DESIGN

First of all the pitch of the teeth must be chosen, in the other words,
the number of teeth per inch (25,4 mm) suitable for thematerial to

TYPES OF STEEL CHARACTERISTICS

USE

Construction

steels

Carbon

steels

Spring

steels

Alloyed steels for

hardening and

tempering and for

nitriding

Alloyed

casehardening

steels

Alloyed for

bearings

Tool steel

Stainless

steels

Copper alloys
Special brass

Bronze

Cast iron

I

UNI

Fe360
Fe430
Fe510

C20
C40
C50
C60

50CrV4

60SiCr8

35CrMo4
39NiCrMo4
41CrAlMo7

18NiCrMo7
20NiCrMo2

100Cr6 100Cr6 100C6 534 A 99 52100 207 95 690÷980

52NiCrMoKU

C100KU

X210Cr13KU

58SiMo8KU

X12Cr13
X5CrNi1810
X8CrNi1910

X8CrNiMo1713

Aluminium copper alloy G-CuAl11Fe4Ni4 UNI 5275
Special manganese/silicon brass G-CuZn36Si1Pb1 UNI5038
Manganese bronze SAE43 - SAE430
Phosphor bronze G-CuSn12 UNI 7013/2a

Gray pig iron G25
Spheroidal graphite cast iron GS600
Malleable cast iron W40-05

56NiCrMoV7C100K

D

DIN

St37
St44

St52
CK20
CK40
CK50
CK60

50CrV4

60SiCr7

34CrMo4
36CrNiMo4
41CrAlMo7

----

21NiCrMo2

C100W1

X210Cr12

----

4001
4301

----

4401

F

AF NOR

E24
E28
E36

XC20

XC42H1

----

XC55

50CV4

----

35CD4

39NCD4

40CADG12

20NCD7
20NCD2

----

----

Z200C12

Y60SC7

----

Z5CN18.09

----

Z6CDN17.12

GB
SB

---­43
50

060 A 20
060 A 40

----

060 A 62
735 A 50

----

708 A 37

----

905 M 39

En 325

805 H 20

----

BS 1

BD2-BD3

----

----

304 C 12

----

316 S 16

USA

AISI-SAE

----

----

---­1020
1040
1050
1060

6150
9262

4135
9840

---­4320

4315

----

S-1

D6-D3

S5

410
304

----

316

S = THICKNESS

Hardness

BRINELL

HB
116
148
180
198
198
202
202

207
224

220
228
232

232
224

244
212
252
244

202
202
202
202

220
140
120
100

212
232
222

Hardness

ROCKWELL

HRB

67
80
88
93
93
94
94

95
98

98
99

100
100

98

102

96
103
102

94

94

94

94

98

77

69

56,5

96
100

98

R=N/mm²

360÷480
430÷560
510÷660
540÷690
700÷840
760÷900
830÷980

1140÷1330
1220÷1400

780÷930
880÷1080
930÷1130

760÷1030

690÷980

800÷1030

710÷980
820÷1060
800÷1030

670÷885

590÷685

540÷685

490÷685

620÷685

375÷440

320÷410

265÷314

245
600
420

14

SAR 331 SA GDS

SOLID Ø OR L MM

TILL 30 8
FROM 30 TO 60 6
FROM 40 TO 80 4 4/6

MORE THAN 90 3 3/4

Z CONTINUOUS
TOOTH DESIGN

Ø = DIAMETER L = WIDTH

Z COMBO

TOOTH DESIGN

5/8
4/6

9.4 - Cutting and advance speed

The cutting speed (m/min) and the advance speed (cm2/min = area
travelled by the disk teeth when removing shavings) are limited by
the development of heat close to the tips of the teeth.

- The cutting speed is subordinate to the resistance of the material
(R = N/mm
widest section.

- Too high an advance speed (= lowering of the saw frame) tends to
cause the disk to deviate from the ideal cutting path, producing
non rectilinear cuts on both the vertical and the horizontal plane.

The best combination of these two parameters can be seen directly
examining the chips.

Long spiral-shaped chips indicate ideal cutting.

2

), to its hardness (HRC) and to the dimensions of the

9.7 - Blade type

They differ essentially in their constructive characteristics, such as:

- shape and cutting angle of tooth

- pitch

- set

Shape and angle of tooth

REGULAR TOOTH: 0° rake and constant pitch.

Most common form for transversal or inclined cutting of solid small
and average cross-sections or pipes, in laminated mild steel and
grey iron or general metal.

POSITIVE RAKE TOOTH: 9° - 10° positive rake and constant pitch.
positive

Particular use for crosswise or inclined cuts in solid sections or large
pipes, but above all harder materials (highly alloyed and stainless
steels, special bronze and forge pig).

Very fine or pulverized chips indicate lack of
feed and/or cutting pressure.

Thick and/or blue chips indicate overload of
the blade.

9.5 - Blade running-in

When cutting for the first time, it is good practice to run in the
tool making a series of cuts at a low advance speed

(= 30-35 cm
to the cutting capacity and solid section of normal steel with R =
410-510 N/mm

2

/min on material of average dimensions with respect

2

), generously spraying the cutting area with lu-

bricating coolant.

9.6 - Blade structure

Bi-metal blades are the most commonly used. They consist in a sili­con-steel blade backing with electron beam or laser welded high speed
steel (HHS) cutting edge. The type of stocks are classified in M2,
M42, M51 and differ from each other because of their major hard­ness due to the increasing percentage of Cobalt (Co) and molybde­num (Mo) contained in the metal alloy.

COMBO TOOTH: pitch varies between teeth and consequently vary­ing teeth size and varying gullet depths. Pitch varies between teeth
which ensures a smoother, quieter cut and longer blade life owing to
the lack of vibration.
Another advantage offered in the use of this type of blade in the fact
that with an only blade it is possible to cut a wide range of different

distance between teeth

materials in size and type.

COMBO TOOTH: 9° - 10° positive rake.
positive

This type of blade is the most suitable for the cutting of section bars
and large and thick pipes as well as for the cutting of solid bars at
maximum machine capacity. Available pitches: 3-4/4-6.

15

SAR 331 SA GDS

Set

Saw teeth bent out of the plane of the saw body, resulting in a wide
cut in the workpiece.

REGULAR OR RAKER SET: Cutting teeth right and left, alternated
by a straight tooth.

Of general use for materials with dimensions superior to 5 mm. Used
for the cutting of steel, castings and hard nonferrous materials.

WAVY SET: Set in smooth waves.

This set is associated with very fine teeth and it is mainly used for

9.7.1 - RECOMMENDED CUTTING PARAMETERS

the cutting of pipes and thin section bars (from 1 to 3 mm).

ALTERNATE SET (IN GROUPS): Groups of cutting teeth right and
left, alternated by a straight tooth.

This set is associated with very fine teeth and it is used for extremely
thin materials (less than 1 mm).

ALTERNATE SET (INDIVIDUAL TEETH): Cutting teeth right and left.

This set is used for the cutting of nonferrous soft materials, plastics
and wood.

STEEL C UTTING SPEED LUBRICATION

CONSTRUCTION 60/80 EMULSIFIABLE OIL
CEMENTATION 40/50 EMULSIFIABLE OIL

CARBON STEEL 40/60 EMULSIFIABLE OIL
HARDENING A ND TE MPE RING 40/50 EMULSIFIABLE OIL
BEARINGS 40/60 EMULSIFIABLE OIL
SPRINGS 40/60 EMULSIFIABLE OIL

FOR TOOLS 30/40 EMULSIFIABLE OIL
FOR VALVES 35/50 EMULSIFIABLE OIL

STAINLESS STEEL 30/40 EMULSIFIABLE OIL
SPHEROIDAL GRAPHITE 20/40 EMULSIFIABLE OIL
CAST IRON 40/60 EMULSIFIABLE OIL

16

ALUMINIUM 80/600 KEROSENE
BRONZE 70/120 EMULSIFIABLE OIL
HARD BRONZE 30/60 EMULSIFIABLE OIL
BRASS 70/350 EMULSIFIABLE OIL
COPPER 50/720 EMULSIFIABLE OIL

SAR 331 SA GDS

10

MACHINE COMPONENTS

10.1 - List of spare parts

REFERENCE NUMBER DENOMINATION

1 Bedframe
2 Electric box
3 Electric box cover
4 Revolving arm lock lever
5 Arm lock bush
6 Machine hoisting hook
7 Crucible
8 Hydraulic unit cover
9 Cover
10 Refrigeranting liquid tank
11 Electropump
12 Bar stop body
13 Bar stop push rod
14 Bar stop rod
15 Revolving arm pin
16 Vice support
17 Revolving arm
18 Bearing 32008 X
19 Bushing
20 Screw
21 Hinge pin protection
22 Bearing 32008 X
23 Spacer
24 Hinge pin
25 Ring nut Guk M 40 x 1,5
26 Countervice r.h. jaw
27 Countervice l.h. jaw
28 Interchangeable plate
29 Countervice
30 Countervice anterior guard
31 Hinge pin support
32
33 Vice support
34 Rack
35 Rack support
36 Vice
37 Vice screw
38 Vice handwheel
39 Pin
40 Pawl
41 Vice jaw
42
43 Ring NILOS 32008 XAV
44 spring support
45 Spring
46

REFERENCE NUMBER DENOMINATION

60 Saw frame
61 Electric motor
62 Speed variator
63 Speed variator handwheel
64 Ring nut M 35 x 1,5
65 Speed reducer
66 Spacer
67 Cylinder sawframe superior

attacchment
68 Spacer flange
69
70 Microswith
71 Cylinder sawframe inferior

attacchment
72 Pin
73 Pin
74 Hydraulic cylinder

( SA GDS version )
75 Adjustable screw
76 Transmission flywheel pin
77 Ring nut Guk M 30 x 1,5
78 Blade tightening slide
79 Microswitch
80 Microswitch support plate
81 Handgripp
82 Blade tightening handwheel

pin
83 Blade tightening

handwheel
84 Blade tightening pin
85 Spring
86 Bracket
87 Ring NILOS 32006 XAV
88 Bearing 32006 X
89 Transmission flywheel
90 Ring nut Guk M 30 x 1,5
91 Bearing 6308 2RS
92 Ring NILOS 6308 AV
93 Bearing guard
94 Motor flywheel shaft
95 Motor flywheel
96 Cone clamping EURONIC

CN 54/S
97 Blade guide protection
98 Microswitch
99 R.h. flywheel protection
10 0 L.h. flywheel protection
10 1 Blade guide arm guide
10 2 Blade guide arm
103
104 Hand lever

17

REFERENCE NUMBER DENOMINATION

105
106 Additional protection
10 7 Fixed blade guide block
108 Blade cleaning brush
10 9 Brush support
11 0 Bearing 626
111 Bush
112
11 3 Short eccentric pin
11 4 Long eccentric pin
11 5 bearing 608 2RS
116 ring seeger
11 7 Upper blade guide pad
11 8 Side blade guide pad
119
120 Crucible
121 Coupling
122 Coupling
123 Cooling liquid cock
124 Flexible tube
125 Cooling distributor
126 Coupling
127
128
129
130 Bracke cylinder

( GDS version )

SAR 331 SA GDS

18

SAR 331 SA GDS

7

9

8

7

21

19

43

44

45

47

46

22

43

23

24

25

20

18

31

17

26

27

28

12

13

14

15

29

11

16

30

34

10

6

6

5

4

1

2

35

33

3

37

41

36

38

39

40

19

20

121

124

ZOOM - 3

122 126

123

126

123

125

61

130

74

121

73

76

77

75

78

79

80

81

82

83

86

84

85

71

87

88

113

114

115

116

63

64

65

67

72

70

89

88

117

118

62

68

66

101

102

90

87

97

100

104

106

60

98

91

93

94

107

120

92

95

96

119

117

118

111

110 109

99

ZOOM 2

ZOOM 4

108

114

113

115

116

SAR 331 SA GDS

ZOOM 1

407

SAR 331 SA GDS

KEY:
401 Main switch

402 Frame movement selector
403 Emergency pushbutton
404
405 Frame lowering regulator
406 Line pushbutton
407 Cycle start pushbutton
408 Indicator light

KEY:

411 Fuse holders (FU 1)
412 Fuse holders (FU 2)
413 Fuse holders (FU 3)
414 Relay
415 Hyd. switchboard motor teleswitch
416 Belt motor circuit breaker
417 Belt motor teleswitch
418 Transformer

401

SAR

START

1

408

406

405

402

403

418

417

KEY:
421 Hyd. switchboard motor

422 Solenoid valve
423 Hyd. switchboard casing
424 Regulator

411

421

412 413

414

415

423422

416

424

21

SAR 331 SA GDS

11

11.1 - Three-phase electric diagram

ELECTRIC DIA GRAM

THOMAS

THOMAS

22

QS1 Main switch
FU1 Fuse cartridge
KM1 Central motor control switch id.
KM2 Motor belt control switch
FR2 Thermal motor belt

M1 Motor gear case id.
M2 Belt motor
M3 Motor pump
FU2 Fuse cartridge
TC1 T r ansformer

SAR 331 SA GDS

THOMAS

THOMAS

FU3 Fuse cartridge
SB1 Emergency switch
SB2 On-line switch
KA Relay
HL Pilot light

SQ1 Dip-switch
SA1 Arch selector
EF RC coil
SQ2 Dip-switch
SQ3 Dip-switch

23

SAR 331 SA GDS

01 Sawframe downfeed regulator
02 Sawframe lifting speed regulator
03 Valve
04 Electric valve
05 Valve
06 Valve

24

SAR 331 SA GDS

12

This chapter lists the probable faults and malfunctions that could occur while the machine is being used and suggests possible remedies for
solving them.
The first paragraph provides diagnosis for TOOLS and CUTS, the second for ELECTRICAL COMPONENTS.

TROUBLESHOOTING

12.1 - Blade and cut diagnosis

FAULT PROBABLE CAUSE REMEDY

TOOTH BREAKAGE

Too fast advance

Wrong cutting speed

Wrong tooth pitch

Chips sticking onto teeth and in the gul­lets or material that gums

Defects on the material or material too
hard

Ineffective gripping of the part in the vice

Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.

Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section

tion table according to cutting and feed
speed.

Choose a suitable blade. See Chapter “Ma-

terial classification and blade selection”.

Check for clogging of cooling liquid drain
holes on the blade-guide pads and that flow
is plentiful in order to facilitate the removal
of chips from the blade.

Material surfaces can be oxidised or covered
with impurities making them, at the begin­ning of the cut, harder that the blade itself,
or have hardened areas or inclusions inside
the section due to productive agents used
such as casting sand, welding wastes, etc.
Avoid cutting these materials or in any case
perform cutting with extreme care, clean­ing and removing such impurities as quickly
as possible.

Check the gripping of the part.

Blade selec-

The blade gets stuck in the material
Starting cut on sharp or irregular sec­tion bars

Poor quality blade
Previously broken tooth left in the cut
Cutting resumed on a groove made pre-

viously
Vibrations
Wrong tooth pitch or shape

Insufficient lubricating refrigerant or
wrong emulsion

Teeth positioned in the direction oppo­site the cutting direction

Reduce feed and exert less cutting pressure.
Pay more attention when y ou start cutting.

Use a superior quality blade.
Accurately remove all the parts left in.

Make the cut elsewhere, turning the part.

Check gripping of the part.
Replace blade with a more suitable one.

See “Material classification and blade
selection” in the
Adjust blade guide pads.

Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.

Turn teeth in correct direction.

Blade Types

section.

25

SAR 331 SA GDS

FAULT PROBABLE CAUSE REMEDY

PREMATURE BLADE WEAR

Faulty running-in of blade

Teeth positioned in the direction oppo­site the cutting direction

Poor quality blade
Too fast advance

Wrong cutting speed

Defects on the material or material too
hard

Insufficient lubricating refrigerant or
wrong emulsion

See “Material classification and blade se-
lection” in the

Turn teeth in correct direction.

Use a superior quality blade.
Decrease advance, exerting less cutting

pressure. Adjust the braking device if
mounted on the machine.

Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section

Blade running-in

section.

Blade selec­tion table according to cutting and feed
speed.

Material surfaces can be oxidised or covered
with impurities making them, at the begin­ning of the cut, harder that the blade itself,
or have hardened areas or inclusions inside
the section due to productive agents used
such as casting sand, welding wastes, etc.
Avoid cutting these materials or in any case
perform cutting with extreme care, clean­ing and removing such impurities as quickly
as possible.

Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.

BLADE BREAKAGE

Faulty welding of blade

Too fast advance

Wrong cutting speed

Wrong tooth pitch

Ineffective gripping of the part in the vice

Blade touching material at beginning of
cut

The welding of the blade is of utmost impor­tance. The meeting surfaces must perfectly
match and once they are welded they must
have no inclusions or bubbles; the welded
part must be perfectly smooth and even.
They must be evenly thick and have no bulges
that can cause dents or instant breakage
when sliding between the blade guide pads.

Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.

Change speed and/or type of blade.
See chapter on “Material classification and
blade selection”, in the section

Blade selec­tion table according to cutting and feed
speed.

Choose a suitable blade. See Chapter “Ma-
terial classification and blade selection”.

Check the gripping of the part.

At the beginning of the cutting process,
never lower the saw frame before starting
the blade motor.

26

SAR 331 SA GDS

FAULT PROBABLE CAUSE REMEDY

STREAKED OR ETCHED BANDS

Blade guide pads not regulated or dirty
because of lack of maintenance

Blade guide block too far from material
to be cut

Improper position of blade on flywheels

Insufficient lubricating refrigerant or
wrong emulsion

Damaged or chipped blade guide
pad

Tight or slackened blade guide bearing

Check distance between blocks (see “Ma-
chine adjustments” in the

Blocks

section): extremely accurate guiding
may cause cracks and breakage of the tooth.
Clean carefully.

Approach head as near as possible to ma­terial to be cut so that only the blade section
employed in the cut is free, this will prevent
deflections that would excessively stress the
blade.

The back of blade rubs against the support
due to deformed or poorly welded bands (ta­pered), causing cracks and swelling of the
back contour.

Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked. Check the emulsion percentage.

Replace it.

Adjust it (see Chapter “Machine adjust-
ments” in

Blade guide

Blade Guide

section).

CUTS OFF THE STRAIGHT

Blade not parallel as to the counter-vice

Blade not perpendicular due to the ex­cessive play between the guide pads
and maladjustment of the blocks

T oo f ast advance

Blade guide block too far from material
to be cut

Worn out blade
Wrong tooth pitch

Check fastenings of the blade guide blocks
as to the counter-vice so that they are not
too loose and adjust blocks vertically; bring
into line the position of the degrees and if
necessary adjust the stop screws of the
degree cuts.

Check and vertically re-adjust the blade guide
blocks; reset proper side guide play (see
Chapter “Machine adjustments” in

guide

section).

Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.

Approach it as near as possible to material
to be cut so that only the blade section em­ployed in the cut is free, this will prevent de­flections that would excessively stress the
blade.

Replace it.
Blade with major density of teeth is being

used, try using one with less teeth (see Chap­ter “Material classification and blade se-
lection” in the

Blade Types

section).

Blade

27

SAR 331 SA GDS

FAULT PROBABLE CAUSE REMEDY

FAULTY CUT

STREAKED CUTTING SURFACE

Broken teeth

Insufficient lubricating refrigerant or
wrong emulsion

Worn out flywheels

Flywheel housing full of chips

Too fast advance

Poor quality blade
Worn out blade or with chipped and/or

broken teeth
Wrong tooth pitch

Blade guide block too far from material
to be cut

Irregular work of the blade due to the lack of
teeth can cause deflection in the cut; check
blade and if necessary replace it.

Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.

The support and guide flange of the band
are so worn out that they cannot ensure
the alignment of the blade, causing faulty
cutting; blade rolling and drawing tracks can
have become tapered. Replace them.

Clean with compressed air.

Decrease advance, exerting less cutting
pressure. Adjust the braking device if
mounted on the machine.

Use a superior quality blade.
Replace it.

Blade used probably has too large teeth; use
one with more teeth (see “Material classi-
fication and blade selection” in the

Types

section).

Approach it as near as possible to material
to be cut so that only the blade section em­ployed in the cut is free, this will prevent de­flections that would excessively stress the
blade.

Blade

NOISE ON GUIDE BLOCKS

28

Insufficient lubricating refrigerant or
wrong emulsion

Chipped bearings

Worn out or damaged pads

Check level of liquid in the tank. Increase the
flow of lubricating refrigerant, checking that
the hole and the liquid outlet pipe are not
blocked.
Check the emulsion percentage.

Dirt and/or chips between blade and guide
bearings. Replace them.

Replace them.

12.2 - Electrical components diagnosis

FAULT PROBABLE CAUSE REMEDY

SAR 331 SA GDS

MACHINE DOES NOT WORK

Power supply

Main disconnect switch

Fuses " FU 1 "

" SQ 1 " safety microswitch

Blade tightening microswitch

Emergency button " SB 1 " on
Cycle reset or line button " SB 2 "
Thermal relay of main motor

Transformer " TC 1 "

Fuse " FU 2 - FU 3 "

Check: - phases

- cables

- socket

- plug
Voltage must arrive upstream from the fuses
(terminal board).
It must be turned to ON position.
Check electrical efficiency. Check power line
connections and relative terminals.
Check electrical efficiency and check for
shorts that trigger these protections on the
power side of the circuit.
Check closing of the flywheel guard. Check
the efficiency of the device; replace it if dam­aged.
Make sure to have tightened the blade with
the relevant handwheel and to have actuated
the microswitch.
Ensure that it is off and that its contacts are
unbroken.
Check mechanical efficiency; replace if dam­aged.
Check that thermal relay protecting main
motor is correctly connected.

Check that the supply voltage is the same
as the line voltage and that it gives a value of
24 V at output.
Check fuse efficiency and ensure there are
no short circuits causing the protection on
the control side of the circuit.

Microswitch " SQ 2 "

MOTOR STOPPED WITH PILOT LIGHT
“HL” LIT

13

In accordance with point 1.7.4.f of the Machines Directive EEC 89/392

2 measurements with the machine operating unloaded.

- The microphone was been located close to the operator's head, at medium height.

- The weighted equivalent continuous acoustic pressure level was 66,1 dB (A).

- The maximum level of the WEIGHTED instantaneous acoustic pressure C was always less than 130 dB.
NOTE: with the machine operating, the noise level will vary according to the different materials being processed. The user must there-fore
assess the intensity and if necessary provide the operators with the necessary personal protection, as required by Law 277/1991.

NOISE TESTS

Remote-control switch " KM "

Motor " M 1 "

After having raised the saw frame, check
that the microswitch is not engaged and if
necessary check operating efficiency.

Check that phases are present at both in­put and output; ensure that it is not blocked,
that it closes when fed, that it does not cause
short circuits; otherwise change it.
Check that it is not burnt and that it turns
freely.
It may be rewound or changed.

29

PLATES AND LABELS

SAR 331 SA GDS

30

SAR 331 SA GDS

31

THOMAS S.p.A. - Via Pasubio, 32 - 36033 Isola Vicentina (VI) - Telephone 0444 / 97.61.05 - Fax 0444 / 97.69.34