widos RSC 2000 User manual

Kunststoffschweißtechnik
WIDOS Einsteinstr. 5 Phone ++49 (0)7152 / 9939 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax ++49 (0)7152 / 9939 - 40
Internet: www.widos.de email: [e-mail]
Headquarters: D-71254 Ditzingen-Heimerdingen country court Stuttgart HRB 200973 managing director: Jürgen Dommer
Working Instructions
Translation
Saw RSC 2000
Keep for further use!

Kunststoffschweißtechnik
Product identification
08.10.14 Working instructions WIDOS RSC 2000 Page 2 of 63
Type: Saw RSC 2000
Serial number / year of construction: see type label
Customer entries
Inventory No.:
Location:
Order of spare parts and after sales service
Address of manufacturer WIDOS
W. Dommer Söhne GmbH
Einsteinstr. 5
D -71254 Ditzingen-Heimerdingen
Phone: ++49 7152 / 99 39 - 0
Fax: ++49 7152 / 99 39 - 40
[email protected]e
Internet: www.widos.de
Address of the subsidiary companies:
WIDOS
WIDOS GmbH W. Dommer Söhne AG
An der Wiesenmühle 15 St. Gallerstr. 93
D-09224 Grüna / Sachsen CH– 9201 Gossau
Phone: ++49 371 / 8 15 73 - 0 Phone: [phone]
Fax: ++49 371 / 8 15 73 - 20

Kunststoffschweißtechnik
Introduction
08.10.14 Working instructions WIDOS RSC 2000 Page 3 of 63
Purpose of the document
These working instructions give you information about all important questions which refer to
the construction and the safe working of your machine.
Just as we are, you are obliged to engage in these working instructions, as well.
Not only to run your machine economically but also to avoid damages and injuries.
Should questions arise, contact our service team in the factory or in our subsidiary companies.
We will help you with pleasure.
According to our interest to continuously improve our products and working instructions, we
kindly ask you to inform us about problems and defects which occur in exercise.
Thank you.
Structure of the working instructions
This manual is arranged in chapters which belong to the different using phases of the
machine.
Due to this structure, the searched information can be easily found.
10/8/2014 WIDOS
W. Dommer Söhne GmbH
Einsteinstraße 5
D-71254 Ditzingen-Heimerdingen
All rights reserved.
Reprinting only allowed with permission of the corporation.
Any changes are subject to technical innovations.

Kunststoffschweißtechnik
Contents
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1. DESCRIPTION OF THE PRODUCT................................................................................ 6
1.1. Usage and purpose-oriented use........................................................................................6
1.2. Safety measures ...................................................................................................................6
1.3. Conformity.............................................................................................................................6
1.4. Designation of the product ..................................................................................................7
1.4.1. Technical data ................................................................................................................7
1.4.2. Electrical data.................................................................................................................7
1.4.3. Electrical data vacuums AF 22.......................................................................................8
1.4.4. Technical data laser .......................................................................................................8
1.5. Equipment and accessories ................................................................................................8
1.6. Wear parts list .......................................................................................................................8
2. SAFETY RULES.............................................................................................................. 9
2.1. Explanation of the symbols and indications......................................................................9
2.2. Obligations of the owner....................................................................................................10
2.3. Obligations of the operator................................................................................................10
2.4. Measures of organization ..................................................................................................10
2.5. Information about safety precautions ..............................................................................10
2.6. Instructions for the staff ....................................................................................................10
2.7. Dangers while handling the machine ...............................................................................11
2.8. General safety indications .................................................................................................11
2.9. Specific dangers .................................................................................................................12
2.9.1. Danger of cutting or catching clothes...........................................................................12
2.9.2. Danger of stumbling over pneumatic and electric wires ..............................................12
2.9.3. Danger of laser beams.................................................................................................12
2.9.4. Danger of getting injured by chips / oddments / noise.................................................12
2.10. Maintenance and inspection, repair..................................................................................12
2.11. Remaining risks ..................................................................................................................12
2.12. Structural modifications on the machine.........................................................................13
2.13. Warranty and liability..........................................................................................................13
3. FUNCTIONAL DESCRIPTION ...................................................................................... 14
4. OPERATING AND INDICATING ELEMENTS .............................................................. 15
4.1. Machine overview ...............................................................................................................15
4.2. Operator console ................................................................................................................16
4.2.1. Operator panel .............................................................................................................16
4.2.2. Emergency stop switch ................................................................................................17
4.2.3. Main switch...................................................................................................................17
4.2.4. Elements in switch cabinet...........................................................................................18
4.3. Laser (optional) ...................................................................................................................19
4.4. Pipe supports and prisms..................................................................................................19

Kunststoffschweißtechnik
Contents
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4.5. How to clamp pipes ............................................................................................................20
4.6. How to adjust angles..........................................................................................................22
4.7. Pneumatic ............................................................................................................................23
4.7.1. Service unit...................................................................................................................23
4.7.1.1. How to adjust the regulator:.....................................................................................23
4.7.2. How to adjust the pressure regulator: ..........................................................................24
4.8. Vacuum ................................................................................................................................24
5. STARTING AND OPERATING...................................................................................... 25
5.1. Starting.................................................................................................................................25
5.2. How to switch on the saw..................................................................................................26
5.2.1. How to calibrate angles................................................................................................26
5.2.2. How to set the time, date and language ......................................................................27
5.3. How to make vertical cuts..................................................................................................28
5.4. How to cut angles ...............................................................................................................29
6. MAINTENANCE / STORAGE / TRANSPORT .............................................................. 31
6.1. In general .............................................................................................................................31
6.2. Storage.................................................................................................................................31
6.3. How to align the saw ..........................................................................................................32
6.4. How to maintain and replace the cutting chain ...............................................................32
6.5. How to clean / replace the chip bag..................................................................................33
6.6. Service unit..........................................................................................................................34
6.7. How to protect the machine parts against corrosion .....................................................34
6.8. Disposal ...............................................................................................................................34
7. ELECTRIC AND PNEUMATIC DIAGRAMS ................................................................. 35
8. DECLARATION OF CONFORMITY .............................................................................. 63

Kunststoffschweißtechnik
Contents
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1. Description of the product
This chapter gives important basic information about the product and its prescribed use.
All technical details of the machine are put together as a general arrangement.
1.1. Usage and purpose-oriented use
The WIDOS Saw RSC 2000 is special machinery for the straight cutting plastic pipes up to Ø
2400 mm, and an angle of max. 45° on both sides resp. 67,5° on one side, in the way
described as follows.
All use going beyond is not purpose-oriented.
The purpose-oriented use includes also that a sufficiently dimensioned, operational suction
plant is connected to the machine.
The described plastic band saw may only be operated, maintained and repaired by persons
who are trained and informed about the dangers.
The machine is a workshop machine and not suitable for operation in hazardous locations.
It is forbidden to cut wood and sheets made out of wood (e.g. pressboard).
The manufacturer is not responsible for any damages caused by inexpert handling or
operation.
For personal injuries, material and immaterial damages resulting herefrom, only the user is
responsible!
Also part of the purpose-oriented use is
respecting all the indications of the working instructions and
performing the inspection and maintenance work.
1.2. Safety measures
In case of wrong use, wrong operation or wrong maintenance, the machine itself or products
standing nearby can be damaged or destroyed.
Persons being in the endangered area may be injured.
Therefore these working instructions have to be thoroughly read and the corresponding safety
regulations must be necessarily adhered to.
1.3. Conformity
The machine corresponds in its construction to the valid recommendations of the European
Community as well as to the according European standard specifications.
The development, manufacturing and mounting of the machine were made very carefully.

Kunststoffschweißtechnik
Description of the product Chapter 1
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1.4. Designation of the product
The product is designated by a type label at the basic mounting.
It contains the type, the serial number and the year of construction of the machine.
1.4.1. Technical data
Total height: appr. 4130 mm
Total depth: appr. 7000 mm
Total width: appr. 7600 mm
Length pipe supports (Prisms): 2400 mm
Max. diameter of pipes: 2000 mm
Length cutting chain: 6000 mm / 200 chain links
1.4.2. Electrical data
Feeding: 14 kVA
Voltage: 400V AC
Plug: CEE-32 A
Frequency: 50 Hz
Motor-pipe clamping left / right
Voltage: 400V AC
Power each motor: 2,2 kW
Current each motor: 5,4 A
Cutting chain
Voltage: 400V AC
Power: 5,06 kW
Current maximum: 95,6 A
Speed of chainsaw motor: 0 – 3000 rpm
Cutting speed of saw drive: 0 – 400 m/min
Travel chainsaw
Voltage: 400 V
Power chainsaw travel: 1,4 kW
Current maximum: 12,0 A
Rotational speed of travel motor: 0 – 5000 rpm

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Description of the product Chapter 1
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1.4.3. Electrical data vacuums AF 22
Voltage saw motor: 400V
Frequency: 50 Hz
Power saw motor: 3 kW
Current: 5 A
Speed of saw motor/travel motor 200 rpm
1.4.4. Technical data laser
Range: 2-3 m
Power: 5 mW
1.5. Equipment and accessories
Pieces Name
1 Key for switch cupboard; hand out the key to authorized persons only
1 each Key for key switch of manual mode, travel brake and toothed chain brake
1 Cutting chain 6000 mm (200 chain links)
1 Working instruction for vacuum AF22 (Felder)
1 Working instruction laser Z5-24
2 Tension belt with soft eye, 15 m
1.6. Wear parts list
Pieces/
Mach. Name Article-No.
1 Cutting chain 6000 mm (200 chain links) on request
1 Laser Z5-24 on request
2 Tension belt with soft eye, 15 m 8505000-15
1 (2) each Filter bag, chip bag, filter … see working instruction
AF 22

Kunststoffschweißtechnik
WIDOS Einsteinstr. 5 Phone ++49 (0)7152 / 9939 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax ++49 (0)7152 / 9939 - 40
Internet: www.widos.de email: [e-mail]
08.10.14 Working instructions WIDOS RSC 2000 Page 9 of 63
2. Safety rules
The base for the safe handling and the fault-free operation of this machine is the knowledge of
the basic safety indications and rules.
These working instructions contain the most important indications to run the machine safely.
The safety indications are to be followed by all persons working with the machine.
2.1. Explanation of the symbols and indications
In the working instructions, following denominations and signs are used for dangers:
This symbol means a possible danger for the life and the health of persons.
The disrespect of these indications may have heavy consequences for the
health.
This symbol means a possible dangerous situation.
The disrespect of these indications may cause light injuries or damages on
goods.
This symbol means a possible dangerous situation by moving parts of the
machine
The disrespect of these indications may cause heavy crushing of parts of the
body resp. damages of parts of the machine.
This symbol gives important indications for the proper use of the laser.
The disrespect of these indications may cause light injuries or damages on
goods.
This symbol gives important indications for the proper use of the machine.
The disrespect of these indications may conduct to malfunctions and
damages on the machine or on goods in the surrounding.
This symbol means a possible risk of injury by sawdust.
It is obligatory to wear safety glasses.
This symbol means a possible risk of injury by noises exceeding 80 dB (A).
Ear protection is obligatory.
Under this symbol you get user tips and particularly useful information.
It is a help for using all the functions on your machine in an optimal way and
helps you to make the job easier.
The regulations for the prevention of accidents are valid (UVV).

Kunststoffschweißtechnik
Safety rules Chapter 2
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2.2. Obligations of the owner
The owner is obliged only to let persons work at the machine who
know about basic safety and accident prevention rules and are instructed in the handling of
the machine, as well as who
have read and understood the safety chapter of this manual and certify this by their
signature.
The safety-conscious working of the staff has to be checked in regular intervals.
2.3. Obligations of the operator
All persons who are to work at the machine are obliged before working:
to follow the basic safety and accident protection rules.
to have read and understood the safety chapter and the warnings in this manual and to
confirm by their signature that they have well understood them.
to inform themselves about the functions of the machine before using it.
2.4. Measures of organization
All equipment required for personal safety is to be provided by the owner.
All available safety equipment is to be inspected regularly.
2.5. Information about safety precautions
The working instructions have to be permanently kept at the place of use of the saw.
They are to be at the operator's disposal at any time and without much effort.
In addition to the manual, the common valid and the local accident protection rules and
regulations for the environmental protection must be available and followed.
All safety and danger indications on the machine have to be in a clear readable condition.
Every time the machine changes hands or is being rent to third persons, the working
instructions are to be sent along with and their importance is to be emphasized.
2.6. Instructions for the staff
Only skilled and trained persons are allowed to work at the saw.
It must be clearly defined who is responsible for transport, mounting and dismounting,
starting the operation, setting and tooling, operation, maintenance and inspection, repair
and dismounting.
A person who is being trained may only work at the machine under supervision of an
experienced person.

Kunststoffschweißtechnik
Safety rules Chapter 2
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2.7. Dangers while handling the machine
The band saw WIDOS RSC 2000 is constructed according to the latest technical standard and
the acknowledged technical safety rules.
However, dangers for the operator or other persons standing nearby may occur. Also material
damages are possible.
The machine may only be operated:
according to the purpose-oriented usage
in safety technical impeccable status
Disturbances which may affect the safety of the machine must be cleared immediately.
2.8. General safety indications
A working area without obstacles around the machine and a non-slip and plane floor are of
basic importance for a safe operation.
The working area must be well lightened and free of waste (cuttings, residues).
Check before starting with the work whether the tooth chain is tensioned correctly.
During the operation, wear tight clothes only.
Keep the handles dry and free from oil and grease.
Wear safety glasses and ear protection during the cutting operation.
Do not wear rings, bracelets etc.
Protect long hair by means of a sufficient headgear.
During work, the pipe must be clamped firmly.
Do never remove reminders as long as the saw is working.
In case of irregular running behavior of the saw blade, switch off the saw immediately and
check the saw blade for correct course, correct tension and possible fractures.
Replace dull or badly set saw blades by orderly installed saw blades.
Before elimination of any disturbances, and before any repair or maintenance work, switch
off the saw and disconnect in any case the mains plug.
Protect the machine from wetness and humidity.
Only skilled persons are allowed to work at electrical appliances.
The electrical equipment of the machine has to be checked regularly. Loose
connections and damaged cables have to be replaced or repaired immediately.
System parts and pressure hoses should be depressurized before beginning of
any repair work.
There is a danger of injuring the eyes by compressed air coming out suddenly.
Replace damaged pneumatic hoses immediately.
Make a visual inspection of the pneumatic hoses before each work beginning.

Kunststoffschweißtechnik
Safety rules Chapter 2
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2.9. Specific dangers
2.9.1. Danger of cutting or catching clothes
You can cut yourself during sawing or when exchanging the cutting chain!
Before starting the cutting operation, take care that no person is standing in
the operating or cutting area.
Always wear safety gloves when exchanging the cutting chain.
2.9.2. Danger of stumbling over pneumatic and electric wires
Make sure that no person has to step over the wires.
Lay the wires in such a way that the danger is kept to a minimum.
Do not squeeze, buckle etc. the wires.
2.9.3. Danger of laser beams
Only turn-on the laser for the sawing function. Pay attention that nobody has to
watch the reflected or direct laser beam for too long time, or the person has to
wear eye-protection glasses. Do not straighten laser on people.
2.9.4. Danger of getting injured by chips / oddments / noise
Wear safety glasses during cutting!
Never remove oddments as long as the saw is running!
Wear ear protection during cutting!
2.10. Maintenance and inspection, repair
All maintenance and repair work have to be basically performed with the machine
in off position.
During this, the machine has to be secured against unauthorized switching on.
2.11. Remaining risks
Even at purpose-oriented use and even if following all the relevant safety instructions, the
following risks are remaining due to the construction conditional on the purpose of operation of
the machine:
Injuries caused by parts of the work pieces which are squirting away.

Kunststoffschweißtechnik
Safety rules Chapter 2
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2.12. Structural modifications on the machine
No modifications, extensions or reconstructions may be made on the machine without
permission of the manufacturer. In case of disrespect the warranty or liability will expire.
Machine parts which are not in a perfect condition are to be immediately replaced.
Only use original WIDOS spare and wear parts.
In case of purchase orders please always indicate the machine number!
2.13. Warranty and liability
Fundamentally our "General Sales and Delivery Conditions" are valid.
They are at the owner's disposal latest when signing the contract.
Guarantee and liability demands referring to personal injuries or damages on objects are
excluded if they are caused by one or several of the following reasons:
Not using the machine according to the prescriptions;
Inexpert transport, mounting, starting, operating, and maintenance of the machine;
Running the machine with defective or not orderly mounted safety appliances;
Ignoring the information given in this manual;
Structural modifications on the machine without permission;
Unsatisfactory checking of parts of the machine which are worn out;
Repairs performed in an inexpert way;
In case of catastrophes and force majeure.

Kunststoffschweißtechnik
WIDOS Einsteinstr. 5 Phone ++49 (0)7152 / 9939 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax ++49 (0)7152 / 9939 - 40
Internet: www.widos.de email: [e-mail]
08.10.14 Working instructions WIDOS RSC 2000 Page 14 of 63
3. Functional description
Basically, the international and national process guidelines are to be
followed.
After its activation, the saw drives into reference position (chapter: 5.2).
Adjust the saw to the requested angle and secure it by clamping / latching.
Shift the pipe onto the pipe supports and clamp tightly (check distance to the cutting chain!).
Switch on the line laser.
Switch on the vacuum device.
Having finished all adjusting work, start the travel motor and drive the cutting chain towards the
pipe stopping shortly in front of it.
Afterwards start the cutting chain and cut the pipe through.
Having finished the cutting, drive the cutting chain behind the pipe and shut it off.
The line laser switches off.
The vacuum switches off.
Now remove the remaining chips, unclamp the pipe and remove it.
The cutting is completed.

Kunststoffschweißtechnik
WIDOS Einsteinstr. 5 Phone ++49 (0)7152 / 9939 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax ++49 (0)7152 / 9939 - 40
Internet: www.widos.de email: [e-mail]
08.10.14 Working instructions WIDOS RSC 2000 Page 15 of 63
4. Operating and indicating elements
4.1. Machine overview
No. Denomination / Function
1 Bridge, may be swiveled
2 Spring balancer with triangle, to keep the belts not being tensioned at the top
3 Clamping belt, to clamp the pipes, 2 pieces
4 Line laser, to show the cutting edge of the pipe
5 Operator console, mobile
6 Prism, 4 pieces
7 Guiding rail with cutting chain
8 Machine table, revolves with bridge
9 Swing rail with centering plates
10 Leveling foot, to adjust the saw
no picture Vacuum
1
7
6
9
3
2
4
5
10
8

Kunststoffschweißtechnik
Operating and indicating elements Chapter 4
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4.2. Operator console
4.2.1. Operator panel
No. Name / Function
11 Key holder to tension the brake of the cutting tooth chain: to switch on the brake
<0> / to release brake <I>, when the brake is released you may change the cutting
chain.
The key may be withdrawn in position <0>*.
12 Key switch - brake of the cutting chain travel: switches the brake on <0> / brake
released <I>, when the brake has been released, you may shift the cutting chain
manually.
The key may be withdrawn in position <0>*.
13 Control lamp of cutting chain tension: glows in red if the cutting chain is not
tensioned resp. when it is broken the cutting is stopped resp. may not be started
14 Emergency-stop: stops travel motor, cutting motor and vacuum
15 Start button: to drive the cutting tooth chain into initial position after its activation in
order to adjust
16 Display shows the current parameters, several values can be shown at the same
time.
Operator panel
Switch cabinet with fuses
and servo controllers
Main switch
Front trolleys (adjustable) Rear trolleys
12
11
13
14
16
15
17
18
19
20
22
24
23
25
26
27
28
30
29
31
32

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Operating and indicating elements Chapter 4
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No. Name / Function
17 Buttons <+> / <-> (only for diagnosis)
18 Button <Enter> (only for diagnosis)
19 Button <C>: to cancel the reference drive
20 Button <Planer>: to adjust the current angle to 0° / to cancel the reference drive
21 Button: to switch on / shut off the vacuum
22 Button laser: to switch on / shut off the laser
23 Joystick pipe clamping 1: upwards: to release the clamping / downwards: to clamp
pipe
24 Joystick pipe clamping 2: upwards: to release the clamping / downwards: to clamp
pipe
25 Button pipe lifter 1 (option), to lift / to lower
26 Button pipe lifter 2 (option), to lift / to lower
27 Switch angle 67,5-45, left side: to clamp all angles / right side: clamping released
28 Switch angle 67,5/45/0/45, left side: to arrest the angles in the preset positions /
right side: arresting released
29 Rotational speed of the cutting chain travel: to adjust the travel speed
30 Control lever of the cutting chain travel: to drive the cutting chain to the right / to
the left 
31 Control lever of the cutting chain button, you may only start the cutting chain by
keeping the button pressed
32 Rotational speed regulator of the cutting chain, to adjust the chain speed
*Important! Hand over key only to authorized personnel.
4.2.2. Emergency stop switch
The emergency-stop is located on the operator panel. In case of danger for man, workpiece or
machine, press the emergency-stop.
The button snaps into place if activated. The saw motor and the travel motor stand still.
The pipe clamping remains active, the display shows:
Display:
2nd line:
** emergency stop **
After having cleared the dangerous situation, the Emergency Stop must be unlocked by turning
/ pulling.
Afterwards, you must restart the saw by main switch.
4.2.3. Main switch
You activate and shut down the machine with the main switch.
Shut down the machine and secure switch against
unintentional activation when working within the machine.

Kunststoffschweißtechnik
Operating and indicating elements Chapter 4
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4.2.4. Elements in switch cabinet
No. Denomination / Function
F1 Circuit breaker, 3 pieces, B32A, fuse motor drive
F2 Circuit breaker, K8A; fuse control
F8 Circuit breaker, B6A; fuse for service socket
F10 Motor protector, 4,5-6,3A, travel chain saw
F40 Motor protector, 20-25A, chain saw
F50 Motor protector, 9-12A clamping pipe left
F60 Motor protector, 9-12A clamping pipe right
F80 Motor protector, 4,5-6,3A, vacuum
M10 Servo control travel chain saw
M40 Servo control chain saw
Q2 Contactor emergency stop
Q51 Contactor pipe release left
Q52 Contactor pipe clamp left
Q61 Contactor pipe release right
Q62 Contactor pipe clamp right
Q80 Contactor vacuum
T3 24V – switching power supply
XS8 Service socket 230V, max. 6A
F1 / F2 / F8 / F10 / F40 / F50 / F60 /
F80 / Q2 / Q52 / Q62 / T3
M40 / M10
Q51 / Q61 / Q80 / XS8

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Operating and indicating elements Chapter 4
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4.3. Laser (optional)
The line laser Z5 is mounted inwards to the bridge column 1.
The laser beam shows the cutting course on the clamped
pipe.
The light beam is adjusted in a way that it corresponds to the
cutting chain vertically. In case it is misaligned, you will have
to readjust it vertically.
Switch on and shut off the laser by on the operator
console.
Please gather the exact adjustment of the laser from the
attached working instructions of the manufacturer.
4.4. Pipe supports and prisms
On both sides, you will find mounted pipe supports with prisms and (optional) pipe lifters.
The prisms are guided between the fixing guide rails
inside and the terminal strips outside.
You can adjust the prisms depending on pipe size
and the pipe sawing angle (arrows).
Right picture shows pipe support with one prism. The rows of holes for the fixingguide rails
and terminal strips are marked on the side without a prism, depending on pipe size:
hole patterns for pipe size OD 630 mm up to OD 2200 mm
hole patterns for pipe size OD 1500 mm up to OD 2000 mm
hole patterns for pipe size OD 2200 mm up to OD 2500 mm (not used)
Mount the fixing guide rails and terminal strips with the prisms depending on pipe size on
the pipe support.
Move the prisms depending sawing angle so that the prisms are always close to the saw
cut.
Clamp the positions of the prisms with the clampimg levers.
Laser
Prism Prism
Terminal strip with clamping lever
Fixing guilde rail

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Operating and indicating elements Chapter 4
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4.5. How to clamp pipes
Clamp the pipe by two clamping belts.
The clamping belts are hanging in the belt holders on the inside or outside; the spring
balancers are guided by the triangles and are then tensioned by the belt winders electrically.
The clamping belt is to be suspended from the inside or outside belt holders according to the
pipe size. Please observe upon selecting the belt holder that the pipe is clamped optimally.
In order to replace the suspension disassemble the respective bolt and suspend the belt
from another bolt.
Holder inside for
tensioning belt (below
the table)
Holder outside for
tensioning belt
Clamping belt noose
Bolt
Spring balancer
Tension belt
Belt winder
Holder inside for
tensioning belt
Holder outside for
tensioning belt
Triangle