Rights reserved to alter specifications without notice.
TOCe
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1INTRODUCTION
1.1Mode of operation -- Control box
The control box consists of four units, the working area, the library, the notebook
and the auxiliary function.
SIn the working area the welding program is created.
SIn the library the program can be stored.
During welding it is always the contents of the working area that control the
welding process. Thus it is also possible to call in a welding program from the
library to the working area.
SIn the notebook you can make your own notes about special welding
parameters, for example.
SIn the auxiliary function you can:
Schange languages
Sview all existing error messages
Sshow actual parameter values
Ssoftware upgrade
Ssofware key
1.2Sectors
A welding program for welding of tubes can be divided into different parts or sectors.
Each sector corresponds to a special part of the circumference of the tube. Max.
number of sectors for one program is one hundred (100).
Sector 4
Sector 3
A sector can be assigned its own set of values for different welding parameters, such
as current, rotation speed, wire feed speed, etc. In this way the welding can be
performed using different parameter settings for different parts of the joint of the
tube.
The division into sectors is done by indicating different breakpoints along the
circumference of the tube. Each such breakpoint constitutes the starting point of anew sector. In the figure below, the breakpoint 0.000 is the starting point of sector 1,
breakpoint 0.250 the starting point of sector 2, etc.
Sector 1
Sector 2
Breakpoint 0,750
Sector 3
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Breakpoint 0,000
Sector 4
Breakpoint 0,500
Sector 1
Breakpoint 0,250
Sector 2
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LTS allows welding of up to 10 turns in the same welding joint, i.e. the welding tool
can be rotated 10 times round the tube.
The breakpoints in the previous figure all start with the integer 0 which means that
they form the breakpoints of turn 1. The breakpoints of turn 2 (if there is one)
always start with the integer 1,etc.
To terminate a welding program a so--called end sector is indicated.
For a sector to be counted as an end sector the following two conditions must be
fulfilled:
SThere is no sector following.
SThe welding current value of the sector = 0 ampere.
1.3Display and keyset
ADisplay, BSoft keys, C Function keys
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Display
a
SECTOR 2(4)
WELD GAS
15
ROOT GAS
e
START GAS
0.500
s
s
s
c
b
5
g
d
h
WELD
GAS
ROOT
GAS
START
GAS
f
The following information is shown in the display.
aThe program sector at present involved.
bThe number of sectors in the current program.
cThe breakpoint of the sector (sector 2 in this example).
dThe digit box shows the numerical value entered and different
numerical characters. For further information, see page 68.
eShowing that the indicated value has been borrowed from a previous
sector (in this example from sector 1).
g5 text boxes describing the function of the so --called soft keys (f).
hMessage line describing the actual state.
WELDING = a welding sequence is going on.
END= a welding sequence is completed.
TRANSPORT= transfer without welding.
STOP= the welding sequence was interrupted due to activation of the stop
key.
keys
Soft
By way of the soft keys (a) the functions connected with the respective display (in
this case the GAS parameter display), the significance of which is indicated in the
text boxes (b). Depending on the display selected, up to five soft keys can be
activated.
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Function keys
Parameter keys
The welding parameters are divided into five different groups, each group
represented by one ordinary key and a set of soft keys.
Welding currentGas
Rotation speedWire feed speed
Preheating time
SHIFT key
This key is used for changing the significance of other keys on the keyboard.
PLUS/MINUS keys
These keys are used for increasing/decreasing set values.
Numerical keys
These keys are used for entering the digits 0--9 and decimal point.
Other keys
SLOPE
This key is used when you want to add a slope function to a parameter and is
indicated in the following way in the display
.
By slope is meant a gradual change of a set value.
Slope up = gradual increase
Slope down = gradual decrease
The following parameters can be assigned a slope function:
Current (both peak and background current) when pulsed current is used, rotation,
wire feed speed.
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A slope can be time--controlled by indicating that it shall go on for a certain number
of seconds. It can also be sector--controlled, making it a so--called sector slope, by
indicating between which two breakpoints it shall be located.
SECTOR
This key indicates the breakpoint of a program and moving to indicated sector.
STEP
This key is used for stepping forward in the program.
DELETE
This key is used for deleting the whole program, part of a program in the working
area, or just the figures in the digit box.
MANUAL MODE
This key is used for positioning the electrode before welding, and for making sure
that the program in the working area functions as desired.
MEMORY (library)
This key is used for entering or leaving the library and for storing a program, or for
recalling a program from the library to the working area.
MODE (auxiliary fu nctions)
This key is used for getting to the different auxiliary functions, such as language,
error log, show actual parameter values and software upgrading.
NEXT
This key is not used.
NOTEBOOK
These keys are used if you want to make notes on a welding sequence.
TOOL CODE
These keys are used if you want to view the code of the connected tool.
RESTART
These keys are used for restarting a welding sequence.
SECTOR SLOPE
These keys are used if you want to create a sector slope.
DIRECT STOP
Pressing th is key will lead to direct stop of the welding. The gas postflow takes place
according to settings in the end sector.
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START
This key is used for starting a welding sequence.
STOP
This key is used for stopping a welding sequence. The welding sequence is
terminated according to the settings in the end sector.
2WELDING PARAMETERS
Setting ranges for the welding parameters can be found in the APPENDIX on page
68.
2.1Welding current
There are four different parameters for welding current:
SPEAK CURRENT
SBACKGROUND CURRENT
SPEAK TIME (1 s)
SBACKGROUND TIME (1 s)
The values in brackets are preset values.
Peak time
Background time
Peak current
Background current
The welding current can be either pulsed or continuous (not pulsed).
If you want to weld using pulse current a value must be entered for all four
parameters. When welding with continuous current, however, you only need to enter
the value for peak current. Entering a value also for background current will result
in pulsed current with preset pulse and background times. Of course, the pulse
and background times can also be changed.
2.2Gas
In the Shielding Gas parameter group three parameters are represented:
SWELD GAS
SROOT GAS
SSTART GAS
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By weld gas is meant the shielding gas on the upper side of the joint. The weld gas
parameter indicates the time the shielding gas is to flow on the upper side of the joint
before and after welding.
The values of the weld gas parameter are preset. The following values for preflow
and postflow of the weld gas apply at the start if nothing else has been indicated:
SWeld gas preflow = 2 s
SWeld gas postflow = 4 s
By root gas is meant the shielding gas on the underside of the joint. The root gas
parameter indicates the time the shielding gas is to flow on the underside of the joint
before and after welding.
Some shielding gases, for example helium (He), can cause difficulty with regard to
striking the arc. If such a shielding gas is to be used as weld gas, it could be
advisable to use another gas mixture at the start moment -- a so--called start g as .
If one value is entered for weld gas in sector 1 and one for start gas, only the start
gas is going to flow. The weld gas starts flowing when the arc is struck.
2.3Wire feed speed
This parameter is used to indicate the desired feed speed of the filler wire in cm /m in.
The wire feed speed can be pulsed or continuous (not pulsed).
In the Wire Feed Speed parameter group two parameters are represented:
SPEAK WIRE FEED SPEED
SBACKGROUND WIRE FEED SPEED
For welding with continuous (not pulsed) wire feed speed, only the peak wire feed
parameter shall be entered.
For welding with pulsed wire feed speed, both the peak wire feed speed and thebackground wire feed speed parameters shall be entered.
The pulsed wire feed speed is always automatically synchronised with the welding
current. The wire feed speed is high using pulse current and low using background
current.
2.4Preheating time
Preheating is used for heating the workpiece at the starting point in order to obtain
correct penetration of the molten pool. The preheating time is defined as the time
elapsing between arc strike and start of the rotary motion. If no value has been
entered for the preheating param eter, the arc will strike at the same time as rotation
is started.
NOTE! In the Welding Current parameter group you cannot indicate a sector slope
when preheating is involved.
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2.5Rotation speed
This parameter indicates the rotation speed of the electrode round the workpiece. It
is indicated in per mill (thousandths) of the max. rotation speed of the welding tool
used.
Just like welding current and wire feed speed, the r otation speed can be pulsed or
continuous (not pulsed).
In the Rotation Speed parameter group four parameters are represented:
Pulsed rotation is automatically synchronised with the welding current so that the
welding tool stands still when the peak current sets in and rotates during background
current.
3START AND STOP
3.1Start
To start the welding, use the START key.
It is impossible to start a welding program if another tool code has been indicated
than the one used in the program in question.
3.2Stop
A requested welding stop over the STOP keymeans that the program jumps to
the following end sector, no matter which sector you are in at the moment. The
welding is terminated according to the settings of the end sector.
A requested welding stop over the DIRECT STOP key
of the welding. The gas postflow takes place according to the time set in the end
sector.
leads to immediate stop
3.3Restart
If the welding was interrupted it is restarted with the SHIFT and START keys
.
Irrespective of whether the welding was stopped over the STOP
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or the DIRECT STOP key, the start parameters of the preceding start
sector are used. The program then continues from the position in the welding
program where it was interrupted.
4TO GET STARTED
4.1General
Some of the factors controlling the welding process are specific to each one of the
welding tools, for example the rotation speed. Therefore, every welding program
must be connected to a tool code, associated with the tool that the program was
made up for.
4.2How to indicate a tool code
STurn the mains switch on the welding power source to position 1.
SThe following display comes up:
CHOOSE CONNECTED TOOL
PRB"
PRH
PRD
POC 12--60 mm
TIG HAND TORCH
A25
NEXT
ENTER
Example: You have connected PRB 33-- 90
SMove the marking to the line for PRB using the soft key NEXT. Choose the
desired tool and press ENTER.
A window comes up, showing available tool sizes.
SMove the marking to the size of the tool you have connected (in this example
33 --90 mm) using the soft key NEXT and press ENTER.
CHOOSE CONNECTED TOOL
PRB"8-- 17 mm
PRH17-- 49 mm
PRD33-- 90 mm
POC 12--60 mm60--170 mm
TIG HAND TORCH
A25
NEXT
QUITENTER
Result: The new tool code is accepted and the following text is displayed:
CONNECTED TOOL: PRB 33--90 mm.
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NOTE! In the event a program with another tool code should already be stored in the
working area this must first be deleted. If you want to preserve the old program, don’t
forget to save it in the library by pressing the MEM key
.
The following information is displayed in the display:
S
ress
delete existing
program.
eso
WARNING!
TOOLTYPE MISMATCH
PROGRAM NO1
PROGRAM MADE FOR:PRB 17-- 49 mm
CONNECTED TOOL:PRB 33-- 90 mm
DELETE
PROG.
Result: The new tool code is accepted and the display displays: CONNECTED
TOOL: PRB 33 --90 mm.
If no figure is entered after PROGRAM NO: _ no welding program has been recalled
from the library.
Note! If the welding data in the working area is changed, the welding program will
not match the program recalled from the library. If you wish to keep the changes,
save them as a new welding program in the library.
4.3How to define your own tool code
To define your own tool code you might have to calculate some of the following
parameter factors:
ROTAT ION LENGTH, example A, see page 15.
SCALE FACTOR ROTATION, example B, see page 15.
SCALE FACTOR WIRE, example E, see page 16.
NB. The values set under self--defined tool codes remain even if you choose an
SEnter rotation length and scale factor. For correct values, see instruction manual
0440 100 xxx for PRD 160.
SPress the soft key quit.
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TOOLTYPEMISMATC
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program
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The following display comes up:
SPress the soft key
CHOOSE CONNECTED TOOL:
.
PRB
PRH
PRD"CUSTOMIZED
POC 60--170 mm
TIG HAND TORCH
A25
SETQUITENTER
Result: The new tool code was accepted and the text CONNECTED TOOL: PRD
comes up.
NB. If there is already a program with another tool code stored in the working area,
this program must be deleted. (If you want to preserve the program, save it in the
library by pressing the MEM key
.)
The following information is displayed in the display:
S
ress
delete existing
ram.
eso
.
WARNING!
TOO
PROGRAM NO1
PE MISMATCH
PROGRAM MADE FOR:PRB 17-- 49 mm
CONNECTED TOOL:PRD
DELETE
PROG.
Result: The new tool code was accepted and in the display the text CONNECTED
TOOL: PRD comes up.
Calculating and setting the rotation
length
ROTATION LENGTH= enter number of pulses / revolution (from start point 0.000 to
1.000)
Calculating and setting the scale
factor
Example B: PRH 6--40, rotation.
SMax rotation speed (V) = 2.778 rpm
SMechanical gear ratio of drive unit (N) = 2140:1
SValue for pulse generator signals per revolution of motor shaft (P) =15
SMax. adjustable rotation value (M) = 1000.
SThe time between the pulses from the pulse generator, indicated in
micro--seconds at the desired max. speed (the data can be found in the
specification of the drive unit used).
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p
p
factorSCALE
A
LEFA
GB
(T)=60s
x 1 000 000
VxNxP
SConstant (K) is to be indicated so that K/T = max. adjustable value in the display
(M). K = T x M = 672843
SCALE FACTOR = 672843
SStep to the following display, see example A, page 15.
SStep to parameter
FACTOR ROTATION
using the soft key
next.
INSERT PARAMETERS
DEFAULTPRDA 25PRB
ROTATIONS LENGTH55350
SCALE FACTOR ROT.672843
#
NEXTQUITENTER
SPress the soft key enter.
SEnter the value 672843 for the scale factor using the numerical keys.
SPress the soft key enter.
Result: The rotation scale factor has been set.
Prescaler
In this window you can choose to count all the pulses or only every eight pulses.
Choosing the latter alternative 8 pulses are counted as 1, so as to enable the use of
high frequency pulse generators (max. 2000 Hz).
INSERT PARAMETERS
SC
WEAVE -- pulses/mm.84
PRESCALER
SCALE FACTOR WIRE230826
SCALE FACTOR WEAVE119048
NEXTQUITENTER
CTORVOLT.30
Calculating and setting the wire feed scale factor
Example E: Wire feed unit MEI 21
SMax. wire feed speed (V) = 2500 mm/min
SMechanical gear box ratio (N) = 159:1
SEffective circumference of the feed rollers (O) ≈ (29.2 x π )mm
SValue for pulse generator signals per revolution of motor shaft (P) =15
SMax. adjustable wire feed speed x 10 (M) = 25.0 x 10 = 250.
SMotor speed corresponding to max. speed (R) = (V /O) x N rpm
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SThe time between the pulses from the pulse generator, indicated in
micro--seconds at the desired max. speed (the data can be found in the
specification of the drive unit used).
(T)=60s
x 1 000 000
RxPVxNxP
SThe constant (K) is to be indicated so that K/T = max. adjustable value in the
display, K = T x M = 230 779
SCALE FACTOR WIRE = 230 779
Enter the values for SCALE FACTOR WIRE F EED in the same way as in example B
on page 15.
4.4How to change languages
The different texts displayed on the control box are available in the following four
languages:
SEnglish, German, Franch, Swedish.
The following groups of languages are available as accessories (see instruction
manual for the respective power source).
=60xO
x 1 000 000
SEnglish, German, French, Swedish
SEnglish, Italian, Finnish, Norwegian
On delivery and after resetting the box, all texts displayed are in English.
Language
SPress the MODE key
selection
to get to the auxiliary functions, and the following
display comes up:
S
ress
language.
eso
AUXILIARY FUNCTIONS
LANGUAGE"
ERROR LOG"
SHOW ACTUAL PARAMETER VALUES
SOFTWARE UPGRADE"
SOFTWARE KEY"
LAN-GUAGE
ERROR
LOG
SHOW
PARA- METER
SOFT--.
WARE
UPGR.
SOFT-WARE
KEY
SPress the soft key next language and step to the desired language.
S
ress
change language.
eso
CHOSEN LANGUAGE: ENGLISH
AVAILABLE LANGUAGES
ENGLISHSVENSKA
DEUTSCH
FRANCAIS
NEXT
LANG
CHANGE
LANG
QUIT
Result: All texts will from now on be in the new language (in this example Swedish).
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S
erminateby
pressing the soft key
avbryt.
VALT SPRÅK: SVENSKA
TILLGÄNGLIGA SPRÅK
ENGLISHSVENSKA
DEUTSCH
FRANCAIS
NÄSTA
SPRÅK
BYT
SPRÅK
AVBRYT
SPress the MODE keyto return to the working area.
5PROGRAM EDITING
5.1Entering a parameter value
SMake sure the right group of parameters is displayed in the display by pressing
one of the five parameter keys.
SEnter a value in the digit box.
SPress the soft key of the desired parameter.
Note that the parameters always inherit the value from the previous sector if no
new value is entered.
5.2Increasing/decreasing a parameter value
The parameter value to be altered must be shown in the digit box.
SMark the desired parameter using one of the soft keys. The set value comes up
in the box.
SPress the PLUS
or the MINUS key.
5.3Creating a new sector
A new sector is created by entering a new breakpoint into an existing sector.
SEnter a new value for the breakpoint of the new sector.
SPress the SECTOR key.
In doing this, a new sector is created which is a copy of the original sector, but with
another breakpoint and another sector number. The new sector is automatically
positioned in the right place in the program. This is determined by the value of the
new breakpoint.
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Creating a new sector during welding
Proceed as follows to create a new sector during the welding:
SEnter a value into one of the following parameter groups using the numerical
keys:
SPress the corresponding soft key.
A new sector is now automatically created.
5.4Changing the breakpoint of a sector
Make sure the existing breakpoint value of the sector is displayed in the digit box.
SPress the SECTOR key
The breakpoint value is now shown in the digit box.
SEnter the new breakpoint value.
SPress the SECTOR key
or
SChange the breakpoint value using the PLUS key
.
or the MINUS key.
5.5Creating a transport sector
If you want to rotate the welding tool without welding within a sector, you can create
a transport sector. Sector 1 cannot function as a transport sector -- it can only
function as a delayed start.
Transpo rt sector
SEnter a value for the breakpoint of the new sector using the numerical keys.
SPress the SECTOR key.
SSet the WELDING CURRENT
NOTE! If the welding current value is inherited, the welding current value of the
following sector will also be 0. Don’t forget to change them to the right value.
All the other parameter values can remain.
Delayed start
Change the breakpoint of sector 1 in the following way in order to delay the start:
SPress the STEP key
SPress the SECTOR key.
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SEnter the breakpoint, for example 0.100 instead of 0.000, using the numerical
keys.
SPress the SECTOR key
again.
5.6Finding the home position
When the tube welding tools PRH and POC are used, it can sometimes be
necessary to return to the home position (start position), for example in the event of
a welding stop.
SRotate the tool manually till it is within a tenth of a rotation to the left or right of
the home position. See also under the section “Manual Mode” on page 37.
SPress the START key
Once this is done, the welding tool automatically starts rotating to the home position,
and a welding sequence starts.
.
5.7Entering a slope
A time slope or a sector slope can be indicated for the following parameter groups:
Welding currentRotation speed
Wire feed speed
Time slope
SPress the key for the parameter group in question.
SMark the desired parameter using one of the soft keys.
SEnter the desired slope time value.
SPress the SLOPE key
Sector slope
To create a sector slope no time value is to be entered. A sector slope always goes
on from one breakpoint to the next one.
NOTE! In the Welding Current parameter group you cannot indicate a sector slope
when preheating is involved.
SPress the key for the parameter group in question.
.
SMark the desired parameter using one of the soft keys.
SPress the SHIFT key
slope is created.
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Whatisaslope?
A slope is a linear change between two parameter values, based on time or position
(breakpoint).
A time--based slope (time slope) is active during the time indicated.
A position--based slope (sector slope) is active between two adjacent breakpoints.
5.8Moving within a program
Move to the next parameter group
Using the STEP key
using the STEP function, only the parameter groups that have been assigned a
value are displayed.
When stepping through the end sector, you will automatically jump to the tool code.
Move between
By entering a sector number in the digit box in the display and then pressing the
SECTOR key
When jumping to a new sector you always end up in the same group of parameters
as the one you left.
sectors
it is possible to jump between the different sectors of the program.
you can step through the whole welding program. When
5.9Deleting in a program
Delete a parameter value
You can delete a parameter value if it has not been borrowed from a previous sector.
For the value to be deleted, it must be displayed in the digit box.
SPress the DELETE key
. The digit box asks DEL?
SPress the soft key of the parameter to confirm.
Delete a
You can only delete the sector in which you are at the moment. It can be done in two
different ways:
Alternative 1
SPress the DELETE keyand then the SECTOR key.
Alternative 2
SPress the SECTOR key. The breakpoint of the sector comes up in the digit
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SPress the DELETE key. The digit box asks DEL?
SPress the SECTOR key
Delete the contents of the working
The working area always contains the welding program last used. Maybe you want
to clear the working area completely, for example to change the tool code.
Delete a program in the working area in the following way:
SPress the DELETE key
to confirm.
area
and then the MEMORY key.
5.10Changing weld data during welding
To change welding data in the course of welding, a value must be displayed in the
digit box.
SMark the parameter in question using one of the soft keys. The set value now
comes up in the digit box.
SEnter the new value using the numerical keys, or increase/decrease the value
using the PLUS
NOTE! When a value is changed in the working area, the old value will be
overwritten and the new one applies. If the value is inherited, the value in the
following sector will also be changed.
/ MINUSkeys.
5.11Zeroing the control box
In the event the control box should get blocked, i.e. it does not react when the keys
are activated, it is necessary to reset the box. This is done in the following way:
SSet the mains voltage switch on the power source to 0.
SHold down the mid one of the five soft keys on the control box, and turn the
mains voltage switch to position 1.
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6PROGRAMMING EXAMPLES
6.1Example 1a:
The first example is a simple welding program, consisting of two sectors, sector 2
being a stop sector. The program contains four parameters: weld ing current,
rotation, weld gas preflow and weld gas postflow.
Sector 1Sector 2
Breakpoint0.0001.010
Welding current (continuous) (A)1600
Rotation (continuous) (‰)250250
Gas preflow (weld gas) (s)5
Gas postflow (weld gas) (s)7
Sector 1
Breakpoint
Sector 1 automatically is assigned the breakpoint 0.000, if nothing else is indicated.
Welding current
Pulse current = 160 A
SPress the key for WELDING CURRENT
. The picture for welding current
settings comes u p in the display.
SEnter the value 160 using the numerical keys.
S
ress
continuous peak
pulse current.
eso
SECTOR1(1)0.000
PEAK CURRENTA
BACKG. CURRENTA
PEAK TIMEs
BACKGR.TIMEs
CONT/
PEAK
CURR.
BACKGR.
CURR.
PEAK
TIME
160
BACKGR
TIME
Result: PEAK CURRENT = 160 A in sector 1.
Rotation speed
Continuous rotation forward = 250 ‰ of the max. rotation speed.