REHM FOCUS.ARC P Series How to use

REHM SCHWEISSTECHNIK
FOCUS.ARC P and S
MEGA.ARC P and S
Short Manual
This short manual does not substitute the original operator manual.
Please read this document carefully before your start operating the welding power source.
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This models of welding power sources have been developed according to the
generally recognized rules of technology. Nevertheless, their use can lead to a
risk for life and limb of the user or third parties or might lead to damages of the
system or other property. You should therefore read this document completely
and thoroughly before starting up the welding machine.
• Safety and warning notices are used for occupational safety and accident
prevention.
They must be observed. Not only the general safety instructions listed here
must be
observed but also the safety and warning information in the original manual.
• In addition to the information in these brief instructions, the general safety and
accident prevention regulations have to be considered. They di󰀨er from
country to
country (German: UVV BGV A3, TRBS 2131, BGR 500 Chapter 2.26 „Wel-
ding, cutting
and allied processes“). In addition the specic regulations for welding are
relevant.
• Please notify also the safety information signs in this document.
• As a matter of principle, no safety devices may be dismantled or put out of
operation,
as this poses a risk and the intended use of the system is no longer guaran-
teed.
Dismantling of safety devices when setting up, repairing and maintaining is
specially
described. The safety devices must be reassembled immediately after this
work has
been completed.
• Changes to the system, the attachment or installation of additional equipment
and
external the use of safety devices is not permitted. This invalidates the
guarantee and
the reliability claim.
• If external agents are used (e.g. solvents for cleaning), the operator of the
system must
guarantee the safety of the system during use.
• Except when this is expressly stated in writing by REHM, REHM welding
systems are
only intended for sale to commercial / industrial users and only for their use.
The MIG/MAG welding systems are designed according to EN 60974-1 arc
welding equipment - welding power sources for overvoltage category III and
pollution degree 3 and according to EN 60974-10 arc welding equipment - elec-
tromagnetic compatibility (EMC) for group 2 class A and are suitable for use in all
areas , except residential areas that are directly connected to a public low-voltage
supply system. Both conducted and radiated interference can make it di󰀩cult to
1 Safety Instructions

ensure electromagnetic compatibility in these areas. For this purpose, the observance
of suitable measures to meet the requirements (lters for mains connection, shielding
such as the use of shielded lines, welding lines that are as short as possible, earthing
of the workpiece, equipotential bonding) as well as the assessment of the environment
(such as computers, control equipment, sound and television broadcast transmitters,
neighboring Persons, e.g. when using a pacemaker). The user is responsible for faults.
Qualication of the operating personnel
REHM welding systems may only be used by persons who are trained in the use,
operating and maintenance of the welding systems.
Only qualied, authorized and instructed personnel may work on and with the systems.

Symbols and sign at the welding machine or system
Attention - danger or damage
Attention - high voltage
Disregarding might cause injure or dead.
Personal protective equipment (PPE)
Personal protective equipment (PPE) is mandatory when working with a welding
system:
• Welding protection lter, protection level 10-15
• Protective shield, screen or hood
• Welding gloves
• Leather apron
The company is obliged to provide the operator with the necessary PPE.
Intended Use
The MIG / MAG welding systems are only to be used
• for MIG / MAG or manual electrode welding for hand-guided and machine-guided
operation (see original operating instructions)
• for welding metallic materials (such as steels, copper, titanium and aluminum)
• in a perfectly safe condition
Environmental conditions
• Temperature range of the ambient air:
- In operation: -10 ° C to + 40 ° C (14 ° F to 104 ° F)
- During transport and storage: -20 ° C to + 55 ° C (-4 ° F to 131 ° F)
• Relative humidity
- up to 50% at 40 ° C (104 ° F)
- up to 90% at 20 ° C (68 ° F)
• Ambient air:

2 Device structure and connectors
Compact machine power source with sepated (S) wire feeder unit
Rear of Compact machine
Separate wire feeder unit

Nr. Details
1 7 "screen (no touch)
2 Turn / push control element (Encoder)
3 Central adapter (ZA) for torch connection (Euro connection)
4 7-pin torch socket
5Burner cooling water connection ow
6 Burner cooling water connection return
7 Main switch
8 Power socket welding circuit ground (-)
9 Power socket welding circuit plus (+) for MMA welding
10 Cooling air inlet grille
11 Cooling water ller neck screw cap
12 Window level coolant
13 Crane eyes on the trolley
14 Option: not installed
15 Shielding gas connection for welding torch
16 Mains cable CEKON 16 / 32A - 4 wire connection
17 Feed range on the compact machine
18 optional water cooling device (only types with a W after the designati-
on)
19 Cooling air outlet openings (caution temperatures up to + 60 ° C)
20 Spool mandrel for holding the wire roll
21 4 rolls of wire feed unit in standard 2 driven
22 Gas test push button - for this parameter in the SETUP menu [BF22]
23 Threading pushbutton - for this parameters in the MSP parameter
menu [BF20]

3 User interface (UI) description
Controls Functionality
BF1 BF2
BF5
BF4
BF3 AF5
AF1
BF10BF9
BF8
BF7
BF6
AF4 AF3
AF2
Display: Indication and Adjustment eld BF1...BF10
Display: Total Overview
BF11 Submenu button
BF12 Home button
BF13 Return button
Corner Menu‘s:
BF14 left top corner
BF15 right top corner
BF16 right bottom
corner
BF17 left bottom corner
BF18 push-/turn button
- Move Cursor
- conrm selecti-
on

Nr. Symbol Description / Functionality
BF1 Corner Menu - Welding Method
MIG/MAG welding
MIG/MAG welding by hand - Manual mode
Stick welding
BF2 Corner Menu - Operating Mode
2-Tact (2 step mode)
2-Tact with ramp down
4-Tact (4 step mode)
4-Tact with ramp down
Dot welding
Dot welding with ramp down
2-Tact Interval with/without ramp down
4-Tact Interval with/without ramp down

Nr. Symbol Description / Functionality
BF3 Corner Menu - Welding characteristic
Adjustment of material, wire diameter, gas, process
and variant of welding characteristic
BF4 Corner Menu - Welding Process
Power.Arc
Focus.Arcs
Power.Puls
Focus.Puls
Focus.Root
Root
BF5 Indicate and adjust - welding current
BF6 Indication of arc voltage
Indicate and adjust in method MIG/MAG
Hand
BF7 Indicate and adjust - Thickness of meteri-
al[mm]
BF8 Indicate and adjust - Wire feeder speed[m/
min]
BF9 Indicate and adjust - SDI
BF10 Indicate and adjust - Arc length correction
BF11 Button to operate submenu

Nr. Symbol Description / Functionality
BF19 MIG/MAG Parameter
Parameter value view from left to right side in the gure
Gas pre-ow time [0...20.0sec]
Wire insert speed [0...99%] als Prozent des eingestellten VD
Ignition current [50...200%] Startstrom als Prozent von ISchweißen
Ignition LBL correction [-9.9...+9.9V] Korrekturwert Lichtbogenlänge
Time Ignition current [0...5.0sec]
Current I1[0...5.0sec] Absenkzeit IHotstart nach ISchweißen
SDI I1[-5.0...+5.0]
LBL-correction I1[-9.9...+9.9V]
Pulse time t1
[0.05...5.00sec] graue Felder, nur wenn Doppel-
pulsen im SETUP Menü aktiviert ist
Double pulse amplitude [20...180%]
bei Strom I1=100A und Amp=50% ist der Puls=125 zu 75A
SDI I2[-5.0...+5.0]
LBL-correction I2[-9.9...+9.9V]
Pulse time t2[0.05...5.00sec]
Anti Stick [-30...+30]
Gas post-ow time [0...20.0sec]

Nr. Symbol Description / Functionality
BF21 Job Memory
The 12 Job short activate buttons are no longer
available in that Version.
Menu „Job Memory“
allows to manage 500
Jobs.
You get into Submenu „Job Menmory“ by
pushing rotary encoder for 3 sec
go down by menu structure
Create Folder
It is only possible to to save Jobs in a folder.
Move cursor to postion „Create Folder“ => Conrm
by pushing rotary encoder => insert name with
keyboard on the screen => Conrm
Rename Folder
Place cursor on the selected folder => press
„Edit“=>
insert new name = Conrm
Move Folder
Place cursor on the selected folder => „Edit“ =>
Select „Move Folder“ => Move selected folder to his
destination => Conrm
Erase Folder Erase only empty folders - erase Jobs before
Load Job
Place cursor on the selected Job in a folder =>
Conrm „Load Job“.
The screen with green corner menu shows „Job
Preview“ You might check parameter settings and
selected welding characteristic before pressing
„Load“ or „Back“

Nr. Symbol Description / Functionality
BF21 Job Memory
Load Job
By using „Load function“ screen jumps back to main
screen. The active Job is shown in a green area in
the center of the screen. You choose „Job forward“
or „Job backward“ by turning the encoder to the
position in the picture above „Job 1“ or „Job 8“ and
conrm by pushing the encoder.
The active elds „Current“, „Material“, „VD“, „LBL“
and „SDI“ are adjustable if there is no lock function
(key switch) active.
Copy Job
JSelect „Copy Job“ => conrm => place cursor on
the job to be copied => conrm (Job is now in the
copy bu󰀨er) => place cursor on the new position =>
press „Insert Job“ => conrm
Insert Job Inserts a Job out of the copy bu󰀨er at the marked
position.
Rename Job Select Job to be renamed => conrm => insert new
name with the keyboard on the screen => conrm
Move Job Like „Copy Job“, but with direct move to new place

Nr. Symbol Description / Functionality
BF22 Setup
Setup Parameter Adjust-
ment
Description
Double Pulse On / OFF Switch function on / o󰀨
Shut down to Standby 0
time [min]
Function o󰀨
Shut down after time (t)
Select color schema Bright/Dark
Time test gas ow time [sec] Time gas ows if button is pressed
HOLD Function Inactive
Active
Active for dt
HOLD = Indictes the latest welding
values when torch button is released
Time HOLD active time [sec]
Mode of LBL correction U <=> dV leading value is voltage or wire
speed
Adjustment of welding
circuit manually 1
L [µH] Inductivity of welding circuit. Value in
µHenry (typ.: 17 µH)
Adjustment of welding
circuit manually 2
R [mΩ] Impedance of welding circuit. Value
in in Milliohm.
Adjustment of welding
circuit automatic
With activating atomatic adjustment
one time L and R are measured and
stored.
Up/Down Torch active/
inactive

Nr. Symbol Despriction / Functionality
BF22 Setup
Setup Parameter Adjust-
ment
Desription
Factory Settings All values in the „Setup“ menu will
be set to factory default values.
Jobs are not included and stay
unchanged!

Nr. Symbol Description / Functionality
BF23 Assist (until now not available)
BF24 Language settings
Currently available languages:
German
UK
Spain
France
Hungaria
Italy
Poland
Serbia
Romania
Russia
Turkey
Chinese
AF1 Indication eld 1 - general use
AF2 Indicates active welding characteristic
AF3 Indication eld 2 - general use
AF4 Indicates active welding arc if color is black; no
signal means no arc established
Indicates overtemperature of power unit
wait until sign is switched o󰀨; fans stay active
AF5 WLan aktive Symbol
Machine is active in the WLAN Network.

4 MIG/MAG Manually Mode
Symbol Description / Functionality
Get in by corner menu BF1 „Welding Method“, choose „MSG
Manuell“.
Get out by BF3 „Welding Characteristic“, choose a di󰀨erent
characteristic.
Screen in this mode. Changable values are voltage and wire
feeding speed.
It is poissible to save the manual settings in a JOB. After it is
possible to handle the Job like describted before.

5 Stick Welding MMA
Symbol Description / Functionality
Get in by BF1 „Welding Method“ - choose „MMA“
Get out by über BF1 „Welding Method“ - choose any other
method.
Settings (Parameter) in the picture above from left to right:
All values for increase of output current Iout an the welding current I1are
limited by the power class of the inverter (250A, ..., 450A).
Hotstart [10...200%] from setpoint of current I1 - ignition current
Formula: Current Iout = Current I1x Percentage/100
Time
Hotstart
[[0,1...10.0sec]
Current I1[40...450A]
Arc-Force [0 ... 300%] of the output current to stabalize the arc.
Formula: Current Iout = Current I1+ (Current I1x Percenta-
ge/100)

6 Machine Types and Functionality
FAP FAS MAP MAS
Welding Method
Mig/Mag √√√√
Mig/Mag Manually √√√√
MMA √√√√
Operation Mode
2-Tact √√√√
2-Tact with ramp down √√√√
4-Tact √√√√
4-Tact with ramp down √√√√
2-Tact Dot welding √√√√
2-Tact Dot with ramp down √√√√
2-Tact Interval √√√√
2-Tact Interval with ramp down √√√√
4-Tact Interval √√√√
4-Tact Interval with ramp down √√√√
Process
Power.Arc √√√√
Focus.Arc √√√√
Power.Pulse √ √
Focus.Pulse √
Focus.Root √√√√
Menu
MSG Parameter √√√√
Job Memory 500 √√√√
Setup √√√√
Languages √√√√
Setup
Double Pulse √ √
Double Pulse: Slope T1/T2 √ √
Color Schema √√√√
Gas Test: Time √√√√

FAP FAS MAP MAS
Setup
Hold Mode √√√√
Hold time √√√√
Type of LBL-Correction √√√√
Welding circuit adjustment: Automatic √√√√
Welding circuit adjustment: : Inductivity √√√√
Welding circuit adjustment: : Impedan-
ce √√√√
Up/Down: Standby mode √√√√
Up/Down: Welding mode √√√√
Up/Down: Speed √√√√
factory settings √√√√
WiFi: Aktive √ √ Option Option
WiFi: Channel √ √ Option Option

7 Updates
FAP FAS MAP MAS
Update per USB-Stick (since
15.1.2021) √√√√
Update per Smartphone APP √ √
Update per USB Stick
General All welding machines of this model series can be updated.
The update les have the following names and could be used for
all power classes:
TYP_250-450A_BDE-V01_00_47_32.
extension
Software User inteface (BDE)
TYP_250-450A_ST-V01_02_00_00.
extension
Software der Process Controller
(ST)
TYP_250-450_MK-V01_00_00_00.
extension
Software der Motor Controller
(MK)
TYP_250-450_KNG-V01_00_09_00.
extension
Set of welding characteristics