EWM Pico 300 cel SVRD Operating Instructions Manual

EWM

HIGHTEC WELDING GmbH

Dr. Günter - Henle - Straße 8 • D-56271 Mündersbach

Phone: +49 2680 181 0 • Fax: +49 2680 181 244

www.ewm.de • info@ewm.de

GB

Operating instructions

Welding machines for MMA welding

PICO 230

PICO 230 CEL

PICO 260

PICO 260 CEL

PICO 260 CEL PWS

PICO 300

PICO 300 CEL

PICO 300 CEL PWS

N. B. These operating instructions must be read before commissioning.

Failure to do so may be dangerous.

Machines may only be operated by personnel who are familiar with the appropriate safety

regulations.

The machines bear the conformity mark and thus comply with the

• EC Low Voltage Directive (2006/95/ EG)

• EC EMC Directive (2004/108/ EG)

In compliance with IEC 60974, EN 60974, VDE 0544 the machines can be used in environments

with an increased electrical hazard.

Item No.: 099-002032-EWM01

Revised: 28.03.2007

Dear customer,

Congratulations! You have chosen a quality product from EWM HIGHTEC WELDING GmbH.

EWM machines provide results of the highest perfection thanks to their PREMIUM quality. Therefore

we are happy to provide you with a full 3-year warranty according to our operating instructions.

We develop and produce quality! From individual components to the final product, we retain sole

responsibility for our machines.

In all their high-tech components, our welding machines embody future-oriented advanced technology

at the utmost level of quality. Each of our products is carefully checked; we guarantee that the material

and processing of our products is faultless.

These operating instructions contain everything about commissioning the machine, notes regarding

safety, maintenance and care, technical data as well as information regarding the warranty. Please

heed all these notes to ensure many years of safe operation of the machine.

Thank you for the trust that you have placed in us. We look forward to a long-term partnership with you

in the spirit of “ONCE EWM – ALWAYS EWM”.

Yours sincerely,

EWM HIGHTEC WELDING GmbH

Bernd Szczesny

Executive management

Machine and Company Data

Please enter the EWM machine data and your company’s data in the appropriate fields.

CE

EWM HIGHTEC WELDING GMBH

D-56271 MÜNDERSBACH

TYP:

ART:

SNR:

PROJ:

GEPRÜFT/CONTROL:

Name of Customer / company

Adress

Post code / Place

Country

Stamp / Signature of EWM-distibutor

Date of purchase

Name of Customer / company

Adress

Post code / Place

Country

Stamp / Signature of EWM-distibutor

Date of purchase

3

Contents

For your safety

4 Item No.: 099-002032-EWM01

1 Contents

1 Contents..................................................................................................................................................4

2 Safety instructions.................................................................................................................................6

2.1 For your safety...............................................................................................................................6

2.2 Transport and installation...............................................................................................................8

2.2.1 Ambient conditions .........................................................................................................8

2.3 Notes on the use of these operating instructions...........................................................................9

3 Technical data.......................................................................................................................................10

3.1 PICO 230; 230 CEL .....................................................................................................................10

3.2 PICO 260; 260 CEL; 260 CEL PWS............................................................................................11

3.3 PICO 300; 300 CEL; 300 CEL PWS............................................................................................12

4 Machine description.............................................................................................................................13

4.1.1 PICO 230; 260; 300; PICO 230; 260; 300 CEL............................................................13

4.1.2 Front view.....................................................................................................................13

4.1.3 Rear view......................................................................................................................14

4.2 PICO 260; 300 CEL PWS............................................................................................................15

4.2.1 Front view.....................................................................................................................15

4.2.2 Rear view......................................................................................................................16

5 Functional characteristics...................................................................................................................17

5.1 Machine control – Operating elements........................................................................................17

5.2 Welding data display....................................................................................................................18

5.3 MMA welding................................................................................................................................18

5.3.1 Selecting MMA welding ................................................................................................18

5.3.2 Selecting the electrode type – Arcforce (welding characteristics)................................18

5.3.2.1 Electrode type allocation...............................................................................19

5.3.3 Selecting hotstart..........................................................................................................19

5.3.4 Antistick.........................................................................................................................20

5.4 TIG welding..................................................................................................................................20

5.4.1 TIG welding selection ...................................................................................................20

5.4.2 TIG arc ignition .............................................................................................................21

5.5 Remote control.............................................................................................................................21

5.5.1 Manual remote control RT 1.........................................................................................21

5.5.2 Foot-operated remote control RTF 1............................................................................21

5.5.3 Manual remote control RT PWS 1................................................................................21

5.6 Advanced settings (MMA welding)...............................................................................................22

5.6.1 Arcforce correction (welding characteristics)................................................................22

5.6.2 Arc length restriction (USP)..........................................................................................23

5.6.3 VRD open circuit voltage reduction (optional)..............................................................23

6 Commissioning.....................................................................................................................................24

6.1 General.........................................................................................................................................24

6.2 Area of application – proper usage..............................................................................................24

6.3 Installation....................................................................................................................................24

6.3.1 Dirt filter.........................................................................................................................25

6.4 Mains connection.........................................................................................................................25

6.5 Machine cooling...........................................................................................................................25

6.6 Workpiece lead, general ..............................................................................................................25

6.7 MMA welding................................................................................................................................26

6.7.1 PICO 230; 260; 300; PICO 230; 260; 300 CEL............................................................26

6.7.1.1 Electrode holder connection..........................................................................26

6.7.1.2 Connection for workpiece lead......................................................................26

6.8 PICO 260; 300 CEL PWS............................................................................................................27

6.8.1.1 Pole reversal changeover switch ..................................................................27

6.8.1.2 Electrode holder connection..........................................................................28

6.8.1.3 Connection for workpiece lead......................................................................28

Contents

For your safety

Item No.: 099-002032-EWM01 5

6.9

TIG welding..................................................................................................................................28

6.9.1 Connecting a TIG welding torch with rotating gas valve..............................................28

6.9.2 Shielding gas supply (shielding gas cylinder for welding machine).............................28

6.9.3 Connection for workpiece lead.....................................................................................29

7 Maintenance and care..........................................................................................................................30

7.1 General........................................................................................................................................30

7.2 Cleaning.......................................................................................................................................30

7.3 Repetition test..............................................................................................................................30

7.3.1 Test intervals and scope ..............................................................................................31

7.3.2 Documentation of the test ............................................................................................31

7.3.3 Visual inspection...........................................................................................................31

7.3.4 Measurement of protective conductor resistance ........................................................31

7.3.5 Measurement of insulation resistance..........................................................................32

7.3.6 Measuring the leakage current (protective conductor and contact current).................32

7.3.7 Measuring the open circuit voltage...............................................................................32

7.3.8 Function test of the welding machine...........................................................................32

7.4 Repair Work.................................................................................................................................33

7.5 Disposing of equipment...............................................................................................................34

7.5.1 Manufacturer's declaration to the end user..................................................................34

7.6 Meeting the requirements of RoHS .............................................................................................34

8 3-Year Warranty....................................................................................................................................35

8.1 General Validity............................................................................................................................35

8.2 Warranty Declaration...................................................................................................................36

9 Operating problems, causes and remedies ......................................................................................37

9.1 Error messages (power source) ..................................................................................................37

10 Spare parts list .....................................................................................................................................38

10.1 PICO 230; 230 CEL.....................................................................................................................38

10.1.1 Front view.....................................................................................................................38

10.1.2 Rear view......................................................................................................................39

10.1.3 Left-hand side...............................................................................................................40

10.1.4 Right-hand side ............................................................................................................41

10.2 PICO 260; 260 CEL; 260 CEL PWS............................................................................................42

11 Accessories, options...........................................................................................................................43

11.1 Remote control / connection cable ..............................................................................................43

11.2 Electrode holder / workpiece lead................................................................................................43

11.3 TIG welding torch.........................................................................................................................43

11.4 Options.........................................................................................................................................43

11.5 General accessories....................................................................................................................43

12 Circuit diagrams...................................................................................................................................44

12.1 PICO 230.....................................................................................................................................44

12.2 PICO 230 CEL.............................................................................................................................45

12.3 PICO 260.....................................................................................................................................46

12.4 PICO 260 CEL.............................................................................................................................47

12.5 PICO 260 CEL PWS....................................................................................................................48

12.6 PICO 300.....................................................................................................................................49

12.7 PICO 300 CEL.............................................................................................................................50

12.8 PICO 300 CEL PWS....................................................................................................................51

13 Appendix A ...........................................................................................................................................52

13.1 Declaration of Conformity ............................................................................................................52

Safety instructions

For your safety

6 Item No.: 099-002032-EWM01

2 Safety instructions

2.1 For your safety

Observe accident prevention regulations!

Ignoring the following safety procedures can be fatal!

Proper usage

This machine has been manufactured according to the latest developments in technology and

current regulations and standards. It is to be operated only for the use for which it was designed

(see chapter Commissioning/Area of application).

Improper usage

However, this machine may be a hazard to persons, animals and property if it is

• not used as directed

• used by unskilled persons who have not been trained

• modified or converted improperly

Our operating instructions will provide you with an introduction into the safe use of the machine.

Therefore please read them carefully and only start work when you are familiar with them.

Any person involved in the operation, maintenance and repair of this machine must read and

follow these operating instructions, especially the safety precautions. Where appropriate, this

should be confirmed by signature.

Furthermore, the

• relevant accident prevention regulations,

• generally accepted safety regulations,

• local regulations, etc. must be observed.

Before undertaking welding tasks, put on prescribed dry protective clothing, e.g. gloves.

• Protect eyes and face with protective visor.

Electric shocks can be fatal!

• Do not touch any live parts in or on the machine!

• The machine may only be connected to correctly earthed sockets.

• Only operate with intact connection lead including protective conductor and safety plug.

• An improperly repaired plug or damaged mains cable insulation can cause electric shocks.

• The machine may only be opened by qualified and authorised specialist staff.

• Disconnect from the mains before opening. Switching off is not sufficient. Wait for 2 minutes until the

capacitors have discharged.

• Always put down welding torch, stick electrode holder in an insulated condition.

• The machine must not be used to defrost pipes!

Even touching low voltages can cause you to get a shock and lead to accidents, so:

• Protect yourself from falling before working on platforms or scaffolding.

• During welding ensure that you operate earth tongs, torch and workpiece correctly, and not in ways for

which they are not intended. Do not touch live parts with bare skin.

• Only replace electrodes when wearing dry gloves.

• Never use torches or earth cables with damaged insulation.

Smoke and gases can lead to breathing difficulties and poisoning.

• Do not breathe in smoke and gases.

• Ensure that there is sufficient fresh air.

• Keep solvent vapours away from the arc radiation area. Chlorinated hydrocarbon fumes can be

converted into poisonous phosgene by ultraviolet radiation.

Safety instructions

For your safety

Item No.: 099-002032-EWM01 7

Workpiece, flying sparks and droplets are hot!

• Keep children and animals well away from the working area. Their behaviour is unpredictable.

• Move containers with inflammable or explosive liquids away from the working area. There is a danger

of fire and explosion.

• Never heat explosive liquids, dusts or gases by welding or cutting. There is also a danger of

explosions when apparently harmless substances develop high pressures in enclosed containers by

heating.

Take care to avoid fire hazards

• Any kind of fire hazards must be avoided. Flames can form e.g. when sparks are flying, when parts

are glowing or hot slag is present.

• A constant check must be kept on whether fire hazards have arisen in the working area.

• Highly inflammable objects, such as matches and cigarette lighters for example, must not be carried in

trouser pockets.

• You must ensure that fire extinguishing equipment - appropriate for the welding process - is available

close to the welding work area and that this equipment can be accessed easily.

• Containers in which fuels or lubricants have been present must be thoroughly cleaned before welding

begins. It is not sufficient simply for the receptacle to be empty.

• After a workpiece has been welded, it must only be touched or brought into contact with inflammable

material when it has cooled down sufficiently.

• Loose welding connections can completely destroy protective conductor systems of interior

installations and cause fires. Before beginning welding work, ensure that the earth tongs are properly

fixed to the workpiece or welding bench and that there is a direct electrical connection from the

workpiece to the power source.

Noise exceeding 70 dBA can cause permanent hearing damage!

• Wear suitable earmuffs or plugs.

• Ensure that other people who spend time in the working area are not inconvenienced by the noise.

Interference by electrical and electromagnetic fields is possible e.g. from the welding machine or

from the high-voltage pulses of the ignition unit.

• As laid down in Electromagnetic Compatibility Standard EN 50199, the machines are intended for use

in industrial areas; if they are operated in residential environments, for example, problems may occur

in ensuring electromagnetic compatibility.

• The functioning of heart pacemakers can be adversely affected when you are standing near the

welding machine.

• It is possible that electronic equipment (e.g. EDP, CNC equipment) in the vicinity of the welding site

could malfunction.

• Other mains supply leads, control leads, signal and telecommunications leads above, under and near

the welding device may be subject to interference.

Electromagnetic interference must be reduced to a level that no longer constitutes interference.

Possible reduction measures:

• Welding machines must be serviced regularly. (see Chap. Maintenance and care)

• Welding leads should be as short as possible and run closely together on or near to the ground.

• Selective shielding of other leads and equipment in the environment can reduce radiation.

Repair and modifications may only carried out by authorised, trained, specialist staff.

The warranty becomes null and void in the event of unauthorised interference.

Safety instructions

Transport and installation

8 Item No.: 099-002032-EWM01

2.2 Transport and installation

The machines may only be transported and operated in an upright position.

Before carrying away or moving, pull out mains plug and place on the machine.

When setting up the machine, resistance to tilting is only guaranteed up to an angle of 10°

(as specified in EN 60974-1).

Secure the gas cylinder!

• Place shielding gas cylinders in the holders provided for them and secure with safety chains.

• Take care when handling cylinders; do not throw or heat, guard against them toppling over.

• When moving by crane, take off the gas cylinder from the welding machine.

2.2.1 Ambient conditions

This machine must not be operated in any area where any risk of explosion exists.

The following conditions must be observed during operation:

Temperature range of the ambient air

• During welding: -10°C to +40°C *),

• For transport and storage: -25°C to +55°C *)

*) Using the appropriate coolant.

Relative air humidity

• up to 50% at 40°C

• up to 90% at 20°C

The ambient air must be free of unusual amounts of dust, acids, corrosive gases or substances, etc.,

assuming these are not produced by the welding process.

Examples of unusual operating conditions:

• unusual corrosive smoke,

• vapour,

• excessive oil vapour,

• unusual vibrations or jolts,

• excessive quantities of dust such as grinding dust etc.,

• severe weather conditions,

• unusual conditions near the coast or on board ship.

When setting up the machine, ensure a free inlet and outlet of air.

The machine is tested to protection class IP23, i.e.:

• Protection against penetration of solid foreign bodies ∅ > 12mm,

• Protection against water spray up to an angle of 60° to the vertical.

Safety instructions

Notes on the use of these operating instructions

Item No.: 099-002032-EWM01 9

2.3 Notes on the use of these operating instructions

These operating instructions are arranged into chapters.

To help you find your way around more quickly, in the margins you will occasionally see symbols along

with the sub-headings. These symbols refer to particularly important passages of text which are graded

as follows depending on their importance:

Please note:

Technical features which users must observe.

Warning:

Working and operating procedures which must be followed precisely to avoid damaging or

destroying the machine.

Caution:

Working and operating procedures which must be followed precisely to avoid risk to persons and

includes the "Warning" symbol.

Instructions and lists detailing step-by-step actions in given situations can be recognised by bullet points,

e.g.:

• Insert the welding current lead socket into the relevant socket and lock.

Symbol Description

Press

Do not press

Turn

Switch

Technical data

PICO 230; 230 CEL

10 Item No.: 099-002032-EWM01

3 Technical data

3.1 PICO 230; 230 CEL

PICO range 230 / 230 CEL

Setting range:

TIG

electrode

10 A / 10.4 V to 260 A / 20.4 V

10 A / 20.4 V to 230 A / 29.2 V

MMA operating time

20°C 40°C

40%

50%

55%

60%

100%

-

230 A

220 A

180 A

230 A

-

200 A

150 A

TIG operating time

20°C 40°C

40%

50%

60%

100%

-

260 A

240 A

200 A

260 A

-

210 A

160 A

Load alternation

10min (60% DC ∧ 6 min welding, 4min break)

MMA open circuit voltage

99 V

MMA open circuit voltage with VRD

option

12 V

TIG open circuit voltage

12 V

Mains voltage (tolerances)

3x400 V (+ 20 % to – 25 % )

3x415 V (+ 15 % to – 25 % )

Frequency

50/60 Hz

Mains fuse (safety fuse, slow-blow)

16 A

Mains connection lead

H07RN-F4G1.5

Max. connected power

10.1 kVA

Recommended generator rating

13.7 kVA

cosϕ at Imax / efficiency

0,99 / 88%

Insulation class / protection

classification

H / IP 23

Ambient temperature

-10 °-C to +40°C

Machine cooling / torch cooling

Fan / Gas

Workpiece lead

35 mm2

Dimensions L/W/H

490 x 186 x 350 mm

Weight

16.5 kg

Constructed to standards

EN 60974 / IEC 60974 / VDE 0544

EN 50199 / VDE 0544 Part 206

/

Technical data

PICO 260; 260 CEL; 260 CEL PWS

Item No.: 099-002032-EWM01 11

3.2 PICO 260; 260 CEL; 260 CEL PWS

PICO range 260; 260 CEL; 260CEL PWS

Setting range:

TIG

electrode

10 A / 10.4 V to 260 A / 20.4 V

10 A / 20.4 V to 260 A / 30.4 V

MMA operating time

20°C 40°C

40%

50%

60%

100%

-

260 A

250 A

190 A

260 A

-

220 A

170 A

TIG operating time

20°C 40°C

50%

60%

100%

-

260 A

200 A

260 A

240 A

190 A

Load alternation

10min (60% DC ∧ 6 min welding, 4min break)

MMA open circuit voltage

99 V

MMA open circuit voltage with VRD

option

12 V

TIG open circuit voltage

12 V

Mains voltage (tolerances)

3x400 V (+ 20 % to – 25 % )

3x415 V (+ 15 % to – 25 % )

Frequency

50/60 Hz

Mains fuse (safety fuse, slow-blow)

16 A

Mains connection lead

H07RN-F4G1.5

Max. connected power

11.8 kVA

Recommended generator rating

16.0 kVA

cosϕ at Imax / efficiency

0,99 / 88%

Insulation class / protection

classification

H / IP 23

Ambient temperature

-10 °-C to +40 °C

Machine cooling / torch cooling

Fan / Gas

Workpiece lead

35 qmm

Dimensions L/W/H

490 x 186 x 350 mm;

490 x 186 x 445 mm (260CEL PWS)

Weight

16.5 kg;

23.5 kg (260CEL PWS)

Constructed to standards

EN 60974 / IEC 60974 / VDE 0544

EN 50199 / VDE 0544 Part 206

/

Technical data

PICO 300; 300 CEL; 300 CEL PWS

12 Item No.: 099-002032-EWM01

3.3 PICO 300; 300 CEL; 300 CEL PWS

PICO range 300; 300 CEL; 300 CEL PWS

Setting range:

TIG

electrode

10 A / 10.4 V to 260 A / 22 V

10 A / 20.4 V to 260 A / 32 V

MMA operating time

20°C 40°C

25%

30%

60%

100%

-

300 A

250 A

190 A

300 A

-

220 A

170 A

TIG operating time

20°C 40°C

30%

40%

60%

100%

-

300 A

260 A

200 A

300 A

-

240 A

190 A

Load alternation

10min (60% DC ∧ 6 min welding, 4 min break)

MMA open circuit voltage

99 V

MMA open circuit voltage with VRD

option

12 V

TIG open circuit voltage

12 V

Mains voltage (tolerances)

3x400 V (+ 20 % to – 25 % )

3x415 V (+ 15 % to – 25 % )

Frequency

50/60 Hz

Mains fuse (safety fuse, slow-blow)

16 A

Mains connection lead

H07RN-F4G1.5

Max. connected power

14.3 kVA

Recommended generator rating

19.3 kVA

cosϕ at Imax / efficiency

0,99 / 88%

Insulation class / protection

classification

H / IP 23

Ambient temperature

-10 °-C to +40 °C

Machine cooling / torch cooling

Fan / Gas

Workpiece lead

35 qmm

Dimensions L/W/H

490 x 186 x 350 mm;

490 x 186 x 445 mm (300 CEL PWS)

Weight

16.5 kg;

23.5 kg (300 CEL PWS)

Constructed to standards

EN 60974 / IEC 60974 / VDE 0544

EN 50199 / VDE 0544 Part 206

/

Machine description

PICO 300; 300 CEL; 300 CEL PWS

Item No.: 099-002032-EWM01 13

4 Machine description

4.1.1 PICO 230; 260; 300; PICO 230; 260; 300 CEL

4.1.2 Front view

1

2

3

4

6

5

7

8

9

Figure 4-1

Item Symbol Description 0

1 Carrying strap

2 Transport bar

3 Carrying handle

4 Control / Operating elements (see chapter Function specification)

5 Cooling air inlet

6

Connection socket, “+” welding current

Workpiece lead or electrode holder connection

7

Rubber feet

8

Connection socket, 19-pole

Remote control connection

9

Connection socket, “-” welding current

Electrode holder or workpiece lead connection

Machine description

PICO 300; 300 CEL; 300 CEL PWS

14 Item No.: 099-002032-EWM01

4.1.3 Rear view

1

2

3

Figure 4-2

Item Symbol Description 0

1

Main switch, machine on/off

2 Strain relief with mains connection cable

3 Cooling air outlet

Machine description

PICO 260; 300 CEL PWS

Item No.: 099-002032-EWM01 15

4.2 PICO 260; 300 CEL PWS

4.2.1 Front view

1

2

3

4

6

5

8

7

10

9

Figure 4-3

Item Symbol Description 0

1 Carrying strap

2 Transport bar

3 Carrying handle

4 Control / Operating elements (see chapter Function specification)

5 Cooling air inlet

6

Connection socket, 19-pole

Remote control connection

7

Connection socket, electrode holder

The welding current polarity (“+” or “-”) are based on the setting of the “Welding current

polarity changeover switch”.

8

Rubber feet

9

Welding current potential changeover switch

The changeover switch is used to switch over the welding current polarity (“+” or “-” ) of

the electrode holder and workpiece lead connection sockets.

= Welding current polarity “+” on connection socket .

= Welding current polarity “-” on connection socket .

10

Connection socket, workpiece lead

The welding current polarity (“+” or “-”) are based on the setting of the “Welding current

polarity changeover switch".

Machine description

PICO 260; 300 CEL PWS

16 Item No.: 099-002032-EWM01

4.2.2 Rear view

1

2

3

4

5

Figure 4-4

Item Symbol Description 0

1

Main switch, machine on/off

2 Strain relief with mains connection cable

3 Cooling air outlet

4

F4

Fuse

Solenoid switch pole reversal fuse

5

F5

Fuse

Solenoid switch pole reversal fuse

Functional characteristics

Machine control – Operating elements

Item No.: 099-002032-EWM01 17

5 Functional characteristics

5.1 Machine control – Operating elements

Figure 5-1

Item Symbol Description 0

1

Three-figure LED display

Display of welding current and voltage, welding parameters, error code

2

“Collective interference” signal light

Error messages, see chapter on troubleshooting, causes and remedies

3

“Excess temperature” signal light

In case of excess temperature, temperature monitors de-activate the power unit, and

the excess temperature control lamp comes on. Once the machine has cooled down,

welding can continue without any further measures.

4

sec

Hotstart time signal light (0.1 sec to 20 sec)

5

AMP%

Hotstart current signal light

50 % to 200 % of the main current

6

AMP

Current signal light

7

AMP

sec

“Welding parameter setting” rotary transducer

Setting of welding current and other welding parameter and their values

8

VRD open circuit voltage reduction (optional)

9

“Welding process” button

MMA welding

TIG welding

Functional characteristics

Welding data display

18 Item No.: 099-002032-EWM01

Item Symbol Description 0

10

AMP

VOLT

“Display switching” button

AMP

Welding current display

VOLT

Welding voltage display

11

“Arcforce” button (welding characteristics) according to electrode type

12

“Select welding parameters” button

This button is used to select the welding parameters depending on the welding process

and operating mode used.

5.2 Welding data display

The welding data display shows all relevant welding parameters and their values as selected. To the right

of the display on the control is an "arrow key" for selecting between welding current and welding voltage.

Further parameter displays are described later on in this chapter.

5.3 MMA welding

5.3.1 Selecting MMA welding

Control element Action Result Display

x x

MMA welding signal light

lights up

The last welding current set in this

procedure is displayed

AMP

sec

Main current setting

Welding current is displayed

5.3.2 Selecting the electrode type – Arcforce (welding characteristics)

During the welding process, arcforce prevents the electrode sticking in the weld pool with

increases in current. This makes it easier to weld large-drop melting electrode types at low

current strengths with a short arc in particular.

The electrode types used must be selected on the machine control to achieve the optimum

welding properties of the electrode types.

Control element Action Result Display

x x

The corresponding signal light

displays the selection.

-

Functional characteristics

MMA welding

Item No.: 099-002032-EWM01 19

5.3.2.1 Electrode type allocation

PICO 230; 260; 300

Item Electrode type

a)

rutile

b)

rutile basic

c)

basic

d)

rutile/cellulose

PICO 230; 260; 300 CEL

PICO 260; 300 CEL PWS

Item Electrode type

a)

rutile

b)

rutile basic

c)

basic and

rutile/cellulose

e)

cellulose

Figure 5-2

The selectable electrode characteristics on the machine control are guideline values. Every

characteristic can also be optimised for the relevant electrode types and their welding properties

(see chapter "Arcforce correction").

5.3.3 Selecting hotstart

Hotstart current

Control element Action Result Display

1 x

Signal light

AMP%

lights up.

Hotstart current is shown in

%

Hotstart current is set as a percentage of

the main current (50 % to 200 %).

Hotstart current is shown in

%

After a waiting time of approx 5 seconds, the display changes back to the main current set and

the signal light

AMP

comes on.

Hotstart time

Control element Action Result Display

2 x

Signal light

sec

lights up.

Hotstart time is displayed in

seconds

Hotstart time is set (0.1 sec to 20 secs) Hotstart time is displayed in

seconds

After a waiting time of approx 5 seconds, the display changes back to the main current set and

the signal light

AMP

comes on.

Functional characteristics

TIG welding

20 Item No.: 099-002032-EWM01

Functional sequence of hotstart device

The hotstart device uses an increased ignition current to improve arc ignition. The parameters for

the hotstart current and time can be adjusted individually.

When the stick electrode has been struck, the arc ignites at the adjusted hotstart current AMP (factory

setting: 120% of main current)

and welds at this current until the hotstart time in seconds has elapsed

(factory setting: 1 second). The hotstart current then reduces to the main current set.

Symbol Meaning

AMP Main current

AMP% Hotstart

current

sec Hotstart time

t

AMP%

AMP

I

sec

Figure 5-3

5.3.4 Antistick

Anti-stick prevents the electrode from annealing.

If the electrode sticks in spite of the Arcforce device, the

machine automatically switches over to the minimum

current within about 1 second to prevent the electrode

from overheating. Check the welding current setting

and correct according to the welding task!

Figure 5-4

5.4 TIG welding

5.4.1 TIG welding selection

Control element Action Result Display

x x

TIG welding signal light

lights

up

The last welding current set in

this procedure is displayed

AMP

sec

Main current setting

Read welding current

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EWM Pico 300 cel SVRD Operating Instructions Manual

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