Lincoln Electric V205-T service manual AC TIG Welding Quick Start UP, Protective GAS

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B-11

OPERATION

B-11

 

 

 

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PROTECTIVE GAS

Both argon and helium work when welding aluminum. Argon is preferred, due to its lower cost and consump- tion rate. This gas also tends to stabilize the arc, thus making it easy to operate. For some applications, how- ever, the use of helium, or argon-helium blends, is rec- ommended due to better weld penetration and faster travel speed. Helium is especially suitable for welding thick workpieces. The recommended gas flow rates are shown in table 5.

 

TABLE 5

 

 

 

Current (A)

 

Helium cfh-(l/min)

50

 

29 - (14)

100

 

29 - (14)

150

 

42 - (20)

200

 

42 - (20)

250

 

53 - (25)

300

 

53 - (25)

 

 

 

AC TIG WELDING QUICK START UP

The Invertec V205 T AC/DC TIG is ready to AC TIG weld with the following features:

AC TIG

Trigger Mode in 2 step mode

Local control

Pulser off

AC Square Wave

AC Balance 65% EN

AC Frequency 100HZ

Pre Flow .5sec.

Post Flow 5 sec.

High Freq Start

Change from Local to Remote control by pushing front panel push button.

Set the maximum output current desired using the Output Control. Initiate the arc by closing the arc start switch. The Amptrol will control the output current from 10 amps to current level set by Output Control.

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WARNING

ELECTRIC SHOCK can kill.

Have an electrician install and service this equipment.

Turn the input power off at the fuse box, dis- connect or unplug supply lines and allow machine to sit for five minutes minimum to allow the power capacitors to discharge before working inside this equipment.

Do not touch electrically hot parts.

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Connect the shielding gas – typically argon – using a appropriate regulator. Connect the foot amptrol, torch and work lead to the power source.

With the work cable connected to a properly grounded work piece, turn the power source on.

To change the AC Frequency, press and hold the Parameter button for 3 seconds. The AC Frequency is now selected and can be varied by the Output Control. The frequency is displayed on the digital meter. After about 5 seconds, the power source will switch back to the welding mode ready to weld with the new selected AC Frequency.

To change the AC Balance, press and hold the Parameter button for 3 seconds, AC Frequency is selected, press the Parameter button again and AC Balance is selected. Adjust the Output Control for the desired AC Balance. After about 5 seconds, the power source will switch back to the welding mode ready to weld with the new selected AC Balance.

To change the Post Flow time, repeatedly push the Parameter button until the Post Flow indicator light is on. Adjust the Output control to the desired Post Flow time as indicated on digital display.

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V205-T AC/DC

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Contents Invertec V205-T AC/DC Safety Electric Shock can kill Cylinder may explode if damaged Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Operating Temperature Range Storage Temperature Range InstallationStacking Select Suitable LocationTilting Environmental AreaInput Connections Reconnect Procedure230V Input Attachment Plug Installation115V Input Engine Driven GeneratorOutput and GAS Connection for TIG Welding Figure A.1 Output Connection for StickWork Cable Connection Shielding GAS Connection Remote Control ConnectionV205-T AC/DC Table of Contents Operation Section General Description Safety InstructionsWelding Capability LimitationsFigure B.1 Rear Control Panel Figure B.1Figure B.2 Controls and SettingsLocal/Remote push button Selects the welding Step DiagramTIG DC TIG AC Indicator Parameter Default SET UP MenuWelding Polarity Output LimitationsFigure B.5 Copper TIG Welding Steel TIG WeldingTips for AC TIG Welding Filler MaterialProtective GAS AC TIG Welding Quick Start UPDC TIG Welding Quick Start UP Accessories Table of ContentsCompatible Equipment Optional AccessoriesCable Plugs TIG Torch KitsTable of Contents Maintenance Input Filter Capacitor Discharge Procedure Safety PrecautionsRoutine Maintenance Table of Contents Theory of Operation Section General Description Theory of OperationInput Board and BUS Board Figure E.3 Main Igbt Inverter Board Main Igbt Inverter BoardOutput Module Transistor Board Main TransformerOutput Module and Clamping Board Superimposition BoardOutput Filter Board CONTROL/DISPLAY Board High Frequency HF BoardFigure E.6 Igbt Insulated Gate Bipolar Transistor Igbt OperationTable of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairElectric Shock can kill PC Board Troubleshooting ProceduresOutput Problems Function Problems Function Problems Secondary Power Board Test Welding Problems Figure F.1 External Diagnostics Troubleshooting & Repair External DiagnosticsFigure F.2 Troubleshooting & Repair Internal DiagnosticsLED Internal DiagnosticsV205-T AC/DC Description Input Filter Capacitor Discharge ProcedureDischarge Procedure Input Filter Capacitor Discharge ProcedureInput Filter Board Test Input Filter Board Figure F.5 Input Filter Board V205-T AC/DC Main Igbt Inverter Board LOW Voltage Test Main Board Table F.1 Test Points LEDFigure F.7 Main Igbt Inverter Board Location TP2 MF2CONTROL/DISPLAY Board Test Control/Display Board Figure F.9 CONTROL/DISPLAY Board Location CN2 CN7 CN1Table F.2 Plug CN1 Test Points CN1Table F.3 Plug CN2 Test Points Table F.4 Plug CN7 Test PointsBUS Board Test BUS Board Table F.6 Plug CN3 Test Points Table F.5 Plug CN2 Test PointsTable F.7 Plug CN4 Test Points Table F.8 Plug CN7 Test PointsCN4 CN2Main Inverter Board Upfr Section Test Table F.10 Voltage Checks with 115 VAC Applied to Machine Figure F.14 Upfr Location on Main BoardDD1 MF9 TP9 Gndpwr RL1V205-T AC/DC Output Filter Board Test Troubleshooting and RepairOutput Filter Board Figure F.18 Output Filter Board Plug CN1 Figure F.17 Output Filter Board Plug LocationV205-T AC/DC Secondary Power Board Test Secondary Power Board Table F.13 Voltage Checks with 115 VAC Applied to Machine Figure F.20 Secondary Power Board Test Point LocationsV205-T AC/DC Main Inverter Board Welding Logic and Inverter Section Test Figure F.21 Main Board Location Main Inverter BoardTable F.17 LED Check in Stick Mode Table F.15 Feedback Voltage SignalsTable F.14 LED Functions Table F.16 Voltage Checks with 115 VAC Applied to MachineTP14 TP15 TP16 TP19 TP31 CN4/1-2 Short Circuit Ohms CN5/1-2 MF15 VDS MF12 MF16 VDS Figure F.23 Main Board Lower Left TP9 Ground PowerV205-T AC/DC Input Filter Board Removal and Replacement Input Filter Board Removal and Replacement RV1 V205-T AC/DC Main Igbt Board Removal and Replacement Main Igbt Board Removal & Replacement CN2 CN1 V205-T AC/DC CONTROL/DISPLAY Board Removal and Replacement CONTROL/DISPLAY Board Removal & Replacement CN3 CN7V205-T AC/DC Output Filter Board Removal and Replacement Removal and Replacement Casefront Mounting Screws Phillips Head Screws CN1 CN2 Output Diodes Removal and Replacement Figure F.35 Output Diode Location Output DiodesOutput Transistor Removal and Replacement Output Transistor Removal and Replacement Plug CN1 5mm V205-T AC/DC Table of Contents Electrical Diagrams Section Electrical DiagramsWiring Diagram V205-T AC/DC Standard Diagram SVM Error Reporting Form