Lincoln Electric SVM161-A service manual AC TIG Welding Quick Start UP, Protective GAS

Page 27

B-11

OPERATION

B-11

 

Return to Master TOC

to Master TOC

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.

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return

Return to Master TOC

Return to Master TOC

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.

------------------------------------------------------------------------

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.

INVERTEC® V205-T AC/DC™

Image 27
Contents Invertec V205-T AC/DC Invertec V205-T AC/DC SafetyCan be dangerous Electric Shock can kill ARC Rays can burnSparks can cause fire or If damaged Explosion Powered equipmentWelding Cutting Cylinder may explodeSûreté Pour Soudage a L’Arc Précautions DE SûretéSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Operating Temperature Range Storage Temperature Range InstallationEnvironmental Area Select Suitable LocationStacking TiltingInput Connections Reconnect ProcedureEngine Driven Generator Attachment Plug Installation230V Input 115V InputOutput Connections Output and GAS Connection for TIG Welding Figure A.1Work Cable Connection Shielding GAS Connection Remote Control ConnectionInvertec V205-T AC/DC Table of Contents Operation Section Welding Capability Safety InstructionsOperation General DescriptionRear Control Panel Figure B.1 OPERATIONB-3Figure 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.7 Filler Material Steel TIG WeldingCopper TIG Welding Tips for AC TIG WeldingProtective GAS AC TIG Welding Quick Start UPDC TIG Welding Quick Start UP Table of Contents Accessories Section Cable Plugs AccessoriesOptional Accessories Compatible EquipmentTable of Contents Maintenance Section Routine Maintenance MaintenanceSafety Precautions Input Filter Capacitor Discharge ProcedureFigure D.1 Major Component Locations 3MAINTENANCEInvertec V205-T AC/DC 1TABLE of CONTENTS-THEORY of Operation Section E-1 Input Board and BUS Board Theory of OperationFigure E.3 Main Igbt Inverter Board Main Igbt Inverter BoardSuperimposition Board Main TransformerOutput Module Transistor Board Output Module and Clamping BoardCONTROL/DISPLAY Board High Frequency HF BoardOutput Filter Board Passive Active Insulated Gate Bipolar Transistor Igbt Operation1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and RepairElectric Shock can kill PC Board Troubleshooting ProceduresIgbt Perform the Input Filter Board Igbt Inverter Board Test Secondary Output Board Assembly Test See the Output Filter Display Troubleshooting and Repair External DiagnosticsFigure F.2 Troubleshooting and Repair Internal DiagnosticsLED Internal DiagnosticsInvertec V205-T AC/DC Materials Needed Test DescriptionCapacitor Solder Resistor Pads Input Filter Capacitor Discharge ProcedureInput Filter Board Test Procedure Input Filter Board TestInput Filter Board Input Filter Board Invertec V205-T AC/DC Main Igbt Inverter Board LOW Voltage Test Figure F.6 Main Igbt Inverter Board Location Main Igbt Inverter Board LOW Voltage TestLED Main Igbt Inverter Board LOW Voltage TestFigure F.7 Main Igbt Inverter Board Location TP2 MF2CONTROL/DISPLAY Board Test Figure F.8 CONTROL/DISPLAY Board Location CONTROL/DISPLAY Board TestFigure F.9 CONTROL/DISPLAY Board Location CN2Figure F.10 Plugs CN1, CN2 & CN7 CN1BUS Board Test Figure F.11 BUS Board Location BUS Board TestTable F.8 Plug CN7 Test Points Table F.5 Plug CN2 Test PointsTable F.6 Plug CN3 Test Points Table F.7 Plug CN4 Test PointsCN1 CN2 Main Inverter Board Power Factor Section Test Main Inverter Board Power Factor Section Test Table F.10 Voltage Checks with 115 VAC Applied to MachineTable F.11 Resistance Checks TP9 Gndpwr RL1 Invertec V205-T AC/DC Output Filter Board Test Figure F.16 Output Filter Board Location Output Filter Board TestFigure F.18 Output Filter Board Plug CN1 Figure F.17 Output Filter Board Plug LocationInvertec V205-T AC/DC Secondary Output Board Assembly Test Figure F.19 Secondary Power Board Location Secondary Output Board Assembly TestOFF GA-SA Table F.14 Output Diode Resistance Check Mode Positive Meter Negative Meter Expected Reading ProbeMain Inverter Board Welding Logic and Inverter Section Test Welding Logic and Inverter Section Test Main Inverter BoardTable F.17 Voltage Checks with 115 VAC Applied to Machine Table F.16 Feedback Voltage SignalsTable F.18 LED Check in Stick Mode Table F.15 LED FunctionFigure F.22 Main Board Inverter Section TP9 Ground Power Invertec V205-T AC/DC Input Filter Board Removal and Replacement Figure F.24 Input Filter Board Location Input Filter Board Removal and ReplacementRV1 RV2 Invertec V205-T AC/DC Main Igbt Board Removal and Replacement Figure F.27 Main Igbt Board Location Main Igbt Board Removal and ReplacementRV1 RV2 CN4 RV3 RV4 CN5 RV5 RV7 RV6 Invertec V205-T AC/DC CONTROL/DISPLAY Board Removal and Replacement Figure F.29 CONTROL/DISPLAY Board Location CONTROL/DISPLAY Board Removal and ReplacementCN2 Invertec V205-T AC/DC Output Filter Board Removal and Replacement Figure F.32 Output Filter Board Location Removal and ReplacementPhillips Head Screws CN1 Output Diodes Removal and Replacement To Replace ANY of the Output Diodes D1, D2, D3 or D4 Output Diodes Removal and ReplacementOutput Transistor Removal and Replacement Figure F.36 Output Transistor Location Output Transistor Removal and ReplacementPlug CN1 5mm Allen Bolts Invertec V205-T AC/DC Table of Contents Diagram Section ELECTriCaL DiaGramS