Lincoln Electric SVM161-A Step Diagram, Local/Remote push button Selects the welding

Page 21

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

B-5

OPERATION

B-5

 

 

5. Output / Parameter Adjust Knob- Allows you to

 

2 STEP DIAGRAM 1

continuously adjust the current both in TIG and in Stick

 

(1)

welding. Allows you to change the value, shown on

 

 

 

"Digital Display Item 6", of the parameter selected with

 

 

"Setup/Parameter select button Item 4".

 

 

 

6. Digital Display - displays currently set values for

 

 

each mode or welding parameter.

 

 

 

7. Local/Remote push button - Selects the welding

 

 

current adjusting system:

 

Possible variations of this standard sequence is shown

• from front panel

 

 

in (2 step diagram 2). It is possible to press and hold

• from remote control

 

 

the TIG torch trigger a second time during downslope

The LED beside the symbol confirms the selection.

to restart. After the trigger is pressed the output current

 

 

8. Tig Trigger Sequences -

 

will increase to the welding current. This operation is

 

shown in (2 step diagram 2).

For the V205-T AC/DC™, TIG welding can be done in

 

2 STEP DIAGRAM 2

either the 2-step or 4-step mode which is selected with

 

 

 

the Trigger Mode Push Button.

 

(1)

(2)

 

 

 

2-Step Sequence

 

 

 

With the Trigger Mode switch in the 2-step position,

 

 

the following welding sequence will occur. This

 

 

sequence is shown in (2-step diagram 1)

 

 

 

1. Press and hold the Arc Start Switch to start the

4-Step Sequence

sequence.

With the 4-step Selected, the following welding

 

The machine will open the gas valve to start the flow

sequence will occur.

 

of the shielding gas. After a 0.5 second preflow time,

1. Press and hold the Arc Start Switch to start the

to purge air from the torch hose, the output of the

sequence.

machine is turned ON. At this time the arc is started.

 

After the arc is started the output current will be

The machine will open the gas valve to start the flow

of the shielding gas. After a 0.5 second preflow time,

increased from the start current to the welding cur-

to purge air from the torch hose, the output of the

rent. Both the start current and increase, or upslope

machine is turned ON. At this time the arc is started.

time are presettable. The default start current is 15

 

amps and the default upslope time is 0.2 seconds.

After the arc is started the output current will be at

 

2. Release the Arc Start Switch to stop welding.

the Start current. This condition can be maintained

as long or as short as necessary.

 

The machine will now decrease the output current at

 

a controlled rate, or downslope time, until the Finish

If the Start current is not necessary, do not hold the

current, (also commonly referred to as Crater

TIG torch trigger as described at the beginning of this

Current) is reached and the output of the machine is

step. Instead, quickly press and release the trigger.

turned OFF. Both the Downslope Time and the Finish

In this condition, the machine will automatically pass

Current are can be preset.

from Step 1 to Step 2 when the arc is started.

 

After the arc is turned OFF, the gas valve will remain

2. Release the TIG torch trigger to start the main part

open to continue the flow of the shielding gas to the

of the weld.

hot electrode and work piece. The duration of this

 

postflow shielding gas is adjusted by the Postflow

The output current will be increased from the start

Parameter.

current to the welding current. Both the start current

 

 

and increase, or upslope time are presettable. The

 

default start current is 15 amps and the default ups-

 

lope time is 0.2 seconds.

INVERTEC® V205-T AC/DC™

Page 20 Page 22
Image 21
Page 20 Page 22
Contents Invertec V205-T AC/DC Invertec V205-T AC/DC SafetyCan be dangerous Electric Shock can kill ARC Rays can burnWelding Cutting Powered equipmentCylinder may explode Sparks can cause fire or If damaged ExplosionSûreté 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 InstallationStacking Select Suitable LocationTilting Environmental AreaInput Connections Reconnect Procedure230V Input Attachment Plug Installation115V Input Engine Driven GeneratorOutput 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 Operation Safety InstructionsGeneral Description Welding CapabilityRear 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 Copper TIG Welding Steel TIG WeldingTips for AC TIG Welding Filler MaterialProtective GAS AC TIG Welding Quick Start UPDC TIG Welding Quick Start UP Table of Contents Accessories Section Optional Accessories AccessoriesCompatible Equipment Cable PlugsTable of Contents Maintenance Section Safety Precautions MaintenanceInput Filter Capacitor Discharge Procedure Routine MaintenanceFigure 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 BoardOutput Module Transistor Board Main TransformerOutput Module and Clamping Board Superimposition 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.6 Plug CN3 Test Points Table F.5 Plug CN2 Test PointsTable F.7 Plug CN4 Test Points Table F.8 Plug CN7 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.18 LED Check in Stick Mode Table F.16 Feedback Voltage SignalsTable F.15 LED Function Table F.17 Voltage Checks with 115 VAC Applied to MachineFigure 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
Top Page Image Contents