Lincoln Electric SVM169-A service manual Recommended Electrode Amperage Ranges Precision TIG

Page 21

B-7

OPERATION

B-7

Return to Master TOC

WELDING IN STICK MODE

1.Put the electrode holder and cable quick connect plug into the electrode output receptacle. Turn clock- wise until tight. Connect the work clamp to the work piece.

2.Set the TIG/STICK switch to “STICK”.

3.Set the Polarity Switch to the weld mode desired for the type of electrode being used (most commonly DC+).

4.Place the electrode in the electrode holder.

WARNING

5.Turn the power switch to “ON”.

6.Adjust the Current Control to the desired amps.

7.Strike an arc and weld.

NOTE: When the TIG/STICK switch is set to “STICK” the output is always on when the power switch is on. A remote control has no effect on the welding current and the gas flow and high frequency TIG arc starter are dis- abled.

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

• In Stick Mode the output terminal and electrode will be electrically hot whenever the power switch is turned on.

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

RECOMMENDED ELECTRODE AMPERAGE RANGES - PRECISION TIG 185

The PRECISION TIG 185 is rated from 5-185 Amps.

SMAW Process

 

 

 

Welding Amp Range for Stick Electrode Size

ELECTRODE TYPE

 

POLARITY

3/32"

1/8"

5/32"

Fleetweld 5P, Fleetweld 5P+ E6010

DC+

40 - 70

75 - 130

90 - 175

Fleetweld 180

E6011

DC+

40 - 80

55 - 110

105

- 135

Fleetweld 37

E6013

DC+

70 - 95

100 - 135

145

- 180

Fleetweld 47

E7014

DC-

75 - 95

100 - 145

135

- 200

Excalibur

E7018

DC+

85 - 110

110 - 160

130

- 200

Blue Max Stainless

 

DC+

40 - 80

75 - 110

95

- 150

Red Baron Stainless

 

DC+

40 - 70

60 - 100

90

- 140

Mild steel procedures are based on recommended procedures listed in C2.10 8/94 and the maximum rating of the PRECISION TIG 185

Blue Max procedures are based on C6.1 6/95 Red Baron Procedure are based on ES-503 10/93

GTAW Process

 

Electrode Polarity

 

DC-

AC

 

 

Approximate Argon

 

 

Electrode Tip Preparation

 

Sharpened

Balled

 

 

Gas Flow Rate

 

 

Electrode Type

 

 

 

 

 

EWZr

 

 

C.F.H. (l/min.)

 

 

 

 

 

 

 

 

 

 

EWTh-1, EWCe-2

 

EWTh-1, EWTh-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EWTh-2, EWLa-1

EWP

EWCe-2, EWLa-1

 

 

 

Stainless

 

Tungsten Size (in.)

 

EWG

 

 

EWG

 

Aluminum

Steel

.010

 

Up to 15 A.

Up to 10 A.

 

Up to 15 A.

 

3-8

(2-4)

3-8

(2-4)

.020

 

Up to 15 A.

Up to 15 A.

 

Up to 20 A.

 

5-10

(3-5)

5-10

(3-5)

.040

 

Up to 80 A.

Up to 40 A.

 

Up to 60 A.

 

5-10

(3-5)

5-10

(3-5)

1/16

 

Up to 150 A.

Up to 100 A.

 

Up to 130 A.

 

5-10

(3-5)

9-13 (4-6)

3/32

 

Up to MAX. A.

Up to 160 A.

Up to MAX. A.

 

13-17 (6-8)

11-15 (5-7)

 

1/8

 

X

 

Up to MAX. A.

 

X

 

15-23

(7-11)

11-15

(5-7)

 

Tungsten electrodes are classified as follows by the American Welding Society (AWS):

 

 

 

 

 

Pure

EWP

green

TRI-MIX OF ELEMENTS

.............EWG.........gray

 

 

 

 

 

+1% Thoria

EWTh-1 ...

yellow

 

 

 

 

 

 

 

 

 

+2% Thoria

EWTh-2 ...

red

 

 

 

 

 

 

 

 

 

+2% Ceria

EWCe-2...

orange

 

 

 

 

 

 

 

 

 

+1.5% Lanthana

EWLa-1 ...

black

 

 

 

 

 

 

 

 

 

+0.15 to 0.40% Zirconia

....EWZr

brown

 

 

 

 

 

 

 

 

Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungsten in AC and DC applications.

PRECISION TIG 185

Image 21
Contents Precision TIG Safety Electric Shock can kill Welding Sparks can cause fire or explosion SafetySûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Installation Section Table of ContentsInput Single Phase only InstallationK2345-2 Input at Rated Output Model Height Width Depth WeightSelect Suitable Location Safety PrecautionsInput Connections Output Connections Input Reconnect ProcedureConnections for TIG Gtaw Welding TIG Torch ConnectionRemote Control Connection Work Cable ConnectionShielding GAS Connection Precision TIG Section B Operation SectionOperation Recommended Processes and Equipment Product DescriptionControl Functionality Controls and SettingsWelding in TIG Mode Operating StepsPulse TIG Control Benefits of the Precision TIG 185 Design Remote Control OperationRecommended Electrode Amperage Ranges Precision TIG Welding in Stick ModePrecision TIG Accessories Section Accessories Factory Installed OptionsTable C.1 K2348-1 Under-Storage Cart Field Installed OptionsPrecision TIG Section D Maintenance SectionMaintenance Routine and Periodic MaintenanceSpark GAP Adjustment Figure D.2 Location of Maintenance Components Return to Section TOC Section E Theory of Operation SectionInput Power Circuit Theory of OperationGeneral Description Figure E.3 Control Board and Output Feedback Control Output Rectification Feedback ControlFigure E.4 High Voltage/High Frequency Circuit High Voltage / High Frequency CircuitFigure E.5 DC Welding Current Generation DC Welding OutputFigure E.6 AC Square Wave Welding Current Generation AC Welding OutputFigure E.7 SCR Operation SCR OperationProtective Circuits Thermal ProtectionOverload Protection Section F Troubleshooting & Repair SectionHigh Voltage / High Frequency can damage test equipment Troubleshooting & RepairWorkstations PC Board Troubleshooting ProceduresCourse of Action Problems Possible Areas Recommended SymptomsPossible Areas Recommended Symptoms Problems Possible Areas Check the welding cables and or TIG Mode Problems Troubleshooting & Repair TIG Welding Problems Problems Possible Areas Electric Shock can Problems Possible Areas Recommended Symptoms Stick Welding Problems Test Description High Frequency Circuit Disable ProcedureFigure F.1 Spark GAP Assembly ProcedureT1 Transformer Test T1 Transformer Test Test ProcedurePrimary Windings Primary Voltages Return to Section Section TOCPrecision TIG Static SCR Test Static SCR Test Assembly Removal and Replacement Precision TIG Active SCR Test Active SCR Test Figure F.6 SCR Gate Locations Precision TIG AC TIG Mode Scope SettingsNormal Open Circuit Voltage Waveform DC TIG Mode AC Stick Mode DC Stick Mode Machine Loaded to 180 Amps AT 16VDC Typical Output Voltage Waveform Machine LoadedDC TIG Mode Machine Loaded to 180 Amps AT 26VDC DC Stick Mode 50 V/Div Precision TIG SCR Bridge Assembly Removal and Replacement Procedure Troubleshooting and RepairProcedure SCR Bridge AssemblyFront Panel Mounting Screws Figure F.9 Plug J2 on Control Board 42TROUBLESHOOTING & REPAIRF-42Replacement Procedure 43TROUBLESHOOTING & REPAIRF-43Precision TIG Polarity Switch Removal and Replacement Procedure Removal Procedure Polarity SwitchReplacement Procedure Precision TIG High Voltage Transformer Removal and Replacement Procedure Transformer Secondary Leads Precision TIG High Voltage TransformerFigure F.12 High Voltage Transformer Mounting Insulators Precision TIG Nutdriver Wrench Wire cutters Perform the SCR Bridge Assembly Removal Procedure Assembly Replacement Procedure Precision TIG Retest After Repair Troubleshooting and RepairInput Idle Amps Recommended Meters for Machine Output TestsPrecision TIG Electrical Diagrams Section Precision TIG Wiring Diagram Entire Machine G4549G4588 Schematic Entire Machine G4588Schematic Control PC Board G4550-1B4-1 Schematic Control P.C. Board G4550-1B4-2 Schematic Control P.C. Board G4550-1B4-3 G4551 PC Board Assembly Control G4551-1SVM Error Reporting Form