Thermal Arc 190 Fabricator User Manual

90 pages

To Next Page

190

230

FABRICATOR

MIG WELDING MACHINE

190

Service Manual

Revision.Version No: AE.01 Issue Date: June 9, 2006 Manual No.: 0-4878B

Operating Features:

Art # A-07329

Default Chapter1
- Service Manual1
- Table of Contents4
Section 17
Safety Instructions and Warnings7
- Arc Welding Hazards7
- Principal Safety Standards10
- Precautions de Securite en Soudage a L'arc11
- Dangers Relatifs Au Soudage À L'arc11
- Principales Normes de Securite14
Section 215
Introduction15
- How to Use this Manual15
- Equipment Identification15
- Symbol Chart16
- General Information17
- Safety17
- Protective Filter Lenses17
- Welding Protection17
- User Responsibility18
- Duty Cycle18
- MIG Gun Specifications18
- Options and Accessories18
- Power Supply Specifications19
- Wire Drive Specifications20
- Fabricator 190 Package System Contents20
Section 321
Installation21
- Environment21
- Location21
- Ventilation21
- Mains Supply Voltage Requirements22
- Quick Set up23
- Installation of Shielding Gas (GMAW) Process24
- Attaching the Gun and Cable Assembly to the Power Source26
- Feedrolls28
- Installing Wire Spool29
- Inserting Wire into the Feedhead and Welding Gun30
- Polarity Changeover32
Operation35
- Inside Panel35
- Power Supply Front Panel36
- TWECO Weldskill MIG Gun39
- Gun Consumable Parts39
- Installing a New Wire Conduit Liner40
- MIG Gun Maintenance41
- Basic Welding Technique41
- Technical Tips43
- Spot Welding Operation44
- Gas Selection for Gas Metal Arc Welding45
- Welding Setting Selection Guide46
Maintenance49
- Routine Maintenance & Inspection49
Troubleshooting51
- Basic Troubleshooting51
- Solving Problems Beyond the Welding Terminals51
- Welding Problems53
- Power Supply Problems55
- Wire Feeder Problems56
Advanced Troubleshooting57
- Main Circuit Description57
- Test Equipment and Tools57
- Removal of the Covers57
- Pre-Power up Checks58
- Initial Setup Conditions58
- Primary Power Test58
- Logic and Control Tests59
- Output Voltage Test60
- Wire Feed Test60
- Primary Power Problems61
- Logic and Control Problems61
- Output Voltage Problem62
- Wire Feed Problems62
- Test Procedures63
Section 865
- Circuit Operation65
Section 967
- Parts List67
- External Replacement Parts (1)68
- External Replacement Parts (2)70
- Electrical Components (1)73
- Electrical Components (2)74
- Wheel Axle and Body Panels75
Appendix 1: Options and Accessories77
Appendix 2: Options and Accessories (Con't)78
Appendix 3: Power Supply Circuit Diagram80
Appendix 4: Main Printed Circuit Board Schematic82
Appendix 5: Volt-Amp Curves84
Limited Warranty86
Warranty Schedule87
Global Customer Service Contact Information89

Questions and Answers:

E
Elizabeth BennettAug 14, 2025
How to fix porosity in Thermal Arc 190 Fabricator?
- T
  Tina DunlapAug 15, 2025
  To reduce porosity in your Thermal Arc Welding System, you can try the following: * Check the gas cylinder contents and flow meter. * Inspect for gas leaks between the regulator/cylinder connection and in the gas hose to the Power Source. * Ensure the hose from the solenoid valve to the MIG torch adaptor is intact and properly connected. * Shield the weld area from wind or increase the gas flow. * Minimize the distance between the MIG torch nozzle and the workpiece. * Ensure the gas holes are not blocked and gas is exiting the torch nozzle. * Prevent spatter buildup inside the MIG torch nozzle to avoid restricting gas flow. * Check the MIG gun O-rings for damage.