Northern Industrial Tools 164612 manual MIG Gun Illustration, Symbol Explanations

Page 9

IEC 60974-1: 2000 Arc welder safety requirement. Chapter 1: Welding Power source

3.4 MIG Gun Illustration

The MIG gun is composed of three components: Gun handle, cable and connector.

Connector is the end that connects into the drive system and interfaces with the wire feeder and gas connection. Cable is covered with a nylon tube with a liner in the center of the hollow cable. The center section of the liner is where the welding wire is fed through. The space between liner and center of the cable is the passage for shielding gas. The wire in the cable carries the electrical current from the drive housing connector point to the

contact tip.

The welding gun handle has a curved gooseneck between the handle and the adaptor/nozzle/contact tip. Use nozzle gel to prevent buildup of slag on the inside of the nozzle. Do not hit gun nozzle on a solid object to remove slag buildup. Remove nozzle and scrape out or use a MIG gun pliers with specially designed tip to scrape out slag. The gas flows from the cylinder through the gas valve to the connecting point where the gun is connected with the cable to the contact tip. The gas is released through the gas valve when the gun trigger is engaged. The gas disperses through the adaptor into the nozzle to cover the molten weld puddle. In windy conditions, user must either block the wind or use flux core wire.

Keep the MIG gun extended as straight as possible. Sharp turns in the gun cable will restrict wire feeding and affect the welding performance.

Warning: * Power must be off when assembling or disassembling the gun to the drive housing or when replacing the nozzle, adaptor or contact tip.

*Contact tips wear because of the wire passing through them and arcing, caused by electrical contact of the wire to the contact tip.

*The liner should be replaced if dirty and causing friction to the wire feeding. If cable has been crushed or cut, it must be replaced.

3.5 Symbol Explanations

Ground

Single phase

DC

X: Duty Cycle

I1: Rated Input Current

I2: Rated Welding Current

P1: Rated Input Power

U0: Rated No-Load Voltage

U1: Rated Input Voltage

U2: Rated Welding Voltage

7

Image 9
Contents MIG Save this Manual Product Description Technical Specifications General Welding SafetyWelder Specifications InstallationYour Welding Environment General Welding SafetyYour Welder’s Condition Use of Your Welder4B Fumes and Gases 4C UV and IR Arc Rays 4D Fire Hazards4E Hot Materials 4F Sparks/Flying Debris 4I Proper Care, Maintenance And Repair4G Electromagnetic Fields 4H Shielding Gas Cylinders Can ExplodeRequired Power Supply Technical SpecificationsProduct Description Proper Environment for WelderMIG Gun Illustration Symbol ExplanationsWelder Specifications Main Technical Data See TableStructure of Welder Top View Front View Left View Illustration Of Complete Assembly Setup/AssemblyElectrical Power Shielding Gas ConnectionOperation Connection Between Drive System and TorchConnection of the Gun Trigger Leads and Ground Cable Adjustment and Test before Welding Work Piece Cleaning before WeldingMaintenance and Service WeldingTroubleshooting See Table TroubleshootingCommon Weld Defects See Table Circuit Chart Quality Guarantee Packing ListTransport & Storage Illustrated Parts List Warranty Northern Tool + Equipment Co