Lincoln Electric 170I Machine SET UP for the SELF-SHIELDED Fcaw Process, Vertical-down Welding

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B-11

 

LEARNING TO WELD

 

B-11

 

 

 

 

 

 

 

 

 

 

PROPER GUN ANGLE

PROPER GUN ANGLE

FOR GMAW PROCESS

FOR FCAW PROCESS

WELDING IN THE VERTICAL UP POSITION

WELDING IN THE VERTICAL UP POSITION

FIGURE B.16

Vertical-down Welding

Refer to Figure B.17 Vertical-down welds are applied at a fast pace. These welds are therefore shallow and narrow and, as such, are excellent for sheet metal. Vertical-down welds may be applied to 5/32” (3.9 mm) and lighter material.

Use stringer beads and tip the gun in the direction of travel so the arc force helps hold the molten metal in the joint. Move as fast as possible consistent with desired bead shape.

The important thing is to continue lowering the entire arm as the weld is made so the angle of the gun does not change. Move the electrode wire fast enough that the slag does not catch up with the arc. Vertical-down welding gives thin, shallow welds. It should not be used on heavy material where large welds are required.

FIGURE B.17

MACHINE SET UP FOR THE SELF-SHIELDED FCAW PROCESS

•See PROCESS GUIDELINES in the OPERATION section for selection of welding wire and shielding gas, and for range of metal thicknesses that can be welded.

•See the Application Guide on the inside of wire feed section door for information on setting the controls.

•Set the “Voltage” and “Wire Speed” controls to the settings suggested on the Application Guide for the welding wire and base metal thickness being used. The voltage control is marked “V” and the wire feed speed is marked ‘’olo.’’

•Check that the polarity is correct for the welding wire being used. Set the polarity for DC(–) when welding with Steelcore 71T-GS Innershield elec- trode. See Work Cable Installation in the INSTALLA- TION section for instructions on changing polarity.

•When using Innershield electrode, the gasless noz- zle may be used instead of a gas nozzle to improve visibility of the arc.

•Connect work clamp to metal to be welded. Work clamp must make good electrical contact to the work piece. The work piece must also be grounded as stated in the “Arc Welding Safety Precautions” at the beginning of this manual.

WELDING TECHNIQUES FOR THE SELF- SHIELDED FCAW PROCESS

Four simple manipulations are of prime importance when welding. With complete mastery of the four, welding will be easy. They are as follows:

•The Correct Welding Position

Figure B.11 illustrates the correct welding position for right handed people. (For left handed people, it is the opposite.)

Hold the gun (of the gun and cable assembly) in your right hand and hold the shield with your left hand. (Left handers simply do the opposite.)

When using the FCAW Process, weld from left to right (if you are right handed). This enables you to clearly see what you are doing. (Left handers do the opposite.) Tilt the gun toward the direction of travel holding the electrode at an angle as shown in Figure B.18.

Handymig 170i

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Contents Handymig Safety For Engine powered equipmentElectric and Magnetic Fields may be dangerous Fumes and Gases can be dangerous Electric Shock can killARC Rays can burn IiiCylinder may explode if damaged Welding Sparks can cause fire or explosionInstructions for ELECTRO- Magnetic Compatibility Assessment of AreaPlease Examine Carton and Equipment For Damage Immediately Table of Contents Section E ViiiSection D Section FInstallation Technical Specifications HandymigSafety Precautions Identify and Locate ComponentsOutput Connections Work Clamp InstallationSelect Suitable Location StackingConnecting Gun Cable to the Handymig GUN InstallationWork Cable Installation GAS ConnectionInput Connections Figure A.5Electrical Input Connection For Rated Output Line Cord ConnectionOperation Design Features AdvantagesOperational Features and Controls General DescriptionLimitations Controls and SettingsWelding Capability Sequence of Operation Wire LoadingWelding Operations Wire Threading Figure B.4Making a Weld Cleaning Tip And NozzleProcess Guidelines Welding with Fcaw Innershield Changing Machine Over to Feed Other Wire SizesWelding with Gmaw MIG Shielding GasLearning to Weld Learning to WeldOverload Protection SELF-SHIELDED Fcaw Welding ARC Gmaw MIG Welding ARCJoint Types and Positions Process SelectionCommon Metals Fillet Welds Welding In The Vertical PositionPenetration Vertical-down Welding Machine SET UP for the SELF-SHIELDED Fcaw ProcessWelding Techniques for the SELF- Shielded Fcaw Process Correct Welding PositionCorrect Electrical Stickout ESO Correct Welding SpeedHelpful Hints PracticeMachine SET UP for the Gmaw MIG Process Welding Techniques for the Gmaw MIG ProcessFor the Handymig 170i, use the following To Correct Poor Penetration in order of impor- tance Troubleshooting WeldsTo Eliminate a Ropy Convex Bead To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart GUN and Cable Maintenance MaintenanceRoutine Maintenance Changing Drive Roll Component Replacement ProceduresChanging the Contact TIP Liner trim length Changing LinerGUN Handle Parts Ground Test Procedure 1TROUBLESHOOTINGE-1 HOW to USE Troubleshooting GuideProblems Possible Areas Symptoms Misadjustments TroubleshootingTroubleshooting Guide Recommended Course of ActionAuthorized Field Service Facility Contact your local Liquid ArcWelding Problems Wiring Diagrams Handymig 170i Wiring Diagram CodePrecaucion Warnung Copyright 2000 Lincoln Global Inc
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