Helpful Hints, Practice | Lincoln Electric IM536-D specs

Lincoln Electric IM536-D manual Helpful Hints, Practice

Page 28

B-14			LEARNING TO WELD

Helpful Hints

1.For general welding, it is not necessary to weave the arc, neither forward or backward nor sideways. Weld along at a steady pace. You will find it easier.

2.When welding on thin plate, you will find that you will have to increase the welding speed, whereas when welding on heavy plate, it is necessary to go more slowly in order to get good penetration.

3.When welding sheet metal 16 gauge (1.5 mm) and lighter, heat buildup may cause part warpage and burn through. One way to eliminate these problems is to use the back-stepping method illustrated in Figure B.21.

First weld from A to B; then from C to A; then from D to C; then from E to D, and so on.

B A C D E

Back-Stepping

FIGURE B.21

Practice

The best way of getting practice in the four skills that enable you to maintain:

1.Correct welding position

2.Correct way to strike an arc

3.Correct electrical stickout

4.Correct welding speed

is to perform the following exercise.

For the SP-125 Plus, use the following:

Mild Steel	16 gauge or 1/16 inch
	(1.6 mm)
Electrode	0.035" (0.9 mm)
	NR-211-MP
	Innershield Wire
Voltage Setting “V”	E
Wire Feed Speed “oo”	2

Refer to Figure B.22.

1.Learn to strike an arc by positioning the gun over the joint and touching the wire to the work.

2.Position face shield to protect face and eyes.

3.Depress gun trigger, hold gun so contact tip to work distance is about 3/8 to 1/2 inch (10 to 12 mm) and the gun is at proper angle.

4.After you strike the arc, practice the correct electri- cal stickout. Learn to distinguish it by its sound.

5.When you are sure that you can hold the correct electrical stickout, with a smooth “crackling” arc start moving. Look at the molten puddle constantly, and look at the “ridge” where the metal solidifies.

6.Run beads on a flat plate. Run them parallel to the top edge (the edge farthest away from you). This gives you practice in running straight welds, and also gives you an easy way to check your progress. The 10th weld will look considerably bet- ter than the first weld. By constantly checking on your mistakes and your progress, welding will soon be a matter of routine.

Contact

Tip

ESO

Gun Angle

FIGURE B.22

SP-125 PLUS

Image 28

Contents

SP-125 Plus Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Please Examine Carton and Equipment For Damage ImmediatelyTable of Contents Vii Installation Identify and Locate Components Safety PrecautionsElectric Shock can kill Work Clamp Installation Work Cable InstallationSelect Suitable Location StackingConnecting Gun Cable to the SP-125 Plus GUN InstallationGAS Connection Gas Solenoid Inlet Fitting Power Input Cable Input ConnectionsCode Requirements for Input Connections Requirements For Rated OutputRequirements For Maximum Output Requirements For CSA Rated OutputObserve all safety information throughout this manual OperationFumes and Gases can be dangerous Welding Sparks can cause fire or explosionControls and Settings Design Features AdvantagesGeneral Description Welding CapabilityWelding Operations Wire LoadingSequence of Operation Friction Brake Adjustments Wire ThreadingShielding Gas Making a WeldCleaning Tip And Nozzle Changing Machine Over to Feed Other Wire SizesProcess Guidelines Wire Feed Overload Protection Overload ProtectionOutput Overload Thermal ProtectionLearning to Weld Learning to WeldARC-WELDING Circuit SELF-SHIELDED Fcaw Welding ARCProcess Selection Gmaw MIG Welding ARCFor Gmaw MIG Process Common Metals Joint Types and PositionsFor Fcaw Innershield Process Butt Welds Penetration Welding In The Vertical Position Fillet Welds Machine SET UP for the SELF-SHIELDED Fcaw Process Welding Techniques for the SELF- Shielded Fcaw ProcessVertical-down Welding Correct Welding PositionCorrect Electrical Stickout ESO Correct Welding SpeedHelpful Hints PracticeMachine SET UP for the Gmaw MIG Process Welding Techniques for the Gmaw MIG ProcessFigure B.24 Troubleshooting Welds To Eliminate a Ropy Convex Bead in order of importanceTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart Accessories Optional AccessoriesK1799-1 Argon-Mixed Gas Adjustable Regulator and Hose Kit K586-1 Deluxe Adjustable Gas Regulator Hose KitReplacement Parts Innershield Fcaw ConversionMaintenance Maintenance Safety PrecautionsItems Requiring no Maintenance Routine and Periodic MAINTE- NanceGUN and Cable Maintenance Configuration of Components in Wire Feeding SystemFor Magnum 100L GUN Contact Tip Cable Liner Drive RollChanging the Contact TIP Changing Drive RollChanging Liner Liner trim length for gun with red trigger Magnum 100LGUN Handle Parts Figure D.3 SP-125 PlusTroubleshooting HOW to USE Troubleshooting GuideProblems Possible Areas Symptoms Misadjustments Troubleshooting GuideRecommended Course of Action Feeding Problems Welding Problems Wiring Diagrams SP-125 PlusSP-125 Plus SP-125 Plus How To Read Shop Drawings New Lessons in Arc WeldingNeed Welding Training? $700.00Precaucion Warnung

Lincoln Electric IM536-D manual Helpful Hints, Practice

LEARNING TO WELD