Lincoln Electric UWW-170 Troubleshooting Welds, To Eliminate Stubbing* in order of importance

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B-16		LEARNING TO WELD		B-16

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,

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.

TROUBLESHOOTING WELDS

Good welds have excellent appearance.

To Eliminate Porosity (in order of importance):

1.Turn on gas supply, if used

2.Decrease voltage.

3.Increase stickout.

4.Increase WFS (wire feed speed).

5.Decrease drag angle.

6.Decrease travel speed.

NOTE: Always be sure the joint is free from moisture, oil, rust, paint or other contaminants.

To Eliminate a Ropy Convex Bead (in order of importance):

1. Increase voltage

2.Decrease stickout.

3.Decrease WFS (wire feed speed.

4.Decrease travel speed.

5.Decrease drag angle.

6.Check for correct gas, if used.

To Reduce Spatter (in order of importance):

1.Increase voltage.

2.Increase drag angle.

3.Decrease stickout.

4.Increase WFS (wire feed speed).

5.Decrease travel speed.

6.Check for correct gas, if used.

To Correct Poor Penetration (in order of impor- tance):

1.Decrease stickout.

2.Increase WFS (wire feed speed).

3.Increase voltage.

4.Decrease speed.

5.Decrease drag angle.

6.Check for correct gas, if used.

If Arc Blow Occurs (in order of importance):

NOTE: Try different ground connection locations before adjusting procedures.

1.Decrease drag angle.

2.Increase stickout.

3.Decrease voltage.

4.Decrease WFS (wire feed speed.

5.Decrease travel speed.

To Eliminate Stubbing* (in order of importance):

1.Increase voltage

2.Decrease WFS (wire feed speed)

3.Decrease stickout

4.Increase drag angle

*Stubbing occurs when the electrode drives through the molten puddle and hits the bottom plate tending to push the gun up.

SP 170-I

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Contents SP 170-I and UWW-170 California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéPlease Examine Carton and Equipment For Damage Immediately Thank YouTable of Contents Installation Safety Precautions 2INSTALLATIONA-2Identify and Locate Components Electric Shock can killLimitations Select Suitable LocationOutput Connections StackingWork Cable Installation GUN InstallationConnecting Gun Cable to the SP GAS ConnectionInput Connections Power Input Cable230 50/60 Line Cord ConnectionOperational Features and Controls Design Features AdvantagesOperation General DescriptionWelding Capability Controls and SettingsFriction Brake Adjustment Wire LoadingWelding Operations Sequence of OperationFigure B.4 Making a Weld Cleaning Tip And NozzleProcess Guidelines Overload Protection Changing Machine Over to Feed Other Wire SizesWelding with Gmaw MIG Learning to Weld Learning to WeldARC-WELDING Circuit SELF-SHIELDED Fcaw Welding ARCFor Gmaw MIG Process Gmaw MIG Welding ARCProcess Selection Joint Types and Positions Common MetalsFor Fcaw Innershield Process Butt WeldsFillet Welds Welding In The Vertical PositionPenetration Welding Techniques for the SELF- Shielded Fcaw Process Machine SET UP for the SELF-SHIELDED Fcaw ProcessVertical-down Welding Correct Welding PositionCorrect Welding Speed Correct Electrical Stickout ESO Practice Helpful HintsWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessFor the SP 170-I, use the following To Eliminate a Ropy Convex Bead in order of importance Troubleshooting WeldsTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Drive Roll Orientation Application ChartOutput Polarity Optional Accessories AccessoriesK464 .035 0.9 mm Innershield Welding Kit K491 .045 1.2 mm Innershield Welding KitInnershield Fcaw Conversion Replacement PartsRoutine Maintenance MaintenanceMaintenance Safety Precautions Configuration of Components in Wire Feeding System GUN and Cable MaintenanceGun Cable Cleaning Contact Tip Cable Liner Drive RollChanging Drive Roll UWW-170 only Component Replacement ProceduresChanging Drive Roll SP 170-I only Fully seat the liner bushing into the con Changing LinerGUN Handle Parts red trigger GUN Handle Parts black triggerHOW to USE Troubleshooting Guide TroubleshootingRecommended Course of Action Problems Possible Areas Symptoms MisadjustmentsGAS Flow Problems Welding Problems Wiring WiringPage New Lessons in Arc Welding How To Read Shop DrawingsNeed Welding Training? $700.00Precaucion Warnung