Lincoln Electric IM725 manual Changing Machine Over to Feed Other Wire Sizes, Process Guidelines

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B-6

OPERATION

B-6

 

 

 

 

9.To stop welding, release the gun trigger and then pull the gun away from the work after the arc goes out.

10.When no more welding is to be done, close valve on gas cylinder (if used), momentarily operate gun trigger to release gas pressure, and turn off the SP-135 PLUS.

Cleaning Tip And Nozzle

Clean the contact tip and nozzle to avoid arc bridging between the nozzle and contact tip which can result in a shorted nozzle, poor welds and an overheated gun. Hint: Anti-stick spray or gel, available from a welding supply distributor, may reduce buildup and aid in spat- ter removal.

PROCESS GUIDELINES

The SP-135 PLUS can be used for welding mild steel using the GMAW, single pass, process which requires a supply of shielding gas or it can be used for the self shielded,Innershield® process (FCAW).

The recommended gases and electrodes for GMAW are welding grade CO2 gas or an argon-CO2blended gas (75 to 80% argon and 25 to 20% CO2) and .025" (0.6 mm) diameter Lincoln L-56 mild-steel welding wire, supplied on 12-1/2 lb (5.7 kg) spools.

The recommended electrode for the self-shielded process is 0.035(0,9 mm) diameter Lincoln Innershield NR-211-MP on 10 Ib (4,5 kg) spools. This electrode can be used for all position welding of 20 gauge through 5/16(1,0 8,0 mm) thick steel [multi- ple passes are required for 1/4and 5/16(6,0 and 8,0 mm)].

WARNING

Use of the GMAW process with the SP-135 PLUS on thicker materials than recommended may result in poor welds. The welds may lookgood, but may just be sittingon top of the plate. This is called cold castingand will result in weld fail- ure.

The SP-135 PLUS is suitable for .035" Aluminum wire and .030" stainless wire. Refer to Table B.1 for Recommended Procedure Settings. Aluminum wire requires K663-1 Aluminum Welding kit. See ACCES- SORIES section.

CAUTION

It is important when changing between welding with steel wire and aluminum to exchange feeding components due to the lubricant applied to steel wire. Failure to do so may result in contaminated welds when welding aluminum.

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TABLE B.1 SP-135 PLUS Welding Procedures

 

Welding

Shielding

 

 

 

 

Process

Wire

Gas

16 ga

14 ga

12 ga

10 ga

MIG DC+

.035 Dia

100% Argon

D-4.5

H-6.5

H-6.5

J-7.5

 

4043 Aluminum

 

 

 

 

 

 

Wire

 

 

 

 

 

MIG DC+

.035 Dia

100% Argon

C-5.5

D-6

G-8.5

H-9.5

 

5356 Aluminum

 

 

 

 

 

 

Wire

 

 

 

 

 

MIG DC+

.030 Dia

98% Argon/

D-3

F-4

J-5

J-6.5

 

308L Stainless

2% Oxygen

 

 

 

 

 

Steel Wire

 

 

 

 

 

 

 

 

 

 

 

 

CHANGING MACHINE OVER TO FEED OTHER WIRE SIZES

The SP-135 PLUS is shipped from the factory ready to feed 0.023-0.025(0,6 mm) diameter wire. To operate the SP-135 PLUS with other sizes of wire, it is neces- sary to change the contact tip and change the drive roll over to other sizes. Refer to Changing the Contact Tip and Changing the Drive Roll, in the MAINTE- NANCE section, for specific information on these pro- cedures.

WELDING WITH FCAW (Innershield)

Welding with Innershield requires an Innershield Welding Kit. A gasless nozzle is provided in the Innershield Welding Kit. When using Innershield elec- trode, installing the gasless nozzle will improve visibili- ty of the arc and protect the gas diffuser from weld spatter. Additionally included is a gun cable liner to permit proper feeding of .035(0,9 mm) Innershield wire. Refer to the ACCESSORIES section for details on obtaining this kit.

SP-135 PLUS

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Contents SP-135 Plus Safety Depends on YouSafety Electric Shock can kill Iii SafetySP-135 Plus Sûreté Pour Soudage a L’Arc Précautions DE SûretéPlease Examine Carton and Equipment For Damage Immediately Thank YouTable of Contents Technical Specifications SP-135 Plus InstallationIdentify and Locate Components Safety PrecautionsElectric Shock can kill Stacking Work Clamp InstallationWork Cable Installation Select Suitable LocationPlus GUN InstallationConnecting Gun Cable to the SP-135 GAS ConnectionCable Input ConnectionsGas Solenoid Inlet Fitting InputRequirements For Rated Output Code Requirements for Input ConnectionsRequirements For Maximum Output Welding Sparks can cause fire or explosion Observe all safety information throughout this manualOperation Fumes and Gases can be dangerousWelding Capability Controls and SettingsDesign Features Advantages General DescriptionWelding Operations Wire LoadingSequence of Operation 4OPERATIONB-4 Making a Weld Shielding GasCleaning Tip And Nozzle Changing Machine Over to Feed Other Wire SizesProcess Guidelines Thermal Protection Wire Feed Overload ProtectionOverload Protection Output OverloadSELF-SHIELDED Fcaw Welding ARC Learning to WeldLearning to Weld ARC-WELDING CircuitProcess Selection Gmaw MIG Welding ARCFor Fcaw Innershield Process Common MetalsJoint Types and Positions For Gmaw MIG ProcessPenetration Welding In The Vertical PositionFillet Welds Correct Welding Position Machine SET UP for the SELF-SHIELDED Fcaw ProcessWelding Techniques for the Self Shielded Fcaw Process Vertical-down WeldingCorrect Welding Speed Correct Electrical Stickout ESOPractice Helpful HintsWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessFigure B.24 To Eliminate Stubbing* in order of importance Troubleshooting WeldsTo Eliminate a Ropy Convex Bead in order of importance To Correct Poor Penetration in order of impor- tanceProper Gun Handling Application Chart Optional Accessories AccessoriesK586-1 Deluxe Adjustable Gas Regulator Hose Kit Innershield Fcaw Conversion Replacement PartsRoutine and Periodic MAINTE- Nance MaintenanceMaintenance Safety Precautions Items Requiring no MaintenanceContact Tip Cable Liner Drive Roll GUN and Cable MaintenanceConfiguration of Components in Wire Feeding System For Magnum 100L GUNChanging Drive Roll Changing the Contact TIPGUN Handle Parts Changing LinerLiner trim length for gun with red trigger Magnum 100L HOW to USE Troubleshooting Guide TroubleshootingProblems Possible Areas Symptoms Misadjustments Troubleshooting GuideRecommended Course of Action Feeding Problems GAS Flow Problems Diagrams WiringSP-135 Plus $700.00 How To Read Shop DrawingsNew Lessons in Arc Welding Need Welding Training?Precaucion Warnung