Lincoln Electric IM724 manual Friction Brake Adjustment, Wire Threading

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B-4

 

OPERATION

 

B-4

 

 

 

 

 

Friction Brake Adjustment

With wire spool installed on the spindle shaft and the wing nut loose, turn the spool by hand while slowly tightening the wing nut until a light drag is felt. Tighten the wing nut an additional 1/4 turn.

Note: When properly adjusted, the brake should pro- vide only enough drag to prevent overrun of the spool and excess slack in the wire. Too much drag may result in wire feeding problems, and may cause pre- mature wear of wire drive system components.

Wire Threading

Refer to Figure B.4

1.Release the Spring Loaded Pressure Arm (1) rotate the Idle Roll Arm (2) away from. the Wire Feed Drive Roll (3). Ensure that the groove size in the feeding position on the drive roll matches the wire size being used.

2.Carefully detach the end of the wire from the spool. To prevent the spool from unwinding, maintain tension on the wire until after step 5.

3.Cut the bent portion of wire off and straighten the first 4” (100 mm).

4.Thread the wire through the In-going guide tube (4), over the drive roll (3), and into the out-going guide tube (5).

5.Close the idle roll arm (2) and latch the spring loaded pressure arm (1) in place. Rotate the spool counterclockwise if required in order to take up extra slack in the wire.

6.The idle roll pressure adjustment wing nut is factory set to approximately five full turns from where the wing nut first engages the threads of the pressure arm (1). If feeding problems occur because the wire is flattened excessively, turn the pressure adjust- ment counter-clockwise to reduce distortion of the wire. Slightly less pressure may be required when using 0.023 – 0.025" (0,6 mm) wire. If the drive roll slips while feeding wire, the pressure should be increased until the wire feeds properly.

WARNING

When inching the welding wire, the drive rolls, the gun connector block and the gun contact tip are electrically energized relative to work and ground and remain energized for several seconds after the gun trigger is released.

2

 

1

5

4

3

 

 

 

 

 

The Wire Drive Feed Roll can

 

 

 

 

 

 

accommodate two wire sizes

 

 

 

by flipping the wire drive feed

 

 

 

 

 

roll over.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIGURE B.4

7.Refer to Figure B.5. Remove gas nozzle and con- tact tip from end of gun.

8.Turn the SP-135T ON (“I”).

9.Straighten the gun cable assembly.

10.Depress the gun trigger switch and feed welding wire through the gun and cable. (Point gun away from yourself and others while feeding wire.) Release gun trigger after wire appears at end of gun.

11.Turn the SP-135T OFF (“O”).

12.Replace contact tip and gas nozzle.

13.Refer to Figure B-6. Cut the wire off 1/4” – 3/8” (6

– 10 mm) from the end of the tip. The SP-135T is now ready to weld.

Gun Handle

Gas Diffuser/

Contact Tip

Gas Nozzle

FIGURE B.5

SP-135T

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Contents SP-135T 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 YouMaster Table of Contents for ALL Sections Technical Specifications SP-135T InstallationElectric Shock can kill Safety PrecautionsIdentify and Locate Components Select Suitable Location Work Clamp InstallationOutput Connections StackingWork Cable Installation GUN InstallationConnecting Gun Cable to the SP-135T GAS ConnectionFigure A.5 Requirements For Rated Output Input ConnectionsCode Requirements for Input Connections Operation Design FeaturesGeneral Description Recommended ProcessesLimitations Controls and SettingsWelding Capability Sequence of Operation Wire LoadingWelding Operations Wire Threading Friction Brake AdjustmentMaking 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 ARCProcess Selection Gmaw MIG Welding ARCJoint Types and Positions Common MetalsFor Gmaw MIG Process For Fcaw Innershield ProcessFillet 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 ESOPractice Helpful HintsWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessFor the SP-135T, 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 Application Chart Optional Accessories AccessoriesK586-1 Deluxe Adjustable Gas Regulator Hose Kit K549-1 .035 0.9 mm Innershield Welding KitInnershield Fcaw Replacement Parts Conversion Routine Maintenance MaintenanceMaintenance Safety Precautions Configuration of Components in Wire Feeding System GUN and Cable MaintenanceFor Magnum 100L GUN Contact Tip Cable Liner Drive RollChanging Drive Roll Component Replacement ProceduresChanging the Contact TIP Liner trim length Changing LinerGUN Handle Parts HOW to USE Troubleshooting Guide TroubleshootingRecommended Course of Action Problems Possible Areas Symptoms MisadjustmentsFacility Contact your local Lincoln Authorized Field ServiceWelding Problems SP-135T Wiring Diagram DiagramsSP-135T Precaucion
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