Lincoln Electric SP-255 manual 12OPERATION, Making AN Auto Mode Weld

Page 24

B-12OPERATION

3.If the only result was drive roll slippage, loosen the gun cable Fast-Mate™ connection nut from the front of the SP-255 and pull the gun cable forward about 6” (152 mm). There should be a slight wavi- ness in the exposed wire. If there is no waviness, the pressure is too low. Tighten the thumbscrew 1/4 turn, lock the gun cable in place and repeat the above steps.

MAKING AN AUTO MODE WELD

1.Check that the polarity is correct for the process being used, then turn power switch ON.

2. Press

then select:

3. Press

then select:

4.If Spot or Stitch timing modes are required, per- form either step 4.a. for Spot or step 4.b. for Stitch; otherwise, go to step 5.

4.a.Press

then select:

 

 

 

 

IDEALARC SP-255 OCT94

Press

again to return to previous

 

display.

4.b.Press

then select:

 

 

 

 

Press

again to return to previous

 

display.

5.Inch the electrode through the gun and cable and then cut the electrode within approximately 3/8 inch (9.5 mm) of the end of the contact tip [3/4 inch (19 mm) for Outershield® electrodes].

6.If welding gas is to be used, turn on the gas sup- ply and set the required flow rate [typically 25-35 CFH (12-16.5 I/min)].

7.When using Innershield® electrode, the gas noz- zle may be removed from the insulation on the end of the gun and replaced with the gasless noz- zle. This will give improved visibility and eliminate the possibility of the gas nozzle overheating.

8.Connect work clamp to metal to be welded. Work clamp must make good electrical contact to the work. The work must also be grounded as stated in “Arc Welding Safety Precautions”.

WARNING

When using an open arc process, it is necessary to use correct eye, head, and body protection.

9.Position electrode over joint. End of electrode may be lightly touching the work.

10.Lower welding helmet, close gun trigger, and begin welding. Hold the gun so the contact tip to work distance is about 3/8 inch (9.5 mm), [3/4 inch (19 mm) for Outershield electrodes].

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

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Contents Safety Depends on You Idealarc SP-255Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Master Table of Contents for ALL Sections Section D Section ESection F AppendixINSTALLATIONA-1 Technical Specifications Idealarc SP-2552INSTALLATION Safety PrecautionsInput Power and Grounding Connections Uncrating the SP-255INSTALLATIONA-3 GUN and Cable InstallationOutput Polarity Connection 4INSTALLATION Shielding GASOPERATIONB-1 Fumes and Gases can be dangerous2OPERATION Recommended Processes and EquipmentWelding Capability LimitationsStart Mode Selections Process WIRE/GAS KEYOPERATIONB-3 Procedure Keys 4OPERATIONAuto KEY Typical Auto KEY Press SequencesOPERATIONB-5 Memory KeysTimer Keys 6OPERATIONTypical Memory Number KEY Press Sequence Spot KEYGUN Switch Keys OPERATIONB-78OPERATION Typical Toggle KEY Press SequenceUsing 4-STEP Trigger Interlock Function OPERATIONB-9Step Trigger Interlock Keys Typical Activate KEY Press SequenceGUN Switches Wire Drive RollProcedure for Changing Drive Roll Wire Reel LoadingIdle Roll Pressure Setting OPERATIONB-11To Start the Welder Feeding ElectrodeMaking AN Auto Mode Weld 12OPERATIONOPERATIONB-13 Wire Feed Overload Protection Explanation of Prompting and Error Messages14OPERATION Welding Thermal Overload ProtectionOPERATIONB-15 Operation ACCESSORIESC-1 2ACCESSORIES ACCESSORIESC-3 Disabling Spool GUNIdealarc SP-255 MAINTENANCED-1 Safety PrecautionsCable Cleaning Routine Maintenance2MAINTENANCE Liner Removal ReplacementMAINTENANCED-3 GUN Handle DisassemblyMagnum 250SP GUN Parts and Accessories Idealarc SP-255 TROUBLESHOOTINGE-1 HOW to USE Troubleshooting Guide2TROUBLESHOOTING Troubleshooting GuideProblems Possible Areas Symptoms Misadjustments Authorized Field Service FacilityTROUBLESHOOTINGE-3 4TROUBLESHOOTING Authorized Field Service FacilityContact your local Lincoln TROUBLESHOOTINGE-5 Function Problems6TROUBLESHOOTING Contact your local Lincoln Authorized Field Service FacilityWiring Diagrams SP-255 Wiring Diagram L9688 Dual VoltageWiring Diagrams Dimension Print Page Page Page Page How To Read Shop Drawings $700.00Precaucion Warnung Limited Warranty
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