Lincoln Electric SP-250 service manual Arrow KEY Operation When Used with Spot KEY

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B-8

OPERATION

B-8

 

 

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7.MEMORY KEYS: Press memory key location number in which you want to save a procedure or from which you want to recall a procedure from memory. See SAVE Key.

FIGURE B.3 - Sample SAVE Sequence.

8.SPOT KEY: Press to turn ON the Spot Weld Timer and display the spot weld ON time. Pressing the SPOT KEY a second time returns the screen to the previous display without turning off the spot timer. Anytime the Spot weld timer is on and the display is in the Auto or Manual mode, the word SPOT will appear in the bottom left corner of the display. See Figure B.2.

ARROW KEY OPERATION WHEN USED WITH SPOT KEY:

See Table B.1.

Left arrow keys: Do not function.

Center arrow keys: Press UP ( ) arrow key to increase Spot Weld ON time from 0.20 seconds to 2.5 seconds. Press DOWN ( ) arrow key to decrease Spot ON time from 2.5 seconds to 0.20 seconds.

Right arrow keys: - Do not function.

9.STITCH KEY: Press to turn Stitch Weld timers ON and display the Stitch Weld ON and OFF times. Pressing the STITCH key a second time returns the screen to the previous display without turning off the stitch timers. Anytime the Stitch weld timers are on and the display is in the Auto or Manual mode, the abbreviation STITCH will appear in the bottom left corner of the display. See Figure B.2.

ARROW KEY OPERATION WHEN USED WITH STITCH KEY:

See Table B.1.

Left arrow keys: Do not function.

Center arrow keys: Press UP ( ) arrow key to increase Stitch time ON from 0.20 seconds to 2.50 seconds. Press the DOWN () arrow key to decrease Stitch ON time from 2.50 seconds to 0.20 seconds.

Right arrow keys: Press UP () arrow key to increase Stitch OFF time from 0.20 seconds to 2.50 seconds. Press DOWN () arrow key to decrease Stitch OFF time from 2.50 seconds to 0.20 seconds.

10.TIMERS OFF KEY: Press to turn OFF both Spot and Stitch timers. When the TIMERS OFF key is pressed the indicating letters from the bot- tom left corner of the Auto and Manual mode dis- play disappears.

The six arrow keys do not function with this key.

11. GUN SWITCH CONTROL IPM VOLTS KEY: Press to engage the gun thumb switch to control IPM or VOLTS. Pushing the gun thumb switch forward (toward the tip) increases IPM or VOLTS . Pulling gun thumb switch back decreas- es IPM or VOLTS. The underlining cursor always indicates the selection being controlled by the gun thumb switch. See Figure B.4.

If the cursor is not present, the gun thumb switch does not function. This prevents any inadvertent actuations. Each time this IPM VOLTS key is pressed, the cursor moves in the following sequence: IPM to VOLTS to no cursor. The sequence continues each time the key is pressed.

NOTE: In Auto Mode, changing IPM changes arc volt- age. This can result in a change in metal thickness setting as well.

FIGURE B.4 - Using the IPM VOLTS key.

IDEALARC SP-250

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Contents Safety Depends on You Idealarc SP-250ARC Welding can be hazardous Idealarc SP-250Cylinder may explode if damaged Electric and MAG- Netic Fields IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcTable of Contents Installation Depth Weight GUN HeightStorage Operating Safety Precautions Select Proper LocationInput Connections StackingFuse and Wire Sizes Input Power Connections Ground ConnectionsConnect Shielding GAS Figure A.3 Ground Connection For 230/460/575 Volt ModelsReconnect Procedure SideReturn to Section TOC GUN Liner & Contact TIP Installation Install the Work ClampConnect Output Components Output Polarity ConnectionGUN & Cable Installation Figure A.9 European Style ConnectorOperation Safety Instructions Additional Safety PrecautionsGeneral Description Electric Shock can killSystem includes the following features OperationalControls Recommended ProcessesDesign Features Unit FeaturesWire Feeder Features Power Source FeaturesMachine Capability LimitationsDuty Amps Volts Cycle Controls and Settings Figure B.1 SP-250 Control Panel KeysArrow KEY Operation When Used with Process WIRE/GAS KEYArrow KEY Operation When Used with Auto KEY Arrow KEY Operation When Used with Manual KEYArrow KEY Operation When Used with Spot KEY Arrow KEY Operation When Used with Stitch KEYLeft arrow keys Do not function Right arrow keys Do not functionFigure B.5 Using the Toggle Function Step Trigger Interlock KeysRUN-IN Mode Changing RUN-IN Mode Codes 10001 and AboveMaking a Weld in Auto Mode Operating StepsUsing the 4-STEP Interlock Function in Auto Mode Making a Spot Weld in Auto ModeTo make an arc spot plug weld Using the GUN Thumb Switch Magnum SP-250 only Using the Wire Drive RollMaking a Stitch Weld in Auto Mode Using the GUN Trigger SwitchLoading the Wire Reel To mount 10 to 30 lb. spools 8 and 12 diameterSetting Idle Roll Pressure Feeding ElectrodeAccessories Options / Accessories Spool GUN Adapter KIT InstallationSpool GUN Module Board Installation Figure C.2 Spool Gun Module Board Installation Installation Spool GUN Connection BOXSpool GUN Connection Figure C.5 Spool Gun ConnectSpool GUN Installation to OLD K531 KIT Figure C.6 Spool Gun ConnectionMaintenance Maintenance Routine and PeriodicControl Board Choke Fan Assembly Main Transformer Theory of Operation Power Supply Operation Input Line Voltage and Main TransFormer Output Rectification and Feed Back ControlConstant Voltage Output Figure E.4 Constant Voltage OutputWire Drive Motor and Feedback Figure E.5 Wire Drive Motor and FeedbackThermal Protection SCR Operation Figure E.6 SCR OperationTroubleshooting & Repair HOW to USE Troubleshooting Guide Recommended Course of ActionPC Board Troubleshooting Procedures Board can be dam- aged by static electricityOutput Problems Warn Troubleshooting & Repair Function Problems Troubleshooting & Repair Wire Feeding Problems Liquid elec Trolyte in these capacitors isToxic. Avoid contact with any Portion of your bodyTroubleshooting & Repair Explanation of Prompting and Error Messages On Screen Error Message Message ExplanationExplanation of Prompting and Error Messages CONT’D On Screen Error MessageXxxx Current Overload Reduce Output Press ANY KEY to Stop Message Main Transformer Test Test DescriptionMaterials Needed Main Transformer Test Test Procedure Lead Plug Location From Expected Lead Voltage#206 4J6 #208 16J6 #209 7J6 G1992 Code 9402 only Troubleshooting & Repair Static SCR Rectifier Assembly Test Leads Figure F.4 SCR 1 Test Points Active SCR Rectifier Assembly Test Leads Figure F.7 SCR Tester Circuit and SCR connections SP-250 Keypad Resistance Test 25F-25Figure F.8A Plug J2 Location on G2252 PC Control Board Figure F.9 Plug J2 Test PointsTest Points KEY Pressed Maximum Allowable 27F-27Table F.1 SP-250 Keypad Resistance Tests Wire Drive Motor and Tachometer Feedback Test Wire Drive Motor and Tachometer Feedback Test Test Procedure Figure F.10A Plug J5 Location on G2252 PC Control Board#206B 4J6 #515B 1J6 #555 2J6 #541 6J6 #539 3J6 Pull the gun triggerTest for Supply Voltage to Tachometer Test for Feedback Voltage to the Control BoardScope Settings Normal Open Circuit Voltage WaveformMachine Loaded to 250 Amps AT 26 VDC Scope Settings Typical Output Voltage Waveform Machine LoadedMachine Loaded to 220 Amps AT 22 VDC Scope Settings Troubleshooting & Repair Typical SCR Gate Voltage Waveform Control PC Board Removal and Replacement Removal and Replacement Procedure Materials NeededTroubleshooting & Repair Keypad Removal and Replacement Keypad Removal and Replacement Procedure Wire Drive Assembly Removal and Replacement Wire Drive Assembly Removal and Replacement Procedure Figure F.13 Wire Drive Assembly RemovalSCR Output Rectifier Removal 43F-43Figure F.14 Heat Sink lead discon- nection Capacitor Bank Removal and Replacement Capacitor Bank Removal and Replacement Procedure Main Transformer Removal and Replacement Power Switch FAN Motor and FAN Removal and Replacement FAN Motor and FAN Removal and Replacement Procedure Figure F.18 Fan Motor and Fan Removal ComponentsTroubleshooting & Repair Wire Speed Range Open Circuit VoltageInput Volts/Hertz 230/60 375Table of Contents Electrical Diagrams G1992 Control PC Board Identification X9 . . . . . .IC-CMOS,UNDERVOLT-SENSING,RESET,MCU Idealarc SP-250 Electrical Diagrams G2252 Control PC Board TOC OCI2,OCI3 Optocoupler Triac Driver Idealarc SP-250 Electrical Diagrams Wiring Diagram for Code 9546 SP-250 230/460/575V Wiring DiagramWiring Diagram for Code 9723 Thumb SwitchImproper Lincoln Electric. 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