DocLib_42_0-4905 ArcMaster 400MST CE.pdf - Victor Technologies ...

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Description Possible Cause Remedy 4 Portions of the weld run do not fuse to the surface of the metal or edge of the joint. 5 Non-metallic particles are trapped in the weld metal (slag inclusion). A B Small electrodes used on heavy cold plate. Welding current is too low. 46 A B Use larger electrodes and pre-heat the plate. Increase welding current. C Wrong electrode angle. C Adjust angle so the welding arc is directed more into the base metal. D Travel speed of electrode is D Reduce travel speed of too high. electrode. E Scale or dirt on joint surface. E Clean surface before welding. A Non-metallic particles may be trapped in undercut from previous run. B Joint preparation too restricted. C Irregular deposits allow slag to be trapped. D Lack of penetration with slag trapped beneath weld bead. E Rust or mill scale is preventing full fusion. F Wrong electrode for position in which welding is done. Figure 9. Example of Lack of Fusion Figure 10. Examples of Slag Inclusion A If bad undercut is present, clean slag out and cover with a run from a smaller diameter electrode. B Allow for adequate penetration and room for cleaning out the slag. C If very bad, chip or grind out irregularities. D Use smaller electrode with sufficient current to give adequate penetration. Use suitable tools to remove all slag from corners. E Clean joint before welding. F Use electrodes designed for position in which welding is done, otherwise proper control of slag is difficult.
10.05 Power Source Problems Description Possible Cause Remedy 1 The welding arc cannot be established. 2 Maximum output welding current cannot be achieved with nominal Mains supply voltage. 3 Welding current reduces when welding 4 No gas flow when the torch trigger switch is depressed. A B The Primary supply voltage has not been switched ON. The Welding Power Source switch is switched OFF. 47 A B Switch ON the Primary supply voltage. Switch ON the Welding Power Source. C Loose connections internally. C Have an accredited Thermal Arc Service Agent repair the connection. Defective control circuit. Have an accredited Thermal Arc Service Agent inspect then repair the welder. A B Poor work lead connection to the work piece. Gas hose is cut. Gas passage contains impurities. A B Ensure that the work lead has a positive electrical connection to the work piece. Replace gas hose. Disconnect gas hose from the rear of Power Source then raise gas pressure and blow out impurities. C Gas regulator turned OFF. C Turn gas regulator ON. D Torch trigger switch lead is disconnected or switch/cable is faulty. Reconnect lead or repair faulty switch/cable.
Page 1 and 2: 400 MST ARCMASTER ® Operating Manu
Page 3 and 4: WARNINGS Read and understand this e
Page 5: TABLE OF CONTENTS SECTION 7: BASIC
Page 8 and 9: ARCMASTER 400 MST 3. Use protective
Page 10 and 11: ARCMASTER 400 MST WARNING STEAM AND
Page 12 and 13: ARCMASTER 400 MST AVERTISSEMENT LE
Page 14 and 15: ARCMASTER 400 MST 1. Utilisez l’
Page 16 and 17: ARCMASTER 400 MST 10
Page 18 and 19: 2.01 How to Use This Manual This Ow
Page 20 and 21: 2.05 Functional Block Diagram Figur
Page 22 and 23: 3.04 Electrical Input Requirements
Page 24 and 25: 3.07 High Frequency Interference In
Page 26 and 27: 4.01 ARC MASTER 400 MST Controls 1
Page 28 and 29: 6. ON/OFF Switch This switch connec
Page 30 and 31: Parameter Description Selects in op
Page 32 and 33: Vertical up welding When welding ve
Page 34 and 35: 7 4 3 SECTION 5: SEQUENCE OF OPERAT
Page 36 and 37: 5.03 MIG Welding • Connect work l
Page 38 and 39: 6.04 Guide for Selecting Filler Wir
Page 40 and 41: SECTION 7: BASIC STICK WELDING GUID
Page 42 and 43: 8.01 Setting of the Power Source SE
Page 44 and 45: SECTION 9: ROUTINE MAINTENANCE The
Page 46 and 47: Inconsistent Wire Feed WARNING Dise
Page 48 and 49: 8 Arc does not have a crisp sound,
Page 50 and 51: Description Possible Cause Remedy 8
Page 54 and 55: Description Possible Cause Remedy 5
Page 56 and 57: 11.03 Switching VRD On/Off Switch t
Page 58 and 59: SECTION 12: POWER SOURCE ERROR CODE
Page 60: Description Possible Cause Remedy R
Page 63 and 64: UB2 UB4 TB7 TB21 TB8 CT1 CT2 TB16 T
Page 66 and 67: LIMITED WARRANTY AND SCHEDULE This
Page 68: World Headquarters Thermadyne Holdi

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