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IM467-B
May, 2003
SQUARE WAVE TIG 355
For use with machines having Code Numbers: 9951, 10056, 10389
9952, 10057, 10390
9953, 10058
9954, 10059
9955, 10060
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and
built with safety in mind.
However, your overall safety
can be increased by proper
installation . . . and thoughtful
operation on your part. DO
NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOU
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i i SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains are known to the State of California to cause can- chemicals known to the State of California to cause cer, birth defects, and other reproductive harm. cancer, birth defects, or other reproductive harm. The Above For Diesel Engines The Above For Gasoline Engines ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY
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ii ii SAFETY ELECTRIC SHOCK can kill. ARC RAYS can burn. 3.a. The electrode and work (or ground) circuits 4.a. Use a shield with the proper filter and cover are electrically “hot” when the welder is on. plates to protect your eyes from sparks and Do not touch these “hot” parts with your bare the rays of the arc when welding or observing skin or wet clothing. Wear dry, hole-free open arc welding. Headshield and filter lens gloves to insulate hands. should conform to ANSI Z87. I standards. 3.b. In
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iii iii SAFETY WELDING SPARKS can CYLINDER may explode cause fire or explosion. if damaged. 6.a. Remove fire hazards from the welding area. 7.a.Use only compressed gas cylinders If this is not possible, cover them to prevent containing the correct shielding gas for the the welding sparks from starting a fire. process used and properly operating Remember that welding sparks and hot regulators designed for the gas and materials from welding can easily go through small cracks pressure used. All hos
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iv iv SAFETY 6. Eloigner les matériaux inflammables ou les recouvrir afin de PRÉCAUTIONS DE SÛRETÉ prévenir tout risque d’incendie dû aux étincelles. Pour votre propre protection lire et observer toutes les instructions 7. Quand on ne soude pas, poser la pince à une endroit isolé de et les précautions de sûreté specifiques qui parraissent dans ce la masse. Un court-circuit accidental peut provoquer un manuel aussi bien que les précautions de sûreté générales suiv- échauffement et un risque d’inc
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v v for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product ��� Thank You as much pride as we have in bringing this product to you! Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment
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vi vi TABLE OF CONTENTS Page Safety.................................................................................................................................................i-iv Installation.............................................................................................................................Section A Technical Specifications Square Wave TIG 355.........................................................................A-1 Input and Output Specifications ...............
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vii vii TABLE OF CONTENTS TIG Welding Sequence of Operation (4-Step Mode) .........................................................B-19 Overload Protection..................................................................................................................B-20 Auxiliary Power .........................................................................................................................B-20 Accessories.........................................................................
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A-1 A-1 INSTALLATION TECHNICAL SPECIFICATIONS - SQUARE WAVE TIG 355 INPUT - SINGLE PHASE ONLY Input Voltages: 208 230 460 575 Input Currents @ 350A/34 VDC 110 100 50 40 RATED OUTPUT Duty Cycle Amps Volts at Rated Amperes 40% Duty Cycle 350 34 v 60% Duty Cycle 300 32 v 100% Duty Cycle 220 29 v OUTPUT Maximum Open Continuous Circuit Voltage Current Range Auxiliary Power 80 Volts Max. 2-400 Amps AC and DC 115 VAC 15 Amps Continuous RECOMMENDED INPUT WIRE AND FUSE SIZES For Unbalanced AC TIG Welding
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A-2 A-2 INSTALLATION Read this entire installation section before you TILTING start installation. Place the machine on a secure, level surface or on a recommended undercarriage. Any surfaces you place it on other than the ground must be firm, non- SAFETY PRECAUTIONS skid, and structurally sound. WARNING HIGH FREQUENCY INTERFERENCE ELECTRIC SHOCK can kill. PROTECTION • Do not touch electrically live parts or electrodes with your skin or wet The spark gap oscillator in the high frequency genera
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A-3 A-3 INSTALLATION 3. Be sure the torch and work cable rubber coverings FIGURE A.1 – REAR PANEL are free of cuts and cracks that allow high fre- quency leakage. Cables with high natural rubber 2 ® content, such as Lincoln Stable-Arc better resist high frequency leakage than neoprene and other 3 synthetic rubber insulated cables. 4. Keep the torch in good repair and all connections tight to reduce high frequency leakage. 5. The work terminal must be connected to a ground within ten feet of t
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A-4 A-4 INSTALLATION FIGURE A.2 – INPUT SUPPLY CONNECTIONS Refer to Figure A.2 for the following procedure. WARNING Welders are shipped connected for the highest input voltage listed on the rating plate. To change this con- nection for a different input voltage, reconnect both ELECTRIC SHOCK can kill. the power strap (P)and control lead (C) to their • Do not touch electrically live parts respective terminals corresponding to the input volt- or electrodes with your skin or wet age used. Designa
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A-5 A-5 INSTALLATION The Square Wave TIG 355 should be permanently wired into the power system. Plugs or connectors are not recommended. TABLE A.1 RECOMMENDED INPUT WIRE AND FUSE SIZES For all Stick, DC TIG, and Balanced AC TIG Welding (2) Based on the 1990 U.S. National Electrical Code 40% Duty Cycle Input Ampere Type 75°C Input Rating on Wire in Conduit Grounding Wire Fuse Size Volt/Freq. Nameplate AWG Copper Cond. AWG Copper Cond. (Super Lag) 208/60 110 4 6 150 230/60 100 6 6 125 460/60 50 8
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A-6 A-6 INSTALLATION OUTPUT CONNECTIONS WARNING Observe the safety precautions necessary for handling and using compressed gas containers. Contact your WARNING supplier for specific information. ELECTRIC SHOCK can kill. • Keep the electrode holder, TIG FIGURE A.3 – FRONT PANEL torch and cables insulation in good condition and in place. • Do not touch electrically live parts or electrode with skin or wet clothing. • Insulate yourself from work and ground. • Turn the power off pushbutton on t
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A-7 A-7 INSTALLATION DO NOT operate a water-cooled torch unless water is STICK ELECTRODE CABLE flowing. Water doesn’t flow until the solenoid is actu- CONNECTION ated. Turn the Power switch Off. Run the electrode and If using a water-cooled torch with a Magnum water work cables through the strain relief holes below the cooler, connect the cooler water outlet to the “Water welding output terminals and connect the cables to Valve In” fitting. Connect the TIG torch inlet to the the proper termin
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B-1 B-1 OPERATION OPERATING INSTRUCTIONS Read and understand this entire section of operating instructions before operating the machine. SAFETY INSTRUCTIONS WARNING ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrodes with your skin or wet cloth- ing. • Insulate yourself from the work and ground. • Always wear dry insulating gloves. FUMES AND GASES can be dangerous. • Keep your head out of fumes. • Use ventilation or exhaust to remove fumes from breathing zone. WELDING
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B-2 B-2 OPERATION DESIGN FEATURES AND ADVANTAGES GENERAL DESCRIPTION • Designed to NEMA EW-1 and International IEC-974 The Square Wave TIG 355 is a constant current, single Standards. range square wave AC/DC TIG (GTAW) arc welding power source with built-in high frequency stabilization. • Single output range of 2-400 amps covers the It also has stick (SMAW) capability. The Square Wave majority of TIG welding applications. TIG 355 gives the operator full control of the welding • Solid State O
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B-3 B-3 OPERATION • 115 Volt receptacle with 15 amp circuit breaker. WELDING CAPABILITY • Excellent arc starting and stability up through 400 The Square Wave TIG 355 is NEMA Class II (40) Power amps. Source rated 350 amps at 34 volts, 40% duty cycle. The duty cycle is based upon a 10 minute time period. • High resistance to AC arc rectification. (For 40% duty cycle, it is 4 minutes on and 6 minutes • No tungsten spitting within current range of elec- off.) The overload capacity is 375 amps
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B-4 B-4 OPERATION CONTROLS AND SETTINGS UPPER CASE FRONT CONTROLS Controls on the upper case front control panel are used for manual TIG and stick welding. Their func- tions are described below. Some controls are active in both TIG and stick welding, while others are active in TIG only. Refer to Figure B.1 for control locations. FIGURE B.1 – UPPER CASE FRONT CONTROLS 1 2 10 4 5 3 6 7 8 9 11 15 17 16 14 13 12 1. REMOTE/LOCAL CURRENT CONTROL SWITCH 7. VOLTS/AMPS METER SWITCH 12. PREFLOW TI
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B-5 B-5 OPERATION NOTE: If the Crater Fill switch (Item 16) is ON, UPPER CASE FRONT CONTROL PANEL welding will continue after the Arc Start switch is The upper case front panel controls are used for man- pressed and released the second time. (See ual TIG and stick welding. Crater Fill Controls.) 1. CURRENT CONTROL SWITCH NOTE: If the arc goes out while welding in the 4- Step mode, the machine will try to re-establish an A two-position toggle switch: arc for a period of two seconds. The outp
