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OM-207 156615D August 1999 Processes TIG (GTAW) Welding Description Arc Welding Power Source Maxstar 91 Visit our website at www.MillerWelds.com...
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– every power source from This Owner’s Manual is designed to help you get the most out of your Miller is backed by the most Miller products. Please take time to read the Safety precautions. They will hassle-free warranty in the business.
SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING som _nd_5/97 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. This group of symbols means Warning! Watch Out! possible Y Marks a special safety message.
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ARC RAYS can burn eyes and skin. BUILDUP OF GAS can injure or kill. D Shut off shielding gas supply when not in use. Arc rays from the welding process produce intense D Always ventilate confined spaces or use visible and invisible (ultraviolet and infrared) rays that can burn eyes and skin.
1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can cause injury. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables.
1-5. EMF Information Considerations About Welding And The Effects Of Low Frequency 1. Keep cables close together by twisting or taping them. Electric And Magnetic Fields 2. Arrange cables to one side and away from the operator. Welding current, as it flows through welding cables, will cause electro- magnetic fields.
SECTION 1 – CONSIGNES DE SECURITE – LIRE AVANT UTILISATION som _nd_fre 5/97 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette procédure présente des risques de danger ! Ceux-ci sont identifiés par des symboles adjacents aux directives. Ce groupe de symboles signifie Mise en garde ! Soyez vigilant ! Il y a des Y Identifie un message de sécurité...
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LES RAYONS DE L’ARC peuvent pro- LES ACCUMULATIONS DE GAZ ris- voquer des brûlures dans les yeux et quent de provoquer des blessures ou sur la peau. même la mort. Le rayonnement de l’arc du procédé de soudage D Fermer l’alimentation du gaz protecteur en cas de génère des rayons visibles et invisibles intenses non utilisation.
1-3. Dangers supplémentaires en relation avec l’installation, le fonctionnement et la maintenance Risque D’INCENDIE OU DES ORGANES MOBILES peuvent D’EXPLOSION. provoquer des blessures. D Ne pas placer l’appareil sur, au-dessus ou à proxi- D Rester à l’écart des organes mobiles comme le mité...
1-4. Principales normes de sécurité Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel- Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1, ding Society, 550 N.W. Lejeune Rd, Miami FL 33126 de la Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.
2-3. Volt-Ampere Curves The volt-ampere curves show the minimum and maximum voltage and amperage output capabilities of the welding power source. Curves of other settings fall between the curves shown. ssb1.1 10/91 – SA-156 101 SECTION 3 – INSTALLATION 3-1. Selecting A Location 10 in (254 mm) Open Space On Right Side And Rear Of Unit For Good Airflow...
3-2. Selecting And Preparing Weld Output Cables Weld Output Cable Determine total cable length in weld circuit and maximum welding am- peres. See Section 3-3 to select proper cable size. Use shortest cables possible. Do not use damaged cables. Terminal Lug Use lugs of proper amperage capacity and hole size for connect- ing to work clamp or electrode...
SECTION 4 – OPERATION 4-1. Controls Amperage Adjustment Control Amperage Control Switch Output (Contactor) Switch Lift-Arc Switch Power Switch Pilot Light Optional Amperage/Voltage Meter And Switch ST-157 358-A 4-2. Output (Contactor) Switch Output (Contactor) Switch Use switch to select way of control- ling output.
4-3. Amperage Control Switch Amperage Adjustment Control Use control to select weld amper- age. Amperage may be adjusted while welding. Amperage Control Switch Use switch to select way of control- ling amperage adjustment. For front panel control, place switch in Panel position. For remote control, place switch in Remote 14 position (see Section 3-5).
NOTE Lift-Arc switch must be in Off position when using a High-Frequency unit with this welding power source. 4-4. Lift-Arc Switch Lift-Arc Switch Use switch to select Lift-Arc start On or Off. With Lift-Arc On, start an arc in GTAW welding as follows: GTAW Electrode Workpiece Touch tungsten electrode to work-...
5-3. Troubleshooting Trouble Remedy No weld output; unit completely inop- Be sure Power switch is On. erative. Secure power cord plug in receptacle (see Section 3-7). Check line fuse(s), and replace if needed. Reset circuit breakers (see Section 3-7). Check for proper input connections (see Section 3-7). No weld output;...
SECTION 7 – SELECTING AND PREPARING TUNGSTEN ELECTRODE gtaw 7/97 NOTE For additional information, see your distributor for a handbook on the Gas Tungsten Arc Welding (GTAW) process.Wear clean gloves to prevent contamination of tungsten electrode. 7-1. Selecting Tungsten Electrode ♦...
7-2. Preparing Tungsten For AC Or DC Electrode Positive (DCEP) Welding Tungsten Electrode Balled End Y Understand follow safety symbols at start of Section 8-1 before preparing tungsten. Ball end of tungsten before welding 1-1/2 Times by applying either an ac amperage Electrode Diameter slightly higher than what is recom- mended for a given electrode diam-...
SECTION 8 – GUIDELINES FOR TIG WELDING (GTAW) 8-1. Positioining The Torch Y Weld current can damage electronic parts in vehicles. Disconnect both battery cables before welding on a vehicle. Place work clamp as close to the weld as possible. Workpiece Make sure workpiece is clean before welding.
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Effective January 1, 2000 (Equipment with a serial number preface of “LA” or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other Warranty Questions? guarantees or warranties expressed or implied. Call LIMITED WARRANTY – Subject to the terms and conditions APT, ZIPCUT &...
Distributor Address City State For Service Call 1-800-4-A-Miller or see our website at www.MillerWelds.com to locate a DISTRIBUTOR or SERVICE AGENCY near you. Always provide Model Name and Serial/Style Number. Contact your Distributor for: Welding Supplies and Consumables Options and Accessories...