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OM-207
156615D
August 1999
Processes
TIG (GTAW) Welding
Description
Arc Welding Power Source
R
Maxstar 91
Visit our website at
www.MillerWelds.com

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Sommaire des Matières pour Miller Maxstar 91

  • Page 1 OM-207 156615D August 1999 Processes TIG (GTAW) Welding Description Arc Welding Power Source Maxstar 91 Visit our website at www.MillerWelds.com...
  • Page 2 – 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.
  • Page 3: Table Des Matières

    TABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING ......The following terms are 1-1.
  • Page 5: Section 1 - Safety Precautions - Read Before Using

    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.
  • Page 6 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.
  • Page 7: Additional Symbols For Installation, Operation, And Maintenance

    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.
  • Page 8: Emf Information

    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.
  • Page 9: Section 1 - Consignes De Securite - Lire Avant Utilisation

    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...
  • Page 10 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.
  • Page 11: Dangers Supplémentaires En Relation Avec L'installation, Le Fonctionnement Et La Maintenance

    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...
  • Page 12: Principales Normes De Sécurité

    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.
  • Page 13: Section 2 - Specifications

    SECTION 2 – SPECIFICATIONS 2-1. Specifications Amperes Input at Maximum Open- Rated Welding Amperage Overall Rated Load Output Circuit Voltage Weight Output Range 115 V AC, 50/60 Hz, Dimensions Single-Phase Length: 16-1/2 in (419 mm) 90 A @ 14 Volts DC, 31 lb Width: 9-1/2 in Min.
  • Page 14: Volt-Ampere Curves

    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...
  • Page 15: Selecting And Preparing Weld Output Cables

    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...
  • Page 16: Remote 14 Receptacle Information And Connections

    3-5. Remote 14 Receptacle Information And Connections Remote 14 Receptacle RC2 (See Section 3-6) Keyway Plug Threaded Collar To connect to receptacle, align C L N keyway, insert plug, and tighten threaded collar. Rear Panel sb7.1 5/94 – ST-800 916 / Ref. S-0004-A / S-0750 / Ref. ST-141 127-B 3-6.
  • Page 17: Section 4 - Operation

    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.
  • Page 18: Amperage Control Switch

    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).
  • Page 19: Lift-Arc Switch

    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-...
  • Page 20: Section 5 - Maintenance & Troubleshooting

    SECTION 5 – MAINTENANCE & TROUBLESHOOTING 5-1. Routine Maintenance Turn Off all power before maintaining. 3 Months 3 Months Replace Unreadable Labels Section Clean Tape Or Replace Tighten Weld Cracked Connections Cables 6 Months Replace Cracked Parts – – Blow Out 14-Pin Cord Vacuum Inside...
  • Page 21: Troubleshooting

    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;...
  • Page 22 Notes OM-207 Page 18...
  • Page 23: Section 6 - Electrical Diagram

    SECTION 6 – ELECTRICAL DIAGRAM SC-175 939 Figure 6-1. Circuit Diagram For Welding Power Source OM-207 Page 19...
  • Page 24: Section 7 - Selecting And Preparing Tungsten Electrode

    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 ♦...
  • Page 25: Preparing Tungsten For Ac Or Dc Electrode Positive (Dcep) Welding

    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-...
  • Page 26: Section 8 - Guidelines For Tig Welding (Gtaw)

    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.
  • Page 27: Positioning Torch Tungsten For Various Weld Joints

    8-3. Positioning Torch Tungsten For Various Weld Joints ° Butt Weld And Stringer Bead ° ° ° “T” Joint ° ° ° ° Lap Joint ° ° ° ° Corner Joint ° ° ST-162 003 / S-0792 OM-207 Page 23...
  • Page 28: Section 9 - Parts List

    SECTION 9 – PARTS LIST Hardware is common and not available unless listed. ST-157 446-D Figure 9-1. Main Assembly OM-207 Page 24...
  • Page 29 Item Dia. Part Mkgs. Description Quantity Figure 9-1. Main Assembly ....195 585 HANDLE, rubberized carrying ........
  • Page 30 Item Dia. Part Mkgs. Description Quantity Figure 9-1. Main Assembly (Continued) ....135 289 CAPACITOR ..........
  • Page 31 Item Dia. Part Mkgs. Description Quantity Figure 9-2. Module, Power & Diode (Fig 9-1 Items 12 & 15) ....155 803 MODULE, diode (consisting of) ........
  • Page 35 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 &...
  • Page 36: For Service

    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...

Table des Matières