Miller Electric Shopmaster 300 AC/DC Owner's Manual
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Miller Electric Shopmaster 300 AC/DC Owner's Manual

Miller Electric Shopmaster 300 AC/DC Owner's Manual

Arc welding power source
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Shopmaster 300 AC/DC
OM-322
203 118A
April 2002
Processes
TIG (GTAW) Welding
Stick (SMAW) Welding
MIG (GMAW) Welding
Flux Cored (FCAW) Welding
Description
Arc Welding Power Source

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Do you have a question about the Shopmaster 300 AC/DC and is the answer not in the manual?

Questions and answers

Andy
January 21, 2025

Can I run TIG on my machine

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1 comments:
Mr. Anderson
February 4, 2025

Yes, the Miller Electric Shopmaster 300 AC/DC can run TIG (GTAW) welding.

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Summary of Contents for Miller Electric Shopmaster 300 AC/DC

  • Page 1 OM-322 203 118A April 2002 Processes TIG (GTAW) Welding Stick (SMAW) Welding MIG (GMAW) Welding Flux Cored (FCAW) Welding Description Arc Welding Power Source Shopmaster 300 AC/DC Visit our website at www.MillerWelds.com...
  • Page 2 Welding Process Manuals such as SMAW, GTAW, GMAW, and GMAW-P. Miller Electric manufactures a full line of welders and welding related equipment. For information on other quality Miller products, contact your local Miller distributor to receive the latest full line catalog orindividual catalog sheets.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING ......1-1.

  • Page 5: Section 1 - Safety Precautions - Read Before Using

    SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING som _nd_4/98 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 4/98 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 - Installation

    SECTION 2 – INSTALLATION 2-1. Specifications Input at Rated Load Output, Max. 60 Hz, Single-Phase Rated Weld Open- Model Weld Output Amperes At Circuit Output Output Mode Mode Voltage 200 V 230 V 460 V 575 V NEMA Class II (40): 200 16.8 Amperes, 28 Volts AC, 80 Volts AC...

  • Page 14: Duty Cycle And Overheating

    2-3. Duty Cycle And Overheating Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating. If unit overheats, thermostat opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle be- fore welding.

  • Page 15: Selecting A Location

    2-4. Selecting A Location Lifting Eye Lifting Forks Use lifting eye or lifting forks to move unit. If using lifting forks, extend forks beyond opposite side of unit. Movement Location And Airflow Rating Label (Under Access Door) Use rating label to determine input power needs.

  • Page 16: Weld Output Terminals And Selecting Cable Sizes

    2-6. Weld Output Terminals And Selecting Cable Sizes Total Cable (Copper) Length In Weld Circuit Not Exceeding 150 ft 200 ft 250 ft 300 ft 350 ft 400 ft 100 ft (30 m) Or Less (45 m) (60 m) (70 m) (90 m) (105 m) (120 m)

  • Page 17: 115 Volts Ac Duplex Receptacle

    2-8. 115 Volts AC Duplex Receptacle Y Turn Off power before con- necting to receptacle. 115 V AC Receptacle Receptacle is protected from over- load by circuit breaker CB1 (see Section 4-2). Power output is shared between this receptacle and the Remote 14 receptacle (see Section 2-7).

  • Page 18: Placing Jumper Links And Connecting Input Power

    2-10. Placing Jumper Links And Connecting Input Power Check input voltage available at site. Jumper Link Label Check label – only one is on unit. Jumper Links 200 VOLTS 230 VOLTS 460 VOLTS Move jumper links to match input voltage. Input And Grounding Conductors Select size and length using...

  • Page 19: Section 3 - Operation

    SECTION 3 – OPERATION 3-1. Controls Ref. 202 556-A Y Weld output terminals are energized Arc Force (Dig) Control voltage (V) scale. when Output (Contactor) switch is Power Switch For SMAW, control increases short-circuit On and Power is On. amperage which allows the operator to use Output Selector Switch Remote 14 Receptacle (See a very short arc length without sticking the...

  • Page 20: Section 4 - Maintenance & Troubleshooting

    SECTION 4 – MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance Y Disconnect power before maintaining. 3 Months Repair Or Replace Replace Unreadable Cracked Labels Weld Cables Clean And Replace Tighten Cracked Weld Parts Terminals Torch, Electrode Holder, 14-Pin Cord Or Gun Cable 6 Months Blow Out Or Vacuum Inside,...

  • Page 21: Troubleshooting

    4-3. Troubleshooting Trouble Remedy No weld output; unit completely Place line disconnect switch in On position (see Section 2-10). inoperative. Check and replace line fuse(s), if necessary (see Section 2-10). Check for proper input power connections (see Section 2-10). Check for proper jumper link position (see Section 2-10). No weld output;...

  • Page 22: Section 5 - Electrical Diagram

    SECTION 5 – ELECTRICAL DIAGRAM Figure 5-1. Circuit Diagram OM-322 Page 18...
  • Page 23 203 057-B OM-322 Page 19...

  • Page 24: Section 6 - Parts List

    SECTION 6 – PARTS LIST 802 882 Figure 6-1. Main Assembly OM-322 Page 20...
  • Page 25 Quantity Model Item Dia. Part 200/230 230/460 Mkgs. Description /460 /575 Figure 6-1. Main Assembly ..... 202390 . . . COVER, .
  • Page 26 Hardware is common and not available unless listed. 802 885 Figure 6-2. Panel, Front w/Components OM-322 Page 22...
  • Page 27 Quantity Model Item Dia. Part 200/230 230/460 Mkgs. Description /460 /575 Figure 6-2. Main Assembly ..... 169136 . . . PIN,HANDLE .
  • Page 28 Hardware is common and not available unless listed. 802 884 Figure 6-3. Panel, Rear w/Components Quantity Model Item Dia. Part 200/230 230/460 Mkgs. Description /460 /575 Figure 6-3. Panel, Rear w/Components ..
  • Page 29 Notes...
  • Page 30 Notes...
  • Page 31 Call LIMITED WARRANTY – Subject to the terms and conditions APT, ZIPCUT & PLAZCUT Model Plasma Cutting below, Miller Electric Mfg. Co., Appleton, Wisconsin, warrants Torches 1-800-4-A-MILLER to its original retail purchaser that new Miller equipment sold...

  • Page 32: Options And Accessories

    FAX: 44 (0) 1204-598066 www.MillerWelds.com Contact the Delivering Carrier for: File a claim for loss or damage during shipment. For assistance in filing or settling claims, contact your distributor and/or equipment manufacturer’s Transportation Department. PRINTED IN USA 2002 Miller Electric Mfg. Co. 1/02...

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