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S-74S, S-74D
OM-1500-10
207 748K
2006−01
Processes
MIG (GMAW) Welding
Flux Cored (FCAW) Welding
(Gas- And Self-Shielded)
Description
Wire Feeder
File: MIG (GMAW)

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Summary of Contents for Miller Electric S-74D

  • Page 1 S-74S, S-74D Visit our website at www.MillerWelds.com OM-1500-10 207 748K 2006−01 Processes MIG (GMAW) Welding Flux Cored (FCAW) Welding (Gas- And Self-Shielded) Description Wire Feeder File: MIG (GMAW)
  • Page 2 ISO 9001:2000 Quality System Standard. particular model are also provided. 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 or individual specification sheets.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1-1. Symbol Usage ............... . 1-2.
  • Page 4 Declaration of Conformity for European Community (CE) Products NOTE This information is provided for units with CE certification (see rating label on unit). Manufacturer: Miller Electric Mg. Co. 1635 W. Spencer St. Appleton, WI 54914 USA Phone: (920) 734-9821 European Contact Signature:...
  • Page 5: Section 1 − Safety Precautions - Read Before Using

    DC constant voltage (wire) welder, 2) a DC manual (stick) welder, or 3) an AC welder with reduced open-circuit volt- age. In most situations, use of a DC, constant voltage wire welder is recommended. And, do not work alone! D Disconnect input power or stop engine before installing or servicing this equipment.
  • Page 6 D Do not use welder to thaw frozen pipes. D Remove stick electrode from holder or cut off welding wire at contact tip when not in use.
  • Page 7: Additional Symbols For Installation, Operation, And Maintenance

    1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. D Do not install or place unit on, over, or near combustible surfaces. D Do not install unit near flammables. D Do not overload building wiring − be sure power supply system is properly sized, rated, and protected to handle this unit.
  • Page 8: Principal Safety Standards

    1-5. Principal Safety Standards Safety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1, from Global Engineering Documents (phone: 1-877-413-5184, website: www.global.ihs.com). Recommended Safe Practices for the Preparation for Welding and Cut- ting of Containers and Piping, American Welding Society Standard F4.1 from Global...
  • Page 9: Section 2 − Consignes De Sécurité − À Lire Avant Utilisation

    SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION Y Avertissement : se protéger et protéger les autres contre le risque de blessure — lire et respecter ces consignes. 2-1. Symboles utilisés Symbole graphique d’avertissement ! Attention ! Cette pro- cédure comporte des risques possibles ! Les dangers éven- tuels sont représentés par les symboles graphiques joints.
  • Page 10 LES RAYONS D’ARC peuvent entraî- ner des brûlures aux yeux et à la peau. Le rayonnement de l’arc du procédé de soudage génère des rayons visibles et invisibles intenses (ultraviolets et infrarouges) susceptibles de provo- quer des brûlures dans les yeux et sur la peau. Des étincelles sont projetées pendant le soudage.
  • Page 11: Autres Symboles Relatifs À L'installation, Au Fonctionnement Et À L'entretien De L'appareil

    2-3. Dangers supplémentaires en relation avec l’installation, le fonctionnement et la maintenance Risque D’INCENDIE OU D’EXPLO- SION. D Ne pas placer l’appareil sur, au-dessus ou à proximité de surfaces inflammables. D Ne pas installer l’appareil à proximité de produits inflammables. D Ne pas surcharger l’installation électrique −...
  • Page 12: Principales Normes De Sécurité

    2-5. Principales normes de sécurité Safety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1, de Global Engineering Documents (téléphone : 1-877-413-5184, site In- ternet : www.global.ihs.com). Recommended Safe Practices for the Preparation for Welding and Cut- ting of Containers and Piping, American Welding Society Standard AWS F4.1 de Global Engineering Documents (téléphone : 1-877-413-5184, site Internet : www.global.ihs.com).
  • Page 13: Section 3 − Definitions

    SECTION 3 − DEFINITIONS 3-1. Warning Label Definitions S-178 936 A. Warning! Watch Out! There are possible hazards as shown by the symbols. B. Drive rolls can injure fingers. C. Welding wire and drive parts are at welding voltage during operation −...
  • Page 14: Rating Label For Ce Products

    3-2. Rating Label For CE Products For label location see Section 5-2. 3-3. Symbols And Definitions Note Some symbols are found only on CE products. Amperes Degree Of Protection Set Up Purge Time Increase Primary Voltage OM-1500-10 Page 10 S/N: 50/60 50/60 IP 21...
  • Page 15: Section 4 − Introduction

    SECTION 4 − INTRODUCTION 4-1. Specifications Type of Input Welding Power Power Source Type 24 Volts ac Constant Voltage (CV) Single-Phase DC With 14-Pin And 10 Amperes Contactor Control 50/60 Hertz SECTION 5 − INSTALLATION 5-1. Site Selection Wire Welding Wire Feed Diameter Circuit...
  • Page 16: Rear Panel Connections And Rotating Drive Assembly

    5-2. Rear Panel Connections And Rotating Drive Assembly Tools Needed: 9/16, 5/8 in 3/16 in OM-1500-10 Page 12 14-Pin Control Cable - 10 ft (3.0 m) Shielding Gas Valve Fitting Connect customer-supplied gas hose with 5/8-18 right-hand threads. Shielding gas pressure not to exceed 90 PSI (620 kPa).
  • Page 17: 14-Pin Plug Plg12 Information

    5-3. 14-Pin Plug PLG12 Information Pin* 24 volts ac with respect to socket G. Contact closure to A completes 24 volts ac contactor control circuit. Circuit common for 24 volts ac circuit. +10 volts dc input from power source to wire feeder with respect to socket D. Remote control circuit common.
  • Page 18: Installing And Threading Welding Wire

    5-6. Installing And Threading Welding Wire Install wire spool. Adjust tension nut so wire is taut when wire feed stops. Pressure Indicator Scale Pressure Adjust Rear Rolls Be sure that outlet cable has proper size liner for the welding wire size. When installing gun, position...
  • Page 19: Setting Internal Dip Switches

    5-7. Setting Internal DIP Switches Position Settings And Results For DIP Switch S1 On PC1 Automatic Run-In (ON) Automatic Run-In (OFF) (Factory Default) S1-1 And S1-2 Off = Run-In speed is set using On = Run-In speed is approximately 1/2 weld wire potentiometer P1 located on Motor Board PC1.
  • Page 20: Equipment Dip Switch Settings (For Models With Meters Only)

    5-8. Equipment DIP Switch Settings (For Models With Meters Only) Remove wrapper. Install wrapper when finished. Digital Meter Functions Standard Standard High Speed High Speed Motor Motor Motor Motor Inches/Minute Meters/Minute Inches/Minute Meters/Minute Tools Needed: 1/4 in Ref. 802 946 OM-1500-10 Page 16...
  • Page 21: Section 6 − Operation

    SECTION 6 − OPERATION 6-1. Power Switch 6-2. Jog/Purge Power Switch 802 827-A Jog/Purge Push Button Wire Speed Control Gun Trigger Receptacle Pressing the Jog/Purge switch al- lows the operator to jog wire without energizing the weld power or gas valve circuit.
  • Page 22: Trigger Hold Switch

    6-3. Trigger Hold Switch Trigger Hold Switch Trigger hold allows the operator to weld with- out holding the gun trigger. 6-4. Voltage Control And Digital Meters (For Models With Meters Only) OM-1500-10 Page 18 To use the trigger hold function, place the trigger hold switch in the On position.
  • Page 23: Section 7 − Maintenance

    SECTION 7 − MAINTENANCE 7-1. Routine Maintenance 3 Months Replace unreadable labels. Replace Check cracked 14-pin cord. parts. 6 Months Blow out or vacuum inside. During heavy service, clean monthly. Notes Y Disconnect power before maintaining. Clean and tighten weld terminals.
  • Page 24: Diagnostics

    7-2. Diagnostics Display On Meter (If Equipped) HELP 11 HELP 12 HELP 13 HELP 14 *Since blink On time and blink Off time are equal in a four-blink cycle, the four−blink sequence appears as constant blinking. Error Indications Error conditions are indicated by LED3 on PC1 or on display (on models with meters).
  • Page 25: Troubleshooting

    7-3. Troubleshooting Trouble Wire feeds, shielding gas flows, but Check cable connections. Check cables for continuity, and repair or replace cables if necessary (see electrode wire is not energized. Section 5-2). Wire feeder is on, display does not light Check and reset circuit breaker at welding power source. up, motor does not run, gas valve and welding power source contactor do not pull in.
  • Page 26: Section 8 − Electrical Diagram

    SECTION 8 − ELECTRICAL DIAGRAM 202 246-C Figure 8-1. Circuit Diagram OM-1500-10 Page 22...
  • Page 27 Notes OM-1500-10 Page 23...
  • Page 28: Section 9 − Parts List

    SECTION 9 − PARTS LIST Fig 9-3 Fig 9-2 OM-1500-10 Page 24 Figure 9-1. Main Assembly Hardware is common and not available unless listed. 802 943...
  • Page 29 Item Item Part Part ....159 647 ....159 646 .
  • Page 30 Nameplate, Lower (CE Version) Hardware is common and not available unless listed. Quantity Model S-74S S-74D ......
  • Page 31 ........Quantity Model S-74S S-74D ... .
  • Page 32 ..........Motor, Gear 1/8Hp 24VDC Standard Speed Motor, Gear 1/8Hp 24VDC High Speed (Optional On S-74D) ..
  • Page 33 Screw, Cap Stl Hexhd .375-16 X 1.250 Quantity Model S-74S S-74D ........
  • Page 34 Guide Intermediate Guide Inlet Table 9-1. Drive Roll And Wire Guide Kits OM-1500-10 Page 30...
  • Page 35 Warranty Questions? LIMITED WARRANTY − Subject to the terms and conditions Call below, Miller Electric Mfg. Co., Appleton, Wisconsin, warrants to 1-800-4-A-MILLER its original retail purchaser that new Miller equipment sold after the effective date of this limited warranty is free of defects in for your local material and workmanship at the time it is shipped by Miller.
  • Page 36: Options And Accessories

    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. 2006 Miller Electric Mfg. Co. 2006−01 Miller Electric Mfg. Co. An Illinois Tool Works Company 1635 West Spencer Street Appleton, WI 54914 USA International Headquarters−USA...

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