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D-74DX
OM-1500-7
204 129H
2007−07
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 D-74DX

  • Page 1 Visit our website at www.MillerWelds.com D-74DX OM-1500-7 204 129H 2007−07 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 OM-1500-7 Page 2 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: California Proposition 65 Warnings

    1-4. California Proposition 65 Warnings Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to cause birth defects and, in some cases, cancer. (California Health & Safety Code Section 25249.5 et seq.) Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and birth defects or other...
  • Page 9: Section 2 − Consignes De Sécurité − Lire Avant Utilisation

    SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION Se protéger et protéger les autres contre le risque de blessure — lire et respecter ces consignes. 2-1. Symboles utilisés DANGER! − Indique une situation dangereuse qui si on l’évite pas peut donner la mort ou des blessures graves. Les dangers possibles sont montrés par les symboles joints ou sont expliqués dans le texte.
  • Page 10 Il reste une TENSION DC NON NÉGLIGEABLE dans les sources de soudage onduleur quand on a coupé l’alimentation. D Arrêter les convertisseurs, débrancher le courant électrique et décharger les condensateurs d’alimentation selon les instructions indiquées dans la partie Entretien avant de toucher les pièces. DES PIÈCES CHAUDES peuvent provoquer des brûlures graves.
  • Page 11: Dangers Supplémentaires En Relation Avec L'installation, Le Fonctionnement Et La Maintenance

    ACCUMULATIONS risquent de provoquer des blessures ou même la mort. D Fermer l’alimentation du gaz protecteur en cas de non-utilisation. D Veiller toujours à bien aérer les espaces confi- nés ou se servir d’un respirateur d’adduction d’air homologué. LES CHAMPS MAGNETIQUES peuv- ent affecter des implants médicaux.
  • Page 12: Proposition Californienne 65 Avertissements

    LES FILS DE SOUDAGE peuvent provoquer des blessures. D Ne pas appuyer sur la gâchette avant d’en avoir reçu l’instruction. D Ne pas diriger le pistolet vers soi, d’autres per- sonnes ou toute pièce mécanique en enga- geant le fil de soudage. DES ORGANES MOBILES peuvent provoquer des blessures.
  • Page 13: 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 Internet : 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 14 OM-1500-7 Page 10...
  • Page 15: 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 16: Rating Label For Ce Products

    3-2. Rating Label For CE Products For label location see Section 5-3. 3-3. WEEE Label (For Products Sold Within The EU) 3-4. Symbols And Definitions Some symbols are found only on CE products. Amperes Degree Of Protection Set Up Purge Time Increase Primary Voltage...
  • Page 17: 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 Feed Speed Wire Diameter Range Range...
  • Page 18: Equipment Connection Diagrams

    5-2. Equipment Connection Diagrams OM-1500-7 Page 14 Welding Power Source Contactor Control/Power Cord Positive (+) Weld Cable Negative (−) Weld Cable Workpiece Welding Gun Wire Feeder Gas Hose Gas Cylinder and Regulator (Customer Supplied) Shielding gas pressure not to exceed 100 PSI (689 kPa). 803 073...
  • Page 19: Rear Panel Connections And Rotating Drive Assembly

    5-3. Rear Panel Connections And Rotating Drive Assembly Tools Needed: 9/16, 5/8 in 3/16 in 14-Pin Control Cable - 10 Ft (3.0 m) Shielding Gas Valve Fittings Requires fitting with 5/8-18 right- hand threads. Connect customer- supplied gas hose. Weld Cable Terminal Jumper Weld Cable Weld Cable Drive Assembly...
  • Page 20: 14-Pin Plug Information

    5-4. 14-Pin Plug 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 21: Installing And Threading Welding Wire

    5-7. Installing And Threading Welding Wire Install wire spool. Adjust tension nut so wire is taut when wire feed stops. Pressure Indicator Pressure Scale Adjust Rear Rolls For best wire feeding performance, be sure that the outlet cable has the proper size liner for the welding wire size being used.
  • Page 22: Setting Internal Dip Switches

    5-8. Setting Internal DIP Switches When DIP switch positions are changed, the unit must be turned Off and then On again in order for the new settings to be active. DIP switches are only read on power up. OM-1500-7 Page 18 In the DIP switch S1 illustrations, the elevated slider on each switch is shown in white.
  • Page 23: Power Source Selection Menu

    5-9. Power Source Selection Menu Non-CE Model Shown Program Volts Wire Speed Start Crater Pre/Postflow Sequence * * Power Source Upper Display Deltaweld 452 dELT Deltaweld 302 dELT Deltaweld 652 dELT Dimension 302 Dimension 452 Dimension 652 Dimension 1000 XMT 304 XMT 456 Invision 354MP I354...
  • Page 24: Section 6 − Operation

    SECTION 6 − OPERATION 6-1. Operational Terms The following is a list of terms and their definitions as they apply to this wire feeder: General Terms: Cold Wire Jog Feeding wire without contactor or gas valve being energized. A portion of the weld program, such as preflow, run-in, start, weld, crater, burnback, and postflow. Sequence Weld Program A group of sequences that make up a weld cycle.
  • Page 25: Jog/Purge Switch

    6-4. Jog/Purge Switch Pressing the Jog/Purge switch allows the op- erator to jog wire without energizing the weld power or gas valve circuit. The unit provides the ability to jog the wire feeder by means of the gun trigger or the Jog/Purge switch.
  • Page 26: Front Panel Controls

    6-5. Front Panel Controls Program Section Start Crater Pre/Postflow Sequence Section 6-11 Section Section 6-11 OM-1500-7 Page 22 Nameplate For Non-CE Models Volts Time (sec) Wire Speed Amps Dual Schedule Trigger Hold Adjust Setup Section Section 6-10 Nameplate For CE Models Section Section 6-10...
  • Page 27: Program Push Button

    6-6. Program Push Button Non-CE Models Program 6-7. Upper Display To set the correct voltage range for a particular power source, see Section 5-9 for power source selection menu, or Section 6-12 for V-Min And V-Max adjustments. Upper Display The upper display shows voltage or time. The unit displays both preset and actual arc voltage.
  • Page 28: Lower Display

    6-8. Lower Display Lower Display The lower display shows wire speed or amperage. The unit displays and adjusts only preset wire speed at idle. When the unit is in a welding state, actual wire speed is displayed for the active welding sequence. Lower Display Push Button Press button to choose between wire speed or amperage functions.
  • Page 29: Adjust Control

    6-10. Adjust Control Adjust Non-CE Models 6-11. Sequence Push Button Start Crater Pre/Postflow Sequence Non-CE Models For more information on Setting Sequence Parameters see Section 7-1. The Sequence push button allows the selection of welding sequences. Five weld- ing sequences are available. The default sequence is the Weld sequence.
  • Page 30: Auxiliary Menus

    6-12. Auxiliary Menus Program Start Crater Pre/Postflow Sequence OM-1500-7 Page 26 Non-CE Models Volts Time (sec) Wire Speed Amps Trigger Hold Dual Schedule Adjust Setup CE Models Program Display Program Push Button Sequence Push Button Upper Display Upper Display Push Button Lower Display Lower Display Push Button Adjust Control...
  • Page 31 6-12 Auxiliary Menus (Continued) Reset To Factory Settings A reset menu is displayed if the following four push buttons are pressed simultaneously: Program, Sequence, upper display, and Set- up. The upper display indicates “WIPE” . The lower display indicates “OFF”. The lower push button is active indicating that the Adjust control can be used to change the unit to “WIPE ON”.
  • Page 32 6-12 Auxiliary Menus (Continued) OPT1 If the Setup push button is pressed, the unit allows OPT1 to be disabled or enabled. The upper display shows “OPT1”. Lower dis- play shows “On” or “Off”. The Adjust Control is used to select either “On” or “Off”. “OPT1”...
  • Page 33: Section 7 − Setting Sequence Parameters

    SECTION 7 − SETTING SEQUENCE PARAMETERS 7-1. Sequence Parameters In A Program Sequence 1. Preflow 2. Run-In 3. Start 4. Weld 5. Crater 6. Burnback 7. Postflow X = Setting available. Preflow Time Run-In Start Preflow Trigger Pressed SECTION 8 − SETTING DUAL SCHEDULE PARAMETERS 8-1.
  • Page 34: Diagnostics

    8-2. Diagnostics Note: The error messages are shown on the upper and lower displays to indi- cate specific errors. Ex- planations are in the text below: LED3-Related Error Indications Error conditions are indicated by LED3 on PC1, PC101, and LED4 on PC70. To view LED3, 4 turn Off unit, remove wrapper, and turn unit On.
  • Page 35: Diagnostics For User Defined Options

    8-3. Diagnostics For User Defined Options OPT1 OPT2 Indicates a User Defined Option Error SECTION 9 − MAINTENANCE & TROUBLESHOOTING 9-1. Routine Maintenance 3 Months Replace unreadable labels. Replace Check cracked 14-pin cord. parts. 6 Months Blow out or vacuum inside.
  • Page 36: Troubleshooting

    9-2. Troubleshooting Trouble Wire feeds, shielding gas flows, but elec- Check interconnecting cord connections. If secure, check cord for continuity and repair or replace (see trode wire is not energized. Sections 5-2 and 5-3). Wire feeder is on, meter(s) do not light Check and reset circuit breaker at welding power source.
  • Page 37 Notes OM-1500-7 Page 33...
  • Page 38: Section 10 − Electrical Diagram

    SECTION 10 − ELECTRICAL DIAGRAM Figure 10-1. Circuit Diagram OM-1500-7 Page 34...
  • Page 39 204 144-C OM-1500-7 Page 35...
  • Page 40: Section 11 − Parts List

    SECTION 11 − PARTS LIST Hardware is common and not available unless listed. Fig.11−3 Fig.11−2 803 052-A Figure 11-1. Main Assembly OM-1500-7 Page 36...
  • Page 41 Item Part ....159 647 ....159 646 .
  • Page 42 Item Dia. Part Mkgs....204 722 ..... 134 464 .
  • Page 43 Item Dia. Part Mkgs....206 765 ....206 771 .
  • Page 44 Hardware is common and not available unless listed. See Table 11-1 For Drive Roll & Wire Guide Kits Item Dia. Part Mkgs....010 668 .
  • Page 45 Item Dia. Part Mkgs....182 156 ..... . 182 155 .
  • Page 46 Guide Intermediate Guide Inlet OM-1500-7 Page 42...
  • Page 47 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 48: 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. 2007 Miller Electric Mfg. Co. 2007−01 Miller Electric Mfg. Co. An Illinois Tool Works Company 1635 West Spencer Street Appleton, WI 54914 USA International Headquarters−USA...

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