Miller 300739 Owner's Manual
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Miller 300739 Owner's Manual

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D-74 MPa Plus
Control Box
CE And Non-CE Models
OM-273243J
2021−11
Processes
MIG (GMAW) Welding
MIG (GMAW-P) Welding
Flux Cored (FCAW) Welding
(Gas- And Self-Shielded)
Description
Wire Feeder
Aluminum Push/Pull Capable
File: MIG (GMAW)

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Summary of Contents for Miller 300739

  • Page 1 OM-273243J 2021−11 Processes MIG (GMAW) Welding MIG (GMAW-P) Welding Flux Cored (FCAW) Welding (Gas- And Self-Shielded) Description Wire Feeder Aluminum Push/Pull Capable D-74 MPa Plus Control Box CE And Non-CE Models For product information, File: MIG (GMAW) Owner’s Manual translations, and more, visit www.MillerWelds.com...
  • Page 2 We know you don’t have time to do it any other way. That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING ....... . . 1-1.
  • Page 4 DECLARATION OF CONFORMITY for European Community (CE marked) products. MILLER Electric Mfg. LLC, 1635 Spencer Street, Appleton, WI 54914 U.S.A. declares that the product(s) identified in this declaration conform to the essential requirements and provisions of the stated Council Directive(s), Commission Regulation(s) and Standard(s).

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

    SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som 2020−02 Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if Indicates special instructions.
  • Page 6 D Do not cut or weld on tire rims or wheels. Tires can explode if heat- FUMES AND GASES can be hazardous. ed. Repaired rims and wheels can fail. See OSHA 29 CFR 1910.177 listed in Safety Standards. D Do not weld on containers that have held combustibles, or on Welding produces fumes and gases.

  • Page 7: Additional Hazards For Installation, Operation, And Maintenance

    D Never weld on a pressurized cylinder − explosion will result. CYLINDERS can explode if damaged. D Use only correct compressed gas cylinders, regulators, hoses, and fittings designed for the specific application; maintain them Compressed gas cylinders contain gas under high and associated parts in good condition.

  • Page 8: California Proposition 65 Warnings

    H.F. RADIATION can cause interference. ARC WELDING can cause interference. D High-frequency (H.F.) can interfere with radio D Electromagnetic energy can interfere with navigation, safety services, computers, and sensitive electronic equipment such as communications equipment. computers and computer-driven equipment such as robots. D Have only qualified persons familiar with electronic equipment D Be sure all equipment in the welding area is electromagnetically perform this installation.

  • Page 9: Section 2 − Consignes De Sécurité − Lire Avant Utilisation

    SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION som_2020−02_fre Pour écarter les risques de blessure pour vous−même et pour autrui — lire, appliquer et ranger en lieu sûr ces consignes relatives aux précautions de sécurité et au mode opératoire. 2-1.
  • Page 10 D Déplacer toutes les substances inflammables à une distance de LES PIÈCES CHAUDES peuvent 10,7 m de l’arc de soudage. En cas d’impossibilité les recouvrir provoquer des brûlures. soigneusement avec des protections homologués. D Ne pas toucher à mains nues les parties chaudes. D Ne pas souder dans un endroit là...

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

    D Protéger les bouteilles de gaz comprimé d’une chaleur excessive, Les CHAMPS ÉLECTROMAGNÉTIQUES (CEM) des chocs mécaniques, des dommages physiques, du laitier, des peuvent affecter les implants médicaux. flammes ouvertes, des étincelles et des arcs. D Placer les bouteilles debout en les fixant dans un support station- D Les porteurs de stimulateurs cardiaques et naire ou dans un porte-bouteilles pour les empêcher de tomber ou autres implants médicaux doivent rester à...

  • Page 12: Proposition Californienne 65 Avertissements

    D Effectuer régulièrement le contrôle et l’entretien de l’installation. LIRE LES INSTRUCTIONS. D Maintenir soigneusement fermés les portes et les panneaux des sources de haute fréquence, maintenir les éclateurs à une distan- D Lire et appliquer les instructions sur les ce correcte et utiliser une terre et un blindage pour réduire les étiquettes et le Mode d’emploi avant l’instal- interférences éventuelles.

  • Page 13: Section 3 − Definitions

    SECTION 3 − DEFINITIONS 3-1. Additional Safety Symbols And Definitions Some symbols are found only on CE products. Warning! Watch Out! There are possible hazards as shown by the symbols. Safe1 2012−05 Do not discard product (where applicable) with general waste. Reuse or recycle Waste Electrical and Electronic Equipment (WEEE) by disposing at a designated collection facility.
  • Page 14 Welding sparks can cause fires. Have a fire extinguisher nearby, and have a watchperson ready to use it. Safe63 2012−06 Do not weld on drums or any closed containers. Safe16 2017−04 Do not remove or paint over (cover) the label. Safe20 2017−04 Drive rolls can injure fingers.

  • Page 15: Miscellaneous Symbols And Definitions

    3-2. Miscellaneous Symbols And Definitions Some symbols are found only on CE products. Rated Welding Amperes Output Current Direct Current (DC) Program Duty Cycle Degree Of Protection Preflow Time Primary Current Hertz Line Connection Wire Type Set Up Conventional Arc Length Increase Load Voltage Process...

  • Page 16: Section 4 − Specifications

    4-3. Information About Default Weld Parameters And Settings NOTICE − Each welding application is unique. Although certain Miller Electric products are designed to determine and default to certain typical welding parameters and settings based upon specific and relatively limited application variables input by the end user, such default settings are for reference purposes only;...

  • Page 17: Section 5 − Installation

    SECTION 5 − INSTALLATION 5-1. Equipment Connection Diagram Welding Power Source Remote 14 Connection Positive (+) Weld Output Cable Negative (−) Weld Output Cable Workpiece Weld Control Boom Swivel 10 Pipe Post And Base 11 Gas Hose 12 Gas Supply and Regulator (Customer Supplied) Shielding gas pressure not to exceed 100 PSI (689 kPa).

  • Page 18: Installing Control Box And Adjusting Tilt

    5-2. Installing Control Box And Adjusting Tilt Weld Control Bracket Screw Bracket and screws are installed onto bottom of control at factory. Swivel Loosen screws. Place control on swivel and slide forward. Tighten screws. Tilt Bracket Rear Pivot Screw Front Screw Loosen rear pivot screw.

  • Page 19: 14-Pin Plug Information For Connecting Wire Feeder To Power Source

    5-4. 14-Pin Plug Information For Connecting Wire Feeder To Power Source Pin* Pin Information 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.

  • Page 20: Section 6 − Operation

    SECTION 6 − OPERATION 6-1. Power Switch Power Switch Ref. 252426-C 6-2. Jog/Purge Switch Jog/Purge Switch Ref. 252426-C Pressing the Jog/Purge switch allows the op- mum of two minutes. If the gun trigger is still control when the unit is jogging wire. The erator to jog wire without energizing the weld activated after two minutes, the jog opera- unit displays jog speed when the unit is be-...

  • Page 21: Front Panel Controls

    6-3. Front Panel Controls Ref. 271382-B Left Display Adjust Control Right Start Push Button (See Section 6-4) (See Section 6-6) (See Section 6-8) Right Display Program Select Push Button Crater Push Button (See Section 6-5) (See Section 6-11) (See Section 6-9) Adjust Control Left Setup Push Button Left/Right Display Push Button...

  • Page 22: Left Display

    6-4. Left Display Left Side Indicator The unit displays both preset and actual arc To set the correct voltage range for a par- voltage. When the unit is in a welding state, ticular power source, see Section 6-12 − Left Display actual arc voltage is displayed.

  • Page 23: Setup Push Button

    6-7. Setup Push Button Setup Push Button Setup LED When the Setup button is pressed, the Setup push button LED turns on. Press button to enter basic setup features. Hold button to enter more advanced setup features 6-8. Start Push Button Start Push Button Start LED Press button to activate/deactivate...

  • Page 24: Power Source Selection Menu

    6-12. Power Source Selection Menu Left Display Right Display When the feeder is turned on, the Power Source Selection Menu allows the operator to se- lect a default power source. Selecting a default power source, automatically sets the correct Vmin and Vmax set- tings for adjusting the output voltage of the power source.

  • Page 25: Operational Terms

    6-13. 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. Sequence A portion of the weld program, such as preflow, run-in, start, weld, crater, burnback, and postflow. Weld Program A group of sequences that make up a weld cycle.

  • Page 26: Section 7 − Setting Sequence Parameters

    SECTION 7 − SETTING SEQUENCE PARAMETERS 7-1. Sequence Parameters In A Program Sequence Parameters Volts Seconds Inches 1. Preflow 0-5.0 2. Run-In x0.1-x1.00 3. Start .1-.5 4. Weld 0-100.0 5. Crater 0.00-5.00 6. Postflow 0.0-10.0 7. Retract 0.0-1.5 X = Setting available. Weld Time Crater Retract...

  • Page 27: Section 8 − Programming

    SECTION 8 − PROGRAMMING 8-1. Setup Menu To enter the SETUP MENU press and re- make this function operational. If gun trig- Preflow (PRE) − The amount of time that lease the SETUP button. The SETUP ger is released during welding the unit goes the shielding gas will flow after the trigger MENU INDICATOR and the SETUP into trigger hold - pressing and holding trig-...

  • Page 28: Setup Menu Level 2

    8-2. Setup Menu Level 2 To enter the SETUP MENU LEVEL 2 press process. If the power source weld process When set to (NO), (PROF) will not appear and hold the SETUP button. The SETUP is set to PULSED MIG, the minimum in the Setup Menu.

  • Page 29: Setting A Start Sequence In Synergic Pulse

    8-3. Setting A Start Sequence In Synergic Pulse To turn on a Start sequence, press the To exit the START MENU, press and re- Example: If the weld arc length is set to 50 START button. START lease the START button. and ARC.L is X0.50, the Start Arc Length is INDICATOR will illuminate indicating Start Items that can be adjusted in this menu are:...

  • Page 30: Setting A Start Sequence In Non−Synergic Pulse Or Mig

    8-4. Setting A Start Sequence In Non−Synergic Pulse Or MIG To turn on a Start sequence, press the Knob to change menu item values shown When MIG is selected in Setup Menu START button. START in the RIGHT DISPLAY. Level 1 the start arc length setting will INDICATOR will illuminate indicating Start be replaced by Start Voltage (VOLT).

  • Page 31: Setting A Crater Fill Sequence In Synergic Pulse

    8-5. Setting A Crater Fill Sequence In Synergic Pulse To turn on Crater Fill, press the CRATER lease the CRATER button. When the PULS option in the SETUP button. The CRATER ON INDICATOR will MENU LEVEL 2 is set to VOLT, the Items that can be adjusted in this menu are: illuminate indicating Crater Fill is active.

  • Page 32: Setting A Crater Fill Sequence In Non−Synergic Pulse Or Mig

    8-6. Setting A Crater Fill Sequence In Non−Synergic Pulse Or MIG To turn on Crater Fill, press the CRATER To exit the CRATER MENU press and re- ting is dependent on the power source or button. The CRATER ON INDICATOR will lease the CRATER button.

  • Page 33: Profile Pulse

    8-7. Profile Pulse Profile Pulse optimizes Aluminum weld set to (YES). See section 8-2. unit is set to for welding. Range of this set- bead appearance by producing welds with ting is (X0.00 to X0.30). Example: If the wire Profile Pulse Items that can be adjusted in consistently spaced ripple patterns, similar feed speed is 200 and (P.WFS) is set to the Setup Menu are:...

  • Page 34: Section 9 − Maintenance & Troubleshooting

    SECTION 9 − MAINTENANCE & TROUBLESHOOTING 9-1. Routine Maintenance Disconnect power before maintaining. n = Check ~ = Clean l = Replace Every Spool of Wire or Wire Change n~ Gun Liner Every Months l Unreadable Labels ~ Weld Terminals nl Weld Cable l Cracked Parts n 14-Pin Cord...

  • Page 35: Troubleshooting

    9-3. Troubleshooting Disconnect power before troubleshooting. Trouble Remedy Secure plug from gun control cable into Gun Control receptacle. Pressing gun trigger does not energize feeder. Shielding gas does not flow and Have nearest Factory Authorized Service Agent check optional water flow switch, if applicable. wire feeder does not feed.

  • Page 36: Section 10 − Electrical Diagram

    SECTION 10 − ELECTRICAL DIAGRAM Figure 10-1. Circuit Diagram OM-273243 Page 32...
  • Page 37 247591-B OM-273243 Page 33...

  • Page 38: Section 11 − Parts List

    SECTION 11 − PARTS LIST Hardware is common and not available unless listed. 252430-C Figure 11-1. D-74 MPa Plus Remote Control Box Item Dia. Part Mkgs. Description Figure 11-1. D-74 MPa Plus Remote Control Box ....+207496 Wrapper, Feeder .
  • Page 39 Item Dia. Part Mkgs. Description Figure 11-1. D-74 MPa Plus Remote Control Box (Continued) ....207540 Bracket, Mtg Control Box D-74 Swingarc ......
  • Page 40 Notes...
  • Page 41 Notes Start Your Professional Over 80,000 trained 400 Trade Square East, Troy, Ohio 45373 Welding Career Now! since 1930! 1-800-332-9448 www.welding.org...
  • Page 42 Notes...
  • Page 43 Effective January 1, 2021 (Equipment with a serial number preface of NB or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other guarantees or warranties expressed or implied. LIMITED WARRANTY − Subject to the terms and conditions TIG Torches (No Labor) below, Miller Electric Mfg.
  • Page 44 Contact the Delivering Carrier to: 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. © ORIGINAL INSTRUCTIONS − PRINTED IN USA 2021 Miller Electric Mfg. LLC 2021−01...

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