Instruction/ maintenance manual of the product D-74S Miller Electric
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Visit our website at www.MillerWelds.com D-74S, D-74D Processes Description MIG (GMA W) W elding Flux Cored (FCA W ) Welding (Gas- And Self-Shielded) Wire Feeder OM-1500-6 206 805F May 2005.
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. T o locate your nearest distributor or service agency call 1-800-4-A-Miller , or visit us at www .
T ABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
dec_con1_1 1/02 Declaration of Conformity for European Community (CE) Products This information is provided for units with CE certification (see rating label on unit). Note Manufacturer ’s Name: Miller Electric Mfg. Co. Manufacturer ’s Address: 1635 W .
OM-1500-6 Page 1 SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som _3/05 Y W arning: Protect yourself and others from injury — read and follow these precautions. 1-1. Symbol Usage Means W arning! W atch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols.
OM-1500-6 Page 2 Arc rays from the w elding process produce intense visible and invisible (ultraviolet and infrared) rays that can burn eyes and skin. Sparks fly off from the weld.
OM-1500-6 Page 3 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.
OM-1500-6 Page 4 1-5. Principal Safety Standards Safety i n W elding, Cutting, and Allied Processes, ANSI Standard Z49.1, from Global Engineering Documents (phone: 1-877-413-5184, website: www .
OM-1500-6 Page 5 SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE A V ANT UTILISA TION som _3/05 Y A vertissement : se protéger et protéger les autres contre le risque de blessure — lire et respecter ces consignes.
OM-1500-6 Page 6 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.
OM-1500-6 Page 7 2-3 . Dangers s upplé mentaire s e n rela t i on a v ec l’installa tion, l e fonctionneme nt e t la maintenance Risque D’INCENDIE OU D’EXPLO- SION. D Ne pas placer l’appareil sur , au-dessus ou à proximité de surfaces inflammables.
OM-1500-6 Page 8 2-5. Princi pales n ormes de sécu rité Safety in W elding, Cutting, and Allied Processes, ANSI Standard Z49.1, de Global Engineering Documents (téléphone : 1-877-413-5184, site In- ternet : www .
OM-1500-6 Page 9 SECTION 3 − DEFINITIONS 1 1.1 1.2 1.3 3 3.1 3.2 3.3 4 4.1 + 2 2.1 2.2 + + 56 + 2.3 S-178 936 A. W arning! Watch Out! There are possible hazards as shown by the symbols. B. Drive rolls can injure fingers. C. W elding wire and drive parts are at welding voltage during operation − keep hands and metal objects clear .
OM-1500-6 Page 10 ST-178 794-A 50/60 S/N: 24 10.0 Hz 50/60 IP 21 V 100 A 750 X 100 % V U 1 = A I 1 = 1 U 2 = I 2 = 3-2. Rating Label For CE Products For label location see Section 5-3. 3-3. Symbols And Definitions Some symbols are found only on CE products.
OM-1500-6 Page 1 1 SECTION 4 − INTRODUCTION 4-1. Specifications T ype of Input Power W elding Power Source T ype Wire Feed Speed Range Wire Diameter Range W elding Circuit Rating IP Rating Overall D.
OM-1500-6 Page 12 5-2. Equipment Connection Diagrams 1 W elding Power Source 2 Contactor Control/Power Cord 3 Positive (+) Weld Cable 4 Negative ( − ) W eld Cable 5 W orkpiece 6 Welding Gun 7 Wire Feeder 8 Gas Hose 9 Gas Cylinder and Regulator (Customer Supplied) .
OM-1500-6 Page 13 5-3. Rear Panel Connections And Rotating Drive Assembly 803 067 / 802 825-A 2 1 14-Pin Control Cable - 10 Ft (3.0 m) 2 Shielding Gas V alve Fittings Requires fitting with 5/8-18 right- hand threads. Connect customer- supplied gas hose.
OM-1500-6 Page 14 5-4. 14-Pin Plug Information Pin* Pin Information A 24 volts ac with respect to socket G. A J K B Contact closure to A completes 24 volts ac contactor control circuit. A J B K I L G Circuit common for 24 volts ac circuit. C L N H D M G C +10 volts dc input from power source to wire feeder with respect to socket D.
OM-1500-6 Page 15 5-7. Installing And Threading Welding Wire Ref. 156 929-A / Ref. 150 922 / Ref. 156 930 / S-0627-A T ools Needed: . For best wire feeding performance, be sure that the outlet cable has the proper size liner for the welding wire size being used.
OM-1500-6 Page 16 5-8. Setting Internal DIP Switches Position Settings And Results For DIP Switch S1 On PC1 And PC101 On = Current detect over- ride. For welding power sources that don’t provide current feedback through the 14-pin receptacle. Run- in is inactive.
OM-1500-6 Page 17 T ools Needed: 1/4 in 5-9. Optional Equipment DIP Switch Settings 12 3 45 Or Or High Speed Motor Meters/Minute High Speed Motor Inches/Minute Standard Motor Meters/Minute Standard Motor Inches/Minute Digital Meter Functions 12 3 45 12 3 45 12 3 45 803 069 Remove wrapper .
OM-1500-6 Page 18 SECTION 6 − OPERA TION 6-1. Power Switch 1 Power Switch 1 Ref. 803 065 1 Left/Right Select Switch Pressing the Left/Right Select switch allows the operator to choose which side of the unit’ s con- trols will operate. 6-2. Left/Right Select Switch 1 Ref.
OM-1500-6 Page 19 6-4. T rigger Hold Switch 1 T rigger Hold Switches T rigger hold allows the operator to weld without holding the gun trigger . • T o use the trigger hold function, place the trigger hold switch in the On position.
OM-1500-6 Page 20 SECTION 7 − MAINTENANCE 7-1. Routine Maintenance Y Disconnect power before maintaining. 3 Months Replace unreadable labels. Clean and tighten weld terminals. Repair or replace cracked weld cable. Check 14-pin cord. Check gas hose and fittings.
OM-1500-6 Page 21 7-2. Diagnostics 803 063-A 1 LED3 On Right Side Motor Control Board PC1 2 LED3 On Left Side Motor Control Board PC101 3 LED3 On Dual Board PC70 2 1 3 Display On Optional Meter LED3 S.
OM-1500-6 Page 22 7-3. T roubleshooting Y Disconnect power before troubleshooting T rouble Remedy Wire feeds, shielding gas flows, but electrode wire is not energized. Check cable connections. Check cables for continuity , and repair or replace cables if necessary (see Section 5-3).
OM-1500-6 Page 23 Notes.
OM-1500-6 Page 24 SECTION 8 − ELECTRICAL DIAGRAM Figure 8-1. Circuit Diagram.
OM-1500-6 Page 25 204 716-B.
OM-1500-6 Page 26 SECTION 9 − P ARTS LIST 803 050-A . Hardware is common and not available unless listed. 14 6 7 10 9 8 11 5 12 11 10 15 19 20 16 17 18 3 2 1 22 4 Fig.
OM-1500-6 Page 27 Description Part No. Item No. Figure 9-1. Main Assembly Quantity 1 159 647 Insulator , Motor Clamp 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 159 646 Clamp, Motor Base 2 .
OM-1500-6 Page 28 803 049-C . Hardware is common and not available unless listed. 7 3 4 5 6 8 9 10 11 12 5 13 14 16 4 2 15 19 18 17 26 20 21 22 22 21 23 24 25 1 27 Figure 9-2. Control Box Quantity Description Part No. Dia. Mkgs. Item No. Model D-74S D-74D Figure 9-2.
OM-1500-6 Page 29 Quantity Description Part No. Dia. Mkgs. Item No. Model D-74S D-74D Figure 9-2. Control Box (Continued) 18 R1, R101 073 562 Potentiometer, cp std slot 1t 2. w 10k linear D-74S 2 0 . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-1500-6 Page 30 See T able 9-1 For Drive Roll & Wire Guide Kits . Hardware is common and not available unless listed. 803 790-A 20 11 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 1 2 3 4 5 6 22 21 19 18 17 16 15 14 19 13 12 11 9 10 8 7 6 5 4 3 2 1 Figure 9-3.
OM-1500-6 Page 31 Quantity Description Part No. Dia. Mkgs. Item No. Model D-74S D-74D Figure 9-3. Drive Assembly , Wire (Continued) 203 642 Pressure Arm, R & V ert L 4 Roll (consisting of) 1 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-1500-6 Page 32 .023-.025 in. 0.6 mm 151 024 087 130 .030 in. 0.8 mm 151 025 053 695 .035 in. 0.9 mm 151 026 053 700 151 036 072 000 151 052 132 958 .045 in. 1.1/1.2 mm 151 027 053 697 151 037 053 701 151 053 132 957 151 070 083 489 .052 in. 1.3/1.4 mm 151 028 053 698 151 038 053 702 151 054 132 956 151 071 083 490 1/16 in.
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Warranty Questions? Call 1-800-4-A-MILLER for your local Miller distributor. miller_warr 1/05 Y our distributor also gives you ... Service Y ou always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours. Support Need fast answers to the tough welding questions? Contact your distributor .
PRINTED IN USA © 2005 Miller Electric Mfg. Co. 1/05 Miller Elect ric Mf g. Co. An Illinois T ool Wo rks Co mpany 1635 W es t Spencer St reet Applet on, WI 5 4914 USA International He adquarters − U.
An important point after buying a device Miller Electric D-74S (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Miller Electric D-74S yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Miller Electric D-74S - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Miller Electric D-74S you will learn all the available features of the product, as well as information on its operation. The information that you get Miller Electric D-74S will certainly help you make a decision on the purchase.
If you already are a holder of Miller Electric D-74S, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Miller Electric D-74S.
However, one of the most important roles played by the user manual is to help in solving problems with Miller Electric D-74S. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Miller Electric D-74S along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
