Hobart Welding Products OM-925 manual

Processes OM-925 217 694E 2008 − 10 Handler 140 And H-10 Gun Arc W elding Power Source And Wire Feeder Description MIG (GMAW) W elding Flux Cored (FCA W ) W elding R[...]

Hobart W elders manufactures a full line of welders and welding related equipment. For information on other quality Hobart products, contact your local Hobart distributor to receive the latest full line catalog or individual specification sheets. T o locate your nearest distributor or service agency call 1-877-Hobart1 or visit our website at www .H[...]

T ABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2. Arc W elding Hazards 1 . . . . . . . [...]

T ABLE OF CONTENTS SECTION 9 − MIG WELDING (GMA W) GUIDELINES 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1. T ypical MIG Process Connections 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2. T ypical MIG Process Control Settin[...]

OM-925 Page 1 SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som _2007 − 04 7 Protect yourself and others from injury — read and follow these precautions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if not avoided, will result in death or serious injury . The possible hazards are shown in the adjoining symbols or [...]

OM-925 Page 2 W elding produces fumes and gases. Breathing these fumes and gases can be hazardous to your health. FUMES AND GASES can be hazardous. D Keep your head out of the fumes. Do not breathe the fumes. D If inside, ventilate the area and/or use local forced ventilation at the arc to remove welding fumes and gases. D If ventilation is poor , [...]

OM-925 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. F A[...]

OM-925 Page 4 1-4. California Proposition 65 W arnings W elding 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[...]

OM-925 Page 5 SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE A V ANT UTILISA TION fre_som_2007 − 04 7 Se protéger et protéger les autres contre le risque de blessure — lire et respecter ces consignes. 2-1. S ym bol es u t ilisés DANGER! − Indique une situation dangereuse qui si on l’évite pas peut donner la mort ou des blessures graves.[...]

OM-925 Page 6 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 CHAUDE[...]

OM-925 Page 7 LES ACCUMULA TIONS DE GAZ risquent de provoquer des blessures ou même la mort. D Fermer l’alimentation du gaz protecteur en cas de non-utilisation. D V eiller 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 médi[...]

OM-925 Page 8 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. D S’abstenir de toucher des o[...]

OM-925 Page 9 2-5. P r i nc ip al es n or me s d e sé cur it é Safety i n W elding, 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 W elding and Cut- ting of Containers and Piping , American W[...]

OM-925 Page 10[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 1 1 SECTION 3 − DEFINITIONS 3-1. Symbols And Definitions A Amperage V V oltage Hz Hertz Negative Positive Direct Current (DC) Single Phase Input Output V oltage Input Of f On Do Not Switch While W elding Gas Metal Arc W elding (GMAW) Wire Feed SECTION 4 − SPECIFICA TION[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 12 4-2. Duty Cycle And Overheating Duty Cycle is percentage of 10 minutes that unit can weld at rated load without overheating. If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. W ait fifteen minutes for unit to cool. Reduce amperage or duty cycle [...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 13 4-3. V olt-Ampere Curves The volt-ampere curves show the minimum and maximum voltage an d amperage output capabilities of the welding power source. Curves of other settings fall between the curves shown. ssb1.1 10/91 − 217 624-A RANGE 4 RANGE 3 RANGE 2 RANGE 1 0 10 20 [...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 14 SECTION 5 − INST ALLA TION 5-1. Installing Welding Gun 803 71 1-A 1 Drive Assembly 2 Gun Securing Thumbscrew 3 Gun End Loosen thumbscrew . Insert end of gun through opening in front panel until it bottoms against drive assembly. Tighten thumbscrew . W elding gun must b[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 15 5-3. Process/Polarity T able Process Polarity Cable Connections Cable T o Gun Cable T o Work GMA W − Solid wire with shield- ing gas DCEP − Reverse polarity Connect to positive (+) out- put terminal Connect to negative ( − ) output terminal FCAW − Self-shielding [...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 16 5-5. Installing Gas Supply Obtain gas cylinder and chain to running gear , wall, or other stationary support so cylinder cannot fall and break off valve. 1 Cap 2 Cylinder V alve Remove cap, stand to side of valve, and open valve slightly. Gas flow blows dust and dirt fro[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 17 5-6. Selecting A Location And Connecting Input Power 1 Rating Label 2 Grounded Receptacle A 1 15 volt, 20 ampere individual branch circuit protected by time-delay fuses or circuit breaker is required. 3 Plug From Unit Select extension cord of 12 AWG for up t o 50 ft (15 [...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 18 5-7. Installing Wire Spool And Adjusting Hub T ension When a slight force is needed to turn spool, tension is set. 1/2 in T ools Needed: Installing 8 in (203 mm) Wire Spool Installing 4 in (102 mm) Wire Spool When a slight force is needed to turn spool, tension is set. R[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 19 5-8. Installing Contact Tip And Nozzle T ools Needed: Ref. 802 399-A ! T ur n off welding power source. 1 Nozzle Remove nozzle. 2 Contact Tip 3 Tip Adapter Thread welding wire through gun (see Section 5-9). Slide contact tip over wire and tighten tip into tip adapter . I[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 20 5-9. Threading Welding Wire 1 Wire Spool 2 Welding Wire 3 Inlet Wire Guide 4 Pressure Adjustment Knob 5 Drive Roll 6 Gun Conduit Cable Lay gun cable out straight. T ools Needed: Pull and hold wire; cut off end. Open pressure assembly. Make sure feed roll is set to correc[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 21 Remove gun nozzle and contact tip. Ref. 803 714-A WOOD Feed wire to check drive roll pressure. Tighten knob enough to prevent slipping. Cut off wire. Close door . Press gun trigger until wire comes out of gun. (Keep gun cable as straight as possible.) Turn power on. Be s[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 22 SECTION 6 − OPERATION 6-1. Controls 1 Wire Speed Control Us e control to select a wire feed speed. As V oltage switch setting increases, wire speed range also increases (see weld setting label in welding power source or Section 6-2). 2 Power Switch 3 V oltage Switch Th[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 23 Notes 16 Gauge (.063 in) 22 Gauge (.031 in) 24 Gauge (.025 in) 20 Gauge (.037 in) 18 Gauge (.050 in) 14 Gauge (.078 in) 1/8 in (.125 in) 3/16 in (.188 in) 1/4 in (.25 in) 5/16 in (.313 in) 3/8 in (.375 in) 1/2 in (.5 in) MA TERIAL THICKNESS REFERENCE CHART[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 24 6-2. W eld Parameter Chart[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 25 217 618-A[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 26 SECTION 7 − MAINTENANCE & TROUBLESHOOTING 7-1. Routine Maintenance ! Disconnect power before maintaining. . Maintain more often during severe condi- tions. n = Check Z = Change ~ = Clean l = Replace * T o be done by Factory Authorized Service Agent Reference 3 Mont[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 27 7-4. Changing Drive Roll Or Wire Inlet Guide 1 Inlet Wire Guide Securing Screw 2 Inlet Wire Guide Loosen screw . Slide tip as close to drive rolls as possible without touching. T ighten screw . 3 Drive Roll The drive roll consists of two dif fer- ent sized grooves. The s[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 28 7-6. Cleaning Or Replacing Gun Liner Ref. 802 446-A 8 mm / 10mm ! Disconnect gun from unit. T ools Needed: T o Reassemble Gun: Insert new liner . Install wire outlet guide so that 1/8 in (3 mm) of liner sticks out. Hand tighten outlet guide, and then tighten two full tur[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 29 7-7. Replacing Switch And/Or Head T ube Ref. 800 795-C T ools Needed: 19 mm Remove handle locking nut. Slide handle. Secure head tube in vice. Loosen jam nut. Remove from vice and turn head tube out by hand. Hand-tighten head tube into cable connector . Place head tube i[...]

. A complete Parts List is available at www .HobartW elders.com OM-925 Page 30 7-8. T roubleshooting T able T rouble Remedy No weld output; wire does not feed; fan does not run. Secure power cord plug in receptacle (see Section 5-6). Replace building line fuse or reset circuit breaker if open. Place Power switch in On position (see Section 6-1). Re[...]

OM-925 Page 31 SECTION 8 − ELECTRICAL DIAGRAM 230 952-A Figure 8-1. Circuit Diagram[...]

OM-925 Page 32 SECTION 9 − MIG WELDING (GMA W) GUIDELINES 9-1. T ypical MIG Process Connections ! W eld current can damage electronic parts in vehicles. Disconnect both battery cables before welding on a vehicle. Pla ce wor k c la mp a s close to the weld as possible. Wire Feeder/ Power Source W orkpiece Gun Regulator/ Flowmeter Gas Hose Shieldin[...]

OM-925 Page 33 9-2. T ypical MIG Process Control Settings . These settings are guidelines only . Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. T est welds to be sure they comply to specifications. 3.5 x 125 A = 437 ipm 2 x 125 A = 250 ipm 1.6 x 125 A = 200 ipm 30 − 90 A 40 − 145 A 50 − 180 A Conve[...]

OM-925 Page 34 9-3. Holding And Positioning W elding Gun . W elding wire is energized when gun trigger is pressed. Before lowering helmet and pressing trigger , be sure wire is no more than 1/2 in (13 mm) past e nd of nozzl e, an d tip of wir e is p ositi oned corre ctly on sea m. 1 Hold Gun and Control Gun T rigger 2 W orkpiece 3 Work Clamp 4 Elec[...]

OM-925 Page 35 9-4. Conditions That Affect Weld Bead Shape . Weld bead shape depends on gun angle, direction of travel, electrode extension (stickout), travel speed, thickness of base metal, wire feed speed (weld current), and voltage. Slow FILLET WELD ELECT ODE EXTENSIONS (STICKOUT) ELECTRODE EXTENSIONS (STICKOUT) GUN ANGLES AND WELD BEAD PROFILES[...]

OM-925 Page 36 9-5. Gun Movement During Welding . Normally , a single stringer bead is satisfactory for most narrow groove weld joints; however , for wide groove weld joints or bridging acros s gaps, a weave bead or multiple stringer beads works better . 1 Stringer Bead − Steady Movement Along Seam 2 Weave Bead − Side T o Side Movement Along Se[...]

OM-925 Page 37 9-8. T roubleshooting − Excessive Spatter Excessive Spatter − scattering of molten metal particles that cool to solid form near weld bead. S-0636 Possible Causes Corrective Actions Wire feed speed too high. Select lower wire feed speed. V oltage too high. Select lower voltage range. Electrode extension (stickout) too long. Use sh[...]

OM-925 Page 38 9-1 1. T roubleshooting − Lack Of Penetration Lack Of Penetration − shallow fusion between weld metal and base metal. Lack of Penetration Good Penetration S-0638 Possible Causes Corrective Actions Improper joint preparation. Material too thick. Joint preparation and design must provide access to bottom of groove while maintaining[...]

OM-925 Page 39 9-14. T roubleshooting − W aviness Of Bead W aviness Of Bead − weld metal that is not parallel and does not cover joint formed by base metal. S-0641 Possible Causes Corrective Actions W elding wire extends too far out of nozzle. Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle. Unsteady hand. Support hand o[...]

OM-925 Page 40 9-16. Common MIG Shielding Gases This is a general chart for common gases and where they are used. Many different combinations (mixtures) of shielding gases have been developed over the years. The most commonly used shielding gases are listed in the following table. Application Gas Spray Arc Steel Short Circuiting Steel Short Circuit[...]

OM-925 Page 41 Problem Remedy Probable Cause W elding arc not stable. Wire slipping in drive rolls. Adjust pressure setting on wire feed rolls. Replace worn drive rolls if necessary . W rong size gun liner or contact tip. Match liner and contact tip to wire size and type. Incorrect voltage setting for selected wire feed speed o n welding power sour[...]

OM-925 Page 42 SECTION 10 − ACCESSORIES/CONSUMABLES 10-1. Accessories P ART NO. DESCRIPTION REMARKS 770 187 Running Gear/Cylinder Rack For One Small Gas Cylinder , 100 lb (45 kg) max. 194 776 Small Running Gear/Cylinder Rack For One Small Gas Cylinder , 75 lb (34 kg) max. 195 186 Protective Cover W eatherproof Nylon 10-2. Consumables Item Hobart [...]

Warranty Questions? Call 1-800-332-3281 7 AM − 6 PM EST hobart_warr 2008-01 Service Y o u 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 or call 1-800-332-3281. The expertise of the distributor and Hobart i[...]

PRINTED IN USA © 2008 Hobart Welding Products. 2008 − 01 Hoba rt We lding Pr oducts An Illinois T ool W orks Compa ny 600 W est Main St r eet Tr oy , OH 45373 USA For T ech nical Assistan ce: Call1-800-332-3281 Fo r Liter atu re Or Ne ar est Dea le r: Call 1-877-Hobart1 Model Name Serial/Style Number Purchase Date (Date which equipment was deliv[...]