OM-185 480B March 1999 Processes MIG (GMAW) Welding Description Weld Control For Spoolmatic Gun HWC-115A
From Hobart to You Thank you and congratulations on choosing Hobart. Now you can get the job done and get it done right. We know you don’t have time to do it any other way. This Owner’s Manual is designed to help you get the most out of your Hobart products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite. We’ve made installation and operation quick and easy.
SECTION 1 – SAFETY PRECAUTIONS FOR ARC WELDING safety_som1 4/95 OM-185 480 – 2/97 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Y . Marks a special safety message. Means NOTE; not safety related. This group of symbols means Warning! Watch Out! possible ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards. Consult symbols and related instructions below for necessary actions to avoid the hazards. 1-2.
CYLINDERS can explode if damaged. Shielding gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Since gas cylinders are normally part of the welding process, be sure to treat them carefully. 1. Protect compressed gas cylinders from excessive heat, mechanical shocks, slag, open flames, sparks, and arcs. 2. Install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling or tipping. 3.
OVERUSE can cause OVERHEATED EQUIPMENT. SIGNIFICANT DC VOLTAGE exists after removal of input power on inverters. 1. Allow cooling period. 2. Reduce current or reduce duty cycle before starting to weld again. 3. Follow rated duty cycle. 1. Turn Off inverter, disconnect input power, and discharge input capacitors according to instructions in Maintenance Section before touching any parts. STATIC ELECTRICITY can damage parts on circuit boards. 1. Put on grounded wrist strap BEFORE handling boards or parts.
SECTION 2 – INSTALLATION 2-1. Typical Process Connections NOTE Use gun Owner’s Manual when making connections. 40 ft (12 m) Gas Hose 30 ft (9 m) Control Cord 115 Volt Control 30 ft (9 m) Weld Power Cable Constant current and/or constant voltage transformer and engine-driven DC power sources. If the power source does not have a weld output contactor, the optional contactor kit should be ordered.
2-3. Voltage Sensing Lead Connections And Motor Start Control Adjustment 1 2 3 4 Center Baffle Circuit Board PC1 Jumper Plug Receptacle RC3 Internal (INT) and external (EXT) are stamped on PC1 just above RC3. Unit is shipped with jumper plug in internal (INT) position. 5 6 1 CV INT. 2 Front 3 1 For constant current welding (CC), place jumper plug in the EXT position. Connect voltage sensing lead to workpiece. CC EXT.
2-4. Weld Cable Connections 1 2 3 4 5 6 7 1 7 Route weld cable and weld power cable as shown. Be sure lug on weld cable terminal and lug on gun/ feeder weld power cable make contact with each other.
2-5. Input Power Connection 1 1 2 3 2 Contact Closure Interconnecting Cord And Plug PLG5 Voltage Sensing Lead Connect to workpiece for CC operation (see Section 2-3). 3 Grounded Receptacle A 15 ampere branch circuit protected by time-delay fuses or circuit breakers is required. 4 4 Input Power Cord And Plug PLG4 Connect input power plug to a proper receptacle. ST-801 839 2-6. Contact Closure Connections A.
SECTION 3 – OPERATION 3-1. 115 Volt Model Controls 1 Run-In Speed Control Use control to select welding wire speed before arc initiation. After arc initiation, the wire feed speed is controlled by the Wire Speed control on the gun/feeder. 2 1 Power Switch Use switch to turn unit On and Off. 2 wfcontrols_1 1/96 / Ref. ST-144 451-D 3-2. Shielding Gas 1 2 3 2 1 Shielding Gas Cylinder Valve Open valve on cylinder just before welding. Close valve on cylinder when finished welding.
SECTION 4 – MAINTENANCE & TROUBLESHOOTING Y . Disconnect power before maintaining. Maintain more often during severe conditions. 3 Months Clean And Tighten Weld Terminals Replace Damaged Or Unreadable Labels Replace Damaged Gas Hose Repair Or Replace Cracked Cables And Cords 6 Months Blow Out Or Vacuum Inside 4-1. Overload Protection If fuse F1 opens, the weld control shuts down.
4-2. Troubleshooting Trouble Pressing gun trigger does not energize weld control or welding wire. Remedy Secure plug PLG4 in 115 volts ac receptacle (see Sections 2-5). Secure gun plug in Gun Control receptacle RC3 on weld control (see Section 2-2). Check fuse F1 and replace if necessary (see Section 4-1). See Troubleshooting Section of gun and/or welding power source Owner’s Manual. For models without optional contactor control: Pressing gun trigger feeds wire but does not energize welding wire.
SECTION 5 – ELECTRICAL DIAGRAM SC-155 058-B Figure 5-1.
26 18 28 27 24 30 37 38 39 41 1 2 3 4 36 5 40 34 6 35 34 7 9 8 10 33 32 11 12 31 13 14 29 21 22 23 20 15 19 16 17 25 SECTION 6 – PARTS LIST ST-801 837 Figure 6-1.
Item No. Dia. Mkgs. Part No. Description Quantity Figure 6-1. Complete Assembly Of HWC-115A . . . 1 . . . . . . . . . . . . . . . 126 415 . . . CLAMP, saddle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . 2 . . . . . . . . . . . . . . . 126 416 . . . HANDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . 3 . . . . . . . . . . . . . . +137 834 . . . COVER, control box . . . . . .
Notes 123 123
Notes 123 123
Notes 123 123
Effective January 1, 2000 (Equipment with a serial number preface of “LA” or newer) This limited warranty supersedes all previous Hobart warranties and is exclusive with no other guarantees or warranties expressed or implied. Warranty Questions? Call 1-877-HOBART1 for your local Hobart distributor. Service You always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours.
Owner’s Record Please complete and retain with your personal records. Model Name Serial/Style Number Purchase Date (Date which equipment was delivered to original customer.) Distributor Address City State Zip Resources Available Always provide Model Name and Serial/Style Number. To locate a Distributor, retail or service location: Contact your Distributor for: Welding Supplies and Consumables Call 1-877-Hobart1 or visit our website at www.HobartWelders.