Related Manuals for Miller Electric STR 350C
Summary of Contents for Miller Electric STR 350C
- Page 1 OM-249 914B 2011−02 Processes Stick (SMAW) Welding TIG (GTAW) Welding Description Arc Welding Power Source STR 350C/450C www.MillerWelds.com...
- Page 2 Warranty and service information for your 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...
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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. ITW Welding Products Italy S.r.l Via Privata Iseo 6/E, 20098 San Giuliano M.se, (MI) Italy declares that the product(s) identified in this declaration conform to the essential requirements and provi sions of the stated Council Directive(s) and Standard(s). Product/Apparatus Identification: Product Stock Number...
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Page 5: Section 1 − Safety Precautions - Read Before Using
SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som _2010−03 Protect yourself and others from injury — read and follow these precautions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if Indicates special instructions. not avoided, will result in death or serious injury. The possible hazards are shown in the adjoining symbols or explained in the text. - Page 6 D Remove stick electrode from holder or cut off welding wire at FUMES AND GASES can be hazardous. contact tip when not in use. D Wear oil-free protective garments such as leather gloves, heavy Welding produces fumes and gases. Breathing shirt, cuffless trousers, high shoes, and a cap.
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Page 7: Additional Symbols For Installation, Operation, And Maintenance
1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can injure. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables. -
Page 8: California Proposition 65 Warnings
1-4. California Proposition 65 Warnings For Gasoline Engines: Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to Engine exhaust contains chemicals known to the State of cause birth defects and, in some cases, cancer. (California California to cause cancer, birth defects, or other reproduc- Health &... -
Page 9: Section 2 − Definitions
SECTION 2 − DEFINITIONS 2-1. Warning Label Definitions (For Wordless Labels) Warning! Watch Out! There are possible hazards as shown by the symbols. Electric shock from welding electrode or wiring can kill. 1.1 Wear dry insulating gloves. Do not touch electrode with bare hand. -
Page 10: Weee Label (For Products Sold Within The Eu)
Warning! Watch Out! There are possible hazards as shown by the symbols. Electric shock from wiring can kill. Disconnect input plug or power before working on machine. Read the Owner’s Manual before working on this machine. Consult rating label for input power requirements, and check power available at the job site −... -
Page 11: Symbols And Definitions
2-3. Symbols And Definitions Negative Weld Positive Weld Protective Earth Amperes Output Terminal Output Terminal (Ground) Supplementary Output Protector Shielded Metal Arc Volts Input Remote Welding (SMAW) Constant Current Rated Supply Rated Welding Duty Cycle (CC) Current Current Rated No-Load Rated Supply Load voltage Line Connection... -
Page 12: Section 3 − Installation
SECTION 3 − INSTALLATION 3-1. Important Information Regarding CE Products (Sold Within The EU) This equipment shall not be used by the general public as the EMF limits for the general public might be exceeded during welding. This equipment is built in accordance with EN 60974−1 and is intended to be used only in an occupational environment (where the general public access is prohibited or regulated in such a way as to be similar to occupational use) by an expert or an instructed person. -
Page 13: Duty Cycle And Overheating
3-4. Duty Cycle and Overheating Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating. If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle before welding. -
Page 14: Volt-Ampere Curves
The volt-ampere curves show the normal minimum and maximum voltage and amperage output capa- bilities of the unit. STR 350C 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 DC Amperes STR 450C 0 20 40... -
Page 15: Selecting A Location
3-6. Selecting A Location Lifting Eye Lifting Forks Use lifting eye or lifting forks to move unit. Movement If using lifting forks, extend forks beyond opposite side of unit. Line Disconnect Device Locate unit near correct input pow- er supply. Special installation may be required where gasoline or volatile liquids are present −... -
Page 16: Weld Output Terminals And Selecting Cable Sizes
3-8. Weld Output Terminals and Selecting Cable Sizes NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source is 30 m (100 ft) from the workpiece, the total cable length in the weld circuit is 60 m (2 cables x 30 m). Use the 60 m (200 ft) column to determine cable size. -
Page 17: Remote Receptacle Information
3-9. Remote Receptacle Information Socket* Socket Information REMOTE Contact closure to B completes 24 volts AC con- tactor control circuit. Contact closure to A completes 24 volts AC con- tactor control circuit. REMOTE Output to remote control; +10 volts DC. CONTROL Remote control circuit common. -
Page 18: Typical Connections For Stick (Smaw) Welding
3-10. Typical Connections For Stick (SMAW) Welding 956142770_1-5_B / Ref. 803 310 3-11. Typical Connections For TIG (GTAW) Welding Remote output is always On in TIG mode. See Section 4-8 for scratch start TIG information. Hot Start function (for Stick weld- ing) is disabled in TIG mode. -
Page 19: Electrical Service Guide
3-12. Electrical Service Guide Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard. These recommendations are for a dedicated branch circuit that applies to the rated output and duty cycle of the welding power source. 3-Phase Model STR 350 C... -
Page 20: Connecting Input Power
3-13. Connecting Input Power Installation must meet all Na- tional and Local Codes − have only qualified persons make this installation. Disconnect and lockout/tag- out input power before con- necting input conductors from unit. Always connect green or green/yellow conductor to supply grounding terminal GND/PE first, and never to a line ter-... -
Page 21: Section 4 − Operation
SECTION 4 − OPERATION 4-1. Controls Negative (−) Weld Terminal Power On-Off Switch Welding Process Selection Control (Contactor) (See Section 4-2 or 4-3) Welding Current Indicator Power On Pilot Light Weld Output Indicator Light High Temperature Indicator Arc Force (DIG) Control (See Section 4-4) Hot Start Control (See Section 4-4) -
Page 22: Welding Process Selection For Str 450 C
4-2. Welding Process Selection For STR 450 C Welding Process Selection Control (Contactor) Use control to select weld process. The weld process selected determ- ines weld output on/off control. See Table below. Weld output terminals are en- ergized when welding precess selection control is in the TIG Lift-Arc or Stick positions. -
Page 23: Welding Process Selection For Str 350 C
4-3. Welding Process Selection For STR 350 C Welding Process Selection Control (Contactor) Use control to select weld process. The weld process selected determ- ines weld output on/off control. See Table below. Weld output terminals are en- ergized when welding precess selector control is in the TIG Lift-Arc or Stick positions. -
Page 24: Hot Start And Arc Force (Dig) Controls (All Models)
4-4. Hot Start And Arc Force (DIG) Controls (All Models) Weld output terminals are energized when welding pro- cess selector control is in the Stick position. Arc Force (DIG) Control Control increases SMAW short-cir- cuit amperage at low arc voltage. This allows the operator to use a very short arc length without stick- ing the electrode. -
Page 25: Amperage Control (All Models)
4-6. Amperage Control (All Models) Weld output terminals are energized when welding pro- cess selector control is in the TIG Lift-Arc or Stick posi- tions. Amperage Control Rotate control clockwise to in- crease amperage. 4-7. Stick Start Procedure − Scratch Start Technique With Stick selected, start arc as follows: Electrode... -
Page 26: Scratch Start Tig
4-8. Scratch Start TIG This starting method is not accept- able for critical applications since small tungsten particles may be- come embedded in the workpiece and contaminate the weld. Turn gas on. Quickly drag electrode across workpiece like striking a match; lift electrode slightly after touching work. -
Page 27: Section 5 − Maintenance And Troubleshooting
SECTION 5 − MAINTENANCE AND TROUBLESHOOTING 5-1. Routine Maintenance Disconnect power before maintaining. n = Check Z = Change ~ = Clean l = Replace * To be done by Factory Authorized Service Agent Every Months l Damaged Or l Cracked Weld cables ~n Weld Connections Unreadable Labels Every... - Page 28 Trouble Remedy Erratic arc with excessive spatter. Use dry, properly stored electrodes. Shorten arc length. Reduce amperage setting. Electrode freezing to work. Increase amperage setting. Increase arc length. Use dry, properly stored electrodes. Low weld output with no control. Check position of Amperage Control (see Section 4-1). Limited output and low open-circuit Check incoming power for correct voltage.
- Page 29 Notes OM-249 914 Page 25...
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Page 30: Section 6 − Electrical Diagrams
SECTION 6 − ELECTRICAL DIAGRAMS Figure 6-1. Circuit Diagram For STR 350 C OM-249 914 Page 26... - Page 31 956142771-B OM-249 914 Page 27...
- Page 32 Figure 6-2. Circuit Diagram For STR 450 C OM-249 914 Page 28...
- Page 33 956142772-B OM-249 914 Page 29...
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Page 34: Section 7 − Parts List
. . . Nut, Locking M10 STR 350C ....... . . - Page 35 Hardware is common and not available unless listed. 31 27 11-Fig 7-3 956142770_3-5_D Figure 7-2. Main Assembly Quantity Model Item Dia. Part 350C 450C Mkgs. Description Figure 7-2. Main Assembly ....656089037 Clamp, cable .
- Page 36 Quantity Model Item Dia. Part 350C 450C Mkgs. Description Figure 7-2. Main Assembly (continued) ....057028116 Probe Kit, 600A ......... . .
- Page 37 Hardware is common and not available unless listed. 956142770_4-5_D Figure 7-3. Front Panel Quantity Model Item Dia. Part 350C 450C Mkgs. Description Figure 7-3. Front Panel ....000193919 Knob, pointer 1.250 dia .
- Page 38 Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
- Page 39 Effective January 1, 2011 (Equipment with a serial number preface of MB 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 90 Days —...
- Page 40 File a claim for loss or damage during Phone: 39 (0) 2982901 Fax: 39 (0) 298290-203 shipment. email: miller@itw−welding.it For assistance in filing or settling claims, contact your distributor and/or equipment manufacturer’s Transportation Department. ORIGINAL INSTRUCTIONS − PRINTED IN USA 2011 Miller Electric Mfg. Co. 2011−01...