Lincoln Electric 155 - Notice

CYLINDER may explode if damaged. 7.a.Use only compressed gas cylinders containing the correct shielding gas forthe process used and properly operat-ing regulators designed for the gas andpressure used. All hoses, fittings, etc.should be suitable for the applicationand maintained in good condition. 7...

12 GUN INSTALLATION 1. Refer to Figure 1. Unplug the machine or turn power switch to the off “O” position. 2. Pass the insulated terminals of the gun trigger control leads, one at a time, through the Gun Cable and ControlLead Access Slot (2) in the case front. The leads are tobe routed under the Wir...

13 INPUT POWER CONNECTIONS • This welding machine must be connected to power source in accordance with applicable electrical codes. • If there is any question about the installation meeting applicable electrical code requirements, consult aqualified electrician. • Remove electrical power to the mach...

15 CONTROLS AND SETTINGS Refer to the case front t of the WELD-PAK. 1. Power ON/OFF Switch — When the power is on the fan motor will run and air will beexhausted out the louvers in the front of themachine. The welding output and wire feed-er remain off until the gun trigger is pressed. 2. Wire Speed...

18 5. Close the idle roll arm and latch the spring loaded pres-sure arm (2) in place . Rotate the spool counterclock-wise if required in order to take up extra slack in thewire. 6. The idle roll pressure adjustment wing nut is normallyset for mid-position on the pressure arm threads. If feed-ing pro...

19 7. Remove gas nozzle and contact tip from end of gun. 8. Turn the WELD-PAK ON (“I”). 9. Straighten the gun cable assembly. 10. Depress the gun trigger switch and feed welding wire through the gun and cable. (Point gun away from your-self and others while feeding wire.) Release gun triggerafter wi...

20 4. Connect work clamp to metal to be welded. Work clampmust make good electrical contact to the workpiece. Theworkpiece must also be grounded as stated in “ArcWelding Safety Precautions” in the beginning of thismanual. 5. Position gun over joint. End of wire may be lightly touch-ing the work. 6. ...

22 LEARNING TO WELD No one can learn to weld simply by reading about it. Skillcomes only with practice. The following pages will help theinexperienced operator to understand welding and developthis skill. For more detailed information, order a copy of “NewLessons in Arc Welding” listed at the end of...

23 Fumes and slag generated fromInnershield type electrodes recom-mended for use with this weldingmachine can be toxic. • Avoid contact with eyes and skin. • Do not take internally. • Keep out of reach of children. • Follow all safety precautions found in this operating manual. ---------------------...

26 For FCAW (Innershield) Process 1. Do I want simplicity and portability? 2. Will welding be performed outdoors or under windy con- ditions? 3. Do I require good all position welding capability? 4. Will most welding be performed on 16 gauge and heav- ier, somewhat rusty or dirty materials? 5. Weld ...

29 FIGURE 12 Vertical-down Welding Refer to Figure 13 Vertical-down welds are applied at a fastpace. These welds are therefore shallow and narrow and, assuch, are excellent for sheet metal. Vertical-down welds maybe applied to 5/32” (3.9 mm) and lighter material. Use stringer beads and tip the gun i...

30 WELDING TECHNIQUES FOR THESELF-SHIELDED FCAW PROCESS Four simple manipulations are of prime importance whenwelding. With complete mastery of the four, welding will beeasy. They are as follows: 1. The Correct Welding Position Figure 14 illustrates the correct welding position for righthanded peopl...

31 3. The Correct Electrical Stickout (ESO) The electrical stickout (ESO) is the distance from the endof the contact tip to the end of the wire. (See Figure 15.) Once the arc has been established, maintaining the cor-rect ESO becomes extremely important. The ESO shouldbe approximately 3/8 to 1/2 inc...

32 Helpful Hints 1. For general welding, it is not necessary to weave the arc. Weld along at a steady pace. You will find it easier. 2. When welding on thin plate, you will find that you will have to increase the welding speed, whereas when weld-ing on heavy plate, it is necessary to go more slowly ...

33 4. After you strike the arc, practice the correct electrical stickout. Learn to distinguish it by its sound. 5. When you are sure that you can hold the correct electri- cal stickout, with a smooth “crackling” arc start moving.Look at the molten puddle constantly, and look at the“ridge” where the ...

34 When using the GMAW process on light gauge material,weld from right to left (if you are right handed). This results ina colder weld and has less tendency for burn through. 2. The Correct Way To Strike An Arc 1. Be sure the work clamp makes good electrical con-tact to the work. 2. Position gun ove...

36 Practice The best way of getting practice is to perform the followingexercise. Refer to Figure 18. 1. Learn to strike an arc by positioning the gun over the joint and touching the wire to the work. 2. Position face shield to protect face and eyes. 3. Depress gun trigger, hold gun so contact tip t...

37 TROUBLESHOOTING WELDS Good welds have excellent appearance. To Eliminate Porosity (in order of importance):1. Turn on gas supply, if used 2. Decrease voltage. 3. Increase stickout. 4. Increase WFS (wire feed speed). 5. Decrease drag angle. 6. Decrease travel speed. NOTE: Always be sure the joint ...

1. Instale el selenoide de gas. Las instrucciones se incluyen en el juego. 2. Cambie la polaridad de salida a CD (+).Para mayor infor- mación, vea “Instalación del Cable de Trabajo” en la sec-ción de instalación. 3. Cambie la orientación del rodillo impulsor (si es necesario) de acuerdo con el tamañ...

42 GUN AND CABLE MAINTENANCE Gun Cable Cleaning Clean cable liner after using approximately 300 lbs (136 kg)of solid wire or 50 lbs (23 kg) of flux-cored wire. Remove thecable from the wire feeder and lay it out straight on the floor.Remove the contact tip from the gun. Using low pressure air,gently...

43 CHANGING DRIVE ROLL The drive roll has two grooves; one for .023" – .025" (0.6mm) solid steel electrode and a larger knurled groove for.030" (0.8 mm) solid and .035" (0.9 mm) flux-cored steelelectrode. As shipped, the drive roll is installed in the.030"/.035" (0.8/0.9 mm) ...

44 CHANGING LINER NOTICE: The variation in cable lengths prevents the inter-changeability of liners. Once a liner has been cut for a par-ticular gun, it should not be installed in another gun unless itcan meet the liner cutoff length requirement. Refer to Figurebelow. 1. Remove the gas nozzle from t...

45 No wire feed, weld output or gas flow when gun trig-ger is pulled. Fan does NOT operate. 1. Make sure correct voltage is applied to themachine. 2. Make certain that power switch is in the ONposition. 3. Make sure circuit breaker inside wire drive com-partment is reset. No wire feed, weld output o...

46 Low or no gas flow when gun trigger is pulled. Wirefeed, weld output and fan operate normally.(Optional MIG Conversion Kit only.) 1. Verify that gas solenoid is properly installed.Refer to instructions included with MIG conver-sion kit. 2. Check gas supply, flow regulator and gashoses. 3. Check g...

47 E L E C T R I C A L S Y M B O L S P E R E 1 5 3 7 C A V I T Y N U M B E R I N G S E Q U E N C E ( C O M P O N E N T S I D E O F B O A R D ) 5 3 9 5 4 1 2 1 3 G U N T R I G G E R T H E R M O S T A T 2 0 8 5 K W I R E S P E E D R 2 ( W ) ( B ) N . C . 2 0 9 2 1 4 2 1 1 W I N D I N G 2 4 V A U X I L...