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Lincoln Electric Power MIG 350MP, Operator'S Manual

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Lincoln Electric Power MIG 350MP Operator'S Manual Download Page 30

D-2 

D-2

MAINTENANCE

4. Insert the untrimmed Liner into the back end of the

gun.

5. Seat Liner bushing into back of gun. Secure Liner

by tightening set screw. Do not install the gas dif-
fuser at this time.

6. Lay the cable straight and trim Liner to 9/16”.

Remove burrs.

7. Install insulator and secure the gas diffuser into the

tube.

Excessive pressure at the start may cause the dirt
to form a plug.

-----------------------------------------------------------

Flex the cable over its entire length and again blow
out the cable. Repeat this procedure until no further
dirt comes out. If this has been done and feed prob-
lems are experienced, try liner replacement, and refer
to trouble shooting section on rough wire feeding.

LINER REMOVAL AND REPLACEMENT

(SEE FIGURE D.1)

LINER REMOVAL, INSTALLATION AND TRIMMING
INSTRUCTIONS FOR MAGNUM 350MP

NOTE: The variation in cable lengths prevents the
interchangeability of liners between guns. Once a liner
has been cut for a particular gun, it should not be
installed in another gun unless it can meet the liner
cutoff length requirement. Liners are shipped with the
jacket of the liner extended the proper amount.

1. Remove the gas nozzle.

2. Remove the gas diffuser from the gun tube. 

3. Lay gun and cable out straight on a flat surface.

Loosen set screw of the connector on the back end
of the gun.

CAUTION

.56" (14.2mm)

LINER TRIM

LENGTH

Gun Tube 
Assembly

Insulator

Gas Diffuser

Gas Nozzle

Contact Tip

INSULATION TUBE

FEEDER END
CABLE HANDLE

BRASS CABLE
CONNECTOR

SET SCREW

MOLDED GAS PLUG

LINER ASSEMBLY(LINER BUSHING TO BE SEATED
TIGHT AGIANST BRASS CABLE CONNECTOR)

FIGURE D.1

POWER MIG

®

350MP

Summary of Contents for Power MIG 350MP

Page 1: ...ode ex 10859 Serial ex U1060512345 IM10105 Issue D ate 12 Sep Lincoln Global Inc All Rights Reserved For use with machines having Code Numbers 11827 Register your machine www lincolnelectric com register Authorized Service and Distributor Locator www lincolnelectric com locator ...

Page 2: ...AKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING Read and understand the following safety highlights For additional safety information it is strongly recommended that you purchase a copy of Safety in Welding Cutting ANSI Standard Z49 1 from the American Welding Society P O Box 351040 Miami Florida 33135 or CSA Standard W117 2 1974 A Free copy of Arc Welding Safety booklet E205 is ava...

Page 3: ...h Never simultaneously touch electrically hot parts of electrode holders connected to two welders because voltage between the two can be the total of the open circuit voltage of both welders 3 i When working above floor level use a safety belt to protect yourself from a fall should you get a shock 3 j Also see Items 6 c and 8 ii SAFETY ii FUMES AND GASES can be dangerous 5 a Welding may produce fu...

Page 4: ...reas Avoid welding near hydraulic lines Have a fire extinguisher readily available 6 b Where compressed gases are to be used at the job site special precautions should be used to prevent hazardous situations Refer to Safety in Welding and Cutting ANSI Standard Z49 1 and the operating information for the equipment being used 6 c When not welding make certain no part of the electrode circuit is touc...

Page 5: ...riés et non inflammables 4 Des gouttes de laitier en fusion sont émises de lʼarc de soudage Se protéger avec des vêtements de protection libres de lʼhuile tels que les gants en cuir chemise épaisse pan talons sans revers et chaussures montantes 5 Toujours porter des lunettes de sécurité dans la zone de soudage Utiliser des lunettes avec écrans lateraux dans les zones où lʼon pique le laitier 6 Elo...

Page 6: ...y important when identifying the correct replacement parts CUSTOMER ASSISTANCE POLICY The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment consumables and cutting equip ment Our challenge is to meet the needs of our customers and to exceed their expectations On occasion purchasers may ask Lincoln Electric for advice or information about their use...

Page 7: ..._______________________________________________________ Accessories Section C Drive Roll Kits C 1 Aluminum Feeding Kit Readi Reel Adapter C 1 Dual Cylinder Mounting Kit C 1 Magnum GMAW Gun and Cable Assemblies C 1 Magnum Gun Connection Kit C 1 Spool Gun PrinceTM XL C 1 Making a Weld with the Prince XL or Cobra Gold Torch Installed C 2 _______________________________________________________________...

Page 8: ...CATIONS POWER MIG 350MP INPUT SINGLE PHASE ONLY RATED OUTPUT OUTPUT RECOMMENDED INPUT WIRE AND FUSE SIZES SINGLE PHASE Height Width Depth Weight 31 79 in 18 88 in 38 78 in 255 Ibs 808 mm 480 mm 985 mm 116 kg PHYSICAL DIMENSIONS Wire Speed 50 700 IPM 1 27 17 8 m minute WIRE SPEED RANGE Standard Voltage Frequency Input Current 230Amp Rated Output Input Current 300 Amp Rated Output 208 230 460 575 50...

Page 9: ...e and local code requirements This welder may be operated from a single phase line or from one phase of a two or three phase line 2 The POWER MIG 350MP is supplied connected for 230 Volt Input If the welder is to be operated on another voltage it must be reconnected according to the instructions in Figure A 1 Read entire installation section before starting installation SAFETY PRECAUTIONS POWER MI...

Page 10: ... of this chapter for proper wire sizes For long runs over 100ft 30 48m larger copper wires should be used Fuse the two hot lines with super lag type fuses as shown in the following dia gram The center contact in the receptacle is for the grounding connection A green wire in the input cable connects this contact to the frame of the welder This ensures proper grounding of the welder frame when the w...

Page 11: ... and tighten knurled screw 3 Connect the gun trigger connector from the gun and cable to the mating receptacle inside the com partment located above the gun connection made in step 2 above Make sure that the key ways are aligned insert and tighten retaining ring SHIELDING GAS For Gas Metal Arc Welding Processes Customer must provide cylinder of appropriate type shielding gas for the process being ...

Page 12: ...alve slow ly a fraction of a turn When the cylinder pressure gauge pointer stops moving open the valve fully Never stand directly in front of or behind the flow regulator when opening the cylinder valve Always stand to one side 8 The flow regulator is adjustable Adjust it to the flow rate recommended for the procedure and process being used before making the weld INSTALLING TIG TORCH The POWER MIG...

Page 13: ...ONAL TO REMOTE CONTROL RECEPTACLE GAS HOSE WORK PIECE WORK CLAMP WORK CABLE CONNECTOR TO GAS SUPPLY TO NAGATIVE STUD POWER CABLE TIG TORCH TO POSITIVE STUD REMOTE CONTROL RECEPTACLE SPOOL GUN AND TIG TORCH GAS CONNECTION GAS LINE FROM CYLINDER AND REGULATOR GAS REGULATOR GAS CYLINDER FIGURE A 4 FIGURE A 5 ...

Page 14: ...d ground Always wear dry insulating gloves FUMES AND GASES can be dangerous Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zone WELDING SPARKS can cause fire or explosion Keep flammable material away Do not weld on closed contain ers ARC RAYS can burn eyes and skin Wear eye ear and body protec tion Observe all safety information throughout this manual DEFINIT...

Page 15: ...cally change many variables so that as the WFS is changed the arc length and arc appearance will remain the same The synergic modes are usable with both push and push pull torches as described later in this Manual When using a spool gun however although the synergic pulsed modes are still accessible they must be used in a non synergic manner as described in the Accessory Section The digital microc...

Page 16: ... value depending on the status of the machine Located below the display is the text Volts and Trim An LED light is illuminated to the left of one of these in order to indicate the units of the value displayed in the meter CV Processes Prior to GMAW and FCAW operation the meter displays the desired preset Voltage value Prior to synergic GMAW P and GMAW PP oper ation the meter displays the desired p...

Page 17: ...ns that the machine is set for CC GTAW TIG welding Toggle the SELECT switch to activate the weld parame ters for the selected weld mode Set each parameter using the SET switch to adjust the parameter displayed on the display meter NOTE If the LED next to the weld parameter is flashing the WFS AMP and or the Volt Trim values can also be adjusted for that parameter using the control knobs below each...

Page 18: ...fers the ability to set a wire feed speed from trigger until an arc is established that is independent of the Welding or Start wire feed speed Setting a Run In WFS lower than the welding WFS avoids stubbing problems when starting the arc Run In is selected by toggling the SELECT switch until the LED next to RUN IN is lit A Run In speed may be adjusted using the SET switch on the Multi Process Pane...

Page 19: ...higher energy result a more fluid transfer arc Setting 1 to 10 puddle and larger for a crisper lower droplet size The postive energy arc settings reduce the droplet size and reduce energy to the arc GMAW P Pulsed Pulsed frequency Minus settings reduces Wider arc cone and spray metal transfer control frequency Plus weld bead Narrower settings increase arc cone and narrower frequency weld bead Pulse...

Page 20: ...e ability to set an endpoint for WFS and Voltage that will be reached over a specified time period At the end of the weld when the trigger is released the crater timer will begin and the WFS and Volts settings will ramp down from the Weld Mode WFS and Voltage settings to the Crater WFS and Voltage set tings over the time selected This creates a ramp down of the WFS and Volts during the Crater time...

Page 21: ...re comes off the reel in a direction so as to de reel from the top of the coil CAUTION PROCEDURE FOR CHANGING DRIVE AND IDLE ROLL SETS 1 Turn off the power source 2 Release the pressure on the idle roll by swinging the adjustable pressure arm down toward the back of the machine Lift the cast idle roll assembly and allow it to sit in an upright position 3 Remove the outside wire guide retaining pla...

Page 22: ... the gun IDLE ROLL PRESSURE SETTING ELECTRIC SHOCK can kill Turn the input power OFF at the weld ing power source before installation or changing drive rolls and or guides Do not touch electrically live parts When inching with the gun trigger electrode and drive mechanism are hot to work and ground and could remain energized several sec onds after the gun trigger is released Only qualified personn...

Page 23: ...gun bushing and tighten the thumb screw AVOIDING WIRE FEEDING PROBLEMS Wire feeding problems can be avoided by observing the following gun handling procedures 1 Do not kink or pull cable around sharp corners 2 Keep the gun cable as straight as possible when welding or loading electrode through cable 3 Do not allow dolly wheels or trucks to run over cables 4 Keep cable clean by following maintenanc...

Page 24: ...PLET OF WELD MATERIAL Pulsed MIG is an advanced form of welding that takes the best of all the other forms of transfer while minimiz ing or eliminating their disadvantages Unlike short cir cuit pulsed MIG does not create spatter or run the risk of cold lapping The welding positions in pulsed MIG are not limited as they are with globular or spray and its wire use is definitely more efficient Unlike...

Page 25: ... the Arc Control increases the droplet trans fer and weld deposition rate Since Arc Control varies weld droplet transfer rate the Arc Control can be used to vary the ripple spacing in the weld bead BENEFITS OF PULSE ON PULSE FROM LINCOLN ELECTRIC Excellent appearance of the weld bead Improved cleaning action Reduced porosity Table B 3 shows WFS and Trim settings for common aluminum types and wire ...

Page 26: ...re Select a shielding gas appropriate for a short arc process For steel use 75 25 Ar CO2 shield gas For Stainless select a Helium blend Tri Mix For Aluminum use 100 Ar Start by setting the wire feed speed based upon mate rial thickness and appropriate travel speed Then adjust the Volts Trim knob as follows For steel listen for the traditional frying egg sound of a good short arc MIG procedure to k...

Page 27: ...e POWER MIG 350MP provides gun trigger switch transfer between the Magnum gun or the spool gun for the same polarity weld ing with different wire and gas processes Closing either gun trigger will cause the electrode of both guns to be electrically HOT Be sure unused gun is positioned so electrode or tip will not contact metal case or other metal common to work Because the control circuitry senses ...

Page 28: ...e the WFS at the spool gun To decrease the arc length decrease the SPD value at the POWER MIG 350MP to a value lower than the actual WFS Remember The dialed in SPD value at the POWER MIG 350MP does not control the WFS at the spool gun Rather it is adjusting the POWER MIG 350MP synergic work point Therefore adjusting the SPD value will not change your actual WFS at the spool gun WFS can only be cha...

Page 29: ...10 minutes of arc time or as required GUN CABLE CLEANING To help prevent feeding problems clean cable liner after using approximately 350MP pounds 136 kg of electrode Remove the cable from the wire feeder and lay it out straight on the floor Remove the contact tip from the gun Using an air hose and only partial pres sure gently blow out the cable liner from the gas dif fuser end SAFETY PRECAUTIONS...

Page 30: ...EMENT SEE FIGURE D 1 LINER REMOVAL INSTALLATION AND TRIMMING INSTRUCTIONS FOR MAGNUM 350MP NOTE The variation in cable lengths prevents the interchangeability of liners between guns Once a liner has been cut for a particular gun it should not be installed in another gun unless it can meet the liner cutoff length requirement Liners are shipped with the jacket of the liner extended the proper amount...

Page 31: ...IBLE CAUSE lists the obvious external possibilities that may contribute to the machine symptom Step 3 RECOMMENDED COURSE OF ACTION This column provides a course of action for the Possible Cause generally it states to contact your local Lincoln Authorized Field Service Facility If you do not understand or are unable to perform the Recommended Course of Action safely contact your local Lincoln Autho...

Page 32: ...e properly sized See installation section of the manual for recommended fuse and breaker sizes 2 Welding procedure is drawing too much output current or duty cycle is too high Reduce output current duty cycle or both 3 There is internal damage to the power source Contact an autho rized Lincoln Electric Service facility 1 Make certain that the power switch is in the ON position 2 Input voltage sele...

Page 33: ...e rating and reconnect panel configuration 2 Make sure settings for wire feed speed and voltage are correct for process being used 3 Make sure output polarity is cor rect for process being used 4 Check welding cables and gun assembly for loose or faulty con nections 1 Make sure settings for wire feed speed and voltage are correct for process being used 2 The Run In Fast or Slow speed may be wrong ...

Page 34: ... gun cable may be dirty 3 Check drive roll tension and position of grooves 4 Check for worn or loose drive rolls 5 The electrode may be rusty or dirty 6 Check for damaged or incorrect contact tip 7 Check wire spindle for ease of rotation and adjust break ten sion knob if necessary 1 Check the wire feed drive rolls and motor for smooth operation 2 Check for restrictions in the wire feed path Check ...

Page 35: ...led the problem is within the POWER MIG 350MP 5 Make sure the gun is pushed all the way into gun mount and is properly seated RECOMMENDED COURSE OF ACTION If all recommended possible areas of misadjustment have been checked and the problem persists Contact your local Lincoln Authorized Field Service Facility GAS FLOW PROBLEMS If for any reason you do not understand the test procedures or are unabl...

Page 36: ...or overload average motor Verify motor armature is not current exceeded 8 00 amps for binding Verify Wire Spool more than 0 50 seconds is not binding 82 Motor overcurrent average motor Verify wire can move freely in current exceeded 3 50 amps for cable Verify Spool Brake is not more than 10 0 seconds set to tight Displays Description Scrolling dash Appears at power up while the machine is going th...

Page 37: ...ake Refer to the push pull connection kit for this spacer 3 Check the wire at the spool Make sure wire is not crossed and is de reeling properly 4 Increase wire feed speed to 350 400 ipm 5 If problem continues after 1 thru 4 are checked then the Stall Factor Number needs to be increased See Stall Factor Number Adjustment 1 Check torch cable for kinks Torch cable should be laid out relatively strai...

Page 38: ...lp the wire jump the gap 3 Slow down wire feed speed while pushing wire through torch liner Recommend setting 350 ipm 4 If problem continues after 1 thru 3 are checked then the Stall Factor Number needs to be decreased See Stall Factor Number Adjustment 1 POWER MIG 350MP drive rolls set too tight The tension arm should be set at 1 to 1 1 2 2 Check to see that the spindle brake is not set too tight...

Page 39: ...t at 1 to 1 1 2 3 Push Pull torch drive rolls set too tight Refer to owners manual for proper setting 4 If pulse welding the trim value may be set too high 5 Clean or replace contact tip 6 If problem continues after 1 thru 5 are checked then the Stall Factor Number needs to be increased See Stall Factor Number Adjustment 1 Torch liner conduit not inserted all the way so that it is touching the inn...

Page 40: ...ER MIG 350MP off 2 Hold the Push Pull Torch trigger in and turn the power back on Continue to hold the trigger in while machine powers up 3 Once the machine displays SF in the left display and a number 5 to 35 in the right display the trigger can be released 4 Use the volts trim knob to adjust the Stall Factor Number 5 Once the Stall Factor Number is adjusted push the select switch up 6 The displa...

Page 41: ...nly It may not be accurate for all machines covered by this manual The specific diagram for a particular code is pasted inside the machine on one of the enclosure panels If the diagram is illegible write to the Service Department for a replacement Give the equipment code number ...

Page 42: ...DIMENSION PRINT F 2 POWER MIG 350MP F 2 3 00F M19231 ...

Page 43: ...NOTES POWER MIG 350MP ...

Page 44: ...NOTES POWER MIG 350MP ...

Page 45: ...electrically live parts or electrode with skin or wet clothing Insulate yourself from work and ground No toque las partes o los electrodos bajo carga con la piel o ropa moja da Aislese del trabajo y de la tierra Ne laissez ni la peau ni des vête ments mouillés entrer en contact avec des pièces sous tension Isolez vous du travail et de la terre Berühren Sie keine stromführenden Teile oder Elektrode...

Page 46: ...gute Be und Entlüftung des Arbeitsplatzes Mantenha seu rosto da fumaça Use ventilação e exhaustão para remover fumo da zona respiratória Turn power off before servicing Desconectar el cable de ali mentación de poder de la máquina antes de iniciar cualquier servicio Débranchez le courant avant l entre tien Strom vor Wartungsarbeiten abschalten Netzstrom völlig öff nen Maschine anhalten Não opere co...

Page 47: ...s and Service through Subsidiaries and Distributors Worldwide Cleveland Ohio 44117 1199 U S A TEL 216 481 8100 FAX 216 486 1751 WEB SITE www lincolnelectric com World s Leader in Welding and Cutting Products ...

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