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MMW240TIG

OWNER’S MANUAL

WARNING:

Read carefully and understand all

ASSEMBLY AND OPERATION

INSTRUCTIONS

before operating. Failure to follow the safety rules and other

basic safety precautions may result in serious personal injury.

2/2016

Summary of Contents for MMW240TIG

Page 1: ...MANUAL WARNING Read carefully and understand all ASSEMBLY AND OPERATION INSTRUCTIONS before operating Failure to follow the safety rules and other basic safety precautions may result in serious perso...

Page 2: ...uring defects in the TIG torch and foot pedal control and the parts and labor associated with repairing those defects This warranty does not cover damage such as cuts in cabling crushing or any other...

Page 3: ...s equipment Make sure the area is clean dry and ventilated Do not operate the welder in humid wet or poorly ventilated areas Always have your welder maintained by a qualified technician in accordance...

Page 4: ...d so secure the ground lead before welding Wear dry protective apparel coat shirt gloves and insulated footwear Insulate yourself from the work piece Avoid contacting the work piece or ground Do not a...

Page 5: ...ammable and explosive materials Do not operate any electric arc welder in areas where flammable or explosive materials are present Remove all flammable materials within 35 feet of the welding arc If r...

Page 6: ...move or ship Do not put hands or fingers near moving parts such as drive rolls or fan H F RADIATION can cause interference High frequency H F can interfere with radio navigation safety services compu...

Page 7: ...th Adjustment DC 15 85 Weight 43 lbs Dimension L W H 19 75 in x 9 5 in x 16 125 in DESCRIPTION The MMW240TIG is an inverter powered AC and DC TIG Pulse TIG and Stick welder It requires 230 VAC 196 265...

Page 8: ...lding power source to the tungsten for the purpose of TIG welding It also delivers the shielding gas from the welding power source to the welding zone This style 17 torch uses the same common parts as...

Page 9: ...l Display Indicator light that relates to the setting you wish to set The value will then be displayed in the Digital Functional Control Display POWER INDICATOR LIGHT In the OFF position no power is b...

Page 10: ...then illuminate showing which function you are setting PROCESS SELECTOR Use the Process Selector Button to choose the welding process The indicator lights to the left of the button will illuminate to...

Page 11: ...an then be used to increase or decrease the welding amperage setting as indicated in the Digital Amperage Display During a sequenced weld this amperage setting will remain constant until you activate...

Page 12: ...play for your sequenced weld This Crater Current setting helps to establish an amperage setting that can be used in conjunction with Down Slope to eliminate a crater hole at the end of your sequenced...

Page 13: ...welding are not perfectly fit together or if you are in awkward positions and maintaining the proper arc length is difficult INSTALLATION 1 POWER REQUIREMENT AC single phase 230V 50 60 HZ with a 50 am...

Page 14: ...Positive weld output connection Use this same connection when AC TIG welding 6 BACK PANEL CONNECTIONS 7 GAS INSTALLATION Shielding gas cylinders and high pressure cylinders can explode if damaged so...

Page 15: ...ttle Valve on the cylinder of gas 7 5 Turn the Gas Flow Adjuster on the regulator so that the gas flow rate is set at approximately 20 CFH Make certain you are reading the correct scale on the gauge N...

Page 16: ...advance to the next step in the sequencer 8 2 Remote Contactor And Amperage Control This unit comes standard with a remote foot pedal control The remote foot pedal is used to initiate the arc and the...

Page 17: ...gital Amperage Display Example Set weld current at 150 or adjust current according to the size of electrode To set ARC Force use one of the FUNCTIONAL CONTROL INDEX BUTTONS until the AC BALANCE ARC FO...

Page 18: ...shielding gas prior to the arc start This generally is a short setting Hold the TIG torch steady during pre flow Use one of the FUNCTIONAL CONTROL INDEX BUTTONS until the POST FLOW indicator light is...

Page 19: ...the preferred AC frequency as displayed on the Digital Functional Control Display Example Set AC Frequency to 100 Hz Use one of the FUNCTIONAL CONTROL INDEX BUTTONS until the AC BALANCE indicator lig...

Page 20: ...pedal While welding depress the foot pedal more to increase the Peak Current Or let up on the foot pedal to decrease Peak Current Practice with Peak Current Try a sample run on scrap metal Then try i...

Page 21: ...rent is the amperage the machine will pulse down to providing a reduction of power to pause penetration and to prevent burn through Practice with this setting Try a sample run on scrap metal Then try...

Page 22: ...INDEX BUTTONS until the PEAK CURRENT indicator light is on If Using PULSE Use the FUNCTIONAL CONTROL KNOB to select the preferred peak amperage as displayed on the Digital Amperage Display Example Set...

Page 23: ...rly grounded 230 VAC 50 60 HZ single phase 50 amp power source 1 SETTING UP THE WORK PIECE 1 1 Welding positions There are two basic positions for welding Flat and Horizontal Flat welding is generally...

Page 24: ...setting required for every situation The type and thickness of metal and the position of the work piece determine the electrode type and the amount of heat needed in the welding process Heavier and th...

Page 25: ...amperage range 6 WELDING TECHNIQUES The best way to teach yourself how to weld is with short periods of practice at regular intervals All practice welds should be done on scrap metal that can be disc...

Page 26: ...electrode is consumed and in the direction the weld is to be laid as in following figure 6 3 Types of weld bead The following paragraphs discuss the most commonly used arc welding beads The stringer...

Page 27: ...sion or create a lumpy uneven bead ELECTRIC SHOCK CAN CAUSE INJURY OR DEATH To prevent ELECTRIC SHOCK do not perform any welding while standing kneeling or lying directly on the grounded workpiece 6 6...

Page 28: ...longed exposure to the welding arc can cause blindness and burns Never strike an arc or begin welding until you are adequately protected Wear flame proof welding gloves a heavy long sleeved shirt trou...

Page 29: ...Page of 35 29 Tungsten Electrode Types...

Page 30: ...s generally regarded as a specialized process that requires operator competency While many of the principles outlined in the previous Arc Welding section are applicable a comprehensive outline of the...

Page 31: ...cted To The Work Piece Make Certain The Ground Clamp Is Connected To The Work Piece Wrong Shielding Gas Check to make certain you are using 100 Argon shielding gas Main PC Board has failed Replace the...

Page 32: ...NPUT POWER STRAIN RELIEF 2 6 105500019 INPUT POWER CABLE HOLDER 1 7 105500020 INPUT POWER CABLE HOLDER 1 8 105500021 INPUT POWER SWITCH 1 9 155500002 BACK PANEL 1 10 105500023 GAS CONNECTOR RECEPTACLE...

Page 33: ...1 GROUND CABLE AND CLAMP 1 29 105200136 QUICK CONNECT SOCKET 2 30 105500042 FUNCTIONAL CONTROL KNOB 1 31 155500003 CORNWELL MMW240TIG FACEPLATE 1 32 105500043 FACEPLATE SUPPORT PC BOARD 1 33 105500044...

Page 34: ...CH HEAD 1 3 105500006 SHORT BACK CAP 1 105500005 LONG BACK CAP 1 4 105500011 COLLET 1 16 IN 1 105500057 COLLET 5 64 IN 1 105500058 COLLET 3 32 IN 1 5 105500008 COLLET BODY 1 6 105500013 NOZZLE 5 1 105...

Page 35: ...Page of 35 35 Distributed by CORNWELL QUALITY TOOLS 667 SEVILLE RD WADSWORTH OH 44281 www conwelltools com Made in China...

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