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Summary of Contents for Two Fifty Twin

Page 1: ...al No 72 61 2483 MODEL Two Fifty Twin Two Fifty Twin P STOCK NO 901 973 901 976 ADDITIONAL COPY PRICE 60 CENTS MODEL STOCK NO SERIAL STYLE NO DATE PURCHASED OWNERS MANUAL MILLER ELECTRIC MFG CO APPLETON WISCONSIN USA 54911 NWSA CODE NO 4579 U S ...

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Page 3: ...rotection 1 22 Clothing 1 23 Hot Metal Burns 1 24 Grinding and Chipping 1 25 Compressed Gas Cylinder SECTION 2 INTRODUCTION 2 1 2 2 2 3 2 4 SECTION 3 3 1 3 2 3 3 1 1 1 1 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 3 3 4 4 4 4 5 5 5 5 5 5 6 6 7 7 8 8 8 8 8 9 9 9 General Receiving Handling Description Safety INSTALLATION Line Disconnect Switch Location Primary Connections 3 4 Secondary Welding Connections SECTION...

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Page 5: ... of the electrode lead to the holder tight at all times Use only fully insulated electrode holders and without pro truding screwheads Never touch two electrode holders from two separate welding machines at the same time 1 4 CODE CONFORMANCE The machine and its equipment must be installed and main tained in accordance with the National Electrical Code and local requirements 1 5 PARALLEL CONNECTIONS...

Page 6: ...ntainer held a gas or liquid which will not readily dissolve in water 1 Clean out thouroughly with steam or a cleansing agent and purge all air or inert with a gas such as carbon dioxide or nitrogen before repairing Carbon dioxide is heavier than air and will tend to remain in the container if the opening is at the top 2 Use steam to clean out light material 3 Use a strong caustic soda solution to...

Page 7: ...lly hot parts NEVER touch any exposed or non insulated part of the cables cable connectors clamps electrode holders elec trodes or the power supply equipment to prevent harmful or fatal electric shock or burns 1 18 ELECTRICAL SHOCK DAMPNESS NEVER work in a damp area without suitable insulation a gainst shock Keep hands feet and clothing dry at all times To prevent harmful body shocks keep hands fe...

Page 8: ...d accidental contact of the electrodes electrode holder or other electrically energized parts with a compressed gas cylinder or any other pressure vessel Serious accidents or fires may result 2 Use I C C or DOT cylinders They are manufactured and maintained in accordance with DOT require ments and are safe so long as they are properly hayidled Dont drop cylinders 3 Identify gas content by the name...

Page 9: ...er source is capable of operation on either 200 230 or 460 volt 60 Hertz primary electricel power Jumper links are provided with the welding power source for the purpose of matching the machine to one of the above available input voltages AA gol g73 4 Before the equipment is put into operation the safety sec tion at the front of this manual should be read completely This will help avoid possible i...

Page 10: ...ble to the local electrical inspection authority The stud labeled CR0 is connected welding power source chassis and is for grounding purposes only Do not connect a wire from the terminal labeled GAD to either one of the single phase line terminals as this will result in an electrically hot welding power source chassis The standard welding power source is designed to operate on either 200 230 or 46...

Page 11: ... foil tightly around the unin sulated end of the welding cable and the twisted tie wire D 10 Place the jack plug on the end of the welding cable and push it Onto the welding cable over the copper foil E 11 Insert the 1 4 20 set screws into the center and upper holes in the jack plug and tighten A B E __ C F AA 901 024 4 Figure 3 4 Jack Plug Installation 12 Remove the welding cable from the vise an...

Page 12: ...he curve shows the maximum and minimum settings of the Fine Current Control only Curves of other settings will fall between the maximum and minimum curves shown 3 Rotate the Fine Current Control until the desired amperage is indicated on the Current Indicator 4 Connect the work clamp to the item to be welded 5 Place the desired electrode rod into the electrode holder 6 Put on protective clothing a...

Page 13: ...ormation pro vided The assumption of this data is that a proper welding condition has been achieved and has been used until trouble developed In all cases of equipment malfunction the manufacturers recommendations should be strictly adhered to and followed If after performing the following procedures the trouble is still not remedied it is recommended that a serviceman be called It is recommended ...

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Page 15: ... FORM OM 313 MODEL Two Fifty Twin Two Fifty Twin P STOCK NO 901 973 901 976 MODELJSTOCK NO SERIAL STYLE NO DATE PURCHASED PARTS LIST 11 msuuer MILLER ELECTRIC MFG CO APPLETON WISCONSIN USA 54911 NWSA CODE NO 4579 ...

Page 16: ...dicator band BAND indicator TRANSFORMER power See Fig D Page 3 TRANSFORMER power See Fig D Page 3 STABILIZER BAR steel 1 4 x 1 1 2 x 18 BASE PANEL ASSEMBLY front See Page 6 PLUG ASSEMBLY jack black consisting of SCREW self tapping fil hd 8 32 x 1 4 INSULATOR molded black PLUG jack STRIP copper SCREW set 1 4 20 x 3 8 WIRE tie PLUG ASSEMBLY jack red consisting of STRIP copper PLUG jaŁk SCREW set 1 4...

Page 17: ...306 Recommended Spare Parts BE SURE TO PROVIDE STOCK MODEL AND SERIAL NUMBERS WHEN ORDERING REPLACEMENT PARTS 1 2 1 1 1 1 2 1 1 1 2 2 Quantity MOTOR fan consisting of BEARING WINDTUNNEL SPACER mtg rectifier BLADE fan PANEL rear BOARD junction diode leads RECTIFIER main consisting of RESISTOR 1000 ohm 5 watt SUPPRESSOR 1 uf 2 7 ohm DIODE straight polarity DIODE reverse polarity Figure B Panel Assem...

Page 18: ...PARTS Quantity Models Without With PFC PFc Factory Part No Description Quantity Figure C 038 934 Terminal Board Assy Primary See Fig A Page 1 Item 3 BOAI LL mtg components LINK jumper brass STUD hex collar brass 10 32 x 1 3 8 WASHER flat brass 3 16 NUT hex brass 10 32 NUT hex brass 1 4 20 STUD hex collar brass 1 4 20 x 1 3 4 INSULATION Item No Factory Part No Description 0 cc cc Figure D Transform...

Page 19: ... 1 2 2 2 2 4 4 4 1 TD 027 283 Item Dia Factory No Mkgs Part No Description Quantity Figure E 027 283 Reactor Shunt See Fig A Page 1 Item 4 zl REACTOR consisting of COIL ac top COIL ac bottom REACTOR SUBASSEMBLY consisting of WEDGE coil front GUIDE wedge rear SCREW machine md hd 1 4 20 x 7 WEDGE rear movable NUT hex self locking 1 4 20 STRIP fiber 015 x 3 3 16 x 10 INSULATION molded top GUIDE shunt...

Page 20: ...e El 027 215 Shunt See Fig E Page 4 Item 93 SCREW lead COLLAR BLOCK travel shunt NUT hex8 32 BLOCK shunt PLATE lock SCREW machine fiat hd 10 32 x 1 1 2 BEARING thrust 7 16 ID x 3 4 OD x 1 16 WASHER spring 7 16 SCREW set 1 4 20 x 3 16 SCREW machine md hd 8 32 x 1 1 2 SCREW md hd self tapping 8 32 x 3 4 Figure El Shunt TB 027 215 BE SURE TO PROVIDE STOCK MODEL AND SERIAL NUMBERS WHEN ORDERING REPLAC...

Page 21: ... number BEARING nylon PANEL front SWITCH 2PST 60 ampere SWITCH current selector See Fig Fl Page 7 RECEPTACLE ASSEMBLY jack yellow consisting of NUT hex jam 1 2 20 RECEPTACLE brass NUT self locking 1 2 20 WASHER nylafil NUT molded yellow RECEPTACLE ASSEMBLY jack black consisting of NUT hex jam 1 2 20 RECEPTACLE brass NUT self locking 1 2 20 WASHER nylafil NUT molded black RECEPTACLE ASSEMBLY jack r...

Page 22: ...See Fig F Page 6 Item 125 KNOB NUT hex self locking 1 4 20 HANDLE CONTACT copper top rear or bottom front CONTACT copper top front or bottom rear BEARING BOARD glastic mtg components BRACKET mtg switch GUIDE molded HANGER Minerallac No 1 PLATE ASSEMBLY movable consisting of CONTACT ASSEMBLY movable consisting of SPRING pressure CONTACT copper SPRING pressure PLATE glastic Figure Fl Switch Current ...

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