Read and understand the entire contents of this manual, with spacial emphasis on the safety material throughout the manual, before installing, operating, or maintaining this equip. men. This unit and these instructions are for use only by persons trained and experienced in the safe operation of welding equipment. Do not allow untrained persons to install, operate, or maintain this unit.
LIMITED WARRANTY EFFECTIVE: FEBRUARY 25, 1986 This warranty supersedes all previous MILLER transitives and is exclusive with no either guarantees of warranties expressed or implied. LIMITED WARRANTY Subject fo the trams and conditions hereof, Miller Electric Mfg. Co., Appleton, Wisconsin warrants t0 it Distributorship that sll new and unused Equipment furnished by Miller is free from defect in workmanship and material as of the time and place of delivery by Miller.
ERRATA SHEET June 13, 1986 FORM: OM-350N After this manual was printed, refinements in equipment design occurred. This sheet lists exceptions to data appearing later in this manual. Dia. Part Replaced " Miss. No. With Description Quantity 1-17 004 803 +108 323 HF PANEL 1 48 601837 +601 838 NUT, brass-hex jam . 4 4-12 13 036 865 -+074 398 TRANSFORMER, volts 1 4-15 c14 031 602 +098 761 CAPACITOR, mica 0,002 uf vomits 1 4-16 010 884 + Elated 8-26 PC1 083 149 110 459 CIRCUIT CARD, control (Eff w/JG064819). .. .
CERTIFICATE NAME OF EQUIPMENT: MODEL NO.. SERIAL NO. DATE This equipment has been type-tested under standardized field test conditions as recommended by the Joint Industry Committee on High Frequency Stabilized Arc Welding Mo chines found to rad. fate less thin 10 microlights per meter ot o distance of one mils, the maximum allowable limit established by the Federal Communications Commission for equipment of this type.
Mmes— A LE OF CONTENTS s Section No, Page No. SECTION 1 SAFETY RULES FOR OPERATION OF ARC WELDING POWER SOURCE 1-1. General Precautions Arc Welding. Standards Bookie 8 SECTION 2 INTRODUCTION 2 -1, Interdenominational Safety ...l Receiving-Handling Description 8 SECTION 3 INSTALLATION 3-1. Location Weld Output Connections Remote Current Control Connection Remote Contractor Control Switch Assembly Remote Contractor Control Connection Water Connections. ..
Section No. Page No. SECTION 6 MAINTENANCE g~ 1. Fan Motor 18 ‘6.2, Internal Cleaning Spark Gaps 18 ‘w4, 115 Volts Control Circuit Overload Protection 18 ~ 8. Hall Amplifier 18 SECTION 7 TROUBLESHOOTING 7 -1, General bean 19 SECTION 8 CERTIFICATION FOR HIGH FREQUENCY ARC WELDING EQUIPMENT 8-1. General Information .27 8 -3, Wielding Machine Welding Wiring In The Vicinity Of The Welding Area 28 8 -7, Grounds... Metal Building Individual Installation Certification L2 8-10. Check List .
=SECTION 1 SAFETY RULES FOR OPERATION OF ARC WELDING POWER Source -1. INTRODUCTION We learn by experience. Learning safety through personal experience, like a child touching a hot stove is harmful, wasteful, and unwise. Let the experience of others teach you. Sate practices developed from experience in the use of welding and cutting are described in this manual. Research, development, and field experience have evolved reliable equipment and safe installation, operation, and servicing practices.
highly toxic gas, and other lung and eye irritating products. The ultraviolet {radiant} energy of the arc cen also decompose trichiorosthylene and perchioroethylene vapors to form phalanges. DO NOT WELD or cut where solvent vapors can be drawn into the welding or cutting atmosphere or where the radiant energy can penetrate to atmospheres containing even minute amounts of hydroelectricity or chlorofluorocarbon, ‘C.
(CC or DOT marking must be on each cylinder. 1t is an assurance of safety when the cylinder is properly handed. identifying gas content. Use only cylinders with name of gas marked an than; do not rely on color ta identity gas comet, Notify supplier if unmarked. NEVER DEFACE or alter mans, number, or other markings on a cylinder. it is regal and hazardous, Empties: Keep valves closed, replace caps securely; mark MT; keep them separate from FULLS and return promptly. Prohibited use.
Liquid" or equivalent per gallon of water). Bubbles indicate leak. Clean off soapy water after test; dried soap is combustible. E. User Responsibilities Remove leaky or defective equipment from service immediately for repair, See User Responsibility statement in equipment manual, F. Leaving Equipment Unattended Close gas supply at source and drain gas. G. Rope Staging-Support Rape staging-support should not be used for welding or cutting operation; rope may bum. 1-3.
E. Shock Prevention Exposed hut conductors or other bare metal in the welding circuit, or in grounded, electrically-HOT equipment can fatally shock a person whose body becomes a conductor. DO NOT STAND, SIT, LIE, LEAN ON, OR TOUCH a wet surface when waling, without suitable protection, To protect against shock: Keep body and clothing dry. Never work in damp ares without adequate insulation against electrical shock. Stay on a dry duckboards, or rubber mat when dampness or sweat can not be avoided.
of rad-tag switches) to prevent accidental turning ON of power. Disconnect all cables from welding power sours, and pull ail 115 vomits tine-cord plugs. Do not open power circuit or sangs polarity while welding. If, in an emergency, it must be disconnected, guard against shock burns, or flash from switch arcing, Leaving equipment unattended. Always shut OFF and disconnect all power to equipment. Power disconnect switch must be available near the welding power source, F.
sm— 5 SECTION 2 INTRODUCTION Amperes input At Rand | Welding | Max Rated Load Outgun” Welding | Cu rent | Open[ 69wy Single-Phase Wright Cu rent Ranges Circuit Model Amperes | Amperes | Voltage | 200v | z30v [ assoc [675v| kva | kw | Ner | snip 300 300 Without PFC* @ Low 675 138 | 120 278 a2 Vomits | 237th 20 12.8 | 720 loa. | 735 Ibs. 300 80% |High 15-376 1327 kg.) {1333 kg.) with PFC* | Duty Coyle o 96 48 (985 2 Withe s 236 | 208 | 102 [m15| a7 40 Vot | 25625 80 26 | 287 s, | 302 s, 500 60% 1402 kg.
the unit and carefully inspect for any damage that may have occurred during shipment. Any claims for loss or damage that may have occurred in transit must be filed by the purchaser with the carrier. A pacy of the bile of lading will be furnished by the manufacturer on request if occasion to file claim arises.
2, Connect electrode and work cables to the ELECTRODE and WORK weld output terminals. Ensure that connections are clean and tight. 3 3. REMOTE CURRENT CONTROL CONNECTION {Figure 4-1} The CURRENT control receptacle provides a connection point between an optional remote control and the welding power source current control circuitry. To connect the remote control, insert plug into the receptacle and rotate collar clockwise.
Tahoe 3-2, input Conductor And Fuse Size input Conductor Size AWG* Fuse Size In Amperes 200V | 230V [ 460V | 675V Model | pecs* [200v | 230v | 460V | 575V Without 300 | Filipino. 41 lino. &Inonu. 8) |(No. g1f 280 | 226 | 110 | 90 I Ampere | With 1/0 1 6 PEC _ |{No. 6) |{No. 8} {No. 8} |(No. 8] 280 | 225 | 100 | SO 280 Without | ya mpg | 3/0 500 3 4 PEC INo. 2) {No. 41| (No. 8} [{No. 8) 360 | 300 | 175 | 126 mere | With 3/0 2/0 PFC |{No. 4) |{No. 4} {No. 8} | (No.
Current Contractor Switch Switch Bart Current Switch Creator Fil Switch High Frequency Switch Start Current Contort AC Balance Post-Flow Tami Control Work Output Terminal Electrode 2 Output =i Terminal © *Optional Accessories *optional Pulsar Models Only Access Openings Current Control Voltmeter AC snd DC* Am mater AC and BC* Pr-Flow Switch fer-Flow Control* Pilot Lamp Po war Switch / L~ Spot Tami Control Spot Time Switch* [ Pulsar Newton» % On Time Control* Puffs Par Second Control** | Background Currant C
A. $tart Current Switch A two-position toggle switch is provided to determine whether or not the start circuit is functional. Placing the START CURRENT switch in the ON position will make the START CURRENT central operative. The OFF position makes the START CURRENT control inoperative thereby causing the weld current ta go immediately to the setting of the CURRENT CONTROL at arc initiation, B.
When the control is in the BALANCED position, the wave shape provides penetration and cleaning action, The AC BALANCE control should be in the BALANCED position when employing the dc Gas Tungsten-Arc Welding process. The scale surrounding the' AC BALANCE control is calibrated in increments from 1 to 10, The scale is not an amperage or voltage reading.
With the use of the volt-amperes curves it is possible to determine the load voltage at any particular weld current, 4-13. METERS (Optional) This welding power source can be equipped with meters. The meters are for monitoring the welding operation and serve as indication of the welding process.
When coolant-gas per-flow is desired, the PER-FLOW TIME switch must be placed in the ON position. Conversely, by placing the PER-FLOW TIME switch in the OFF position, coolant-gas per-flow is not available, despite the position of the PER-FLOW TIME control.
b. Towards MAX. PENETRATION for less cleaning action and more penetration, or towards MAX. CLEANING for more cleaning action and less penetration when ac welding. 8. Rotate the POST-FLOW TIME control to the desired coolest-gas post-flow time. If the welding power source is equipped with a PREF LOW TIME control {optional} set the PREF LOW TIME controls as instructed in Section 4-18. i coolant-gas per-flow is not desired, place the PER-FLOW TIME switch in the OFF position. 9.
10. 11, 12, 186. 17. 18. Place the CRATER FILL switch in the desired position. If the CRATER FILL switch is placed in the IN position, the CURRENT switch should be placed in the PANEL position and the CONTRACTOR switch should be placed in the REMOTE position. Place the START CURRENT switch in the desired position; If this switch is placed in the ON position, rotate the START CURRENT control to the desired position, Rotate the AC BALANCE control to the desired position: a, BALANCED for dc welding. b.
11, Place the RANGE switch in the desired position if applicable. 12. Rotate the CURRENT CONTROL to the desired position, 13, If the welding power source is a PULSE equipped model, and the arc pulsing function is desired, settee PULSE controls as instructed in Section 5-3. i arc pulsing is not desired, place the PULSE switch in the OFF position, 14. Place the SPOT TIME switch in the ON position and rotate the SPOT TIME control to the desired position, 15. Place the POWER switch in the ON position. 18.
8 6. HALL AMPLIFIER The hall amplifier HA1 provides 2 signal which represents the magnitude of the weld current, for use in the regulation portion of the control system. For tha 300 ampere models, a single turn of heavy cable carries the high range current through the torpid core, and four additional turns of light cable cant the fow. range currant. The output signal 10 be volt dc (negative} per 100 amps of welding current on the high range and one volt de {negative) per 20 amps on the low range.
TROUBLE PROBABLE CAUSE REMEDY Ne weld output; fan inoperative, Gen line fuse. Check for and replace open line fuse. improper electrical input connections, Refer to Section 3-8 for proper input connections, input voltage jumper rinks not in peeper configuration. Refer to Section 3-BB for proper Input voltage jumper rink configuration, No weld output; fan | Improper electrical input | Refer to Actions 3-2 and 3-8 for proper electrical operative. and/or weld output con[ input and weld cutout connections.
a0 5 POWER-U «Te3: 1R 10Ky POST FLOW C Top =L o] HF TIME Lu Toy ls i ohs taps Circuit Diagram No. A-052 835-A Figure 7.3, Circuit Diagram For Post-Flow And High Frequency Timer SEE NOTE ¢ + +15v, NOTE 1; SEE MACHINE DIAGRAM FOR PROPER AMMETER CONNECTION, HDy Big. OUT I 22 4. 6ro, Cs2 As0 =15V, Betimes Circuit Diagram No.
SECTION 8 CERTIFICATION FOR HIGH FREQUENCY ARC WELDING EQUIPMENT 81. GENERAL This following information is necessary to make a proper installation of the high frequency arc welding equipment described in this instruction manual. In order to comply with Part 18 of the Rules and Regulations of the Federal Communications Commission, the certificate in front of this manual must be filled in completely and signed.
Solis} metallic shielding shall enclose the primary power service to the equipment from a point 50 feet from the equipment in an unbroken run, This shielding shall be grounds at the farthest point from the equipment and should make good electrical contact with the casing of the equipment.
Grounded at 50 foot intervals, " ™~ Shielded Wires ™\ / e e, Balding Machine Electrode \ Holder v .. Work Neap ALL unconsidered and underground wires out of this High Field Intensity Zone./ T [ / Figure 8-5. General Requirements to Minimize Re radiation Pick-Up In the Vicinity of the Weld Zone Extreme precaution should be taken 10 make sure that the location of the zone is chosen 5o that none of the conditions gre voided by shielded wires off the premises but stilt within the radial dimensions of the H.F.l.
the wire used for this connection of sufficient size? Is the work terminal connected to a good electrical ground? is the cable or copper braid used for this connection equal to or greater in current carrying capacity than.the welding lead? is this cable as short as possible? Are the spark-gaps set at .
Quantity _ Mods! Item Dia, Part 300 | 500 No, Mk gs. No. Description Amp | Amp Figure A Main Assembly 1 039 244 COVER, top 082 302 COVER, tap-w/p 039 248 2 2 3 C1s 009 083 CAPACITOR ASSEMBLY Ci8 008 062 CAPACITOR ASSEMBLY 026 627 GASKET, lifting eye 1 1 & HAT HDY 004 580 SENSOR, current 1 6 HA1 HDY 059 841 SENSOR, current 1 7 Figure B PANEL, TEl 034 687 TERMINAL ASSEMBLY, primary {Fig TEY 058 241 TERMINAL ASSEMBLY, primary (Fig 031 638 CAPACITOR, ceramic 0.
Quantity Model fem Dia. Part 300 | 500 No. Mk gs. Na. Description Arp | Amp Figure B Panel, {Fig A Pg 1 totem 801 MOTOR, fan 1/12 hp 230 volts 1550 rpm 1 1 FM 032605 MOTOR, $P1/4hp . . 1 2 016 268 CHAMBER, plenum 14 inch % 2 020 728 CHAMBER, plenum 18 inch 1 3 032 604 BLADE, fan 60 Hz inch 3 wing 1 3 032 606 BLADE, fan 80 Hz 18 inch 3 wing 22 deg 1 4 039 247 PANEL, rear 4 4 069 068 PANEL, rear.
item Dia. No. Mk gs. Figure D Carapace Coils at Factory or Factory Authorized Service Station Part No. Description reflector & Transformer, Power-Main {Fig A Pg 1 tam 10} Quantity BOO DT ONION B DD B WREN s BE SURE TO PROVIDE MODEL AND SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS. OM-356 Page 3 039 313 REACTOR, square wave {consisting of} .. 068 113 REACTOR, square wave {consisting of} 000 192 . COIL, reactor-square wave RH . 059 101 . COIL, reactor-square wave R4 . 003 031 . CON, reactor-square wave LH .
#em Dia. Part No, Mk gs. No.
Quantity Mode fem Dia. Part 300 | 600 No. Mk gs. No. Description Amp | Amp . nel, Section bents {Fig A Pg 1 Figure ¥ not-{ ) W/ Com pol s {Fig g 1 003 045 PANEL, front-louvered 1 1 2 008 835 SWITCH, w/leads 039 273 PLUG, 6 pin MS3106A-16S-8P . 1 1 039 885 CLAMP, cable 1 1 4 +106 584 PANEL, front 1 4 +108 552 PANEL, front. 1 5 038 047 TERMINAL, power output {consisting 601 878 . NUT, 1 1 7 038 044 . 1 1 8 601 880 . NUT, hex-jam 1 1 3 038 049 . TERMINAL BOARD, red 601 976 .
Quantity Model item Dia. Part 300 | 500 No. Mk gs. No. Description Amp | Amp Figure G Pansy, Section) W/Components (Fig A Pg 1 tem 18) 1 003 053 GUARD, slot-switch selector 3 2 2 887 004 266 SWITCH, range/polarity/selector {Fig G1 Pg8) 1 2 857 069 081 SWITCH, polarity/selector {Fig PANEL, front {item 072 462 POTENTIATE, carbon 1 turn 2 watt 1000 ohm (consisting 072590 .
fem Dia. No. Mk gs, Figure G1 Part No. Description Switch, Range/Polatity/Selector (Fig G Pg & Item 2} _Quantity __Model 300 | 500 Amp | Amp 059 081 WRN RIS ~a s BE SURE TO PROVIDE MODEL AND SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS.
__Quantity N _lode! stem Pan 300 | 500 No. Na, Description Amp | Amp 8 2 Figure G1A Contact Board, Switch-Selector AC/DC {Fig G1 Pg 10 Item 604 318 NUT, self-locking hex 1 1 2 039 257 HANDLE, switch 1 1 3 024 694 BEARING 011948 GUIDE, contact 0118560 CONTACT, switch 103 634 MOUNTING BOARD, component 1 1 7 011951 CONTACT, switch 103 633 BUS BAR, shorting .. 1 9 038 768 CONTACT BOARD, switch consisting 103 632 | PLATE, toggieswiteh 1 1 13 011645 . CONTACT ASSEMBLY, 2 2 12 011 075 ..SPRING, pressure, 011963 .
stem Part Ne. No. Description Quantity Figure G18B Contact Beard, Selector AC/DC {Fig G1 Pg 10 Item 4} (38 769 011 645 011 074 011 863 011 078 103 632 011948 011 8581 011 960 103 634 {24 684 038 257 604 318 020 484 103 633 CONDO SURE TO PROVIDE MODEL AND SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS, OM-350 Page 11 CONTACT BOARD, switch (consisting oft . CONTACT ASSEMBLY, movable consisting of) . . SPRING, pressure .. CONTACT, switch . .. SPRING, pressure . . . PLATE, toggle switch GUIDE, contact .
fern Part No. Na. Description Quantity Figure GIC 000 876 Contact Board. Switch-Polarity (Fig 61 Pg 10 lam 6) M ooy 1 103 634 MOUNTING BOARD, component 1 2 011948 GUIDE, contact 2 3 103 633 BUS BAR, shorting . 2 4 038 769 CONTACT BOARD, swi 1 5 103 832 . PLATE, wiggle switch 1 6 011 845 , CONTACT ASSEMBLY, movable (consisting of} 2 7 011075 ..SPRING, pressure .. 1 8 011953 ..CONTACT, switch . 2 8 011074 .. SPRING, pressure .. 1 10 804 318 NUT, serif-locking hex .
_Quantity . _ Model fem Part 300 | 500 No. No. Description Amp | Amp o B Figure G10 Contact Board, Switch-Range (Fig G1 Pg 10 item 103 634 MOUNTING BOARD, 1 1 2 011 848 GUIDE, contact . 2 2 021 193 GUIDE, contact . 2 3 0119581 CONTACT, switch 2 3 103 633 BUS BAR, shorting 038 763 CONTACT BOARD, switch-polarity 1 2 6 103 632 . PLATE, toggle switch 1 1 6 011845 . CONTACT ASSEMBLY, movable (commons of}. 2 2 7 011075 ., SPRING, pressure . 011963 ..CONTACT, switch 2 2 9 011074 | .
Quantity Model lem Dia. Part Spot | Pr-flow No. Mk gs. Na., Ascription Timer Timer R N Figure G2 Spot Timer and Pr-flow Timer (Fig G Pg 8 Items 5200 (011 808 SWITCH, toggle SPIT 15 amp 125 volts .. 1 1 8200 011 811 SWITCH, toggle DPT 15 amp 126 volts 1 2 000 821 STRIP, mounting-circuital 1 1 3 106 625 SPACER, 1/40Dx8/641Dx 008 787 CIRCUIT CARD, spot timer {consisting 1 048 325 . CIRCUIT CARD, spot timer {(consisting of) 1 4 008 799 CIRCUIT CARD, per-flow timer {consisting of} .
item Dia. Part No. Mk gs. No. Description Quantity Figure G3 Purser Control (Fig G Pg 8 inert 13) 1 003 813 STRIP, MIG oooiiiv i 1 2 R422 035 837 POTENTIATE, carbon 1 turn 2 watt 1000 ohm . 1 3 R420 004 186 POTENTIATE, carbon 1 turn 2 watt 5000 ohm . 1 4 106 625 SPACER, 1/4 0D x3/84 1D x inch . 4 5 072 810 CIRCUIT CARD, pulse (consisting of) 1 AR-402 035845 .iC 3 C400 003 830 . CAPACITOR, ceramic 1 uf 50 volts 1 €401,402 031 630 . CAPACITOR, electrolytic 20 uf 50 volts de 2 €403,404 000 340 .
Dia. Part Description Quantity Circuit Card, Post-Flow & HF Timer (Fig G Pg 8 item 28} Mk gs. No. Figure G4 052 790 ABO 008 971 Cs0 031 810 C51,53 039 482 b2 031 677 Ch4 039 481 (65 035 835 CRB0,51 039 486 CRIB 059 931 026 202 D54 037 203 Q50 000 088 Q51 037 201 REQ 030 712 R&1 601 304 R52 074121 R&3 039 335 RE4 000 342 RB5 035 823 REB 035 888 RE7 038 108 R58 (35 896 R60 030 997 RB1 035 827 RE2 035 884 RE3 035 886 R&4 030 720 039 348 iC, linear CAPACITOR, electrolytic 40 uf 250 vats de .
fem Dia. Part No. Mk gs. No. Description Quantity Figure G5B 000 176 Rectifier, SCR Main (300 Amp) {Fig G Pg B item 32) 1 044 604 SUPPRESSOR 4 2 010 311 CLAMP, 3/4 dia, x 1/2 wide SCRUB-4 000251 THEORIST, 250 amp 300 volts 4 4 025 248 INSULATOR, stand-off 037 857 DIODE, 275 amp 300 volts = = THOTH 8198 Figure GB Rectifier, SCR Main {300 Amp Models} BE SURE TO PROVIDE MODEL AND SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS.
item Dia. Part No. Mk gs, No. Description Quantity Figure G6 088 072 Ratifier, SCR Main {600 Amp} (Fig G Pg 8 Item 32} 1 083 884 CLAMP, theorist 4 2 010311 CLAMP, 4 3 (B8 079 SUPPRESSOR/SNUBBER {Prior to JA426383}.
Oia. Part Mk gs. No. Description Quantity Figure G7 083 148 Circuit Card, Control Main {Fig G Pg 8 item 25} C1,2 000 858 CAPACITOR, electrolytic 220 uf 35 voltage C5,8,8,12 058 122 CAPACITOR, ceramic 0.01 uf 500 volts .. C7,23,28 072 835 CAPACITOR, electrolytic 33 uf 35 vats d¢ ©11,27,28 007 742 CAPACITOR, electrolytic 10 uf 35 volts .. C13 091 378 CAPACITOR, tantalum 33 uf 26 volts de . €15,22,25 081 319 CAPACITOR, metal firm 0.47 uf 50 volts dc . €16,19,20 034 286 CAPACITOR, poly film 0.
Dia. Part Miss. No. Description Quantity Figure G7 083 148 Circuit Card, Control Main {Fig G Pg 8 Item 25) {Cont’d.) €30-32 069 228 CAPACITOR, ceramic 0.02 uf 500 volts 3 D-7, 9-11, 13-24, . 27,28 028 351 DIODE; signal 0.02 amp 75 volts straight polarity . 24 D12 004 145 DIODE, zen er 18 volts Watt 1 D28,30 028 202 DIODE, rectifier 1 amp 400 volts straight polarity 2 035845 IC, linearity 10 ol 039 351 1 14,15,17,18 037 200 TRANSISTOR, 200 MA 40 volts NON. . .
{OPTIONAL) SYNCROWAVE® PROGRAMMERS SP1 SP2 SP3 SP4 For Semi-automatic or Fully Automatic Weld Programming — with E!ectroslope® . . . for exact control of weld current buildup or decay. with Pulse. . . for improved penetration and better control of the weld puddle, with Sequencer. . . for automated welding and programmed procedures, Provides timer ac curacies within + .01 second (1 cycle) repeatability. STANDARD FEATURES Line Vantage Compensated Convenient Up-Front Controls Low Cost . . .
OPTIONAL EQUIPMENT (POWER SOURCE) SPOT WELD TIMER Stock No, 041 178 {Factory} Stock No. 041 171 (Field Kit) Provides an adjustable spot weld time from 0 t0 5 seconds. On/Off switch included. PULSE Stock No, 063 268 (Factory} Stock No. D03 266 (Fissile Kit) Permits welding of extra thin ministerial, easier and batter welding of piping with inserts. Provides heating and cooling affect of the weld puddle PREF LOW TIMER Stock No.
