Miller Electric Maxstar 200 STR Troubleshooting − Burn-Through, Troubleshooting − Distortion

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10-19. Troubleshooting − Burn-Through

Burn-Through − weld metal melting completely through base metal resulting in holes where no metal remains.

Possible Causes

Corrective Actions

 

 

Excessive heat input.

Select lower amperage. Use smaller electrode.

 

 

 

Increase and/or maintain steady travel speed.

 

 

10-20. Troubleshooting − Waviness Of Bead

Waviness Of Bead − weld metal that is not parallel and does not cover joint formed by base metal.

Possible Causes

Corrective Actions

 

 

Unsteady hand.

Use two hands. Practice technique.

 

 

10-21. Troubleshooting − Distortion

 

 

 

Distortion − contraction of weld met-

 

 

 

al during welding that forces base

 

 

 

metal to move.

 

 

Base metal moves

 

 

 

 

in the direction of

 

 

 

 

the weld bead.

 

 

 

Possible Causes

 

Corrective Actions

 

 

 

Excessive heat input.

 

Use restraint (clamp) to hold base metal in position.

 

 

 

 

 

 

 

Make tack welds along joint before starting welding operation.

 

 

 

 

 

 

 

Select lower amperage for electrode.

 

 

 

 

 

 

 

Increase travel speed.

 

 

 

 

 

 

 

Weld in small segments and allow cooling between welds.

 

 

 

 

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Contents OM-2233 203 409Q ProcessesDescription From Miller to You Table of Contents − Parts List Directives StandardsDecstat6/05 Page Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique un message de sécurité particulier Incendie ou une explosion LE Soudage peut provoquer unDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques Principales normes de sécurité− Definitions CE Models Electric shock from welding electrode or wiring can killWeee Label For Products Sold Within The EU 60 sFalling equipment can cause injury and damage to unit Manufacturer’s Rating Label Symbols And DefinitionsSpecifications − InstallationVolt-Ampere Curves 5 V a C In p u tTh e r In p u t V o lt a g e s Minutes Welding Duty Cycle And OverheatingOverheating MinutesSelecting a Location Dimensions And WeightSection Location And AirflowRemote 14 Receptacle Information Weld Output Terminals And Selecting Cable SizesTurn off power before mak- ing connections Stick Dcep Direct Current Electrode Positive Connections Electrical Service GuideInput Voltage Input Amperes At Rated OutputConnecting Three-Phase Input Power Connecting Input PowerFor Three-Phase Operation = GND/PE Earth GroundConnecting Single-Phase Input Power − Operation ControlsNon CE Units For CE Units Process Control Lift-ArcStart ProcedureLift-Arc Start ApplicationAmperage Control Stick Start Procedure − Scratch Start TechniqueDIG Control MinRoutine Maintenance − Maintenance and TroubleshootingBlowing Out Inside Of Unit MonthsTroubleshooting Help Aids Output LED High Temperature LEDHelp 8 Display Trouble Remedy TroubleshootingShield weld zone from drafts Check and tighten all gas fittings see SectionCircuit Diagram − Electrical DiagramsUp to Amperage Range Gas Type PolarityPositioning The Torch − Guidelines for Gtaw TIG WeldingPositioning Torch Tungsten For Various Weld Joints Torch Movement During WeldingTungsten Without Filler Rod Tungsten With Filler RodStick Welding Procedure Weld current starts when electrode touches work- piece− Stick Welding Smaw Guidelines Electrode and Amperage Selection Chart Striking an Arc − Scratch Start TechniqueStriking an Arc − Tapping Technique Good Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder 10-30 9090 End View of Work AngleElectrode Movement During Welding Conditions That Affect Weld Bead ShapeLap Joint Butt JointsTee Joint 16 in 30 1.6 mm Tack WeldsTroubleshooting − Excessive Spatter Troubleshooting − PorosityWeld Test Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Excessive Penetration Troubleshooting − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion − Parts List 2734 401 400402 614615 600 PC2 602 400 601 603 605 Panel, Front w/Components -1ItemPanel, Rear w/Components Magnetics Assembly w/Components 1Item Windtunnel w/Components -1Item Windtunnel w/Components604 600 601 602 604Base Assembly Service Your distributor also givesSupport Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s

Maxstar 200 STR specifications

The Miller Electric Maxstar 200 STR is a versatile and compact welding power source designed for a range of applications, making it an ideal choice for both professional welders and hobbyists. Known for its reliability and exceptional performance, the Maxstar 200 STR is capable of delivering high-quality results in various welding processes, including Stick (SMAW) and TIG (GTAW) welding.

One of the standout features of the Maxstar 200 STR is its inverter technology, which allows for efficient energy use and a lightweight, portable design. Weighing in at just 51 pounds, it is easy to transport, making it perfect for fieldwork or remote projects. The unit operates on both 120V and 240V input power, providing versatility for different environments and applications. This adaptability ensures that welders can work effectively in various settings, whether in a shop or on a construction site.

Another significant characteristic of the Maxstar 200 STR is its precise arc control. The machine offers adjustable AC frequency, allowing users to fine-tune the arc characteristics for different materials and thicknesses. This level of control is particularly beneficial when working with aluminum, as it helps reduce heat input and minimize warping. The Maxstar also features a pulsing function, which can enhance the weld pool control and improve penetration, making it easier to achieve clean and consistent welds.

The Maxstar 200 STR boasts a robust duty cycle of 60% at 200A, ensuring that it can handle demanding jobs without overheating. Additionally, the unit is equipped with an advanced cooling system, which helps maintain optimal performance during extended use. Safety features, including overload protection and an enclosed design that reduces the risk of contamination, further enhance the machine's reliability.

Moreover, the Maxstar 200 STR supports a range of accessories, including a remote foot control, which allows for added flexibility during TIG welding operations. This feature is particularly useful for precise control over the welding current, enabling welders to make adjustments on the fly without having to stop and manually change settings.

In summary, the Miller Electric Maxstar 200 STR stands out in the welding industry for its combination of portability, advanced technology, and high performance. With its inverter design, precise arc control, and robust duty cycle, it is an ideal solution for professionals seeking efficiency and quality in their welding projects, whether they are working on industrial applications or artistic endeavors.
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