Miller Electric KC237900 manual Percentage Final Amperage, Preflow Time, Spot Time

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4-17. PERCENTAGE DOWNSLOPE RATE CON- TROL (Electroslope Models Only) (Figure 4-1)

PERCENTAGE DOWNSLOPE RATE 0.25-20 SEC.

t

0.25-20s

The PERCENTAGE DOWNSLOPE RATE control is calibrated in percent and can be adjusted for a down- slope rate of approximately .25 (FAST) to 20 (SLOW) seconds. The settings of this control are comparable to the PERCENTAGE UPSLOPE RATE control and deter- mine the time rate at which weld amperage will de- crease to the setting of the PERCENTAGE FINAL AM- PERAGE control.

IMPORTANT: This control may be adjusted while welding.

4-18. PERCENTAGE FINAL AMPERAGE CONTROL (Electroslope Models Only) (Figure 4-1)

PERCENTAGE

FINAL

AMPERAGE

A

The PERCENTAGE FINAL AMPERAGE control ad- justs the welding amperage at the finish of the weld and operates on the same principle as the PERCENTAGE INITIAL AMPERAGE control. The final amperage can- not be higher than the weld amperage provided by TIG- Unit.

IMPORTANT: This control may be adjusted while welding.

4-19. PREFLOW TIME CONTROL & SWITCH (Optional) (Figure 4-1)

PREFLOW TIME

t 1

WARNING: ELECTRIC SHOCK can kill; UN-

EXPECTED HIGH FREQUENCY DURING PREFLOW can cause serious injury and equipment damage.

•Do not allow electroslope switch or other unit control switch to be maintained closed during preflow time.

•Always close and immediately open control switch to ensure that high frequency will not be present during preflow.

If the unit is equipped with the optional electro- slope and preflow timer, it is possible to have high frequency present during preflow without machine contactor energized.

An adjustable 0 to 15 second coolant-gas PREFLOW TIME control can be provided for controlling the period of time shielding gas and coolant flows before the arc is initiated. The PREFLOW TIME control governs the op- eration of a preflow timer within the TIG-Unit.

Rotating the control in a clockwise direction increases the preflow time. The scale surrounding the PREFLOW TIME control is calibrated in seconds to aid in the selec- tion of a preflow time period suited to the individual weld- ing operation.

As soon as the remote contactor control switch has been closed, the preflow timer begins to time out the se- lected period of preflow time. Once the timer has timed out, the gas and coolant valves remain open and the contactor closes providing weld power. The timer auto- matically resets and is ready for another weld cycle whenever the contactor is opened.

When coolant-gas preflow is desired, the PREFLOW TIME switch must be placed in the ON position. Con- versely, by placing the PREFLOW TIME switch in the OFF position and rotating the PREFLOW TIME control to minimum, coolant-gas preflow is not available.

WARNING: ELECTRIC SHOCK can kill.

• Do not touch live electrical parts.

•Set PREFLOW TIME control (if applicable) to 0 (minimum) when not using the preflow device.

The preflow device (if applicable) is always active even though the PREFLOW TIME switch is in the OFF posi- tion.

4-20. SPOT TIME CONTROL AND SWITCH (Optional) (Figure 4-1)

SPOT TIME

t

An adjustable 0 to 5 second SPOT TIME control can be provided for controlling the period of time weld power is available for spot welding. The SPOT TIME control gov- erns the operation of a spot timer within the TIG-Unit.

Rotating the control in a clockwise direction increases the spot time. The scale surrounding the SPOT TIME control is calibrated in seconds to aid the selection of a spot time period suited to the individual welding opera- tion.

When spot welding is desired, the SPOT TIME switch must be placed in the ON position. Conversely, by plac- ing the SPOT TIME switch in the OFF position, spot welding is not available, despite the position of the SPOT TIME control.

The spot weld timer begins to time out as soon as an arc is initiated. When the time set on the SPOT TIME control has elapsed, weld output is cut off and the postflow timer starts.

Upon closure of the remote contactor control switch, the operator may proceed with establishing an arc provided that the preflow timer, if applicable, has timed out. As

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Contents Processes OM-530JDescription From Miller to You Table of Contents List of Charts and Tables Electrical DiagramsParts List Certification for High Frequency ARC Welding EquipmentGeneral Information and Safety Safety Precautions and Signal WordsSpecifications Safety Alert Symbol and Signal WordsSite Selection Installation or RelocationDescription Transporting MethodsComponent Installation Field Installation of TIG-UNITProcedure When Using An External 115 Volts AC Power Supply Procedure When Using 230 Volts AC Internal PowerProcedure When Mounting To 600 Ampere Welding Power Sources Field Installation of Pulser Field Installation of ElectroslopeProcedure for Remote TIG-UNIT IN- Stallation Location Of Relay CR2 And Other ComponentsElectrical Installation Figure Field Installation of Optional PRE- Flow TimerMechanical Installation Figure Electric Shock can killFront Panel Mounting Hole Layout Field Installation of Optional Spot Timer Figure Remote Amperage Output ContactorOn OFF Overload Press to Start GAS GAS OUTCoolant Coolant OUT Coolant Connections Optional FigureWithout Electroslope Amperage Amperage AdjustmentpanelOperator Controls With ElectroslopePostflow GAS/COOLANT on OFFRemote Hand Controls Highon Frequency OFF High FrequencyPULSES/SECOND On TimeBackground ST-009 477-D ST-007 648-G Percentage Initial Amperage ElectroslopePercentage Upslope Rate Percentage Final Amperage Preflow Time Control & Switch Optional FigureSpot Time Control and Switch Optional Figure Preflow TimeHOT METAL, SPATTER, and Slag can cause fire and burns Sequence of OperationFumes and Gases can seriously harm your health GAS Tungsten ARC WeldingShielded Metal ARC Welding with TIG- Unit Maintenance & TroubleshootingShutting Down Weld Cables Maintenance Schedule FrequencyInternal Cleaning Tungsten ElectrodeThorium Alloyed Tungsten Red Band Green BandZirconium Alloyed Tungsten Brown Band Circuit Board Handling Precautions Overload ProtectionTroubleshooting Trouble Probable Cause RemedyElectrical Diagrams OM-530 OM-530 OM-530 General Certification for High Frequency ARC Welding EquipmentDefinitions HIGH-FREQUENCY Radiation General Installation ProceduresLocation Power Service Shielding Of Miscellaneous Wiring In The Weld- ing ZoneMetal Buildings Installation Guidelines Checklist Parts List Main AssemblyQuantity Item Dia Part Model Description Panel, Control Rear w/Components 111 HF Panel -1 ItemPanel, Front w/Components C19 028 CAPACITOR, polye met film 1uf 250VDC Switch, Polarity 300 & 400A Models -4 Item 011041 Pulser Optional -4 ItemElectroslope 9 Optional -4 Item Switch, Polarity 500 & 600A Models -4 Item 048Panel, Control Front w/Components Optional Equipment Page Gold Star SS Accessories TIG-RIG AccessoriesAmpset Cordless Remote Current Control Call Miller for your local Miller distributor Owner’s Record Miller Electric Mfg. Co

KC237900 specifications

The Miller Electric KC237900 is a standout model in the realm of welding technology, specifically designed for versatility and efficiency. This machine embodies Miller's commitment to innovation and quality, making it a popular choice among professionals and hobbyists alike.

One of the main features of the KC237900 is its advanced inverter technology, which allows the unit to operate efficiently across a range of welding applications. This technology ensures that the welder maintains a stable arc for precision welding, even on thin materials. The inverter design also contributes to a lighter and more compact machine, enhancing portability without compromising on power.

The KC237900 supports multiple welding processes, including MIG, Flux-Cored, and Stick welding. This versatility makes it suitable for a variety of projects, from automotive repairs to intricate fabrication tasks. The machine’s ability to handle diverse materials, including steel, stainless steel, and aluminum, further expands its application scope.

Another characteristic of the Miller Electric KC237900 is its user-friendly interface. The digital display provides clear information on amperage and voltage settings, allowing welders to make quick adjustments as needed. Additionally, the intuitive control panel simplifies the operation, making it accessible to users with varying skill levels.

The arc technology integrated into the KC237900 contributes to its smooth and stable welding performance. The unit utilizes Miller's Auto-Set feature, which automatically adjusts parameters based on material thickness and type. This feature not only speeds up the setup process but also enhances the overall weld quality.

Durability is another key aspect of the KC237900. Built with robust materials, the machine is designed to withstand the rigors of job site conditions. Its protective features, such as thermal overload protection, ensure that the unit operates safely and efficiently.

In conclusion, the Miller Electric KC237900 is a high-performance welding machine that combines advanced inverter technology, versatility, and user-friendly features. With its ability to handle multiple welding processes and materials, along with its focus on reliability and ease of use, it stands out as an excellent choice for both experienced welders and newcomers to the trade. Whether for professional use or personal projects, the KC237900 delivers the performance and quality that Miller Electric is known for.
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