Welding processes and features
MasterTig 235, 325, 335 and 425
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This is a function that allows the user to end the current downslope ramp with a quick press of the torch switch.
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Function to adjust the positive and negative current cycles in AC TIG welding. Low percentage means that, on average, the welding current is more on the negative side, and high percentage that, on average, the welding current is more on the positive side.
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Function to change the frequency of the alternating current in AC TIG welding. This setting adjusts the number of cycles per second. Used for changing the frequency of the welding current to best match the welder's preference and application.
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Changes the welding current point where crossing the zero begins. Affects only AC TIG.
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Alternating current TIG welding process, where the polarity of the electrode alternates rapidly between positive and negative. Used especially in aluminum welding.
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Function to change the wave form of the alternating current in AC TIG welding. Three options are available: sine, square and Optima. The wave form affects the shape of weld bead, penetration of the weld and the noise of the welding process. Select the one that suits the application.
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Determines the point where the arc is extinguished in relation to the arc length in MMA welding. The purpose is to optimize the welding termination for each electrode type to prevent the arc from being accidentally extinguished during welding and to avoid burn marks to the weld piece when the welding is stopped.
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Adjusts short circuit dynamics (roughness) of MMA welding by changing, for example, current levels.
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Tells how long the welding arc has been on.
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TIG welding process, where the welding current alternates between two current levels: base current and pulse current. Only welding current needs to be adjusted and pulse parameters are preset automatically. Used for optimizing the arc characteristics for desired welding applications.
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Sets the maximum value for AC balance setting.
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Sets the minimum value for AC balance setting.
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The lower current level of the pulse cycle. In TIG welding, its main tasks are to cool down the weld pool and to maintain the arc.
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Normal TIG welding which doesn’t have any pause times.
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Welding current can be freezed to a certain level during downslope by pressing the trigger.
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Direct current TIG welding process, where the polarity of the electrode is either positive or negative throughout the welding process. Negative polarity (DC-) allows high penetration, whereas positive polarity (DC+) is used only in special applications.
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Double pulse TIG welding can be used for example to increase travel speed or to produce welds with high visual requirements. The welding current is pulsed in two different frequencies: slow and fast. The fast frequency makes the arc more focused, and the slow frequency produces a nice fish-scale appearance to welds.
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Welding function that determines the time, during which the welding current gradually decreases to the end current level. The value for the downslope time is preset by the user. The value zero means the function is off.
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The point of welding current where the downslope ends.
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Ignition mode in TIG welding. In HF ignition, a press on the torch trigger produces a high voltage pulse that creates a spark to ignite the arc. The HF ignition mode must be activated in the control panel.
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Adjusts the voltage of the high frequency spark used in ignition.
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Welding function that uses higher welding current at the start of the weld. After the Hot start period the current drops to normal welding current level. The values for Hot start current level and its duration are preset manually. This facilitates the start of the weld especially with aluminum materials.
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Adjusts the current level of the negative ignition sequence (TIG).
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The way in which the welding arc is ignited. In TIG welding, two ignition modes are available: High Frequency (HF) ignition and Lift TIG ignition. The HF ignition uses a voltage pulse to initiate the arc, and the Lift TIG ignition needs a physical contact between the electrode and the work piece.
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Contact current in the beginning of Lift TIG ignition.
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Ignition mode in TIG welding. In Lift TIG ignition you briefly touch the work piece with the electrode, then press the trigger and lift the electrode to a small distance from the work piece. The Lift TIG ignition must be activated in the control panel. Also known as “Touch ignition” or “Contact ignition”.
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TIG welding process, where the welding current alternates between two current levels: base current and pulse current. Parameters are preset by the user. Used for optimizing the arc characteristics for desired welding applications.
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Place to store predefined welding parameter settings. A welding machine can include a number of preset channels. Users can create new channels for their own welding jobs and modify or delete them. Makes parameter selection easier, and in some cases allows transferring settings from one welding machine to another.
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TIG welding function, which optimizes the spot welding characteristics. Used for tack welding of thin sheets or materials of different thicknesses. Allows fast and easy creation of clean tack welds with minimum heat input.
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TIG welding function, which allows using the torch switch to change between the welding current and Minilog current. Parameters are preset by the user. Welding over tack welds is one application, and it also functions as a "pause current" when the welding position changes for example.
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TIG welding function, where AC TIG and DC TIG processes alternate in predefined manner. Parameters are preset by the user according to welding application. Used especially for optimizing welding of aluminum materials of dissimilar thicknesses.
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Manual arc welding process that uses a consumable electrode. The electrode is covered with flux material that protects the weld area from oxidation and contamination.
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A function which automatically decreases the welding current significantly when electrode is touching the workpiece. Can be used for avoiding MMA electrode getting too hot when it’s in contact with the workpiece.
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The sequence of TIG ignition which is on the negative side of the current. It is typically the last part of the ignition with ACDC power sources. With DC power sources, it’s the only part of the ignition with TIG.
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Adjusts the current level of the negative ignition sequence (TIG).
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Adjusts the length of the negative ignition sequence (TIG).
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Determines a point to which current goes down as fast as possible and then starts normal downslope.
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The sequence of TIG ignition which is on the positive side of the current. It is typically the first part of the ignition with ACDC power sources. DC power sources don’t have positive ignition with TIG.
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Adjusts the current level of the positive ignition sequence. Only in ACDC power sources (TIG).
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Adjusts the length of the positive ignition sequence. Only in ACDC power sources (TIG).
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Welding function that continues the shielding gas flow after the arc has extinguished. This ensures that the hot weld does not come into contact with air after the arc is extinguished, protecting the weld and also the electrode. Used for all metals. Especially stainless steel and titanium require longer post gas times.
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Welding function that starts the shielding gas flow before the arc ignites. This ensures that the metal does not come into contact with air at the start of the weld. Time value is preset by the user. Used for all metals, but especially for stainless steel, aluminum and titanium.
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The higher current level of the pulse cycle. In TIG welding, its main task is to create weld pool or increase the heat of the weld pool.
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Determines how many pulse cycles is created per second (Hz).
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Determines how big part of the whole pulse cycle time is spent on pulse current.
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TIG welding process, where the welding current changes between two current levels: base current and pulse current. Parameters can be set either manually or automatically. Used for optimizing the arc characteristics for desired welding applications.
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Welding function that allows using a brief low current period at the start of the weld. This enables precise start of welding. The parameters are preset by the user.
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This is a function that automatically creates a slight upslope to prevent electrode wearing caused by sudden current rises with high welding currents. This function has an effect only when the welding current is 100 A or more.
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Welding function that uses lower welding current at the start of the weld. After the Soft start period the current rises to normal welding current level. The values for Soft start current level and its duration are preset manually. Soft start is used to soften the start period of welding especially with steels.
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TIG welding function, which automatically produces a weld of predefined duration. Parameters are preset by the user. This function is used for attaching two pieces of materials with tack welds, for example joining thin sheets with low heat input.
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The point of welding current where the upslope begins.
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Welding function that allows using a brief low current period at the end of the weld. This reduces welding defects caused by end cratering. The parameters are preset by the user. The value zero means the function is off.
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Manual welding process that typically uses a non-consumable tungsten electrode, a separate filler material, and an inert shielding gas to protect the weld area from oxidation and contamination during the welding process. The use of a filler material is not always mandatory in TIG welding.
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A function which automatically decreases the welding current significantly when electrode is touching the workpiece. Can be used for example to avoid unwanted dilution from electrode to welded metal.
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Welding torches have two alternative operation modes: 2T and 4T. They differ in the way how the trigger operates. In 2T mode you hold the trigger down while welding, whereas in 4T mode you press and release the trigger to start or to stop welding and to use special trigger functions, such as Minilog.
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Trigger operation mode of a welding torch. When you press the trigger down in 2T mode, the shielding gas starts to flow and the arc ignites. Hold down the trigger while welding and release it when you want to stop welding.
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Trigger operation mode of a welding torch. When you press the trigger down in 4T mode, shielding gas starts to flow but the arc won’t ignite until you release the trigger. To stop welding you press the trigger down again and then release it to extinguish the arc.
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Welding function that determines the time, during which the welding current gradually increases to desired welding current level at the start of the weld. The value for the upslope time is preset by the user. The value zero means the function is off.
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A safety device used in welding equipment to reduce the open-circuit voltage to maintain below a certain voltage value. This reduces the risk of electric shock particularly in dangerous environments, such as closed or damp spaces. VRD may also be required by law in certain countries or regions.
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A wizard-like utility for easy selection of welding parameters. The utility walks the user step-by-step through the selection of required parameters, presenting the selections in an easily understandable way for a non-technical user. Available in MTP35X control panel in MasterTig product family.
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