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reverse polarity and straight polarity
The answer is right but a bit of furthur explanation is required. Polarity can be changed in DC output welding sets. The heat of the welding arc is concentrated on the positive terminal. So when thick plates are welded as more concentration of heat is required on the job the job is kept +ve ie. straight polarity is used.
For thin plates concentration of heat is on the filler rod ,so reverse polarity is used.
What else can I help you with?
What do you call the type of current which no fixed polarities?
The type of current with no fixed polarities is called alternating current (AC). In AC, the direction of the flow of electric charge periodically reverses, resulting in changing polarities. This is in contrast to direct current (DC), where the flow of charge remains constant in one direction. AC is commonly used in residential and commercial power supply systems.
Can a DC motor be turned into a welder?
A dc is an acronym for direct current & 2 be put in to use,changed to ac which could then be used in welding
What type of diodes are used in welding machines?
Welding machines commonly use silicon rectifier diodes, specifically high-power diodes designed to handle the high current and voltage associated with welding operations. These diodes are essential for converting alternating current (AC) to direct current (DC), providing a stable and controllable welding arc. Additionally, fast recovery diodes may also be utilized in inverter-based welding machines for improved efficiency and performance.
What determines weather the polarity of a welding machine is set for dcen or dcep?
DCEP supplies about two-thirds of the heat at the end of the rod, which allows more digging action, or penetration, into the base metal. It's what you want to use for thick steel. For thin steel, direct current electrode negative (DCEN) is best.
Is a dc welder electrode positive?
In a DC welder, the polarity can be either direct current electrode positive (DCEP) or direct current electrode negative (DCEN), depending on the desired welding characteristics. DCEP, where the electrode is positive, is commonly used for processes like TIG welding, as it provides better penetration and a hotter arc. Conversely, DCEN is often used for processes like MIG welding, providing a different heat distribution and weld bead profile. The choice of polarity affects the welding process and the type of materials being welded.
How is current controlled in welding transformer?
in welding machine, the transformer used is basically a current transforrmer. so by changing the tap of secondary side of transformer, we can increase or decrease the current in the transformer.
How do you do welding process by the use of a rectifier?
In the welding process using a rectifier, alternating current (AC) is converted to direct current (DC) to provide a stable arc and better control over the welding process. The rectifier allows for smoother welding, reducing spatter and improving penetration. Typically, a DC welding machine is used, which can be set for either electrode positive (DCEP) or electrode negative (DCEN) polarity, depending on the type of weld desired. Properly adjusting the voltage and current settings on the rectifier ensures optimal performance for different materials and thicknesses.
How welding current is generated?
Welding current is typically generated through a power source that converts electrical energy into a suitable form for welding. This can be done through mechanisms like transformers, rectifiers, or inverters, depending on the type of welding process being used. The current is then delivered to the welding arc, where it generates the heat necessary to melt and join the workpieces.
Is your house alternating or direct current?
Alternating current. Direct current is used in batteries.
The old welding machines used electromagnetic winding to step up the current for welding rods. What is the new principle inside the welding machines?
The new principal inside welding machines is based on metal-arc welding, whereas the older welding machines used electromagnetic winding to increase the current in welding rods.
In alternators the welding current is produced on the?
In alternators, the welding current is produced on the stator winding due to the electromagnetic induction process. When the rotor, which is a magnet, rotates within the stator, it creates a varying magnetic field that induces an alternating current (AC) in the stator windings. This induced current can then be used for welding applications by converting it to the appropriate form and intensity required for the welding process.
What letters are used to direct current?
DC are the letters for direct current AC are the letters for alternating current
