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The amount of current (amps) is controlled by the user. It's done with a variable resistor. Another thing to note is whether you are welding constant current or constant voltage. If you are welding constant current, the voltage will vary and a set Amp measure will remain constant. With constant voltage, the current will vary and that's determined by the resistance. Constant voltage should be an easier set up. I'm not 100% sure but most stick welding is constant current, which is why increasing the arc length produces more heat, because more arc length should increase the resistance, which would cause the welding machine to increase voltage to keep the current constant.
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What is the term tw refers to in welding?
TW = thermite welding, a welding process that requires no external source of heat or current.
Where you get welding objective type question and answer?
welding current for 2mm thick. ms plate
What is current adjusting wheel of an welding machine?
Regulating the medium of welding according to the needs
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.
What is a general formula for welding output current and voltage relationship for MMA welding machines?
V= 0.05 i + 10 for mmaw welding v= 0.05 i + 20 for tig welding
What is the purpose for welding with direct current?
spot welding is one reason
What is the term tw refers to in welding?
TW = thermite welding, a welding process that requires no external source of heat or current.
What is current adjusting wheel of an welding machine?
Regulating the medium of welding according to the needs
Where you get welding objective type question and answer?
welding current for 2mm thick. ms plate
How does a welding transformer work?
A welding transformer uses the alternating current supplied to the welding shop at a high voltage to produce the low voltage welding power
Is there any function in sql server to return all values of a column seprated by comma you dont want to use loop or sql sever cursor?
CREATE TABLE #T ( ID INT, [NAME] VARCHAR(50) ) INSERT #T SELECT 1, 'Row1' UNION SELECT 2, 'Row2' UNION SELECT 3, 'Row3' UNION SELECT 4, 'Row4' UNION SELECT 5, 'Row5' UNION SELECT 6, 'Row6' UNION SELECT 7, 'Row7' UNION SELECT 8, 'Row8' UNION SELECT 9, 'Row9' UNION SELECT 10, 'Row10' SELECT * FROM #T DECLARE @Values AS VARCHAR(8000) SELECT @Values = '' SELECT @Values = @Values + ISNULL([Name] + ', ', '') FROM #T IF LEN(@Values) > 0 SELECT @Values = LEFT(@VALUES, LEN(RTRIM(@VALUES)) - 1) --Remove trailing comma SELECT @Values AS CommaDelimitedResultSet DROP TABLE #T
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.
What is a general formula for welding output current and voltage relationship for MMA welding machines?
V= 0.05 i + 10 for mmaw welding v= 0.05 i + 20 for tig welding
What is polarity in welding?
Polarity in welding has to do with the direction of the current in the welding process. With direct current (DC) the welding circuit can either be straight, or reverse polarity. When the machine is set for straight polarity, the current flows from the electrode to the weld surface and creates considerable heat in the metal. When the machine is in reverse polarity, the current is backwards and is flowing from the metal to the electrode causing a grater concentration of heat at the electrode.
What component of a welding machine changes AC current to DC current?
Yes, it is normal for a welding machine to convert AC voltage to a DC voltage.
What does the E stand for on a welding rod?
It stands for electrode. As opposed to R ( rod) for gas welding or TIG welding. If it carries electrical current it is an electrode.
What is typical open circuit voltage for an arc welding machine?
voltage available to the welding current via the machine
