tanky322
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I came across a circuit online to vary the 220V input into a welder. This is done to control the amount of current entering the piece being welded, using a foot pedal. The circuit has worked for many people.
I built the circuit, but it doesn't work. R2 blew when I would crank the pot up, and there was no current entering the welder. I don't know if the SCR fired or not, but it wouldn't weld or make a spark what so ever.
My initial thoughts are that the circuit was designed for a particular type of SCR, and mine isn't compatible.
Also, I am an EE student but I am just starting out, I have some circuit theory under my belt, but I am not sure on what to use as a voltage in this circuit, as its all part of the 220V line.
Can anyone help me out?
Sorry for the size of the pictures, but I wanted to keep the detail.
Thank you!
I built the circuit, but it doesn't work. R2 blew when I would crank the pot up, and there was no current entering the welder. I don't know if the SCR fired or not, but it wouldn't weld or make a spark what so ever.
My initial thoughts are that the circuit was designed for a particular type of SCR, and mine isn't compatible.
Also, I am an EE student but I am just starting out, I have some circuit theory under my belt, but I am not sure on what to use as a voltage in this circuit, as its all part of the 220V line.
Can anyone help me out?
Sorry for the size of the pictures, but I wanted to keep the detail.
Thank you!