Tig pedal potentiometer

[Ricardo]

Hi everyone want to ask if anyone can help me so I have a basic tig pedal on my machine and when you connect it the current gets controlled only by the pedal and the knob does not work in conjunction with the pedal so I see on some other machines the pedal has a knob on it so you set it to a point and then when you max out the pedal it can only go so much because of the knobs position on the pedal . So my question is does anyone know how to wire a knob into the pedal itself if you get what I'm trying to say . Thanks

[bobadame]

I have a sewing machine motor that works that way. It is 2 variable resistors in series. One is a rotary potentiometer, the other is a 6 position variable resistor switch.

[Ricardo]

Well I think I only need to put a potentiometer but there is three wires on the pedal yellow brown and blue

[bobadame]

In my example the 6 position switch could be replaced by a second potentiometer. The 3 wires on your pot are ground, input and output. To wire 2 pots in series; with the pot shafts facing up the first terminal is ground, the second terminal is input and the last is output. On your pot the brown wire is probably connected to ground. Verify this with an ohm meter. There should be continuity between this wire and the case of the pot.

So to add another pot in series you would wire the third terminal on the first pot to the middle terminal of the second pot. The third terminal on the second pot is the final output.

The first terminal on both pots should be connected to ground.

[Ricardo]

As you can see this is my pedal box it's very basic and that's the pot works with the machine which just controls the current so I'll have to just get a rotary potentiometer and connect it the way you just have said

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[Ricardo]

What I was also planning is to not put the potentiometer on the pedal box but make it external in a different box with wires going to the pedal box with those male and female plugs I think it would be easier to adjust when welding instead of bending down to get it and adjust it