Pedal switch

[WikingWelder]

Not quite sure what you are trying to do. Can you re-cap or draw a picture? You can always add a small transformer is needed. What is the relay to control? pins 1-2, the trigger?

Pins 1-2 are connected by pressing the torch switch. Putting a relay in series with the switch and making it break the connection between pins 6-7 when activated, should make the machine disregard the pot on the pedal control.
Obviously the 1-2 leads from the pedal must bypass the relay or you will loose all regulation possibilities.
This way, when you activate the torch switch, the machine will only see the I/O switch, not the pot. You will of course loose the possibility of tacking with the pedal, but that would be a small sacrifice.
Drawing diagrams is not my strong side, so I hope this will do.

Cheers

[everlastsupport]

Pins 1-2 are connected by pressing the torch switch. Putting a relay in series with the switch and making it break the connection between pins 6-7 when activated, should make the machine disregard the pot on the pedal control.
Obviously the 1-2 leads from the pedal must bypass the relay or you will loose all regulation possibilities.
This way, when you activate the torch switch, the machine will only see the I/O switch, not the pot. You will of course loose the possibility of tacking with the pedal, but that would be a small sacrifice.
Drawing diagrams is not my strong side, so I hope this will do.

Cheers

So you want to use the pedal as just the trigger for spot. One idea and cheap, put a magnetic reed switching inside the machine across 6-7 and stick a magnet on the front outside to open and close it. All welders should have magnets stuck all over That would be simple, no power required. Can get them at all kinds of places too. Maybe the hardware store or alarm shop.

[WikingWelder]

One idea and cheap, put a magnetic reed switching inside the machine across 6-7 and stick a magnet on the front outside to open and close it.

That's a novel idea, but wouldn't it violate the warranty if you start rummaging in the innards of the cabinet?
If some day you pedal doesn't work, maybe it's because someone stuck a holiday postcard on your welder with a magnet
- and it doesn't let you switch easily between torch switch and pedal.

Cheers

[everlastsupport]

That's a novel idea, but wouldn't it violate the warranty if you start rummaging in the innards of the cabinet?
If some day you pedal doesn't work, maybe it's because someone stuck a holiday postcard on your welder with a magnet
- and it doesn't let you switch easily between torch switch and pedal.

Cheers

You didn't ask about the warranty. Then you need to put it a switch on the outside and cut into the connector and void that one. Not sure what the relay is for. Why not buy a new 7 pin plug and just not use 6-7 or add a switch.

[WikingWelder]

Why not buy a new 7 pin plug and just not use 6-7 or add a switch.

That is exactly what I have done, only I bought two so I could switch between pedal an torch control without having to change plugs.

Not sure what the relay is for.

Switching off the pot automatically when using the torch switch

Cheers

[everlastsupport]

That is exactly what I have done, only I bought two so I could switch between pedal an torch control without having to change plugs.

This is the better way, you have two on the pedal and just plug in the one you need.

Switching off the pot automatically when using the torch switch

Ahh. I think the previous way is better, less change of damaging the unit.