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Step 5Wirefeed Speed
The gun has two wires coming out of it. One is thick and one is thin. The thin one powers the wire feeder. Inside the handle of the gun there's a DC brush motor with a gear reduction turning a pair of pinch rollers that push the wire forward.
The speed of a DC brush motor is proportional to the voltage. That works out well for this gun, since the higher the welding voltage, the faster it spews out wire.
This particular wirefeeder seems to feed at just the right speed for whatever welding voltage I'm using.
If you want a different speed, try hooking the thin wire to different voltages in your battery bank. To get a continuously variable speed, use a variable DC powersupply for it. A small one will do.
Or butcher a battery powered electric drill for its speed controller.
Replace the trigger potentiometer with a rotary one of similar resistance.
Welding books have tables for voltage and wirefeed speed for welding different materials.
To measure the speed of your wirefeed, press the trigger for one second and measure the length of wire that comes out.
The speed of a DC brush motor is proportional to the voltage. That works out well for this gun, since the higher the welding voltage, the faster it spews out wire.
This particular wirefeeder seems to feed at just the right speed for whatever welding voltage I'm using.
If you want a different speed, try hooking the thin wire to different voltages in your battery bank. To get a continuously variable speed, use a variable DC powersupply for it. A small one will do.
Or butcher a battery powered electric drill for its speed controller.
Replace the trigger potentiometer with a rotary one of similar resistance.
Welding books have tables for voltage and wirefeed speed for welding different materials.
To measure the speed of your wirefeed, press the trigger for one second and measure the length of wire that comes out.
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