 Re: Welding
think of welding this way. the voltage controls the profile (flat or not) of the weld, the wire speed simple put controls the amperage. The faster the wire reaches the work, the more amperage the machine uses to melt the wire. As the wire speed and amperage increase the voltage required to produce the same profile increases.
to set your wire speed here are the two main items to remember, if it is to slow it burns back to the tip, to fast and it hits the work and jerks. If you turn the wire speed up or down more than a small amount you will need to adjust your voltage.
The pure argon will work, I would have bought 75/25 for most welding and CO2 for junk iron. 100% argon cost a lot more than 75/25, and until you are ready to tackle your aluminum you don't need it. Also if you have a gas cylinder, most welding stores will let you exchange it for cylinders with other gases. I turned in my argon when it was empty for Helium to fill a bunch of balloons for my buddies wedding. |