This instructable is focused on the steps to perform regarding the equipment for welding. It assumes that the machine has enough air, the wire is threaded and that all safety is accounted for. It also assumes you have set up your components to weld.
I made this at TechShop Detroit (www.techshop.ws).
Step 1: Move Fume Extractor Over Welding Area
Step 2: Attach Ground Clamp
Step 3: Ensure Adjusting Screw is Loose
Step 4: Open Cylinder using Handwheel
When you fully open the cylinder handwheel you will notice that the cylinder pressure gauge changes from 0 to a value, the maximum of which is 2500 PSI. In this case the pressure is a little over 1000 PSI, enough to weld.