TIG electrode preparation
Now that you have a capable welding machine you need to prepare the electrode. This affects the way the arc starts and how it behaves. Controlling the arc is crucial for precision welding and correct penetration. It pays to spend some time getting the electrode ready to the best of your abilities.
Here is an article that covers many of the issues concerning tungsten electrode preparation. It contains basic information and is a good place to start.
This article is actually a mini-manual on tungsten electrodes and is much more comprehensive. It warrants careful study and will help you decide what electrodes to use and how to prepare them for any situation.
If you need to cut an electrode to allow your torch to fit into tight places, it is best to use a diamond cutoff wheel dedicated to this task only. You will also need a fixture to hold the tungsten securely on both sides of the cut.
This is also a good video
You may be dismayed at the high cost of professional tungsten cutters and sharpeners. If you don't mind Chinese knock-offs, here is an inexpensive solution to the sharpening task. It consists of a dedicated high-speed electric grinder with diamond wheels and a special fixture on the end that holds the electrode at the precise included angle for the grind you want.
Whatever solution you choose, be sure to wear a respirator when sharpening or cutting tungsten electrodes. Many claim the dust from this process is toxic and should not enter your lungs. The CDC recommends wearing a suitable dust mask, and this article explains the way tungsten enters and exits the body. Note that tests with animals indicate it takes a large amount of exposure to experience any symptoms, and that normal levels of exposure from the environment are innocuous.