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There are many ways to weld and when you need high heat plasma cutting is your best way to do it. You will find that plasma and the plasma arc process has been refined so you can get a better quality cut at higher speeds with a lower cost. You can also find that gouging and piercing will go a lot smoother.
Generally speaking plasma cutting is a simple technique to learn though the process seems complicated. Plasma cutting is also safer than using oxyfuel because there are no flashbacks or dangers from flammable gas like there is in oxyfuel gas cutting.
When you have a metal that you want to cut and it is a good electrical conductor, plasma cutting is the best way cut it.
How To Set Up the Plasma Cutter for the Best Cut
When you first start the cut the torch should be as close as you can get it to the base metal’s edge. Next press the trigger so you can start the pre-flow air and light the pilot arc. When you see that the cutting has started, control the torch so that it moves slowly across your project. You may need to adjust the speed to keep the sparks under the bottom of the metal. Watch the metal because if you do not see sparks under the bottom then you are not getting through the metal. If this is the case, slow down your movement and check the amperage of the plasma stream; make sure that you are holding it at an angle.
As you are finishing the cut, put the torch at a slight angle or pause it so that it will automatically finish the cut.
How To Make A Perfect Gouge
To do this you should place the torch at a 40 degree angle to the base metal. As you see the cutting arc igniting, make your arc a short distance from your work. You may have to adjust the length of the arc and the travel speed so that you are able to control the gouge. You do not want to cut it too deeply at first because you may have to do more than one pass if you are attempting to go through thick metal.
Plasma cutting is a skill that needs to be practiced just like any other welding technique. With these tips you may find that your practice goes smoother.
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