Edwardpic, here are some pictures of some .080 aluminum I cut with my dynatorch. The cuts are excellent with no dross. I keep the joystick in hand and use the feedhold feature to stop the machine between pierces to let it cool so it won't warp the material. A spray water bottle works great if needed to control the heat. The cuts I did in the picture required stopping once briefly. The only problem you have to watch for is if the material gets warped and the torch goes down for a initial height sense the material will flex down with the pressure of the torch and then raise back up causing the torch to ignite while still touching the material. To prevent this when I am doing a cut I stop the program between pierces and if neccessary lay a piece of steel for a weight in the area of the next pierce to hold the material down. I have cut .060 aluminum with success using this method. I have a 1250 hypertherm running at 84 sp , 150 inches per minute, running at 40 amps with a fine cut nozzle. I have not tried any 3/16 and thicker aluminum yet. Have you? If so what are your settings and how was the cut quality? |