Top Five CNC Plasma Cutting Cut Quality Problems: Solved!

Lincoln Electric My name is Mark Humphreys with Lincoln Electric Cutting Systems, and today we’re going to go over The top five cut quality problems that our customers encounter during their operations, and we’re tell you how to prevent them There are five factors that have a direct correlation with cut quality: the state of your consumables, cut speed, operating amperage, water level, and torch height. Fine tuning that recipe will have a direct impact on the edge quality of your finished parts. Those parts will have minimum amounts of bevel and dross. Dross is the excess metal accumulation that appears when the operating amperage is set too high, the cut speed is set too low, or the torch is too close to the material. Bevel angle is the angle that the plasma produces through the part from entry to exit. Naturally, plasma arcs are shaped like bulbs, so it can be nearly impossible to reduce your bevel angle down to zero, But with the right combination of fresh consumables and a correct torch height, you can still produce some great parts. Water table water levels also have an impact on edge quality. We’ve found that having a higher water level has a direct correlation with dross accumulation, fume capture, and material warpage. With thin gauge material, having a the water level touch the bottom of the plate quickly dissipates the amount of heat going into the material leading to less material warpage, and more accurate parts. Fume capture is also maximized no matter how thick the material is. In this example, we saw noticeable differences in the amount of dross accumulation when cutting ½ mild steel at two different water levels. one with no water in the table, and one with water touching the base of the plate. Circular parts exaggerate the difference in dross accumulation, where as straight cuts show smaller differences. Having a higher water level also decreases the down time in waiting for the parts to cool, and decreases the risk of being burned. Lincoln Electric gives our customers an easy way to determine the perfect combination for an exceptional cut quality, and it’s called the line speed test This is a CAD file that can be easily found on our ACCUMOVE controllers, and can be easily loaded onto the table to determine the parameters of your job. The line speed test sets a range of cut speeds to determine what will produce the best results in your unique shop environment. Flip over the final result, and choose the best cut quality for your material. Program these parameters into the controller, and you’re ready to cut. Lincoln Electric has also made height control a standard feature on all of our tables through the implementation of ACCUMOVE motion control technology. This allows the controller to sense arc voltage changes throughout the job to establish the best torch height to maintain a consistent cut quality. To find out more information about the Torchmate brand of CNC Plasma cutting tables, click on any one of the videos down below Visit our website, or call a sales rep today!

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