Why does PlasmaCAM use steel frame components instead of aluminum?
PlasmaCAM machines are made from laser-cut, cold-rolled steel components. Steel is much more durable and has a higher melting point than aluminum. Our precision manufacturing process allows higher accuracy as well. Comparing tolerances, our guide rails are about 3 times straighter than standard aluminum extrusions.
Another benefit of an all-steel frame is that temperature distortion is avoided. If we used aluminum frame pieces, we would still have to bolt steel parts to them (like gear racks and guides). This would create bi-metal strips that actually curve under temperature changes. Also, the whole table would grow and shrink under the material. But since all steel is used, the machine remains accurate to the material.