CAD/CAM Software
machine configuration. “One of the problems we have is we’re addressing a problem that the market is not particularly edu- cated on,” Gibbs said. “A lot of our customers do basic milling and turning. Every release we put out is divided between do- ing basic improvements and future technology updates.” Other CAM software developers have worked on similar machine kinematics projects. “One of the most fascinating technologies we’ve developed is the incorporation of the kine- matics of exact machine tools, creating virtual machine tools on which the knowledge of the machine is used for not only simulation, but for toolpath calculation,” said DP Technology’s Bartholomew. “The knowledge of the machine’s kinematics and dynamics can be used in programming by incorporating program coordinates and feed rates to optimize acceleration and velocity while eliminating jerk.” Today’s CAM software relies upon a CNC programming model that dates back to the 1960s, Bartholomew noted. “This methodology is a geometric approach that uses little
more than the definition of the part and stock to calculate the resulting toolpath. An evaluation of the CAM systems on the market today reveal that this model has not evolved since the inception of CNC controls,” he said. “Esprit offers a more complete knowledge of the entire machining process, as well as a data-driven, highly optimized and more efficient toolpath- generation engine.” This new technology will overcome many limitations innate to all CAM systems, he added, particularly in the field of five-axis machining.
Tooling Simulation
Simulating 3D cutting-tool models also has become increas- ingly important in recent years, according to Bill Hasenjaeger, product marketing manager, CGTech (Irvine, CA), developer of the popular Vericut NC simulation/verification/optimization package. Cutting-tool developers Kennametal, Iscar and Sand- vik all have projects in various states of completion, projects intended to supply 3D tool models to end-user customers.
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ManufacturingEngineeringMedia.com | March 2014
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