The most recent development from Luren Precision Co., Ltd. is the vertical type CNC gear profile grinding machine, LFG-8040, that can form grind spur and helical gears up to 800 mm (31.7") in outside diameter and maximum module of M20 (1.27 DP). LFG-8040 incorporates the most updated technologies, such as an eight-axis CNC controller with close-loop servo control system, direct drive motor and personal computer to achieve the high precision gear grinding requirements. A window-based user-oriented smart interface developed by Luren is used to operate the LFG-8040. The operator can easily key in gear data, modify gear profile and specify the grinding steps. No NC programming is needed because the grinding program will be generated automatically. Involute profile can be checked easily as desired. K-chart points can be set and adjusted freely by rolling arc, rolling angle or radius on the base circle, and lead modification can be carried out easily as well. The operator can also set up the grinding procedure based on his own data or experience. On-board gear measurement, automatic stock dividing and rotary dressing are also included in the standard machine.