Flexible in-process inspection through direct control

Coordinate measuring machines (CMMs) are used in most manufacturing processes. Efforts are being made to reduce the time and cost of measurement by measuring a part directly on the cutting machine. Research in Direct Machining and Control (DMAC) at Brigham Young University (BYU) has identified an improved application of CMM technology on machine tools. A machine tool was controlled as a CMM by integrating the PC-DMIS measurement software package, provided by Wilcox Associates, Incorporated (WAI), with the DMAC controller provided by Direct Controls, Incorporated (DCI). The DMAC controller can be directly controlled by CMM software such as PC-DMIS to conduct in-process dimensional inspection of parts. This process is referred to as DirectCMM because the DMAC controller communicates directly with PC-DMIS without need for post-processing. This research lays the groundwork for future efforts at developing systems that utilize in-process part inspection to dynamically correct computer aided manufacturing (CAM) process plans.

[1]  W. Edward Red.  A dynamic optimal trajectory generator for Cartesian Path following , 2000, Robotica.

[2]  Glen Mullineux,et al.  The Integration of Coordinate Measuring Machines within a Design and Manufacturing Environment , 1993 .

[3]  D. K. Harrison,et al.  Effecting in-cycle measurement with preteritic CNC machine tools , 1996 .

[4]  S. Schofield,et al.  Open Architecture Controllers for Machine Tools, Part 1: Design Principles , 1998 .

[5]  P. L. Primrose,et al.  Identifying the financial advantages of linking computer systems within manufacturing companies , 1986 .

[6]  G. Pritschow,et al.  Open System Controllers – A Challenge for the Future of the Machine Tool Industry , 1993 .

[7]  K. D. Oldknow,et al.  Design, implementation and validation of a system for the dynamic reconfiguration of open architecture machine tool controls , 2001 .

[8]  Suk-Hwan Suh,et al.  Enhancement of geometric accuracy via an intermediate geometrical feedback scheme , 1999 .

[9]  A. Galip Ulsoy,et al.  Real-Time Open Control Architectures and System Performance , 1996 .

[10]  Craig M. Shakarji,et al.  Least-Squares Fitting Algorithms of the NIST Algorithm Testing System , 1998, Journal of research of the National Institute of Standards and Technology.

[11]  Fu-Chung Wang,et al.  Open Architecture Controllers for Machine Tools, Part 2: A Real Time Quintic Spline Interpolator , 1998 .

[12]  W. Sperling,et al.  OSACA-the vendor neutral Control Architecture , 1997 .

[13]  John Peterson,et al.  Open architecture CMM motion controller , 2001, Optics East.

[14]  David S. Cochran,et al.  The Total Source Error of Adjustment model: A methodology for the elimination of setup and process adjustment , 1991 .