三坐标测量机软件.pptVIP

Sampling Issues ISO Suggestions on Sampling Strategies If the toleranced feature is a profile, an uniform strategy is adopted that samples at least with a frequency 7 times higher than the frequency of the filter adopted to eliminate the contribution of high frequency components of geometric error. Can we afford this in practice? When dealing with surfaces, profile extraction strategies are adopted. Sampling Issues Profile Extraction Strategies Sampling Issues Profile Extraction Strategies Further investigation is still required… CMM Software Fundamentals of CMM Software Some Concepts Substitute Geometry Computation: A Brief Introduction Sampling Issues DMIS DMIS Programming CMM Software Developers DMIS DMIS Programming An Introduction to DMIS The Dimensional Measuring Interface Standard (DMIS) defines a neutral language for communication between information systems and dimensional measurement equipment (DME). DMIS is an execution language for measurement part programs, guides the analysis of coordinate data to report and tag measurement results that ascertain product/process quality, and provides an exchange format for metrology data such as features, tolerances, and measurement results. Reference: / DMIS DMIS Programming A Typical Setting of DMIS Programs DMISMN/’EXAMPLE OF PROGRAM SETTINGS’,4.0$$ Program Name: ABC123.DMI$$ Author????? : Steve Horsfall$$ Date Written: 11/23/08$$ **** Start of Settings ****UNITS/MM,ANGDECSNSET/APPRCH,5SNSET/RETRCT,1SNSET/CLRSRF,15SNSET/DEPTH,3SNSET/SEARCH,20FEDRAT/POSVEL,MPM,1FEDRAT/MESVEL,MPM,0.1PRCOMP/OND(CMM)=DATSET/MCS DMIS DMIS Programming Why DMIS Programming? Faster in terms of measuring time Measure the parts with the same design using the same program More reliable in terms of measurement result DMIS DMIS Programming On-Line Programming — ‘Self-Teach/Self-Learn’ Programming The user manually operate joysticks the machines with motorised axes to finish the routine of measuring a part The