VIRTUAL INSTRUMENTATION, OVERCOMING NON-LINEARITIES WHEN ERRORS OF MULTIAXIS MACHINES ARE AMPLIFIED

Metrology, is to empathise properties that put instrumentation away from idealisations. In actual instrumentation, geometric deviations trend to occur in relations 10-5, 10-7 of maximum displacements, requiring their representation in amplified way. If distortion of mechanisms is amplified hundreds times for its representation in CAD, many problems occur: linearity is lost between geometric relations; it is difficult to represent errors simultaneously for many axis and many degrees of freedom; operation of mechanisms doesn't satisfy cinematic of rigid body. Since linearity is lost between linear and angular displacements, between articulate and operational spaces, and between real and amplified representation, it is necessary to apply functions and mapping procedures for relating them. Those mapping errors and their functions are important goals in the field of calibration, where virtual mechanical instrumentation may illuminate cases of controversy. The manuscript treats with several cases of distortion, their possibilities of amplification, their possibilities of assembling, and diagnostic trough inverse kinematics