ISO 230-1-2012 pdf free download.Test code for machine tools Part 1:Geometric accuracy of machines operating under no-load or quasi-static conditions
Code d’essai des machines-outils — Partie 1: Exactitude géométrique des machines fonctionnant a vide ou dans des conditions quasi-statiques.
b) a straight line (axis average line or intersection of planes), or
C) the trajectory of a functional point on another linear moving component
require disregarding (avoiding) the effects of local perturbations on the trajectory itself and the effects of local perturbations on the reference (datum) element. These objectives are reached by associating the relevant reference straight lines to linear motion trajectories and by associating the reference straight line or the reference plane to datum elements; thus, new definitions for squareness error arid parallelism error related to axes of motion (as opposed to the definitions contained in the previous edition of this part of ISO 230) do not include straightness and flatness deviations.
Definitions (as opposed to the previous edition of this part of ISO 230) for parallelism error, related to linear and rotary axes of motion, consider the term ‘parallelism’ as the property of two straight lines that have the same angle of indinatlon to the abscissa of a common coordinate plane.
Definitions (as opposed to the previous edition of this part of ISO 230) for squareness error, related to linear and rotary axes of motion, consider the term squareness* as the property of two straight lines where the angle between the two is 90°.
Error parameters for orientation of coordinate axes are identified by the following notations: The first character after E (for error) is the name of the axis corresponding to the direction of deviation, the second character is the numeral 0 (zero) accompanied with the chosen reference (datum) axis, the last character is the name of the coordinate axis of concern (see Annex A).
EXAMPLE 1 Squareness error of Z relative to X: if X is primary or secondary axes the notation may be
simplified as E.
EXAMPLE 2 Parallelism error (in ZX plane) of Z relative to W: E8<.
NOTE The actual trajectory of the functional point of a moving component, commanded to move along a nominal straight-line trajectory, is not a straight line. Measurements constitute a sampling of the actual trajectory and a limited representation of it. Parallelism error and squareness error, related to linear and rotary axes of motion, are defined considering the angular relationship between the reference straight lines associated with the measured deviations of the actual trajectories.
These new definitions in this edition shall not be confused with parallelism error and perpendicularity error of components and machine functional surfaces addressed in 3.9, where direct compliance to parallelism error and perpendicularity error definitions derived from other International Standards (e.g. ISO 1101) is specified.
3.6.2
parallelism error between two axes of linear motion
angle between (orientation of) the reference straight line of the trajectory of the functional point of a linear moving component and (in relation to) that of another linear (datum) component, measured on two common orthogonal planes.ISO 230-1-2012 pdf free download.