ISO 841 pdf download

ISO 841 pdf download.Industrial automation systems and integration — Numerical control of machines — Coordinate system and motion nomenclature 1 Scope This International Standard describes a machine coordinate system related to the primary motions of individual numerically controlled machines and the associated machine motions. The machine coordinate system is used to provide the coordinates of a moving tool (or a point in the working space or on the drawing) with respect to a stationary workpiece. Thus a programmer can describe the machine operations without having to know whether the tool approaches the workpiece or the workpiece approaches the tool. NOTE 1 Individual numerically controlled machines means that all axes are mounted on one base or frame and all motions are related to one standard coordinate system. NOTE 2 For the sake of simplicity the majority of the text of this International Standard is written in terms accorded to machine tools but nevertheless accorded to numerically controlled machines in general. Coordinate systems and axis motion nomenclature for industrial robots is defined in ISO 9787, Manipulating industrial robots — Coordinate systems and motion nomenclatures. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.ISO 2806:1 994, Industrialautomation systems — Numericalcontrolofmachines — Vocabulary ISO 6983-1 :1 982, Numerical control of machines — Program format and definition of address words — Part1: Data format forpositioning, line motion andcontouring controlsystems 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 2806 apply. 4 Machine coordinate system 4.1 Designation The machine coordinate system is a right-hand rectangular system with the three principal axes labelled X, Yand Z, with rotary axes about each of these axes labelled A, B and C, respectively (see Figure A.1 ).4.2 Origin The location of the origin of the machine coordinate system shall be defined by the manufacturer. 4.3 Z axis 4.3.1 General The Z axis is parallel to the principal spindle of the machine....