Machine zero point

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The machine zero point is the origin of the coordinate systems in machine tools in order to measure the position of points and objects in space.

Representation of the machine zero point according to DIN 55003

The zero point of a programmable machine serves as a clear reference in order to be able to measure the working space with coordinates . This is necessary for the reproducible production of components and makes it possible to precisely approach every point in the machine's work area with process reliability. The machine zero point is defined by the machine manufacturer, stored as a parameter in the memory and can be changed by the user, e.g. B. when processing an NC program, can no longer be changed.

Position of the machine zero point on a lathe

The machine zero point does not have to be approached by the axes of the machine tool and can be located outside the work area at a mechanically and thermally favorable point. A fixed reference point is required for this, which is based on the machine zero point and is usually the origin of the machine tool's measuring systems . This value is also specified by the machine manufacturer as a fixed distance from the machine zero point.

With lathes , the machine zero point is usually on the spindle axis on the stop surface of the chuck , with milling machines on a corner of the machine table .

The machine zero point and the reference point both represent so-called reference points as the origin of a coordinate system. These were originally described within a DIN standard .

literature

  • DIN 55003-3: 1981-08 machine tools; Pictograms; Numerically controlled machine tools . (withdrawn since 2007)

Individual evidence

  1. ^ A b Alfred Böge: The Technician Handbook . Springer-Verlag, 2013, ISBN 978-3-322-83499-7 , pp. 1538 ( google.de [accessed on February 28, 2020]).
  2. ↑ a b Herwig Braun: Metal Expertise: Hauptbd. 52nd edition. Verlag Europa-Lehrmittel, Nourney, Vollmer, Haan-Gruitem 1996, ISBN 978-3-8085-1152-7 , p. 508 ( google.de [accessed on February 28, 2020]).
  3. ↑ Manfred Weck: Machine tool manufacturing systems: Automation of machines and systems . 5th edition. Springer-Verlag, Berlin Heidelberg 2013, ISBN 978-3-662-10924-3 , p. 231 ( google.de [accessed on February 28, 2020]).