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PRÄZOPLAN

Overcoming the limits!

The split µ with multiple output

The most important criteria of effectivity in parts construction are:

QUALITY                 <>     PRECISION AND SURFACE
PRODUCTIVITY     <>     SHORT PRODUCTIVE AND NON-PRODUCTIVE TIMES

In which, on the part of the machine tool:

QUALITY can only be optimized by high rigidity and precision of the guiding system
PRODUCTIVE TIME can only be optimized by high rigidity allowing high metal    removal rates
NON-PRODUCTIVE TIME can only be optimized by high dynamics in speed and acceleration

For the machine tool, the requirements of

DYNAMICS   <>  LOWEST POSSIBLE MASSES
RIGIDITY       <>  HIGHEST POSSIBLE MASSES

are fundamentally opposed to each other. None of the machine concepts available on the market have so far been able to meet the above-mentioned requirements simultaneously in an optimal way.

For the first time in the world, PRÄZOPLAN combines these requirements simultaneously by means of the fundamentally new concept of the aerostatically planar guide, in which a single slide generates the travel directions X and Y simultaneously by sliding over a plane instead of the usual stack of linear guides. It overcomes the physical limits as follows:

PRECISION:    no adding up of the errors of two stacked linear axes, µ accuracy                              through extremely high levelness of the guiding plane

RIGIDITY:         very short force flow from the slide directly into the machine base,                              high-rigidity aerostatics

DYNAMICS:     very compact slides, drive directly in the center of mass, thus no                               vibration excitation

 

1 guide for 2 directions - the PRÄZOPLAN principle

 

CONCEPT

Normally, linear axes are used to generate relative movements between tool and workpiece. For three-axis movements, at least two axes must be stacked on each other to form a compound table on the tool or the workpiece side. This design has the disadvantage that the accuracy of machine tools is directly influenced by this stack. One possibility to reduce the number of blocked degrees of freedom with regard to existing concepts is the use of planar guides. In this concept, a slide is driven by three axes directly on a plane surface. It is only necessary to control two or three degrees of freedom by guiding or drive elements via NC.

 

Further essential advantages such as higher rigidity and lower masses are based on the direct force flow from the TCP to the base and lead to a large potential in the precision guiding, a high accuracy of the position measurement, higher dynamics, reduction of the components in the force flow etc.
Only 3 degrees of freedom are blocked mechanically, a conventionally built compound slide, however, has 10 blocked degrees of freedom due to the two stacked linear guides.

A company of Krause & Mauser Group