Datasheet
70
15
Conguration of the Base Structure
15.1 General
MINI-X are high-precision components. Flatness requirements of the base structure
are correspondingly high so that surfaceinaccuracies are not transferred to the
guideways.
MINI-X guideways perform best when mounted on a rigid structure with a high level
of geometric accuracy. Inaccuracies in the guideway assembly surfaces have a
negative impact on their overall accuracy, running behaviour, push force and
service life. Unstable assembly surfaces can increase the internal forces within the
guideway assembly, which also adversely affects service life. Due to their lower
rigidity and limited machining accuracy, great care must be taken when designing
base structures made of light metal for high-precision applications.
The guideways are compressed against the mounting surfaces by the attachment
screws with a high level of force. To prevent relaxation of the assembly, a high
surface contact ratio is required. This is achieved by means of high surface quality.
15.2 Surface Quality
The surface quality of the supporting surface does not have a direct influence on
the function and running behaviour of the guideway, but it does on the static
positionaccuracy. Carriages and guide rails are compressed against the mounting
surfaces by the attachment screws with a high level of force. To prevent relaxation
of the assembly, a high surface contact ratio is required. This is achieved by means
of high surface quality.
The accuracy of the application critically determines the required surface quality of
the reference and locating surfaces. It is therefore necessary to ensure the
following:
• High-precision applications max. Ra value of 0.4
• Standard applications max. Ra value of 1.6