Lineární vedení Schneeberger MINIRAIL - EN

70 15 Configuration of the Base Structure 15.1 General MINI-X are high-precision components. Flatness requirements of the base structure are correspondingly high so that surface inaccuracies 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 position accuracy. 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