Method for determining friction characteristics in rail-ball rolling guide, involves detecting speed deviations over changes of current, and calculating variance of friction force of carriage in guide over traveled path from deviations

摘要

The method involves creating a movement path required for measurement of a mechanical carriage guide by shifting a carriage (1b) using a linear motor (4) integrated with a plunger coil drive. The linear motor accelerates the carriage to a defined, constant moving speed. Position-dependent deviations of the moving speed over changes of a linear motor drive current are detected. A variance of friction force of the carriage in the guide over a traveled path is calculated from the detected deviations. An independent claim is also included for an apparatus for determining friction characteristics in a mechanical carriage guide i.e. rail-ball rolling guide.