Coordinate measuring machine (CMM) and method of compensating errors in a CMM

A method of compensating errors in a coordinate measuring machine, which determines at least one space coordinate of a measurement point on an object to be measured, the coordinate measuring machine including at least one linear drive mechanism for provision of movability of a probe head in a first direction, with a linear guide in the first direction, a movable member being supported for movement along the guide by bearings, and a linear measuring instrument for determining a first drive position of the movable member in the first direction in parallel to the linear guide, the method comprising:

• measuring at least two distances from the movable member to the guide in a direction being non-parallel with respect to the first direction by using at least a first pre-calibrated integral sensor-package having at least two displacement sensors, the two distances being bearing distances between mutually facing surfaces of the movable member and of the guide, wherein the sensed distances indicate at least an actual translational displacement of the movable member from an ordinary bearing position in a direction perpendicular to the first direction as well as a rotational displacement of the movable member;
• and
• compensating the errors by using at least the determined actual displacements of the movable member.

A method of determining at least one space coordinate of a measurement point on an object to be measured using a coordinate measuring machine including at least one linear drive mechanism for provision of movability of a probe head in a first direction, with a linear guide in the first direction, a movable member being supported for movement along the guide by bearings, and a linear measuring instrument for determination of a first drive position of the movable member in the first direction in parallel to the linear guide, wherein the space coordinate is determined as a function of at least the first drive position and wherein errors are compensated by the method according to 15.