Method for determining correction values for correcting positional measurement errors in a machine having at least one translational axis of movement

In a machine having a mobile head moveable along at least one translational axis of movement, and having first position measuring devices for determining a spatial position of the head along the axis of movement, the first position measuring devices defining a measuring range, a method for determining correction values for correcting positional measurement errors of the position measuring devices, the method comprising the steps of:

• moving the head along a defined path of movement so that the head reaches a plurality of positions,
• recording a plurality of first position data at the positions by means of the first position measuring devices,
• recording a plurality of second position data at the positions by means of a second position measuring device, and
• determining a plurality of correction values as a function of the first and second position data, with the correction values representing an error profile as a function of the positions,
• wherein the first and second position data are recorded for the entire measuring range,
• wherein position-specific errors are determined by means of the error profile,
• wherein the head is moved into a region of a position-specific error, and
• wherein supplementary first and second position data are recorded in the region of the position-specific error in order to increase a correction value density in the region of the position-specific error by determining supplementary correction values from the supplementary first and second position data.

A computer readable medium comprising a computer program having a program code that is designed to execute a method, when the program code is run on a control computer of a machine having a head moveable along at least one translational axis of movement and having first position measuring devices for determining a spatial position of the head, the method comprising the steps of:

• moving the head along a defined path of movement having a plurality of sections, the head assuming a plurality of positions along the path of movement,
• recording a plurality of first position data at the positions of the head by means of the first position measuring devices,
• recording a plurality of second position data at the positions of the head by means of a second position measuring device, and
• determining a plurality of correction values by means of the first and second position data, with the correction values representing an error profile along the path of movement,
• wherein a defined number of correction values is determined for each section of the path of movement, and
• wherein the number of correction values determined per unit distance of travel along said defined path of movement varies as a function of the error profile.

A method for determining correction values for correcting positional measurement errors in a machine having at least one translational axis of movement, the machine having a mobile head and first position measuring devices in order to determine a spatial position of the head, the method comprising the steps of:

• moving the head along a defined path of movement having a plurality of sections, the head assuming a plurality of positions along the path of movement,
• recording a plurality of first position data at the positions of the head by means of the first position measuring devices,
• recording a plurality of second position data at the positions of the head by means of a second position measuring device, and
• determining a plurality of correction values as a function of the first and second position data, with the correction values representing an error profile along the path of movement,
• wherein a defined number of correction values is determined for each section of the path of movement,
• wherein the defined number in each of the sections is varied as a function of the error profile, and further
• wherein neighboring correction values are compared in order to identify position-specific errors, and wherein the number of correction values determined per unit distance of travel is increased for any section with a position-specific error.

A method for determining correction values for correcting positional measurement errors in a machine having at least one translational axis of movement, the machine having a mobile head and first position measuring devices in order to determine a spatial position of the head, the method comprising the steps of:

• moving the head along a defined path of movement having a plurality of sections, the head assuming a plurality of positions along the path of movement,
• recording a plurality of first position data at the positions of the head by means of the first position measuring devices,
• recording a plurality of second position data at the positions of the head by means of a second position measuring device, and
• determining a plurality of correction values as a function of the first and second position data, with the correction values representing an error profile along the path of movement,
• wherein a defined number of correction values is determined for each section of the path of movement,
• wherein the defined number in each of the sections is varied as a function of the error profile, and further
• wherein the error profile is subjected to a frequency analysis, with a position-specific error being assumed when the error profile exhibits a spatial frequency that is higher than a defined reference frequency, and wherein the number of correction values determined per unit distance of travel is increased for any section with a position-specific error.