Device for use in a numerically controlled machine tool for application in a method for measuring the numerically controlled machine tool

A method for measuring a numerically controlled machine tool, said method comprising:

• receiving a measuring apparatus on a work spindle of said machine tool,
• mounting a device on a linearly and/or rotationally displaceable machine part of said machine tool, wherein said device comprises a first measuring element for measuring via a measuring apparatus, a second measuring element for measurement via said measuring apparatus, a spacer element on which said first measuring element and said second measuring element are arranged spaced apart from each other, and at least one fastening portion for fastening said device to said machine part of said machine tool,
• determining a respective actual position of said first measuring element with said measuring apparatus in at least two positions of said machine part on said machine tool,
• determining a respective actual position of said second measuring element with said measuring apparatus in at least two positions of said machine part on said machine tool,
• determining one or more coordinate reference parameters of one or more controllable axes of said machine tool based on the determined actual positions of said first and second measuring elements in the at least two positions of said machine part of said machine tool, the respective target positions of said first and second measuring elements in the at least two positions of said machine part of said machine tool, and a known distance between said first and second measuring elements.

A method for measuring a numerically controlled machine tool, said method comprising:

• receiving a measuring apparatus on a work spindle of said machine tool,
• mounting a device on a linearly and/or rotationally displaceable machine part of said machine tool, wherein said device comprises a first measuring element for measuring via a measuring apparatus, a second measuring element for measurement via said measuring apparatus, a spacer element on which said first measuring element and said second measuring element are arranged spaced apart from each other, and at least one fastening portion for fastening said device to said machine part of said machine tool,
• sensing an ambient temperature of said machine tool,
• determining a respective actual position of said first measuring element with said measuring apparatus in at least two positions of said machine part on said machine tool with respect to the sensed ambient temperature of said machine tool at a time of the respectively determined actual position of said first measuring element,
• determining a respective actual position of said second measuring element with said measuring apparatus in at least two positions of said machine part on said machine tool with respect to the sensed ambient temperature of said machine tool at the time of the respectively determined actual position of said second measuring element,
• adjusting the respectively determined actual positions of said first and second measuring elements with respect to the respectively sensed ambient temperature to a reference temperature of said machine tool,
• determining one or more coordinate reference parameters of one or more controllable axes of said machine tool based on the determined actual positions of said first and second measuring elements in the at least two positions of said machine part of said machine tool with respect to said reference temperature of said machine tool, the respective target positions of said first and second measuring elements in the at least two positions of said machine part of said machine tool with respect to said reference temperature of said machine tool, and a known distance between said first and second measuring elements with respect to said reference temperature of said machine tool.