Centering interface of a workpiece carrier

A workpiece carrier (1), comprising:

• a table adapter (10);
• and
• a workpiece carrier base (40),
• wherein the table adapter (10) is detachably mounted on a table (2) of a measuring instrument or a machine tool,
• wherein support points (60, 80, 100) of three different types are arranged between the table adapter (10) and the workpiece carrier base (40),
• wherein a first support point (60) of a first of the three different types of support points comprises a first rotary body (61) and three first balls (64-66), which the first rotary body (61) contacts in three first contact points (67-69), the center points of which form a triangle,
• wherein a second support point (80) of a second of the three different types of support points comprises a second rotary body (81) and two second balls (85, 86), center points of the second balls (85, 86) together with second contact points (87, 88) located between the second balls (85, 86) and the second rotary body (81) forming a plane (93) that intersects an axis of rotation (82) of the second rotary body (81),
• wherein a third support point (100) of a third of the three different types of support points comprises a first contact element (101) with a spatially curved first front side (102) and a second contact element (103) with a flat or spatially curved second front side (104), the first and the second front side (102, 104) being in contact with each other at a third contact point (105),
• wherein the first rotary body (61), the second rotary body (81), and the first contact element (101) are arranged on either the workpiece carrier base (40) or on the table adapter (10), and
• wherein the table adapter (10) and the workpiece carrier base (40) can be clamped against each other after mutual positioning by a clamping system (120).