Roundness measuring machine

A roundness measuring machine comprising:

• a turntable on which a workpiece is to be placed;
• a displacement detector configured to detect a displacement of a stylus at a distal end of a swing arm;
• a column provided on a base shared with the turntable;
• a Z-axis slider that is supported by the column and is movable in a Z-axis direction extending vertically;
• an X-axis slider that is supported by the Z-axis slider and is movable relative to the Z-axis slider in an X-axis direction intersecting the Z-axis direction;
• and
• an attitude adjusting mechanism that is provided to the X-axis slider and supports the displacement detector such that an attitude of the displacement detector is adjustable, the attitude adjusting mechanism comprising:
• a Y-axis slider that is supported by the X-axis slider and is movable in a Y-axis direction intersecting the Z-axis direction and the X-axis direction, the Y-axis slider being configured to be driven by a Y-axis drive motor;
• and
• a detector holder that is supported by the Y-axis slider and supports the displacement detector such that the displacement detector is turnable around the X-axis direction.