Patent ID: 6915565

Claim:
A method of detecting a position of a rotation axis of a suction nozzle of an electric-component mounting apparatus, the suction nozzle holding, by suction, an electric component, and being rotated about the rotation axis thereof to rotate the electric component held thereby, so that the electric component rotated is mounted on a component-mounting surface of a circuit substrate, comprising lowering a suction nozzle taking a substantially vertical posture, to position the suction nozzle at a rotation-axis detecting position where a lower end surface of the suction nozzle is substantially level with the component-mounting surface of a circuit substrate, and: detecting, on a position-detecting plane including the component-mounting surface of the circuit substrate, the position of the rotation axis of the suction nozzle, wherein the position-detecting plane is co-planar with the component-mounting surface of the circuit substrate.