Patent ID: 6289256
Filing Date: 2001-09-11
Classification: G05B,Y10T

Abstract:
A method of mounting a part onto a body, comprising:moving a part holding member in a vertical direction at a first speed from an initial position to a part vicinal position located above an upper surface of a part positioned on a part supporting surface, a distance between the part vicinal position and the upper surface of the part being equal to a sum of a vertical set positional error of the part supporting surface and a height dimension error of the height of the part;moving the part holding member in a vertical direction at a second speed from the part vicinal position to a contact position whereat the part holding member contacts the part on the part supporting surface, the second speed being slower than the first speed;stopping a movement of the part holding member when the part holding member contacts the part on the part supporting surface; andholding the part using the part holding member after said stopping of the movement of the part holding member;wherein said moving of the part holding member is performed by a driving part driven by electric current, wherein when an amount of the electric current for driving the driving part reaches a threshold value, a determination is made that the part holding member has contacted the part so that the movement of the part holding member is stopped, the amount of electric current being measured after a current stabilization duration is complete, the current stabilization duration being an amount of time for the electric current fed to the driving part to stabilize.