Equipment and methods for testing the repeatability of robotic arm positioning accuracy.

Abstract

The invention relates to a device for testing the repeatability of the position of a robotic arm, comprising a spherical reference object positioned at the work head, three DC laser sensors arranged along three orthogonal measuring axes X, Y, Z intersecting at the measurement point, and a data processor connected to the three DC laser sensors. The three DC laser sensors measure the distance to the surface of the spherical reference object along the three orthogonal measuring axes. From this, the data processor determines the laser contact points on the surface of the spherical reference object, determines the center coordinates of the spherical reference object based on its radius and the geometric relationship of the three measuring axes, and calculates the repeatability of the robotic arm's position based on the set of center coordinates obtained through multiple tests. The invention also relates to the corresponding testing method.Thanks to its non-contact measurement configuration and automatic data processing, the invention helps reduce errors caused by mechanical contact, minimizes manual operations, and supports the consistent assessment of the repeatable positional accuracy of robotic arms.

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