Surface tracer detecting three-dimensional coordinates of workpiece

摘要

X-,Y-and Z-axis sliders are supported on a base to be slidable perpendicularly to each other. A probe connected to the Z-axis slider contacts the surface of a workpiece. A spring suspends the group of sliders from the base, and a second spring provides a returning force to return the base to an origin position in the X,Y-axis plane.Pressurised air is directed to the sliding face of each of the sliders to form respective air bearings. The return spring comprises a rectilinear element having one end connected to the X-axis slider carrying the probe, the other end of the element being supported for sliding movement relative to the base longitudinally of the element