Three-coordinate principle

Simply put, a three-coordinate system is a detector that can move in three directions and can move on three mutually perpendicular guide rails. The detector transmits signals in a contact or non-contact way, and the three-axis displacement measurement system (such as optical ruler) calculates the coordinates (x, y, z) of each point of the workpiece and instruments for measuring various functions through a data processor or computer.

At present, the mobile bridge structure is the main structure of small and medium-sized coordinate measuring machines, which has the characteristics of good openness, wide field of vision, convenient up and down, fast moving speed and high precision. Equipped with high-precision guide rail, probe and control system, combined with computer program to automatically control the detection process, so as to calculate and output the measurement results, support the probe replacement frame and image camera, and support the precision turntable. , which can detect the size, shape and mutual position of various parts, and can also perform optical scanning measurement on soft materials or complex parts. Advantages:

1. Simple mechanical structure;

2. High bearing capacity;

3. Good openness and convenient operation;

4. It has its own workbench;

5. External vibration has relatively little influence on it;

6. The accuracy is slightly lower than that of the fixed bridge.

Three-coordinate mainly detects the tolerance of form and position, including: the measurement of geometric elements: point, line, circle, surface, ball, arc, ellipse, cylinder, cone, keyway, curve and surface; The construction of geometric elements: projection, bisection, intersection, tangency, mirror image, fitting, translation, vertical, parallel, combination, rotation, offset line and offset; Form and position tolerance software: straightness, flatness, roundness, cylindricity, taper, sphericity, distance, included angle, verticality, parallelism, inclination, position (2D and 3D), symmetry, coaxiality, concentricity, etc.