Coordinate Measuring Machine Baseline Calibration Steps before Equipment Relocation
Pre-move CMM baseline calibration extracts ISO 10360 error maps and thermal vibration logs to lock down machine accuracy and transfer transport liability.
Axis Squareness
Meaning
Geometric alignment between two perpendicular motion travel paths defines the orthogonal relationship in multi-axis positioning systems. When this orthogonal relationship deviates from ninety degrees, the resulting deviation represents axis squareness error. This parameter dictates the accuracy of volumetric interpolation in precision machinery.
Geometric Error
Inaccuracies in the assembly or mechanical wear of linear guide rails generate systematic coordinate shifts during multi-axis operations. As a machine tool or coordinate measuring device travels along its trajectory, axis squareness failures introduce positional errors that scale with the distance traveled. These errors propagate through the workpiece, causing holes to be bored at incorrect angles and milled profiles to distort.
Verification Method
Metrological standards outline the procedures to quantify the angular deviation between orthogonal paths. Using a high-precision squareness gauge or a laser interferometer with a pentaprism, test engineers evaluate the orthogonal offset by taking measurements at multiple positions along each axis. These raw measurements undergo mathematical compensation to isolate the geometric component from thermal or random fluctuations.
Such diagnostic sequences occur when qualifying a finished stage assembly before it leaves the factory floor.
Assembly Tolerance
Acceptable limits for orthogonal deviation are typically specified in arcseconds or micrometres per metre. A low value for axis squareness ensures that multi-axis stages execute planar paths with negligible distortion.