Three Dimensional Voxel Scale Calibration Methods for Automated Micro-CT Inspection
Calibrating micro-CT voxel scale with certified ball-bar phantoms bounds geometric magnification drift and ensures repeatable automated void sizing.
Thermal Expansion Compensation
Algorithmic Adjustment
Software corrections for the dimensional changes in machine components ensure that measurement accuracy remains stable across varying temperatures. By applying a mathematical model of how materials grow when heated, thermal expansion compensation restores the precision of the x-ray system as it warms up during operation.
Drift Mitigation
Positional errors that would otherwise accumulate during a production shift are neutralized by shifting the coordinate system in real time. Metal frames and glass scales expand at different rates, and thermal expansion compensation accounts for these differences to maintain a consistent relationship between the sample and the detector. This process prevents the blurring of images that occurs when the mechanical home position drifts away from the calibrated zero.
High-resolution 3d scans of complex pcbs require this constant adjustment to ensure that every layer aligns perfectly.
Dimensional Control
Long-term stability of the inspection process allows manufacturers to maintain tight tolerances on solder joint measurements and component placement. Without thermal expansion compensation, a system would require frequent manual recalibration to account for the changing factory environment. The effectiveness of the correction is verified by scanning a stable artifact at regular intervals to confirm that the reported dimensions do not vary.
Consistent data output is the foundation of a reliable quality control program in electronic manufacturing.