Requalification Protocol Execution for Relocated Multiaxis Measurement Jigs
Requalification of relocated multiaxis measurement jigs mandates thermal soak, 21-parameter laser kinematic mapping, and ISO 10360 volumetric acceptance signoff.
Volumetric Error
Meaning
Total three-dimensional vector deviation represents the difference between the actual position of a probe and its commanded position within a work zone.
Vector Combination
Calculation combines the linear and angular errors of all axes along with the squareness errors into a single value for any point in space. The volumetric error is the magnitude of the displacement vector between the true coordinate and the measured coordinate. It provides a single metric for the overall accuracy of a coordinate measuring machine or a machine tool by summing the influence of every geometric defect.
This calculation must account for the fact that errors in one axis can be magnified by the position of another axis.
Map Generation
Compensation software uses a grid of measured points to create a digital correction table for the entire machine volume. This map allows the controller to subtract the volumetric error from the raw axis readings in real-time. Modern systems use these maps to achieve high precision without requiring perfect mechanical alignment.
System Performance
Testing according to international standards like ISO 10360-2 provides a way to verify the maximum volumetric error. This value is the primary specification used by buyers to select a machine for a specific tolerance requirement. It summarizes the combined effect of all geometric and thermal influences on the measurement result.