Meaning
Three-dimensional deviation analyses characterize the spatial accuracy of a motion system across its entire working envelope. Performing volumetric error mapping involves measuring the difference between the intended position of a tool and its actual location at many points in space. This data is used to improve the precision of large-scale manufacturing and inspection equipment.
Geometric Correction
Understanding the systematic errors in a machine allows for the creation of a digital model that can predict and fix them. During volumetric error mapping, a laser tracker or an interferometer captures the roll, pitch and yaw of each axis. This information is combined into a single table that the machine controller uses to adjust its movements in real time.
Sensor Fusion
Combining data from multiple measurement devices provides a more complete picture of the machine’s behavior. Volumetric error mapping requires the synchronization of the machine’s internal encoders with external metrology tools. This process identifies how the various mechanical components interact to produce the final positional uncertainty.
System Performance
Improving the spatial accuracy of the equipment allows for the production of tighter-fitting parts and more reliable connectivity modules. Validation through volumetric error mapping is often the final step in the commissioning of a new high-precision assembly line. The resulting increase in accuracy reduces the need for expensive manual adjustments and improves the overall yield of the facility.
