Roundness High Accuracy (Dim)

The National Physical Laboratory [NPL] requirement is for a high accuracy roundness measurement system with nanometre resolution for the calibration of hemispheres. The system should incorporate a rotary stage to allow for multi-orientation spindle/component error separation. Data should be able to be collected at user programable rotations and stored as an ASCII file. The work table diameter shall be approximately 300 mm in diameter and be able to accommodate parts of the order of 500 mm in height. The system should be programmable to allow automatic measurement sequences.