Specimen geometry is controlled through the machine’s software, which defines gauge length, diameter, and transition radii according to selected standards or custom parameters. During machining, digital readouts and servo feedback maintain consistent tool positioning within a very tight tolerance range. After preparation, specimens are typically checked with calipers, micrometers, or coordinate measuring devices to confirm gauge width and surface finish. The same setup parameters can be stored and reused, allowing laboratories to reproduce identical dimensions across multiple batches.