Data Collection
The term used to describe the action of drawing the stylus across the component and acquiring data from a transducer.
Datum
A fixed reference to which analysed data can be compared. For example, when measuring cylindricity, it is possible to store the cylindricity axis as a datum. It is then possible to use this is a reference for further analysis such as measuring flatness of the cylinder top and analysing for squareness to the stored cylinder axis.
