Flatness Acquisition and surface mapping phase
A flatness correction algorithm is made of two main phases. The first one is the Flatness Acquisition to map the surface by a touch probe installed in the spindle.
The numerical control executes a path on the workpiece surface and through the probe acquires the points and then stores the value of the Z-axis coordinate at the exact point where the probe touches the material.
Below you can see an example of the route taken to acquire the points in a given area. In this way, the control has created a map of points that will be used during the engraving phase to compensate for the irregularities of the slab’s thickness.