Precision in every detail: ZOLLER develops measuring and inspection systems for demanding manufacturing processes.
of the axes is latched – in other words, captured and linked to the corresponding image. Only by combining the pixel data with the pre- cise mechanical position can a usable measure- ment value be obtained. The motion controller therefore acts as the link between image process- ing and mechanics. Without this synchronization, measurements at the micrometer level would not be possible. Georges Pappas explains how this principle works in practice: “Every time the camera captures an image, a trigger signal is sent to the motion controller.” Because the camera operates continu- ously, the corresponding position values must be captured and buffered in real time so that the image and motion data can be correctly matched in the next step. Fabian Vogel, Managing Director of the Multi- Axis Controllers Competence Center at maxon, also sees this as the core of the application: “For us, it is essential to understand the application in detail – how the customer uses the measuring de- vices and what requirements arise during actual
operation. Only then can we tailor the control behavior and synchronization precisely to this specific application.” Capturing and temporarily storing the current axis position at exactly the right moment is crucial for reliable measurement results. Control behavior and dynamics for different measurement methods ZOLLER uses various measurement methods, in- cluding the measurement of contours, cutting edges and runout, as well as the determination of heights and angles. The multi-axis controllers must switch between rapid movements and highly stable stand- still phases. This combination of dynamics and stability places extreme demands on control tuning, drive performance, and real-time behavior. It is precisely this range – from rapid movement to an absolutely stable holding position – that makes the application so demanding. The challenge is not simply to set an axis in motion, but to ensure that it responds exactly as required by each mea- surement method.
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