Precise and reliable position feedback is the foundation of efficiency and quality in modern industrial automation. Absolute magnetic measurement solutions from Bogen Magnetics in Germany offer high-resolution, non-contact position detection with robust performance in harsh environments, where optical systems often reach their limits.
At the heart of their technology are two proven principles: PRC (Pseudo-Random Code) magnetic patterns and the Nonius method. These allow for flexible, compact absolute positioning systems with exceptional repeatability even in applications exposed to dust, oil, vibration and extreme temperatures.
Bogen’s PRC-based magnetic scales provide smart precision on a space-saving two-track layout. They encode absolute position data directly into the magnetic pattern on the scale. This allows a two-track configuration to deliver true absolute positioning, even from power-on, without the need for reference runs. Because PRC patterns don’t rely on optical contrast or clean surfaces, they are ideal for compact, enclosed environments in automation systems, particularly where maintenance access is limited or frequent cleaning is impractical.
The Nonius principle takes advantage of the phase difference between two or more tracks with slightly different magnetic pitches. Through clever signal processing, this method achieves significantly higher resolution and accuracy without increasing the physical size of the scale. Bogen’s Nonius-based scales can be implemented with two or three tracks, depending on the precision requirements. They are particularly suited for applications needing sub-micron resolution, such as semiconductor positioning, robotics, automated inspection systems, and high-end CNC machines.
Compared to optical measurement, magnetic measurement wins in harsh conditions, notes Bogen. Optical encoders require clean, controlled environments to function reliably. Any contamination such as dust, oil mist or condensation can lead to signal loss or errors. In contrast, these are situations where magnetic measurement systems can excel while their non-contact operation ensures minimal wear.
A key feature is that they can be perfectly matched with high-performance sensors from the company, optimized to read PRC and Nonius patterns with extreme precision and speed, forming a plug-and-play solution for machine builders, system integrators and OEMs. Applications include robotics and cobots, packaging machinery, semiconductor manufacturing, material handling systems, medical automation, precision axes and linear stages. For more info, see www.bogen-magnetics.com.
