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Digital positioning controller enables real-time positioning of synchronized multi-axis systems

April 30, 2012 // Julien Happich

Digital positioning controller enables real-time positioning of synchronized multi-axis systems

The digital positioning controller EPOS3 70/10 EtherCAT from Maxon Motor meets the highest demands in real-time positioning of synchronized multi-axis systems.


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Extremely compact in size, the EPOS3 possesses a wide nominal power supply voltage range from 11 to 70 VDC and delivers a continuous output current of 10 A, during acceleration and deceleration even up to 25 A. Designed for DC and EC motors with a power range up to 700 Watt, it provides outstanding uniform running for motors equipped with incremental encoders. The EPOS3 70/10 EtherCAT easily integrates as slave into real-time EtherCAT protocol-based Ethernet networks, and, with the provided device description file and device-specific configuration guide. A multitude of operating modes allows efficient, flexible use in a wide range of drive systems in robotics, automation, and mechatronics. The positioning controller supports a broad bandwidth of encoders.

In the typical EtherCAT modes "Cyclic Synchronous Position (CSP)", Cyclic Synchronous Velocity (CSV), and Cyclic Synchronous Torque (CST), the EtherCAT master calculates the trajectory points and sends the target parameters cyclically and synchronous via EtherCAT network to the EPOS3. A bundle of additional features, such as speed control with given target velocity in Profile Velocity Mode (PVM), Homing to a defined mechanical position using numerous implemented methods is available. The same applies for the generous number of inputs and outputs, which makes the extra EtherCAT I/O module obsolete.

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