PI offers rack-mount and modular motion controllers based on ACS hardware. The ACS modular system is organized in three layers: User interfaces (software), motion controllers, and drive modules.
The motion controller communicates with the host software and manages profile generation, trajectory, macros, diagnostics, etc. Position commands are sent to the universal drive modules (third level) via an EtherCAT real-time network. Drive modules include the digital servo processor (DSP) and actuate the motors, handle the feedback devices, manage the I/Os, and analyze the sensor signals for closed-loop positioning control.
Patented features, such as NanoPWM, enable dynamic current control ranges of >100,000:1, resulting in nanometer level tracking accuracy (e.g. for wafer scanning) and standstill jitter of sub-nanometer in metrology applications.
Extensive trigger functionality facilitate laser applications and inspection, and an integrated 3-DOF error compensation and yaw compensation for gantry solutions satisfy the highest demands on accuracy.
The proprietary Servo-Boost algorithm increases robustness, minimizing the effect of external disturbances in real time, while simplifying tuning and optimizing the performance and settling with changing loads.