The servo performance of an axis can be defined and measured by three main parameters: settling time, jitter (standstill when motor is under servo) and constant velocity. With our advanced software tools including a four-channel soft-scope, these three parameters are easily monitored and analyzed.
Minimum Settling Time
Axis settling time has a direct impact on total machine throughput. With our 20kHz high-rate servo control loops, advanced control algorithms and professional analysis and adjustment tools, the settling time of an axis can be reduced to a minimum. Depending on specific application characteristics, a settling time of a few milliseconds is possible. By defining axis stabilization and duration windows, settling time can easily be monitored.
Minimal Jitter
Standstill jitter is a critical factor in many high-end applications like wafer inspection or precision inspection systems. Using the SPiiPlus 20kHz servo rate, Sin-Cos encoder multiplier and advanced control algorithms, jitter can be reduced down to ±1 feedback count. This low jitter can eliminate the need for mechanical brakes to hold the axis during standstill.
Fine Constant Velocity
Constant velocity is also a critical factor in scanning applications. With our advanced algorithms, including special torque ripple compensation (cogging), constant axis velocity can be significantly improved to less than 1% of the specified velocity. Our SPiiPlus products include a dedicated tool to accurately monitor the constant axis velocity.
