Engineering Tools

Closed-Loop Bandwidth Estimator

Select real stage presets (PI, Aerotech, Queensgate), controllers (E-727, E-712, SPiiPlus, Galil), and encoders (Renishaw, Heidenhain, Attocube). Three-limit bandwidth model with Bode plot, payload sensitivity table, and upgrade recommendations referencing actual products.

Application Quick-Select

Application preset

Stage / Actuator

Stage type

Queensgate NPS-XY-100A, Aerotech QNP-XY

Resonant frequency, unloaded (Hz)

Typical CL BW: 100-300 Hz

Effective moving mass (g)

Payload mass (g)

Max rated payload: 200 g

Tuning aggressiveness

1/3 of resonance (good tuning)

Controller

100 kHz sensor sampling, DSP 375 MHz

Servo update rate (kHz)

Control architecture

System damping ratio (ζ)

Typical: 0.5 to 1.0. Underdamped below 0.7, critically damped at 1.0.

Encoder / Sensor

Encoder

Incremental, <1.6 nm RMS noise

Resolution (nm)

Noise floor, RMS (nm)

Max stage velocity (mm/s)

For encoder noise bandwidth calculation.

Trajectory Requirements

Trajectory type

Step size (µm)

Required settling time (ms)

Settling criterion