Using intelligent servo drives to filter mechanical resonance and improve machine accuracy in printing and converting machinery

White noise

Challenge:

Controlling machine resonance -- the "white noise" generated by machine motion -- in servo-driven printing and converting machines

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Rexroth Solution:

  • Understanding how mechanical resonance and natural frequencies affect control loops
  • White noise tests to identify resonant frequency that needs to be controlled via servo drive tuning
  • Filtering to minimize control loop impact
  • Tuning the position control, velocity and the current loops to match actual and desired motion