Oscillation before reaching the desired positioning accuracy

  • If the system oscillates and the positioning operation is not sufficiently accurate, gradually increase the "Time constant" of the combined encoder evaluation by 10% under [Drive trains] > [Optimization AS1] > [Combined encoder evaluation].
  1. If this does not lead to a better result, first reduce the Stiffness of the control parameter under [Drive trains] > [Optimization AS1] > [Dynamic behavior] to reduce the responsiveness of the speed controller.
  2. Then optimize the position controller by adjusting the "P gain" as described in Step 7: Optimize the configuration value for the P gain of the position controller (optional).
  • Note that each time theStiffness of the control orBacklash setting parameter is changed, a new SEW‑EURODRIVE recommended value for the P gain of the position controller is calculated immediately. It is possible to lock the P gain parameter of the position controller using the [lock icon] next to the parameter so that the value is not adjusted when the Stiffness of the control or Backlash setting parameter is changed.