Feedback Error Compensation - Parker Compax3 Operating Instructions Manual

Parker EME
Instable behavior
1) Setpoint velocity
2) Actual velocity
3) Following error

Feedback error compensation

Feedbacks with sine/cosine tracks may have different errors. The feedback error
compensation supported by Compax3 eliminates offset and gain errors on both
tracks online.
The feedback error compensation is activated in the MotorManager:
"Feedback system" wizard under "feedback error compensation".
Without compensation
top: Actual current value
bottom: Actual speed value
Type of motor: Parker LMDT 1200-1 ironless linear motor
Linear encoder: Renishaw RGH 24B with 20µm resolution
Servo drive: Compax3
In order to accept the changes in the MotorManager in the project, the individual
configuration pages must be clicked through. In order to make the changes made
in the MotorManager effective in the device, the configuration download in the
C3Manager must be executed.
In the event of formal errors, the feedback error compensation may however be
disadvantageous; therefore it is switched off as a default.
192-120113 N08 C3I12T11 - December 2010
Setting up Compax3
With compensation
Scale:
Current = 50mA/Div
Speed = 0.2mm/s/Div
Time = 3.8ms/Div
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