User manual of EL8-EC***F AC Servo
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Model following bandwidth determines the responsiveness of the servo system. Increase
the value set will increase responsiveness and reduce positioning time. Overshoot can be
prevented if it is set at a lower value but responsiveness will be lowered. Model following
bandwidth shouldn’t be too large for mechanical structure with lower stiffness, excessive
position deviation alarm might occur under high velocity.
6.10 Zero tracking control
Zero tracking control (ZTC) is able to realize a zero position deviation during
acceleration/deceleration. This function increase multi axis precision and master-slave
following.
Recommended application:
1. Multi axis
Improper following during circular arc motion
Improved following
Enable zero tracking control
2.
Master-slave following
Used when driving axis sends frequency divider signal to lead following axis to
improve the following control.
ZTC only available under position control mode.
ZTC can only be enabled when Pr0.00 is valid.
Model following control (MFC) and Zero Tracking Control (ZTC) cannot be used
together at the same time.
Zero tracking control can achieve better performance with the following limiting factors.
Limiting factors
Electronic
gear ratio
Electronic gear ratio should be lower to prevent current noise.
Mechanical
structure
Better structural rigidity to prevent vibration.
