Bedienungsanleitung BandG Zeus Touch (Seite 47 von 66) (Englisch)

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Autopilot | Zeus Touch installation manual

Manually adjusting steering parameters

The autotune function in the autopilot is so re ned that the majority of boats will need no

further adjustments of the steering parameters. On some boats however, or in particular

sea conditions,  ne tuning of the steering parameters may improve the performance of the

autopilot.

Transition speed

Refer previous description.

Rudder

This parameter determines the ratio between commanded rudder and the heading error. The

higher rudder value the more rudder is applied.

If the value is too small it will take a long time to compensate for a heading error, and the

autopilot will fail to keep a steady course.

If the value is set too high the overshoot will increase and the steering will be unstable.

Counter rudder

Counter rudder is the amount of rudder used to try to prevent the boat from yawing around

the set course. Higher counter rudder settings result in more rudder being applied.

The best way of checking the value of the Counter rudder setting is when making turns.

The  gures illustrate the e ects of various Counter Rudder settings;

A: Counter rudder too low; overshoot response

B: Counter rudder too high; sluggish and creeping response

C: Correct setting or counter rudder; ideal response

Auto trim

This parameter de nes how fast the autopilot shall correspond after having registered a

heading error.

The standard value is 40 seconds which should work well on most boats. Rule of thumb: Set

to same value (seconds) as the boat’s length in feet. On boats operating on VRF the value

should be set to 20 seconds.

Rate limit

Sets the maximum allowed rate of turn.

The value should be kept at 6.0°/second unless there is a need for more rapid response in

turns.

Minimum rudder

This parameter  lters small rudder commands to prevent high rudder activity.

Some boats may have a tendency to not respond to small rudder commands around the

“course keeping” position because of a small rudder, a rudder deadband, whirls/disturbance of

the water-stream passing the rudder or it is a single nozzle water jet boat.

By increasing the Minimum rudder parameter you may improve the course keeping perfor-

mance on some boats. This will however increase the rudder activity.

Minimum wind angle to port and starboard

These parameters should be set identical to the minimum apparent wind angle that will keep

the sails well shaped and give an acceptable thrust. The parameters will vary from boat to

boat.

The settings are used for the tack-prevent function. They also applies when the autopilot is

operating in WindNAV mode. Refer to the Operating the autopilot section.

You can select di erent minimum wind angles for port and starboard. The di erence between

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