Simrad Autopilot AP26 - Manual (Page 91)

Maintenance
20221586B
89
Rudder Feedback Calibration
Make sure the RF300 is installed and aligned as pr. instruction in
section 3.6 (or eventually section 3.27 for LF3000). This
function enables you to compensate for any non-linearity in the
transmission between the rudder and the rudder feedback.
Confirm Rudder feedback
calibration to STBD by
turning the course knob
clockwise.
Manually turn the helm/wheel to starboard until the rudder stops
at starboard lock (H.O.).
The value on the display is
the angle read by the rudder
feedback unit before any
adjustment is made.
If the actual rudder angle is different from that of the display,
correct the reading by turning the course knob clockwise to
increase the value or counter clockwise to decrease the value.
See note.
Advance to the next step by pressing the STBD button.
Manually turn the helm to port until the rudder stops at
maximum port rudder.
Adjust the displayed angle the same way as for starboard rudder.
Note ! Many boats have ±45° (90° H.O. - H.O.) rudder angle as
standard. So if you are not making any adjustment to the display
readout (i.e. not turning the course knob), the autopilot will set a
(default) value of 45° to each side. However, you should always
simulate an adjustment by tuning the course knob forwards and
back again. This is necessary to prevent the rudder from hitting
the end stops.
Rudder zero may still be inaccurate and should be adjusted later
during sea trial.
Proceed to next menu item by pressing STBD button.