Simrad AP16 Autopilot - strange behavior

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   Hi,

My autopilot
is not able to keep the boat on a straight track. I suddenly make a hard turn
probably 10-20 deg, and then gets back on track. This happens every couple of
minutes.

I can see on
the chartplotter Simrad NSE8 that there is a difference between the COG and
Heading at some courses, maybe 10-15 deg or more. Is it only current/drift that
will make a difference between COG and Heading? Where i sail in Norway it is
not much current, so this might be the cause for the autopilot problem?

I recently
moved the bow thruster battery from the position under the chair in the saloon
to the just beside the thruster. Maybe this is the reason for the strange behavior?

I checked that
there is nothing magnetic close to the compass, so this should not be the
problem.

Do you think I
need to do the “seatrail setup” on the autopilot again? Is this the reason for
the odd behavior?

Edited by toholthe - 06 May 2018 at 21:32

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toholthe Members Profile Send Private Message Find Members Posts Add to Buddy List Commander Joined: 20 September 2017 Location: Norway Status: Offline Points: 129	Post Options Post Reply Quote toholthe Report Post Thanks(0) Quote Reply Topic: Simrad AP16 Autopilot - strange behavior Posted: 06 May 2018 at 21:31
	Hi, My autopilot is not able to keep the boat on a straight track. I suddenly make a hard turn probably 10-20 deg, and then gets back on track. This happens every couple of minutes. I can see on the chartplotter Simrad NSE8 that there is a difference between the COG and Heading at some courses, maybe 10-15 deg or more. Is it only current/drift that will make a difference between COG and Heading? Where i sail in Norway it is not much current, so this might be the cause for the autopilot problem? I recently moved the bow thruster battery from the position under the chair in the saloon to the just beside the thruster. Maybe this is the reason for the strange behavior? I checked that there is nothing magnetic close to the compass, so this should not be the problem. Do you think I need to do the “seatrail setup” on the autopilot again? Is this the reason for the odd behavior? Edited by toholthe - 06 May 2018 at 21:32

toholthe Members Profile Send Private Message Find Members Posts Add to Buddy List Commander Joined: 20 September 2017 Location: Norway Status: Offline Points: 129	Post Options Post Reply Quote toholthe Report Post Thanks(0) Quote Reply Posted: 07 May 2018 at 22:12
	I was out testing today. I believe my rudder feedback unit reports faulty values in some split seconds making the boat turn. Anyone know if it is serviceable?



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