Raymarine Evolution tillerpilot won’t hold course

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Morning coffee question - what *are* the 9 axes these sensors measure?
Heel
Pitch
Yaw
?

9 axis is a bit of creative marketing spin. It has a 3-axis digital accelerometer, 3-axis digital compass & 3-axis gyro digital angular rate sensor.

The EV1 & EV2 also contains the autopilot processor which is why the ACUs are just actuators.

 

[PaulRainbow]

Isn't just a fluxgate? It isn't a fluxgate at all.

I said "The EV1 sensor isn't just a fluxgate, it's a 9 axis sensor"

What's your problem ?

 

[Barton Seagoon]

Please forgive me for reactivating an old thread, but I have solved today the same set of symptoms. The system worked fine all last year until about October. It turns out that at some stage my system had swapped left and right. So whenever we re-ran the setup process and it asked "Did the rudder move to port", we looked at the tiller, which had moved to port, and said Yes. Today, while trying for the fourth time to resolve the problem, I decided to say No. When it asked "did it move to starboard" I said Yes. It then moved the tiller starboard, so I told it the rudder moved to port. Bingo! It no longer veered off course as soon as it was engaged!
I think the reason it was doing this is that soon after taking control the autopilot wanted to make a small correction to it moved the tiller (in the wrong direction). That of course made it worse, so it moved the tiller a bit more. And so on...
I present this sorry tale in the hope thet it may help others who fall into this trap. Of course, tiller to port means steering to starboard. I wish I had found this thread earlier while searching for answers online (and especially post #3 from @fredrussell )

 

[fredrussell]

Glad you sorted it out BG. To you and other EV100 etc owners, I would definitely recommend adding a rudder position sensor if you see one come up cheap on ebay (as they often do)