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Raymarine Ev-200

Old 11-18-2016, 02:36 AM
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Default Raymarine Ev-200

Have been noticing when underway that my AP does S turns in both auto or in route to waypoint , can be as much as 8-10 degrees to either side of course in calm waters.
I have tried a few things, setting from performance to cruising , also tried setting gps datum to internal gps from auto anyhow didn't make a difference.
I did notice when cleaning cabin after my trip that I had a pair of plyers laying on top of my heading sensor wire which has been there since I did install( was wondering where they went) but did not go back out to check to see if that was it .
EV-200 with pr70, a78 all updated when calibration was done I think it was 4 degrees.
25vx Hydrasport 150s no rudder reference
I did post on Rays web site but hoping by chance somebody has the same set up and can tell me something different.
Maybe this typical of APs?

Thanks for any replies
Hoejef
Old 11-18-2016, 05:12 AM
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Originally Posted by hoejef View Post
Have been noticing when underway that my AP does S turns in both auto or in route to waypoint , can be as much as 8-10 degrees to either side of course in calm waters.
I have tried a few things, setting from performance to cruising , also tried setting gps datum to internal gps from auto anyhow didn't make a difference.
I did notice when cleaning cabin after my trip that I had a pair of plyers laying on top of my heading sensor wire which has been there since I did install( was wondering where they went) but did not go back out to check to see if that was it .
EV-200 with pr70, a78 all updated when calibration was done I think it was 4 degrees.
25vx Hydrasport 150s no rudder reference
I did post on Rays web site but hoping by chance somebody has the same set up and can tell me something different.
Maybe this typical of APs?

Thanks for any replies
Hoejef
I have the same Autopilot.

Things I would check first.

1. Make sure that you do not have a loose motor wire going to the EV-200. The wires are held in by small lugs with a slotted screw.

2. Make sure all the Seatalk Cables going to and from heading sensor, control unit ect are fully seared with collars locked.

3. Make sure the heading sensor is fully seated in it's cradle and the top ring locked in place.

4. Are you 100% sure that your hydraulic steering is bleed, reservoir full and the helm(s) are working correctly. With check valves seating correctly so that the wheel (s) is not moving when the pump is operating??
Old 11-18-2016, 04:47 PM
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Thanks Mpellet
All good things to check, so does yours do s turns at all ?
Old 11-18-2016, 05:39 PM
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Originally Posted by hoejef View Post
Thanks Mpellet
All good things to check, so does yours do s turns at all ?

Well as far as constant "S" Turns, no my Evolution 200 does not do that. However it does get off track sometime and will make a noticeable turn to correct and get back on track. This happens when I get a sudden side current. En route from my marina to open ocean I cross one of the major flow areas in and out of Long Island Sound. When the tide is running its a strong flow that will pull down nuns & cans. I go from no current to major current hitting me on the beam, takes a bit for the pilot to pick this up and that would be an instance where I will get some course deviation and correction. When I am running in track mode to a fix that is a ways off, the system corrects faster then it does in heading.

A couple of things, when you engage pilot are you trim neutral?? If you have a tab down and have some asymmetrical pull on the wheel, this will make it much more difficult for the pilot to stay on course and could contribute to the "S" turning.

Before we go any further, I am NOT a marine electronics professional by any means, just a chump who installed one Evolution 200 in a s/e boat (it is the best piece of boat gear I have ever bought!) and these are my NON PROFESSIONAL OPINIONS and observations only.

There are a number of different setting that determine how aggressively the pilot tries to steer the boat. The obvious are the Leisure/Cruising/Performance settings but IMO the Fast Turn/ Slow Turn kind of boat selection does the same thing.

What I believe ALL of these settings have in common is the "Rudder Hard Over Time".

The higher the time the hard over is set to the more aggressive the pilot will be.

Using my theory, if you took 2 boats that were identical and set the hard over time in on e boat at 18 seconds and 30 seconds in the other boat , the pilot in the 30 second hard over is gonna be more aggressive.

Keeping that in mind, if you had the 30 second hard over rudder time boat set in cruising mode it might be as aggressive as the 18 second hard over rudder time boat is set in performance mode.

Big boat slow turn mode is gonna make the pilot behave more aggressively then in small boat fast turn mode. Again the same would apply with the 18 & 30 second hard over times.

MY OPINION ONLY, those different modes, all accomplish almost the same thing and that is to set how aggressive the autopilot performs.

If I was you, AFTER I made sure all the mechanical and electrical issues that I mentioned in my first post were OK and that the pilot was connected to uninterrupted 12v DC power,using adequate sized wiring,


I would re-check my rudder hard over times and then tinker with the set ups. Trying big boat slow turn in performance mode, cruising , leisure.

Small boat fast turn in the assorted modes and see if you can find a combination that hits the sweet spot and gets rid of your "S" turns.

Again in my VERY HUMBLE, non-professional, marine electronics guy opinion the critical number that impacts all of those fancy settings is the RUDDER HARD OVER TIME.

PS: If some marine electronics pro chimes in and explains how wrong I am , I would listen to him..........

Last edited by Mpellet; 11-18-2016 at 05:57 PM.
Old 11-19-2016, 03:01 AM
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I totally understand what your saying, its always great to hear other peoples takes on things and what I do with it is the responsibility of the me.
That being said you have some good trouble shooting points, some I have tried some I have not.
Will be heading out today to play around and will let you know outcome
Thank you so so much
Old 11-22-2016, 02:29 AM
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Thanks Cme
One thing I did notice the other day, when traversing in part of the channel that comes up to 3-4' it really goes into short s-turns and when channel drops back it tends to go back to a longer smoother s turn ?
Boat does track well, no pulling to port or starboard.
Heading out of town but I will definitely check compass, I know I had a constant green led and think variation was 4 Degrees
I am one version back on software 17, I see its up to 17.45
Old 04-26-2017, 02:04 AM
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Just a quick follow up, So I had both rams rebuilt due to leaky seal and slight pitting and come to find that I could barley move one of the motors. I knew steering was somewhat stiff but I didn't realize how bad it was till you take hydraulics out of the picture. S turns now gone
Thanks for all help

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