Russ, and others with 'wandering' wheelpilots,
I have had considerable success adjusting my Raymarine wheelpilot without a RPS to function in different sea conditions by using a set of adjustments known as "The Catalina Cocktail" and found on the Raymarine support website. I'll paste it below in it's entirety, I've never had to try step 4, changing the drive type, and you'll note that it's not generally prudent to do so.Optimal setup for the ST4000+ on a Catalina 270 Question I have a ST4000+ wheelpilot I recently installed on a Catalina 270 sailboat. At the West Coast Catalina Rendevous the Raymarine rep said that you guys have some recommended default settings that work best on Catalinas. I'm having trouble getting the autopilot to track well, even with the rudder gain at the lowest setting. The boat has a tendency to oscillate. Can you supply me these recommended setttings? Thanks. Answer This boat has a relatively low number of turns on the wheel from lock to lock. I would recommend you change the following setting from the default in this order. Please do these one at a time while evaluating performance after each change. Also, make sure that you have gone throught the compass linearization with a deviation of 10 or below.1. Change the Rudder Gain from 5 to 22. Change the Auto Trim from 3 to 23. Change the Response from 1 to 24. Change the Drive Type from 1 to 2Please avoid changing the drive type if possible. If the turns on the wheel from lock to lock are less than 2 then you might try the Rudder Gain at 1.