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Old 14-01-2020, 13:09   #1
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DIY autopilot OpenCPN

Hey guys,

I was looking at that PyPilot (https://pypilot.org) for OpenCPN.

I want to swap my raymarine wheel mounted heading only autopilot AP for something that’ll play better with the opencpn system, allow me to take advantage of all the autopilot control modes of opencpn and also be more trust worthy to help me take a better single handed nap

What hardware am I looking at to get something installed under deck, any tips or suggestions would be very welcomed




Thanks!
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Old 15-01-2020, 20:57   #2
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Re: DIY autopilot OpenCPN

So basically something like this layout from my Edison




Using maybe a raymarine like this



https://rm.factoryoutletstore.com/de...ogitemid=37849


Or one of these



https://www.pyiinc.com/jefa-autopilo...ketdrives.html



And using the PyPilot controllers and OpenCPN?
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Old 17-01-2020, 09:49   #3
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Re: DIY autopilot OpenCPN

Can’t you just feed nmea 183 data from pc to existing ray pilot?
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Old 17-01-2020, 10:10   #4
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Re: DIY autopilot OpenCPN

Agreed why not just drive the Ray pilot? I have an old functional Comnav AP with the chain drive under the deck. If/when that motor goes sour it's $1550 for a new motor (plus bracket work) vs $1900 for a complete CPT system on the wheel (I'll choose the latter). It's my understanding that with a little head scratching either can work with PyPilot...

Perhaps you want to de-clutter the cockpit or improve aesthetics, but I'd at least offer moral support for keeping everything on the wheel.
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Old 17-01-2020, 19:29   #5
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Re: DIY autopilot OpenCPN

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Originally Posted by Singularity View Post
Agreed why not just drive the Ray pilot? I have an old functional Comnav AP with the chain drive under the deck. If/when that motor goes sour it's $1550 for a new motor (plus bracket work) vs $1900 for a complete CPT system on the wheel (I'll choose the latter). It's my understanding that with a little head scratching either can work with PyPilot...

Perhaps you want to de-clutter the cockpit or improve aesthetics, but I'd at least offer moral support for keeping everything on the wheel.
Is the wheel system anywhere near as robust or precise though?

Just thinking if Iím single handing it for a few days, would I get much more reliability with wheel vs below deck?
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Old 18-01-2020, 08:01   #6
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Re: DIY autopilot OpenCPN

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Originally Posted by NorthernMac View Post
Is the wheel system anywhere near as robust or precise though?

Just thinking if Iím single handing it for a few days, would I get much more reliability with wheel vs below deck?
I only have user experience with my own autopilot. I've tried to keep tabs on newer autopilot systems given the antiquity of my own (either to buy a backup or replacement).

Several threads on the CPT, here's one thread discussing pros/cons that seems to be proportionately representative of deeper investigation on the CPT:
http://www.cruisersforum.com/forums/...ot-210760.html
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Old 23-01-2020, 04:41   #7
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Re: DIY autopilot OpenCPN

So in this video of the Pypilot with wheel steering, he (Sean) is saying the Pypilot makes a better course than CPT.

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Old 23-01-2020, 06:15   #8
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Re: DIY autopilot OpenCPN

If your looking for increased reliability and redundancy, put a hydraulic or electric ram on the quadrant.

Either can be driven by the Pypilot with the appropriate motor controller.
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Old 23-01-2020, 07:47   #9
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Re: DIY autopilot OpenCPN

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Originally Posted by kenbo View Post
If your looking for increased reliability and redundancy, put a hydraulic or electric ram on the quadrant.

Either can be driven by the Pypilot with the appropriate motor controller.

Pypilot has a separate heavy duty controller for below deck installations as you describe. We have one and works well w/our fairly large hydraulic pump. While we don't have any direct comparison for an electric drive on our boat, the hydraulic pump is very quiet and seems to be energy efficient as compared to other boats we have helped deliver w/large electric drive motors (below deck).


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