Cummins Marine Diesel Repower Specialists › Forums › General Discussion › Jog Steering
- This topic has 10 replies, 4 voices, and was last updated 5 years ago by john.
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October 26, 2018 at 5:48 pm #38950
Fireisland1ParticipantVessel Name: Riverwind
Engines: cummins QSB 380
Location: long island n.y.
Country: usa
I finally got around to installing jog steering in my Downeaster. I used an Octopus variable piston pump, a reversing relay and 2 HD soft switches.
The pump output is adjustable. I have it set for 11 seconds full sweep. Seems to work as planned. -
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October 29, 2018 at 6:09 am #39081
johnParticipantThanks Rob. Iām a pretty good inventor. The only problem is most of my inventions already exist. I should get out more.
Yes itās tough when you have to compete with a nice lever like Tony put up. All in one. Itās alway nice to have the ability to make your own and watch it work.
Another question for tony. Why the two pumps with the accusteer pump setup?
October 28, 2018 at 4:48 pm #39052
Fireisland1ParticipantVessel Name: Riverwind
Engines: cummins QSB 380
Location: long island n.y.
Country: usa
I did not use any autopilot. The rudder feedback is brought back to the helm via a push pull 27ā aircraft cable. It is very precise and never needs any adjustment. At the end of the cable under the helm is a quardrent. It is on the back of the rudder indicator in the photo. There are 3 micro switches p- 0 – s . The indicator sweeps past them. The control switches work with a soft touch or hard touch. Soft give you any degree you want . Hard gives you full over. 0 switch is not installed yet. I have not perfected the failproof circuit yet,
October 28, 2018 at 3:24 pm #39040
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
October 28, 2018 at 9:48 am #39034
johnParticipantSo what did you use to control the pump? No auto pilot? I’ve was involved in a new construction fred whal crabber and they just used com nav jog levers and nmea 2000 network to control it through the auto pilot computor.
October 28, 2018 at 5:52 am #39019
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
One we put together for a small tug boat last year.. Had bout a 40 Cu-inch ram.
Tony
October 27, 2018 at 4:28 pm #38993
Fireisland1ParticipantVessel Name: Riverwind
Engines: cummins QSB 380
Location: long island n.y.
Country: usa
Thanks Rob. Iām a pretty good inventor. The only problem is most of my inventions already exist. I should get out more.
October 27, 2018 at 3:56 pm #38991
Rob SchepisForum ModeratorVessel Name: Tenacious
Engines: 6BTA 5.9 330's - "Seaboard Style"
Location: Long Island, NY
Country: USA
Over the winter I will be adding auto 0 deg. Iām building the logic box now but it is not 100% reliable yet.
At that point you’ve basically built your own auto pilot including a dodge feature. Nice project, one that requires many hats —- a thinker, a craftsman, a plumber, an electrician, etc..
October 27, 2018 at 3:11 pm #38988
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
Sounds to me you got it 100% under control..
Not only clever, you did a great job!.
Tony
October 27, 2018 at 2:18 pm #38987
Fireisland1ParticipantVessel Name: Riverwind
Engines: cummins QSB 380
Location: long island n.y.
Country: usa
Tony, I did the math by first timing how fast my 6 turn helm took for full swing. That was about 8 seconds without bypassing. I then measured my cylinder and started a pump search. 1.2 cu/in gear pump was too slow. 3.5 would do the trick but might have been too fast. Octopus 1.2 L/min seemed about right and it is adjustable down to .6 L/min. On full output that got me to 7 sec. full swing. That worked out great for docking especially since I do not have a stern thruster. I often will go hard over a few times when lining up for a stern berth. The 7 sec. swing was just to sensitive for jogging boats and pots while underway, so I slowed down the flow . I had to compromise a bit. Luckily the Octopus pump allowed me to do this. Video was of full output before seatrial. The pump is mounted under the swing out helm. You canāt hear it over the main at cruise. Docking you can hear it go into bypass at the stops. Max pressure is 500 psi. So nothing can get hurt. Over the winter I will be adding auto 0 deg. Iām building the logic box now but it is not 100% reliable yet.
October 27, 2018 at 10:16 am #38974
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
Very cool install………………..I was not aware that version of the OCTOPUS pump was variable disp ?? Also, I counted about 4-5 seconds L~:L which seems right to me.. 11 sec for jog steering would be really slow.
Curious, if could not hear the pump load, how would you know when it hits the hydraulic stops?
Tony
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