Servers by jDrones

Arduboat with 3.5m boat and yamaha 6hp engine

(Canterobb) #1

Hello, after a long time of reading many topics in this forum I have dared to create a new topic.

I decided to build a boat with a gasoline engine after seeing this

although in my design, I made some modifications to be able to use my boat in waters with a bit of waves.

I built the boat with a length of 3.5 meters, and I used a yamaha 6hp engine that I already had.

the electronics so far is very simple, a pixhawk 2.1 with ardurover 3.5, a pair of radio rfd900, a taranis x9d and a pair of bec.

The accelerator is in charge of a servo savox of high torque and waterprof.

I have done tests in the sea in 2 occasions with the control in manual form, the first time it did not work very well, because for steering control I used a servo that although it had a lot of force was very slow.

8 "Stroke: 115 lb Thrust Linear Servo

This servo did not protect it well and finally it was damaged by salt water.

then I asked for another servo similar, a little faster and with a little less push

8 "Stroke: 25 lb Thrust Linear Servo

also perfect the place where the servo is located so that no water enters and install a teleflex to transmit the thrust of the servo to the motor.

on this occasion the boat worked very well manually, I had complete control of the movements, this was very nice.

although in an automatic way it did not work very well, it was normal to adjust the autopilot, so I took the boat out of the water and returned happily to my house with the intention of the next day to continue the tests, but made the mistake of leaving the boat on .

the next day the battery was dead, and as I had left the boat turned on so long were the logs of the previous day and the worst thing is that my steering servo did not work, I started the engine and the battery quickly took charge, but the servo just as fast moves of push and pull, it moved only less than 1cm, wrote to servocity because I suspect that the driver was unconfigured.

I have dared to create this thread because I hope to receive help from the community, someone knows if it is possible to reconfigure this servo.

or is it better to buy a new one? (They are not very cheap) and I think they are very delicate.

It will be that I can find a servo ready to use, more robust.

will it be better to make a customized servo?

the reliability of all the components is important since it is a big boat, and although I use it on a very lonely beach, I would not like to lose my boat.

thanks for your help.

(rmackay9) #2

OK, sounds like a better servo is the best choice. I think there are very powerful servos on the market so if it were me I would just buy one rather than trying to make a custom servo. I don’t think many commercial servos can be configured except for very expensive ones like those from Robotis.

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(Canterobb) #3

hello, I am very happy to have an answer, thanks for the suggestion, I have communicated with the servocity team and they tell me that my case is very strange and that this type of servo is very reliable, so I am going to risk it and I will buy new the same 8 "Stroke: 25 lbs. Thrust Linear Servo, since before it worked well and there is already a job done in the boat I developed a system that adapts very well to teleflex.

(Kenny Trussell) #4

Just a small suggestion: if you connect the servo directly to a channel on the RC receiver, does it behave the same way? Trying this will rule out any possibility of the problem being some kind of configuration issue or other problem in the pixhawk.

(Canterobb) #5

thanks for the suggestion, but unfortunately this already tried, even probe with a servo tester but it does not work, I opened the servo and I realized that control card heats up a lot, I also realized that it has a USB port and that if I connect it to the PC and recognize it as a serial port.

I accept more servo suggestions that I can use, they should be strong enough to be able to easily move a Yamaha outboard motor of 6hp and if it is waterproof better.


(Kenny Trussell) #6

My friend Dave, @metalsman, is using these on a lawn mower: They seem pretty massive but expensive.

(John Easton) #7

I use a wiper motor, but will be changing over to a stepper motor someday soon.

Any more photos of the boat?

Sounds like a very exciting project.

(Canterobb) #8

thanks for the suggestion, I was very interesting and the value is similar to the servocity servo linear I currently use, just yesterday I asked for one equal to the one that hurt me, since as I have dedicated time and money making adaptations for this to work servo, I am forced to continue using it, I hope this time it does not fail.

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(Canterobb) #9

hello john makes me very happy that you are interested in this thread, this project started thanks to you, I will gladly upload photos later


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