Linear actuator to change diving plane angles

Hi, for a submarine project we have to use a linear actuator (the only motor we have that is strong enough) to change the angle of the diving planes while the device is submerged. I can't tell which option would be the best to convert the linear motion into that rotary motion of the planes. Should I use rack and pinion? or is there some way to give favor torque over speed when transforming the movement? Thanks!

How much angular movement on the plane? Do you have room to swing a crank?

Or something like this, depending on required torque, (you didn't say).
https://www.amazon.com/MagiDeal-Torque-Turbine-Electric-Reduction/dp/B0773XWW5K/ref=sr_1_32?ie=UTF8&qid=1538174803&sr=8-32&keywords=worm+drive+motor

to change the angle of the diving planes while the device is submerged

Consider using this gorilla worm drive gear motor. 8.5 Nm torque can crank just about anything.

outsider:
How much angular movement on the plane? Do you have room to swing a crank?

We dont know the angle span exactly yet, but lets say around 90°. Not a lot of room though. The inside of our device is 3 inch and like 1 foot long. The interesting thing with our linear actuator is that you can write directly to it with an arduino, the speed control in integrated like a servo, which makes it really easy. Its a 12v actuator and im just looking for an efficient way to make the linear movements of that actuator rotate the diving planes

JCSB:
We dont know the angle span exactly yet, but lets say around 90°. Not a lot of room though. The inside of our device is 3 inch and like 1 foot long. The interesting thing with our linear actuator is that you can write directly to it with an arduino, the speed control in integrated like a servo, which makes it really easy. Its a 12v actuator and im just looking for an efficient way to make the linear movements of that actuator rotate the diving planes

Then it's a mechanical problem, not an Arduino question, correct?

Paul

Paul_KD7HB:
Then it's a mechanical problem, not an Arduino question, correct?

Yes! Well Im looking for advice on mechanical aspects of the project in the mechanics forum.

JCSB:
Hi, for a submarine project we have to use a linear actuator (the only motor we have that is strong enough) to change the angle of the diving planes while the device is submerged. I can't tell which option would be the best to convert the linear motion into that rotary motion of the planes. Should I use rack and pinion? or is there some way to give favor torque over speed when transforming the movement? Thanks!

I don't understand your logic. You don't have any rotary motor with enough torque, so you
choose a device which doesn't generate torque instead?

You surely just need reduction gearing to trade speed for torque?

The logic seems to be: "We have this linear actuator, and that is what we will be using, regardless of its unsuitability for the task".

Have you tried fitting a crank?

jremington:
The logic seems to be: "We have this linear actuator, and that is what we will be using, regardless of its unsuitability for the task".

Thanks for your passive aggressivity haha! The think is we tried with a normal motor before but it didnt work. The cool thing about this linear actuayor is that it comes from a device made for underwater work so it can move underwater no matter the circumstances.

"a normal motor" - meaning what? There are many tens of thousands different motors, with different gearing, torque, power, speed - they are all normal, not all will work for a given application. You need
to at least find out what torque and speed you need for the task and report back...

Sometimes I wonder why we are even having this discussion.

Paul

I suppose the obvious question is how big is the submarine ?

Have you googled model submarines ? Most seem to use conventional RC servos - the forces are no more than that on a model boat rudder .

I hope it is a model ...

Ok I didn't mention something. It's actually not a submarine, but an underwater camera (shaped like a submarine) and its actually being towed by a boat. Therefore it will go at a decent speed. It's 3'' large, and 10'' long, and we want to use this product https://www.bluerobotics.com/store/rov/bluerov2/newton-gripper-asm-r1-rp/ and turn it into a simple linear actuator, and transform its linear movement into rotary movement to move the planes angles, so the camera can change its depth while being towed.

So I see you guys are pretty much in favor of going for a rotary actuator instead, but we already have this gripper and its really strong, reliable and reusable, and mostly easy to use because we can only use the servo library without any additional hardware.

The only I need is to see what would be an easy way to turn that linear energy into rotary. Thanks!

Well Im looking for advice on mechanical aspects of the project in the mechanics forum.

Do keep us informed!

There is ONLY one way. A crank, which is a lever in disguise.

Paul