Homebuilt ROVs Forum

Wow, that is truly amazing ROVER3D. Have you gotten to try it out in the water yet?

If I'm reading the post correctly, greenkarson seems to have used freshwater during his testing. I'm really interested now to know exactly how conductive saltwater is.

Where have you heard that you can run brushless motors in salt water , KR2_Diving? All I know seems to indicate that, while it would probably work, you would have pretty severe corrosion. I don't run brushless motors, so I really don't have any first hand knowledge of this. I would be really interes...

Welcome to the forum. It looks like you have a good handle on the basics, and your control scheme looks pretty good to me at least. You may have seen this already, but here is a link to KR2_Diving's thread - he has a control system quite similar to yours. http://homebuiltrovs.com/rovforum/viewtopic....

It's really going to depend on the current your motors draw. If you have an amp meter you can measure how much current individual components of your ROV use, and add them up to get your maximum overall current draw. Then use a fuse with a bit of safety margin.

Fuses are very important. You can fuse components individually, but make sure you have a master fuse as close to the battery as possible.

ESC stands for Electronic Speed Control. It controls the speed and direction of a motor. The brushless part just means that its designed for a brushless motor. There are also brushed ESCs which are designed to work with brushed motors (for instance, bilge pumps). Brushless motors require an ESC to w...

Another option would be to get an external RC mixer, like this one:

http://www.robotlogic.com/IMX1_Users_Guide.pdf

Edit: I checked the VEX website, and it looks like this controller at least supports basic channel mixing:

http://www.vexrobotics.com/products/acc ... -2153.html

I agree with the 3/10 rating, though when I first started out it seemed way harder ;) If you have any electronics on board you ROV, try to solder as much as you can together before attaching them to anything, be it the frame, the inside of a waterproof housing, etc. as soldering in confined spaces i...

Also, the motors themselves can block some of the thrust, or at least divert it in a less desirable direction.