Clam wrote:We are attempting to build a underwater ROV for our robotics tech. class. we have no idea where to start. any offerings of gratitude?
What I'm not sure of at this point is how you will drive the Z axis. Subs pump water in and out to rise and fall. You are going to find that to be difficult.
I remember when my dad painted a couple of ROV's (long time ago), what they did was made the body out of Styrofoam, which everyone knows, floats quite well, the weight of everything else would counter this to some extent. they had to balance the weight with the amount of Styrofoam used in order to achieve a Neutral buoyancy
they called it. then it would float at whatever depth the ROV happened to sit. when placed in the water, the ROV would sit just below the surface.
I know that the most difficult part of the ROV was the umbilical cord, it had to be one that would float, a normal cable would just drag the thing down, This cable is fairly expensive but may be required depending on the depth required.
I don't know if this helps or not but it's a cheaper and easier way then trying to figure out how to pump water in and out of tanks.