I did the first pool dive with my 2.6 build, it went great. However I had the following minor problems that I need to work on:
- The motors are VERY powerful, I think using gamepads to control the ROV would be much more efficient than using the keyboard, the ROV was "jumping" when i thrust forward even on the lowest power.
- Adding weights to control buoyancy was not as simple as it seems, it's either too heavy or too light, I didn't have the correct weights. My plan is to 3D print a box to hang on the front metallic bar where i can easily add weights (i'm thinking to use small magnets, since they're heavy, easy to add/remove and they stick together)
- Adding weights caused the ROV to tilt, even though I tried (as much as I can) to center it. (check pictures)
- The vertical propeller got detached from the epoxy (the bell was still in place) as soon as I removed the thrust guard. I removed the guard because after a while, it moved and started to rub against the propeller. I think I need to find a better way to fix the cover instead of just a pressure fit.
- The depth reading was not accurate. I zeroed it at surface, however at 2m it was still reading 1.54m. At surface it was okay.
- Even when I managed to set the ROV to be -almost- neutrally buoyant, it was still tilting backwards when I thrust forward, causing it to move upwards too. When there's no thrust, it goes back to horizontal position. This might be fixed by using a lower thrust?
- I need to make the tether neutrally buoyant, I was unable to find hollow polypropylene where I live, so i'll try some of the suggestions i've seen on the forum.
- Depth hold seems to works fine. I had reverse the vertical motor for it to work properly.
- Remember to switch bells on the horizontal motors if the movement is reversed.
The overall experience was great, I learned many things. I think I will do another test before taking it to the open waters.
Thanks!67-IMG_1095.JPG (2.24 MB) 68-IMG_1085.JPG (2.33 MB) 69-IMG_1101.JPG (2.8 MB)