Re: Outrunner Underwater??
Posted: Jan 7th, 2016, 12:30 am
Check out SV Seeker on YouTube. He has an ROV link in his playlist. One of the vids is how to make a vacumm chamber. Another is sealing a motor.
Exploring the Hobby of Building your own ROV - Imagine, Create, Inspire.
https://www.homebuiltrovs.com/rovforum/
Good hit, thanks! Just what I was looking for.Ian MacKenzie wrote:Check out SV Seeker on YouTube. He has an ROV link in his playlist. One of the vids is how to make a vacumm chamber. Another is sealing a motor.
olegado, what are you using to power your test motor? I plan experimenting with several motors, my current one runs on 11.1 volts but others can run at higher voltage. I presently have a 12 volt 30 amp switching power supply that I hope I can use to run it. Are you using a power supply or batteries for your tests?olegodo wrote:Ran the motor for another 2 hours yesteday with no change. Still runs fine and no noticeable wear, friction or noise change.
The nylon will absorb moisture and swell for sure but I'm not sure how big the effect will be. So I have the motor sitting in water now to see if it there is any notable difference in friction after one day in water.
I do believe the Bluerobotics thrusters are encased in some sort of epoxy to protect the winding of the motor. I plan on doing the same, but I'm not sure exactly what epoxy to use yet.
Very cool. I bought one of those myself but have not tried it yet. Good to know about the voltage adjustment as there was no tech info sent with it. I assume it is the pot to the left of the terminal strip? I may buy a second one and run it in parallel for additional amperage output. Could run two in series for 24 volts I suppose as well?olegodo wrote:Hi,
I am using one of these cheap 12v 30A psu's from china.
Works great. I have never gone further then about 24A or so in my tests. But without problems.
I found out yesterday that it is also adjustable within a range of 10 to 16.4v.
I have never had any problems with voltage drop during testing either.
Protection circuits also work good. I have shorted it a bunch of times without it taking damage. It just turns off and stays off until you cycle the power.
olegodo, how did the Igus bearings hold up?olegodo wrote:I have some Igus composite bushings I want to test some day. I believe they are the same type as is used in the Bluerobotics thrusters.
Designed to work in submerged environments. Only problem was that the exact size I needed for my motors didn't exist so I have to file them down from 5 to 3mm if I want to use them. Both inner and outer diameter fits perfect.
If anyone wants to try them I would suggest looking at the Igus websites and sending them an email.
I got 5 of each size for free as a test I was quoted a price of $5 pr piece if I were to buy more.