[chbot] Building a Sea Pearch ROV

[kerry at manukadesign.co.nz]

Quoting Mark Beckett <m.beckett at amuri.net>:

> Looks like a great idea.
> Hadn't thought of sealing a motor in wax.
>
> Do you have access to Cat 5 patch cable (its more flexible than  
> ordinary single strand)?
> I'm picking a couple of 20m lengths should be enough.
>
>
> Mark
>

Yeah using wax just seems too simple. I would be interested in finding  
out what sort of depth you could get these down to before you get  
water leakage. In older designs they used a layer of vaseline at the  
shaft end of the motor then an epoxy to seal the rest.

I work for Molten Media so lengths of patch cable are no problem. Yeah  
I was assuming two cables the first one for controlling the 3 motors  
and the other plus the two extra strands from the first for any other  
things like cameras, light, etc.

What got me onto this project in the first place was talking with Mark  
Atherton about building an electric fishing torpedo - like this:  
http://fishingtorpedo.co.nz/company.html without spending the better  
part of $1200 to $1400, and I was having some trouble getting my head  
around sealing the prop, he lent me a book on diy rov's which included  
the Sea Pearch which seemed like a great testbed for larger rov's or a  
fishing torpedo.

Kerry