Moki ROV (Another DUTCH ROV)

[olegodo]

Thanks again. More to come pretty soon

[Moki]

Just keep them coming, ill be ready

Btw: just orded "Taulman 618 nylon filement". Should be stronger and above all, NO SMELL.
PLA printing smells... Like... Not sure(words that come to mind, are NSFW) But ill have the taste in my mouth for the next week, for sure.

[a_shorething]

Aren't the nylon fumes really bad for you?


PLA does smell bad, but it's biodegradable and safe. The other stuff is all plastic and needs ventilation.

I just started using ABS instead of PLA and the prints are MUCH better, but the fumes are just as strong and from what I've read, not as safe.

[Moki]

From:

http://www.taulman3d.com/618-features.html

You may have heard nylon emits fumes. 618 does not emit any fumes for printing. Actually, there is no odor at all from 618. You may see what looks like puffs of smoke, but it is actually water vapor or steam. If you are interested in seeing a full report on extruding Nylon based materials, please check this link as it's an extensive report used by all of industry.

It may ofcourse all be markting-talk. Until proven wrong, ill believe it.

[Moki]

As i am still waiting for the Ebay stuff to arrive for my ROV-V1.
I did some work on the ROV-V2:

(Had to fix a few things, as i got the 28-30 motors, not the 28-36 )

[a_shorething]

SWEET!

Question: Have you tested the threaded endcaps on that main vessel? What depth/pressure do you anticipate going to with this configuration?

[Moki]

My goal is simple... Max 10 meters, normal operation depth 3 meters

[a_shorething]

Ah, not much in the way of pressure. I've read that some people had issues with leaking when using threaded caps. Hopefully that won't be an issue here.

[Moki]

Ah, not much in the way of pressure. I've read that some people had issues with leaking when using threaded caps. Hopefully that won't be an issue here.

Have done some tests... and indeed... its not Always waterproof. But nothing a little epoxy wont fix.

[a_shorething]

You might try something that I've seen on here from someone else that I'm also using: It's called a Cherne key (manufacturere is Cherne I think, in this area) it's just a plug that's typically used for plugging PVC pipe during the pressure test. They come with a wingnut to tighten them and have a WIDE rubber piece that gets forced out against the walls as you tighten it.

In my implementation I removed the wingnut, replaced it with a regular nut and put a printed dome shaped end on there to make it look better and be hydrodynamic (and less likely to catch on stuff). Once I determine whether it works I plan to install it with a torque wrench so that I know it's tight enough each time.

I'll post a pic of one later on if you're interested. They're designed specifically for that (albeit with sched. 40 pvc pipe) and it's quickly and easily removed.

Edit: sorry for the minor hijack. I just posted my design mod for these in my bot cousteau thread, check it out and let me know what you think.