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Some Minor Progress…

Just a minor progress update. I’ve been adjusting the CAD design and working on some additional parts. A snapshot below….

AUV design snapshot, January 2017. Cutouts for the imaging sonars are visible. These will probably change…

I also finished grooving the prototype bulkhead ring. It wasn’t super easy, and I’ll need to experiment with feeds and speed some more to get nicer cuts. I’ve also had a plastic order come in, so I’ve done a test fit of the bulkhead into an extra piece of acrylic tube. It’s a tight,  but good fit! I just need to machine the remaining bulkheads and anodize them before I start pressure testing.

Test fitting a bulkhead into an acrylic tube.

I’ve also been working away on the nosecone plug — Adding layers, then machining it down to get it smooth — Once it’s in the right shape, I’ll manually sand it smooth and start the process of sealing with epoxy. This is a pretty messy operation, as the spackle turns to dust, so I typically do the machining with the vacuum hose right beside to suck it all up.

In the photo below, you’ll also notice the standoff I made to mount the toolposts higher in order to machine large diameter parts — Here I’ve got two spacers mounted to get over 6″ swing over the bed with the Sherline lathe. Since it’s a very soft material, I think it’s okay, but this would be quite non-ideal for machining anything harder. (To do the outside of the bulkhead rings, I just mount a single spacer and use the smaller toolpost. Still not as rigid as I’d like, but it’ll do for this small job. I do wish I had room for a bigger machine, though…)

Turning the nosecone plug. The toolpost is mounted on a special standoff I made to turn large diameter parts.

2 Comments

  1. Kevin Klemens
    Kevin Klemens April 13, 2017

    Just came across this project, looking great! I’ll be interested to see where you go with it.

    • Roger
      Roger May 3, 2017

      Thanks Kevin!

      Progress won’t always be as fast as I want it to be (I’ve been sidetracked with work lately), but I’m picking away here and there.

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