Reid's 120g Oceanic Tech Build

I just scraped my first edge on a piece of scrap with a razor blade. When I run my finger across it, I can feel very tiny inconsistencies, perhaps from not putting the exact same pressure on every part of every pass. You can't really tell by eyeballing it, but you can feel therm. Is that a problem? Maybe I sound like I am worrying too much, but acrylic is expensive, and I can't afford to screw this up. Needs to be water tight the first time.
 
<a href=showthread.php?s=&postid=14985462#post14985462 target=_blank>Originally posted</a> by reidcrandall
Were you able to hang the sundial from the ceiling? That's what I am going to need to do, because the tank is an odd dimension.

I did not hang the fixture from the ceiling, and I dont know if Current even sells a hanging kit. I bet it would be pretty easy to fabricate one, though.
 
Well, we got the frag tank put together today. We diecided to work on it first, because it wouldn't be a complete disaster if we screwed it up :D

Used a few familiar tools...

Weld On 4 and a needle tip applicator:
weldon.jpg


needle.jpg

Both ordered from tapplastics.com. They have resumed shipping Weld On 4!

The baster that transferred the Weld On to the needle tip applicator bottle:
baster.jpg

I'm melllllting! I couldn't find a glass one very conveniently, so I decided to spend $1.49 on one that I will end up throwing away.

We solved th scraping issue by getting a router table. We routed off about 1/32" on each side, and then ran some 220 grit sandpaper over the eges using a block of wood. Worked pretty well. Much better than the razor.
routertable.jpg


And of course, the squares:
squares.jpg
 
When we set up each side, we used the squares taped to the piece of acrylic laying horizontally:
squaresetup.jpg


We used the pins method. I used standard sewing pins, but I also like the idea of using guitar strings. These pins may have been a little bit too big, because the Weld On would really squirt in there if I wasn't careful.
gluing.jpg


We used the square setup, gluing both sides to the back panel. We held them in place for about 5 minutes, and then let them stang for another 15-20 minutes. We then placed the front panel on the table, and glues the sides to it. Here's a pic of the tank before we put the top and bottom on:
box.jpg


Finally, we glues the top and bottom on. It took me, my dad, my mom and my wife to hold all of the corners in place, and to pull the pins. There is probably a better way, but we got the job done nonetheless. Now, the finished box is sitting with bricks adding some weight to cure for about 48 hours:
box2.jpg


Everything worked out pretty well. There are a few bubbles in each of the seams, but not enough to cause problems I hope. I suppose we will find out when we do a water test on Tuesday after we route the top to create the euro brace.

What is the secret to perfect, bubble free seams?
 
Reid, is there a hole in that project anywhere? If not, the solvent will create a vacuum which can pull all six walls inward, and thus pull on the seams you are trying to cure. A vent hole is important.

Scraping works, routing it off is even better. The trick is being consistent with all sides of the project, so that they can all align correctly.

Bubble-free seams? I'm still working on that one. :lol:
 
<a href=showthread.php?s=&postid=14989064#post14989064 target=_blank>Originally posted</a> by melev
Reid, is there a hole in that project anywhere? If not, the solvent will create a vacuum which can pull all six walls inward, and thus pull on the seams you are trying to cure. A vent hole is important.

Scraping works, routing it off is even better. The trick is being consistent with all sides of the project, so that they can all align correctly.

Bubble-free seams? I'm still working on that one. :lol:

Yep. We drilled the port hole in the top panel! We should be set there.

How many bubbles is too many bubbles?
 
If you have larger bubbles, that's a problem. A few tiny ones aren't something to worry about. If you have a 1/4" wide piece with a bubble that is 50% of that width, that's something to look into. You can always glue a small scrap of acrylic next to that spot to beef it up some, increasing the thickness in that area.
 
<a href=showthread.php?s=&postid=14991398#post14991398 target=_blank>Originally posted</a> by melev
If you have larger bubbles, that's a problem. A few tiny ones aren't something to worry about. If you have a 1/4" wide piece with a bubble that is 50% of that width, that's something to look into. You can always glue a small scrap of acrylic next to that spot to beef it up some, increasing the thickness in that area.

I don't think I have any nearly that big, but I will inspect and maybe use a scrap to reinforce if I have to. I knew I should have ordered some Weld On 16 when I got the 4. Oh well. I think I will be fine, especially on something this small with a bottom and a euro brace.
 
If you find it early enough you can always stick the needle into the bubble and insert more weld one. I was able to do this last time i helped a friend with a sump.

Also i find that using small syrings or actual hospital needles work teh best easier to keep it consistant as you go across the seam. Just some tips for next time lol. looks good buddy!
 
I completely agree. I love it. It's great to have a few people going through the same things at the same time. I think it helps us all figure out the situation a little bit better.
 
<a href=showthread.php?s=&postid=14994079#post14994079 target=_blank>Originally posted</a> by Padrino
by the way i love how all of us are on each others build threads the same crowds!

Its definitely been helpful to say the least.
 
Water Test

Water Test

The frag tank survived the water test. Everything sat there completely full for a few hours with no sign or leakage or distress!
watertest.jpg


I'm so happy with it. Now to start my RBTA mill... hahahahaha!

I can't wait to get the sump done!
 
looks great reid.. when are you inviting me over. If you are ever in ontariolet me know you should come see the operation i have going overe here. lol Looks great buddy!
 
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