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Building my own acrylic full ATX cube case - Page 4

post #31 of 66
Here's my Ghetto engineering approach:

First find two like pieces of plywood, particle board, heck even sheetrock if your desperate and cut the size "circle" you desire into both boards in the exact same spots. Next sandwich the acrylic(plexiglas is a trademark name of Polymethyl methacrylate (PMMA)) inbetween the two boards and line up the previously cut guide holes. Then clamp the monstrosity together by any means necessary and/or available. That should help to eliminate vibration, and provide a boundary to keep you within the dimensions (thats my theory anyway). Next your going to have to start cutting with the hacksaw blade from the center outward towards the guide boundary... Thats where it gets tricky though because your going to need an opening to get the hacksaw blade through. You could try using a hole saw (I'll link a picture if I can find one), you could also simply us a large size bit, or perhaps if your crazy and the hole/circle you wish to create is rather large you also melt away the acrylic with a heat gun. If you use the drill aproach make sure you have the acrylic lying flat against a cutting board to prevent flexing as you apply pressure; so drill the starter hole before you clamp it in place.

Links:

1) Modifying a drill bit for acrylic
http://www.hawkfish.org/snailman/acrdrill.htm

2) Hole saw courtesy of wiki
http://en.wikipedia.org/wiki/Hole_saw


Awww Syrillian you beat me to the hole saw suggestion...
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post #32 of 66
Thread Starter 
can i drill along the edges of the circle while the plexi is clamped with the two woods with the hole? then while its clamped push the cut circle out?
    
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post #33 of 66
Quote:
Originally Posted by amd_hardsoftware View Post
can i drill along the edges of the circle while the plexi is clamped with the two woods with the hole? then while its clamped push the cut circle out?
Its possible I guess, but not pratical, infact that would probably be more time consuming than any of the suggestions I made earlier.

Honestly though (don't take this the wrong way I mean no disrespect) if you want to do a project the right way you need the coresponding tools and level of expertise required to complete said project. 90% of the time you won't be pleased with the results if you "ghetto engineer" a project. I would really suggest you look into getting a cheap spiral saw, you could probably get one used for ~30 usd. Bosch makes some nice tools heres a link...

http://bosch.cpotools.com/rotozip_sa...ooglerz10-2100

Spiral saws have relatively moderate to low learning curves and are a lot of fun to play with.
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post #34 of 66
Well said MasterKromm...

If you buy a Dremel you will have all the tools you need. It is not optimal, but with the varied attachments, bits, sanding/polishing, and general cutting implements you can do it all.

Take a look through this list. You don't need to pay a premium price for one of them. If you decide what you want you could get one on ebay, or at a Home Depot-type store. I got mine for US$ 24.99, but I could not find it at their website...sorry no pic.

As for the Rotary Tool itself, it doesn't need to be a "Dremel". Check a local pawn shop, see if you can get one used.
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post #35 of 66
Quote:
Originally Posted by amd_hardsoftware View Post
how do i make screw holes?
also how do i seal the joints?
and lastly, how would i make the acrylic mobo tray with risers?
use an acrylic drill bit, low speed... go slow...

Use acrylic glue... THIS IS NOT SUPERGLUE! THIS IS NOT ACETONE AND ACRYLIC DUST! -- If you used real acrylic adhesive your joins will be almost as strong as solid acrylic... and perfectly clear

cut yourself some little blocks... fire polish them... drill them 3/4s of the way down... and glue them to your clear motherboard plate... and use plastic case screws to secure the mobo
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post #36 of 66
Quote:
Originally Posted by amd_hardsoftware View Post
also, how do i cut fan holes (or for that matter, any circles, within the plexi without cracking it? do i need better materials?
acrylic holesaw... on a STEADY surface... go slow...
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post #37 of 66
Quote:
Originally Posted by amd_hardsoftware View Post
would scoring the plexi with a circle cookie cutter to get an imprint then follow the imprint with the plexi knife and push out, would that make a fan hole (or circular hole) in the plexi WITHOUT cracking it if i was careful??

it'll take you a while... and will be VERY easy to screw up
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post #38 of 66
Quote:
Originally Posted by Teh Evil Cupcake View Post
For sealing it, try silicone. And for screw holes, make dents first. As for cutting it, just put your dremel/jigsaw at a low speed and you should be fine.
Silicone is not what you want to use to glue pieces of acrylic together... and even on low... a dremel will burn/melt more then it cuts...

if you use acrylic adhesive, you will have a joint that is stronger then if you used 10#s of silicone... and perfectly clear
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post #39 of 66
Too mount the mobo , screw the risers into the screw through the mobo , then flip it and sit the plexiglass on top of it and mark the glass with a sharpie so you can drill the holes. You may want to glue peices of plexiglass to make a double riser so you have some room to run cables behind it , it'd prob also strengthen the case.
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post #40 of 66
Check This Thread for a method of mounting motherboards to Acrylic or Plastic.

Post #7 shows a the standoffs, Post #15 shows a test-mobo mounted.

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