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Unread 29-01-2014, 18:27
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What to use as a electronics board.

I am a part of a rookie team and we are trying to decide on what to use to mount our electronics. We have very little machining resources but may be able to call in our one favor of the year to get a neighbor team to make this for us. We are using a VersaChassis with 3 CIM ball shifters on it. I have attached a drawing of what the board has to look like to not get in the way of the belts or the shifter 3rd stage.

We were thinking of using a couple different things. One way a sheet of aluminum then polycarbonate on top to prevent short circuits. We also thought of wood then polycarbonate, just polycarbonate or the polycarbonate with holes in it that andymark sells. We were then going to use industrial strength Velcro to attach most of the components.

Are there any suggestions of what worked for your team in the past or what was easiest.

Thanks
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Last edited by Maximillian : 29-01-2014 at 19:13.
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Unread 29-01-2014, 18:29
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Re: What to use as a electronics board.

I would just cut this out of a 1/8th inch sheet of polycarbonate with my 10 dollar Jigsaw. No AL or wood.
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Unread 29-01-2014, 18:34
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Re: What to use as a electronics board.

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Originally Posted by kevin.li.rit View Post
I would just cut this out of a 1/8th inch sheet of polycarbonate with my 10 dollar Jigsaw. No AL or wood.
Where would you get it from? If you get it on McMaster-Carr then which version would you get? The impact resistant or the ultra-impact resistant?

http://www.mcmaster.com/#polycarbonate-sheets/=qgtocq
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Unread 29-01-2014, 19:09
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Re: What to use as a electronics board.

We just purchased two rectangular pieces and used the flanges to mount the boards. Clamped them down and match drilled some mounting holes.
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Unread 29-01-2014, 19:18
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Re: What to use as a electronics board.

Traditionally we have used 1/4" birch plywood for an electronics board, doubt we will change up the final one this year but who knows.
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Unread 29-01-2014, 20:32
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Re: What to use as a electronics board.

We use 3/16" ABS as it's more rigid than polycarbonate. We've also used 3/16" expanded foam PVC. That's not a indestructible but it's a tiny bit lighter.
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Unread 29-01-2014, 21:10
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Re: What to use as a electronics board.

I've used aluminum, I've used lexan, I've used wood. Unless you're in weight trouble or have other considerations, use what you can fabricate. You can get nice looking results from a decent piece of wood (birch or similar) and a coat of paint.
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Unread 29-01-2014, 21:11
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Re: What to use as a electronics board.

Start with wood. the cRIO grounds, so wood will help get that out of the equation. It is also very strong!
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Unread 29-01-2014, 21:24
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Re: What to use as a electronics board.

To echo above, run whatever you can get made the quickest, cheapest, and nicest. I'm guessing that any machining resources you could ask from other teams are better spent improving your manipulator than on your electronics board.

My team uses perfboard, which is really easy to cut and makes mounting really nice and easy. We're using 1/4" this year, but 1/8" is fine for most applications.

Just use a jigsaw or cut it by hand. Pretty belly pans are nice, but in this case, good doesn't always need to equal pretty.
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Unread 29-01-2014, 21:31
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Re: What to use as a electronics board.

Wood will get you the most strength to weight ratio. 3/8" or 1/4" plywood works pretty well for everything. You can attach components with wood screws since velcro tends to shift and get messy. What ever you decide on doing, wire extremely neatly. It will be worth the time you spend when you have to do trouble shooting or adding/removing/replacing components
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Unread 29-01-2014, 22:02
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Re: What to use as a electronics board.

Quote:
Originally Posted by theawesome1730 View Post
Wood will get you the most strength to weight ratio. 3/8" or 1/4" plywood works pretty well for everything. You can attach components with wood screws since velcro tends to shift and get messy. What ever you decide on doing, wire extremely neatly. It will be worth the time you spend when you have to do trouble shooting or adding/removing/replacing components

So what do you think about Velcro? Is it an okay thing to use for parts like motor controllers? Or would use just use screws and bolts for everything?
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Unread 29-01-2014, 22:07
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Re: What to use as a electronics board.

VELCRO IS AMAZING. We had very few problems with velcro last year(read: it fixed some problems). It allows you to easily move a component while you are trying to debug it!
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Unread 29-01-2014, 22:09
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Re: What to use as a electronics board.

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Originally Posted by Maximillian View Post
So what do you think about Velcro? Is it an okay thing to use for parts like motor controllers? Or would use just use screws and bolts for everything?
It can be done, just make sure it adheres well. You'll probably have more issues with wood there, but using a staple gun may help you out on the board side. Don't be stingy with the stuff; the weight penalty is minimal, but the how'd-that-break-free? penalty is often not minimal.
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Unread 29-01-2014, 22:20
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Re: What to use as a electronics board.

We cover our ABS control board with 4" wide Velcro loops. That way we can move components around at will and change broken components easily. A good source is

http://www.uline.com/BL_6426/Hook-and-Loop-Tape
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Unread 29-01-2014, 22:29
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Re: What to use as a electronics board.

Maximillian,

Velcro would be fine like others have said, my reasoning for suggesting screws is that velcro does not rigidly connect the component to the board. If you have tight wiring runs, the controllers often like to rotate on the velcro. Wood screws are rigid and alleviates that problem. You may try out both and see how each works and which you like better. I cannot stress enough how what ever you do, keep it neat and tidy. A rats nest looks unprofessional and leads to issues
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