Ammunition & Hand Loading > Cartridge and Shotshell reloading
Copper Plating
unfy:
--- Quote from: skydve76 on February 14, 2013, 06:45:28 PM ---I hear that construction sites are a good place to get copper, as well as AC units.
--- End quote ---
Har har ... not a meth head.
Speaking of copper....
The roll of flashing I picked up was 6" by 10'. That gets me 20 feet (240 inches) x 3 inches of copper donor plates for the plating cells. Each cell takes 9.5-10" of copper flashing. So... I can only get about 24 cells out of the $35 roll. Will have to pick up a second roll once I break over 20 cells at a time. Granted, since I'm steeling only a little bit of copper per bullet, each plate should last a long time.
Oh, 2' x 2' piece of plywood is 36 cells for what it's worth (one every 4 inches).
Speaking of wood... of course it starts snowing after I have a truck bed full wood and gotta spend a few more hours at work. Grrrrrr...
unfy:
--- Quote from: abbafandr on February 14, 2013, 06:54:49 PM ---Do you actually find time to hold down a full time job
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Reloading (and !!!SCIENCE!!!) and job take most of my time hehehehe. Am quite stoked to get the cell-holding-framework all built.
I imagine I'll hit a power problem and need to pick up a different power supply (and not one found locally sadly... but it'll still be cheap). I'll prolly also need to test it as-is and see if my voltage controller is required or not. It'd be kinda nice if it wasn't, I don't think what I've built can handle the possible high amperage I'll be needing.
Although, if you assume 10A per square foot....
10A for 144in
Surface area of a cylinder that is .40in wide by .50in tall is 0.88in.
10A / 144in = N / 0.88
10 * 0.88 = 144 * N
(10 * 0.88) / 144 = N
8.88 / 144 = 0.062
So I need 0.062 amps per bullet.
At 36 bullets for the 2' x 2' cell thing, that's 2.22 amps.
May not be a power problem, I dunno.
unfy:
As is usually the case, drawing it out on the piece of wood makes for an interesting situation heh.
Perhaps it's just electrical engineer background, but a half inch seemed a whole lot bigger in my head than it does on wood.
Power bus bars at 1/2 inch wide will be interesting :P .. given that it puts them as a 'perfect' fit between cells... which aint cool.
Yeah, not happy.
5x5 instead of 6x6, this will yield ~ 1.25 inches between stuff.
unfy:
wood framing for cells mostly built. picked up the wrong hole saw stuff, will have to grab a proper thing.
been a busy weekend with other stuff (friend having heart bypass surgery).
the move to 5x5 cell orientation is a bit curious concerning even power flow, but given the size of the galvanized thingies, it should do okay. 5x5 means there are 4 rods feeding 5 rows/columns... which doesn't spread otu power perfectly evenly.
for those with any electrical background, the galvanized whatever isn't a problem concerning resistance and stuff. its basically so thick / big that it's only 0.5 ohm from one end to the other. also given it's size, the power concerns should be moot.
if i have to backup and punt, can always use the copper tubing.
i've got... either 12 or 14 more holes to drill in metal for the base of the frame (power bus bar.... i've got one half drilled but messed up and need to decide if to keep or toss, prolly toss)... and the 25 holes for cells. then it's 16 wood screws to secure the plywood to the frame and 16 bolts for the bus bars.
At the moment I'll skip some concerns about circuit length concerning the bus bars ... can always use some wire to make sure they're all equidistant if need to.
Haven't put any thought into clothespin hanger stuff yet. want the base built and then i'll figure that out.
GreyGeek:
--- Quote from: skydve76 on February 14, 2013, 06:45:28 PM ---I hear that construction sites are a good place to get copper, as well as AC units.
--- End quote ---
Especially by those who shop at the Five Finger Discount Stores! :)
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