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Old 12-23-2007, 01:26 PM
seanc seanc is offline
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Default Re: Copy CAd/Zinc Parts plated grey???

Quote:
Originally Posted by amobine View Post
On average It is approx. 12 sq. inches or less.
12" requires only 1.2 - 1.7 amps, depending on your electrolyte. At 3 amps, this part would burn badly.

Quote:
or it may be about 2-3 bolts with washers and nuts, bolts being about 5" long, 1/2" dia.
Well, it can't be "about x number of parts". You have to be fairly close in total sq-inches.

A rough estimate shows a 5" x 1/2" bolt by itself is approx. 12 sq-inches. 3 of these at once would need 3.6 - 5 amps. In this case, you don't have enough current! Adding 3 nuts and washers at the same time only makes it worse.

Quote:
Should I lower the amps??
Set the amps to whatever the parts require. Determine the total square inches of the parts, multiply by .14 (or .1 depending on which electrolyte), and set the current to that value.

Quote:
Also for how long?
How long depends on how thick a plate you want. With the new formula at .14 amps/sq-inch, 20 minutes gives .001" thick plate.

Sean
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