Exactly, and the distance from the Anode will determine the current density.
You want as even of a distance around the work piece as possible.
for high precision plates I used the rotational method and the bubbling method (I use that with every bath mind you)
Rotational method is the work piece is slowly rotated in the bath, this spreads the errors out over a wider area making it easier to work them out
post plate.
The Bubbling keeps the ion concentrations even through out the bath and helps to bring fresh material around the work piece.
The fully clad tank ensures there is an even field of potential around the work piece. It does not have to be sheets either, just a good wire frame
will do fine. A length of 14awg ground wire will work great for this, we just need a good even field of potential voltage and an ion donor!
So ideally you want a bowl shaped tanks since you're doing cones!
DO THE MATH!!!!!!!!!!!!!!! with out proper voltage and current your trying to piss into the wind of a tornado! but first you need to do the above as
well.
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