"Don Foreman" wrote in message
...
Check to ensure that connections are tight and clean. A few
thousanths of a ohm of resistance in a connection or bussbar would
cost you several volts at the current levels you're working with.

I have 18.5 volts between the anode and ring ... a 1.5 volt drop from source
at 1100 amps
that is about what I would expect. We use 4.0"x0.5" bus

I'll say up front that I have zero experience with chrome plating, but
I see a big difference between 12 anodes and one anode. More anode
area will present less resistance (and heating) in the tank.

Ya ... I agree

Scaling things to my experience at the 1-amp level with nickel, copper
and zinc, I'm quite sure that an .003" dia anode would not work well.
I'd bet you're right that you need a lot more anode surface area than
a 3" dia anode of given length provides.
It's a 3.0" anode
It's another alien abduction story ... the supervisor really believes he did
the job this way but something had to have changed. Ohm's Law has yet to be
broken .

Tom


On Wed, 01 Dec 2004 04:33:20 GMT, "invntrr"
wrote:

Most of our plating is O D on large rings ... but recently a job was set
up
for I D.
The O D rings are about 20" and we have 12 anodes in the tank. Plating is
done at 1900 amps
The I D rings are the same size but we only use one 3" anode in the center
of the rings

The supervisor claims they did this job before and never had a problem
getting 1900 amps but the most I can get is 1100 amps at 20 volts max for
rectifier
I believe it's my lack of surface area but he says " We never had a
problem
before "

I checked the unit with an OD dummy load and have no problem getting 3000
amps so I know the units capable of supplying the current

Tom