What the resistor is fixing is inadequate Voltage Compliance in the power supply. For these Chinese power supplies (3A and 20A) I guessed the minimum voltage compliance to be 1V. Caswell is sending me one of each to measure the voltage compliance, and we will then know the exact number.
This has turned out not to be an issue when anodizing, the electrical conductance of anodizing electrolyte is nowhere near as conductive as a copper plating solution.
Better designed CC/CV power supplies will maintain their voltage compliance all the way down to zero Amps and zero Volts, but these cost more.
When I know the actual value by measuring the Chinese power supplies, I'll post it. We will then be able to arrive at one value and size resistor for each power supply and be done with it. This doesn't have to get complicated.
Again, this is a plating detail, this is a non-issue when anodizing.
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