Hi:
A robber is simply a piece of copper wire that protects a high current area.
By this I mean that a pointed part on a item will conduct a lot more current then a flat or recessed area. This will cause the pointy area to burn.
The robber has to be electrically attatched to the part itself. That way it will act as a higher current area then the place your trying to protect. This will also allow you to increase the current if you have some low current areas that are not getting much plating.
Basically the robber takes the hit of the high current and the part plates more uniformly. Robbers usually grow funny growths on them and burn..that is normal.
Shields will do the same but are a reverse of a robber. They protect areas by blocking it off from the current and allowing other areas to plate either faster or as normal.
Hope this helps.
48BUICK
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