Hi Toni2,
I have been playing around with this and I do not believe it is possible to add a second z-axis with a different range to the CWgraph3D ActiveX control. It seems that you are limited to multiple plots referenced against the same z-axis. You can always just scale the data for the 2nd plot before sending it to the graph, then explain your scaling elsewhere. I know it's not exactly what you are looking for, but it could pass for a solution!
Brian A.
National Instruments
Applications Engineer