[Tom Line]

We worked with that for a while, but found that an exponential curve resulted in too gentle a curve around the Zero point, and hence too large a deadband.

Instead we moved to linear formulas (using 2 X/Y coordinates that we set up as controls in Labview so they could be tuned on the fly).

You can fix the deadband by changing your Y intercept too. It's fun to play with functions like that.