For finding the automatic voltage your methods are correct, and 130 volts will more than likely be your correct number for that setting. However at the beginning of the cut you need to set the Pierce Height and Initial Cut Height settings to their appropriate levels. Typically the pierce height would equal approximately 3/16" (4.75mm) off the plate, and the initial cut height would be slightly lower than that, about 1/8" (3.2mm). The machine will sense the material, and back off to pierce height, at which point it will activate the cutting arc. The cutting arc should ignite, and then the height control would move into the initial cut height setting, and move down slightly, before the machine started its X and Y motions.
The timing of when the height control drops to the initial cut height after it reaches its pierce height is controlled in two different ways, depending on how your system is setup. If you are using an OK to Move signal from the plasma cutter, the Pierce Delay setting in the Setup menu determines how long after it receives the signal from the plasma cutter, before it drops to initial cut height. If you are not using the OK to Move signal, the pierce delay controls how long after reaching the pierce height before it drops down to initial cut height, and initiates motion.
I'm pretty sure you have Jack's Email, if you have any further questions, please let him know!