Do you have the stock board or and after market?
But here is the basics
There seems to be no magic number for the dwell because each gun is a little different and what works for one Ion might not work for another.
The dwell determines how long the Solenoid is ON while the ROF is a Electronic delay that determines how long the gun waits before checking for a trigger pull. So the firing cycle looks some thing like this
Trigger pulled > Solenoid ON > Wait dwell > Solenoid OFF > Wait ROF delay > Wait for next Trigger pull
Now too low of a Dwell setting will cause the Ion to only partly cycle and not fire. The bolt may move but not to the point it vents the dump chamber
While too high of a dwell will have the bolt stay forward and vent the dump chamber longer then needed and reduce number of shots you get out of a tank
Too low of a ROF delay the bolt will go fully forward but will not fully return and can cause what I call "the amazing bouncing bolt" (this happens cause some boards will see the bolt as a ball in the chamber). This makes it so the loader can't get a ball in to the camber and leaves the dump chamber open again dramatically reducing the number shot from a a tank. Too High of a ROF delay will just slow you down and limit the rate of fire.
more info for the stock board can be found
here
Dwell Change
