Do not calibrate unnecessarily. This game features an option that will allow the game to utilize saved data on the SDCARD to improve the ability to manage skilled players. The game will record the value read by the piezo sensor when players hit the hit pad during each game. The game was calibrated at the factory. It will create values for Sigma and minimum hit value and use these until it has sampled enough to use the auto calibration settings you selected. Achieving the bonus is based on sigma and minimum hit value that was created during calibration until it has sampled enough to use the SDCARD's file. The payout will be more accurate as more data is written to the SDCARD. The option to set auto calibration is called "Calibration Sample Amount". The default value for this option is 1 meaning it will use a pool of 200 plays to calculate the values used to achieve the bonus. Until 200 plays are achieved, it will still use Sigma and minimum hit value. A value of 2 will use a pool of 500 plays and a value of 3 will use a pool of 1000 plays. As more plays are recorded it is recommended to adjust the Calibration Sample Amount option accordingly. Starting with 3 will result in possible high payouts or low payouts until 1000 plays have been played.
When replacing the main board, it is recommended to reuse the old SDCARD if possible