The Nucleo blocker also sends back information on the block/blank geometry, which Rx-Universe will save and use for subsequent communication with other equipment. One of the pieces of information sent back by the Nucleo is the measured front curve of the blank that has been blocked. If the measured front curve differs from the stored front curve in Rx-Universe, value used for the calculation, Rx-Universe will automatically re-calculate the job; if the measured front curve differs from the stored front curve by a large amount, this may indicate the wrong base curve was pulled, and the job can be placed on hold for manual investigation.
The system default for how much variance is allowed between the measured front curve and the stored front is set up under "Setup", "System Settings", on the "Devices" tab:
The "Nucleo blocker recalculate" value specifies when Rx-Universe should recalculate the job - in this example, if the measured front curve is more than 0.03D different than the stored value, the job will be recalculated. The "Nucleo blocker failure tolerance" specifies the maximum difference that is allowed between the measured value and the stored value - if the front curve differs by more than this amount, it will not be recalculated, but rather, the job will be placed on hold, as such a wide difference could indicate the wrong base or blank has been placed in the tray.