Additive manufacturing machine calibration based on a test-page based object

A non-transitory computer-readable medium having stored thereon instructions which when executed by a processor cause the processor to perform calibrating an additive manufacturing machine, the method comprising:

• obtaining a model for the additive manufacturing machine;
• obtaining a baseline sensor data set for a particular additive manufacturing machine;
• creating a machine-specific nominal fingerprint for the particular additive manufacturing machine with controllable variation for one or more process inputs;
• producing on the particular additive manufacturing machine a test-page based object;
• obtaining a current sensor data set of the test-page based object on the particular additive manufacturing machine;
• estimating a scaling factor error or a bias for each of the one or more process inputs from the current data set by:
• deriving a machine-specific perturbated fingerprint by introducing a variation to laser power level process inputs to the additive manufacturing machine and beam size process inputs to the additive manufacturing machine;
• and
• fitting the current sensor data set to the machine-specific perturbated fingerprint with the scaling factor error or the bias as the parameters to be estimated;
• and
• updating a calibration file for the particular additive manufacturing machine if the estimated scaling factor error or the estimated bias are greater than a respective predetermined tolerance.