During the optics calibration of a vision probe, if a certification data file (fovcert.dat) exists in the probe directory, PC-DMIS reads the file and uses it to adjust the calibration data from the nominal. A fovcert.dat file supports data for these feature parameters:
The X and Y size of the concentric rectangles
The X and Y center positions of the concentric circles
Information about the fovcert.dat File
The first line must be the file schema number.
A semicolon at the start of a line denotes that the line is a comment.
Comment lines may not start with a space character.
The [PATTERN] value is a hex bitmask that denotes the rectangle edges to be measured in X and Y. The position of the edges is from left to right and from top to bottom. For example, a value of 0xAA hex is 1010 1010 binary. This translates to use the first and third edges in the X direction and the first and third edges in the Y direction for rectangle measurement.
All values are in mm.
This example contains a sample nominal fovcert.dat file:
2 [PATTERN] 0xAA [RECTANGLES] ;X size Y size 17.2 13.2 10.75 8.25 6.45 4.95 4.3 3.3 2.15 1.65 1.29 0.99 0.86 0.66 0.5375 0.4125 0.3225 0.2475 0.215 0.165 0.1075 0.0825 0.043 0.033 [CIRCLES] ; nom diam centerx centery 30 0.0 0.0 20 0.0 0.0 10 0.0 0.0 5 0.0 0.0 2.5 0.0 0.0 1.25 0.0 0.0 0.625 0.0 0.0 0.25 0.0 0.0