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SAMLight Manual > Option MOTF > Calibration

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In the following, a general calibration routine is described.

This consists of:

•calibration of the optic system in the static situation, meaning without any movement of the belt

•calibration of the (well-calibrated static system) in the dynamic situation for the USC-1 card

•calibration of the (well-calibrated static system) in the dynamic situation for the USC-2/3 card

 

The following jobs are useful for calibration: a simple text object like "ABC" to check the orientation, a circle for easy observation of the compensation and a grid to check the accuracy.

SL_ABC-circle

Figure 356: ABC-circle job

ABC-circle.sjf consists of the letters A, B and C in a single laser font and a circle.

GRID.sjf

Figure 357: Grid job

Grid.sjf consists of grid vectors (e.g. hatch a square) to check the X and Y aspect ratio. If calibrating the static system, the grid may cover the whole field size.

note

Set Rotation to 0 in Settings - System - Optic (Advanced)! Put a rotation, if necessary, in the correction file because the correction file is applied after MOTF compensation.If you want to use Rotation in the settings, MOTF compensation is necessary in x and y direction, see example rotated scan head.