For the XT-50 we highly recommend that two calibration runs are carried out. The first
run should be done ± 5 mm around 60 mm WD (with 1 mm iterations).
The working height at which the engraved lines are the thinnest is the distance to which
you should move your laser head (ie. at which you should use it) and which will give you
the best results.
The second calibration run should be done with an accuracy of 0.1 mm (in 0.1 mm
iterations) around the best WD established during the first calibration run. Some users
calibrate the XT-50 with even greater accuracy, e.g. 0.02 mm during a third calibration
run.
NB: Most customers perform the working distance calibration process on plywood.
Better results can be obtained on black anodised aluminium (but then the
engraved aluminium should be tilted by a small angle, e.g. 4-7°). However, the best
calibration results can be achieved by marking a microscope slide, painted with a black
spray before the procedure.
NB2: The beam profile of the XT-50 (and XT-10) is always symmetrical.
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