Zeiss METROTOM 1500 G3, Operating Instructions Manual, Page: 77 / 120

Setting up the workpiece and measurement
61211-8140502 METROTOM 1500 G3 1.4
7-5
Maximum values for cumulative wall thicknesses
The total of all wall thicknesses to be penetrated by radiation represents
a criterion for the usability of the projections for the reconstruction of a
workpiece. The following illustration shows the different possible lengths
of the irradiation distance. By modifying the alignment of the workpiece,
the maximum distance to be penetrated by radiation can be reduced.
Cumulative wall thickness
The workpiece should principally be aligned to ensure that the maximum
distance to be penetrated by radiation is reduced. At the same time, se-
lect the alignment to ensure that the workpiece surfaces to be measured
are inclined at least 10° to the rotating axis. In this way, disturbing arti-
facts on the surfaces are avoided. The following images show the influ-
ence an alignment of the part has on the quality of the result and the
sharpness of the reconstructed edges.