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Determination of the stylus force from a tactile measured profile (zero load corrected) of the cantilevers 45-1 (a) and 70-4 (b) using the difference method after Equation (8); Δx: 500 µm; 1000 µm; 2000 µm. The red lines result from a function z(x)= a · x3 fitted at the base of the measured values; see Table 8.
