## 2 Materials and Methods
### Testing Phase
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Parameter** & \multicolumn{2}{c}{**Surface Topography of Industrial**} & \multicolumn{2}{c}{**Surface Topography of Cutting**} \\  & \multicolumn{2}{c}{**Cutting Blade**} & \multicolumn{2}{c}{**Edge 1**} \\ \cline{2-5}  & & **Value** & **Unit** & **Value** & **Unit** \\ \hline Area of a single & \multirow{2}{*}{\(1.50\times 1.50\times\) x.xx 2  } & \multirow{2}{*}{mm} & \multirow{2}{*}{\(0.90\times 1.25\times\) x.xx 3  } & & \\ topography (axes \(x\), \(y\), \(z\)) & & & & \\ \hline The number of profile & \multirow{2}{*}{3001} & \multirow{2}{*}{–} & \multirow{2}{*}{2349} & \multirow{2}{*}{–} \\ points (axis \(x\)) & & & & \\ \hline Distance between profile & \multirow{2}{*}{0.5} & \multirow{2}{*}{\(\mu\)m} & \multirow{2}{*}{0.384} & \multirow{2}{*}{–} \\ points (axis \(x\)) & & & & \\ \hline The number of profiles & \multirow{2}{*}{301} & \multirow{2}{*}{–} & \multirow{2}{*}{251} & \multirow{2}{*}{–} \\ (axis \(y\)) & & & & \\ \hline Distance between profile & \multirow{2}{*}{5} & \multirow{2}{*}{\(\mu\)m} & \multirow{2}{*}{5} & \multirow{2}{*}{\(\mu\)m} \\ points (axis \(y\)) & & & & \\ \hline Vertical resolution (axis \(z\)) & x.xx 2  & \(\mu\)m & x.xx 3  & \(\mu\)m \\ \hline Measurement time & 1773 & s & – & – \\ \hline \hline \end{tabular}  
* Filtering process: Filter type: Gaussian, surface size: \(1.15\times 1.50\) mm (3001 \(\times\) 301 points), standard cut-off: 0.25 mm, filter size: 0.25 \(\times\) 0.25 mm (652 \(\times\) 51 points); 2 Values of vertical resolution (axis \(z\)): B1-1: 0.163 mm, B1-2: 0.153 mm, B1-3: 0.119 mm, B1-4 0.184 mm, B1-5: 0.197 mm, B1-6: 0.187 mm, B1-7: 0.211 mmv3 Values of vertical resolution (axis \(z\)): B1-1: 0.031 mm, B1-2: 0.030 mm, B1-3: 0.030 mm, B1-4: 0.025 mm, B1-5: 0.024 mm, B1-6: 0.030 mm, B1-7: 0.019 mm.  
\end{table} 
Table 5: General characteristics of measurement conditions. Figure 7: Multisensory optical profilometer Taylor-Hobson Talysurf CLI 2000 during measurements of low-stiffness planar industrial cutting blade (sample B1-7). Figure 9: Collection of results of measurements obtained by the use of multisensory optical profilometer Taylor-Hobson Talysurf CLI 2000 for surfaces of low-stiffness planar industrial cutting blades regenerated by the precision grinding process (front grinding) realized in a 5-axis CNC grinding machine: (**a**) Sample B1-4 (\(v_{w}\) = 400 mm/min, \(n_{s}\) = 38,000 min\({}^{-1}\)); (**b**) sample B1-5 (\(v_{w}\) = 450 mm/min, \(n_{s}\) = 38,000 min\({}^{-1}\)); (**c**) sample B1-6 (\(v_{w}\) = 500 mm/min, \(n_{s}\) = 38,000 min\({}^{-1}\)); (**d**) sample B1-7 (\(v_{w}\) = 700 mm/min, \(n_{s}\) = 38,000 min\({}^{-1}\)). The collection of results of the measurements obtained by the use of multisensory optical profilometer Taylor-Hobson Talysurf CLI 2000 for a surfaces of three low-stiffness planar industrial cutting blades regenerated by the peripheral grinding process (\(v_{w}\) = 300-400 mm/min, \(n_{s}\) = 38,000 min\({}^{-1}\)) realized in a 5-axis CNC grinding machine is presented in Figure 8. The analysis of the above results allows to state that for all regenerated surfaces of cutting edges, one can observe clear machining marks characteristic of the grinding process. Marks, perpendicular to the working movement direction of the cutting edges, were shaped more or less regularly with similar spacing. Their height (given by \(St\) amplitude parameter) was in a level \(\sim\)15-16 \(\upmu\)m (samples B1-1 and B1-3--Figure 8a,c, respectively  
and \(\sim\)3-4 \(\upmu\)m (smooth area) in relation to sample B1-7 (Figure 9d). A comparison of the results of the analyses, presented in graphical form with the values of surface texture parameters, is listed in Figure 10a-c (bottom). It can be noticed that for the cutting edge of sample B1-7, the lowest values were obtained (\(Sa=1.26\)\(\upmu\)m, \(St=19.6\)\(\upmu\)m, and \(Str=0.622\)\(\upmu\)m).