## 3 Results and Discussion
### Consumption of the Cutting Power  
The results of the processing of the cutting power values in the program Statistica 12 are given in Table 4. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Parameter** & **F Value** & **Cutting Power** \\  & **F Value** & **\(p\) Value** \\ \hline Feed speed & 526.24 & 0.000 \\ Rotation speed & 30.57 & 0.000 \\ Circular Saw Blade & 19.44 & 0.000 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Analysis of variance showing the influence of the circular saw blade, feed speed, and rotation speed on the cutting power. \begin{table}
\begin{tabular}{c c} \hline \hline
**Parameter** & **Value** \\ \hline Power supply & 6 \(\ldots\) 28 Vss \\ Measuring range & \(-\)40 \(\ldots\) + 1000 \({}^{\circ}\)C (adjustable) \\ Output & 4 \(\ldots\) 20 mA, USB \\ Optika & 30:1 \\ Emissivity & Adjustable via USB and computer \\ Spectral range & 8 \(\ldots\) 14 \(\upmu\)m \\ Accuracy & \(\pm\)1\% of value or \(\pm\) 0.5\({}^{\circ}\)C (whichever is greater) \\ Housing operating temperature & 0 \(\ldots\) + 70 \({}^{\circ}\)C \\ Response time & 240 ms (90\%) \\ Dimensions & \(\Omega\)25 \(\times\) 106.5 mm \\ Mounting & Thread M20 \(\times\) 1 \\ Coverage & IP65 \\ Case material & Stainless steel AISI304 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Temperature sensor parameters. The Statistics 12 program shows that all considered cutting factors have a significant effect on the consumption of cutting power at a significance level of 0.95. More precisely, the design of the circular saw blade, the feed speed as well as the rotation speed affect the value of the cutting power. According to Statistica 12, the feed speed was the factor that had the greatest impact on cutting performance. Rotation speed was the second most important factor influencing the cutting power. Figure 4 shows the effect of the feed speed and circular saw blade design on the cutting power. Increasing the feed speed from 14 to 21 m/min significantly reduced the cutting power by 10%. Increasing the feed speed from 21 to 28 m/min significantly increased the cutting power by 39%. Similar results were reported by the authors of [11]. The modified design of the CSB3 circular saw blade compared to the classic (unmodified) design of the CSB1 circular saw blade reduced the cutting power values of 8.0%. Figure 5 shows the effect of the cutting speed and circular saw blade design on the cutting power. The figure shows that the cutting power increases with an increasing feed speed for all circular saw blade designs at the feed speed used. The increase of speed within range of (4050-4150) rev/min caused an increase in cutting power of 11%. However, this finding contradicts [22], where the problem is discussed that a higher cutting speed can reduce the cutting power. The authors justified this by the fact that there is a reduction in the tool-workpiece friction and changes in lignin in the cut area. Some other scientists [12; 14] stated in their work that the cutting speed did not have a significant effect on the cutting power. These conclusions correspond well with the results obtained in our experimental measurements. The critical factor in the sawing process on a circular saw is the average chip thickness. It has a significant effect on cutting power and dust emissions. Figure 6 shows the effect of the mean chip thickness and circular saw blade design on the cutting power. Figure 4: Effect of the feed speed and the design of the circular saw blades on cutting power. From Figure 7, the circular saw blades CSB1, CSB2, and CSB3 had the lowest cutting power at a mean chip thickness of 0.097 mm, which corresponded to a feed speed of 21 m/min. The cutting power increased with decreasing mean chip thickness up to 0.063 mm, which corresponded to a feed speed of 14 m/min. The authors of [15,21] also mentioned this important phenomenon in their works. The highest cutting power of all three circular saw blades was measured at a mean chip thickness of 0.13 mm, which corresponded to a feed speed of 28 m/min.