1.       Pressure Coef.: pressure coefficient

2.       Sliding-V Coef.: sliding velocity coefficient

3.       Hardness Coef.: hardness coefficient

4.       Wear Coef.: wear coefficient

5.       Hardness: hardness

6.       Dynamic Para: dynamic parameter

Toggle on DYNAMIC PARA option and click SET button, and the user can enter the dynamic parameter setting dialog box, as shown in Figure 8.5.2. After quitting eta/ POST, the dynamic parameter will be automatically saved in the configuration file. These parameters will be loaded automatically when you open eta/POST next time.

Figure 8.5.2 . Dynamic parameter option

In the dynamic parameter setting dialog box, W depth means wear depth level, K depth means wear coefficient level and H depth means hardness level. The condition is W1 < W2 < W3.

The purpose of dynamic parameters is to apply the property of real worn tool specification. With the wear depth increasing, the wear coefficient and material hardness will no longer be constant number, they can be changed. For example, the wear coefficient can be increased and the hardness value can be decreased.

During the tool wear calculation for each calculating step, the calculated wear depth will be compared to the user-defined W depth level and then its corresponding K and H should be reflected, as shown in Figure 8.5.3. Suppose the current calculated wear result is W, the current wear coefficient is K, the current hardness is H; the user defined wear depth levels are W1, W2, W3, the user defined wear coefficient levels are K1, K2, K3, the user defined hardness levels are H1, H2, H3.

If  W≤ W1,            K= K1     H = H1

If  W1< W≤ W2,    K=K2      H = H2

If  W2< W≤ W3,    K=K3      H = H3

If  W> W3,           K=K3      H = H3                                                                                                                                                  

Figure 8.5.3  Tool wear schematic illustration