CREATE ARC

 

This function allows the user to generate arcs.  As illustrated in Figure 5.1.5, arcs can be generated using three approaches.

Figure 5.1.5 Create Arc dialog box

 

1.        CENTER AND RADIUS

 

          Define a LCS. Refer to Section 11.15, LOCAL COORDINATE SYSTEM, for information about defining LCS.  The center of the arc will be positioned at the origin of LSC, and the arc will be in the UV plane of the LCS.

 

          Key in the values in the ARC PARAMETER dialog box as illustrated in Figure 5.1.6.

Figure 5.1.6 Arc Parameters dialog box

 

RAD:       Radius of arc

 

TH1:        Beginning angle from U-axis

TH2:        Ending angle from U-axis

 

INC:        Angle increment between points (default is 5 degrees) on an arc

 

2.        TANGENT TO 2 LINES

This function allows the user to create an arc that is tangent to 2 lines.  

 

          Select two intersecting lines. Refer to Section 4.4.1, PART/ADD LINE, for more information about selecting lines.

 

          Enter the radius in the input field of RADIUS OF ARC dialog box as illustrated in Figure 5.1.7.

Figure 5.1.7 Radius of Arc dialog box

 

3.        Create by THROUGH 3 PTS

This function allows the user to create an arc through three non-collinear points/nodes.

 

          Select three points/nodes. After the third point/node is selected, the arc and its center will be generated.