To Create a Midline Line
By using the Midline option, you can create a Constructed Line midway between two previously created Constructed Lines. The reference lines can be at any angle to each other.
1. Click Inspect > Line/Axis. The CMM Construct Step dialog box opens.
2. Select the parent reference Csys from the Parent Csys drop-down list.
3. Select Midline from the Type drop-down list.
4. Select 2 measure or construct steps of the following types:
Cylinder (axis)
Cone (cone axis)
5. Click OK.