Dimensioning a Tangent Point in NX

In some of the conditions creating a dimension on a circular object that specifies a tangent point might be a problem. The reasons and solutions of this problem are listed below.

Problem: 

• I can not select a tangent point on the circle.
• The “Tangent Point” snapping option turns off automatically when I start the dimension command. All “Snapping Options” became deactivated automatically and I can not change them.
• I can not activate the “Tangent Point” snapping option on the “Top Border Bar” when the “Dimension” command is active.
• When I try to select the second object to dimension, the Snap options change and I can not change them.

Notes for Solution:

• First of all, if you want to dimension a tangent point on a circular object, the “Tangent Point” snapping option should be activated.
• Snapping options change according to command and selections in the command dialog box in NX.

Solution:

1. Start the “Rapid Dimensioning” Command.
2. Snapping options on the top border bar is active because the “Select First Object” bar in the “References” tab is active. You can change the “Snapping options”
3. Select the first dimensioning point.
   
4. Snapping options turn off automatically and you can not select a tangent point on a circular object. The dimension snap on the circle center or curve end.
5. Solution: 
   1. In step 3 you did not select o point. 
   2. You selected a curve or another object.
   3. The “Rapid dimension” command tries to create a dimension by using the selected object. The “Specify Location” bar is highlighted automatically. The snap options turn off because of the “Specify Location” bar activation in the command dialog box.
   4. Click on the “Select Second Object” bar under the “References” tab in the dialog box.
      
   5. The “Snap Options” will be activated automatically. 
   6. Turn on the “Tangent Point” snapping option on the “Top Border Bar”
6. You can select a tangent point on a circle.