Circle Center Mark in NX Drafting

You can create centerlines on the center of the circles by using the “Centerline Drop-Down” commands in the NX Drafting.

To activate Centerline commands:

1. Click on the centerline command on the path of “Home Ribbon Bar => Annotation Group => Centerline Drop-Down arrow => Centerline Commands
2. Menu => Insert => Centerline => Centerline Commands

The Centerline commands in the NX Drafting:

1. Center Mark
2. Bolt Circle
3. Circular
4. Symmetrical
5. 2D Centerline
6. 3D Centerline
7. Automatic
8. Offset Center Point Symbol

Center Mark: You can create a center mark that specifies an arc/circle center. Also, you can create a centerline between two objects.

To create a single center marks o each circle:

1. Start the “Center Mark” command.
2. Turn on the “Create Multiple center Marks” checkbox in the dialog box.
3. Select the circles to create a center mark on (“Select Object” bar in the dialog box is highlighted)
4. The preview will be seen in the graphics window.
5. Click “Ok” to finish the command.

To create a centerline through two objects:

1. Start the “Center Mark” command.
2. Turn off the “Create Multiple center Marks” checkbox.
3. Select the first object.
4. select the second object.
5. The centerline preview will be seen in the graphics window.
6. Click “Ok” to finish the command.

Note: By default, you can only select the circle centers. To select other objects change the snap settings on the “Top  Border Bar.

Bolt Circle Centerline: Creates centerlines on circles that are placed on a circular layout.

1. Start the “Bolt Circle Centerline” command.
2. If you want to create centerlines by selecting circles, 
   1. Click on the drop-down on the first tab and set it as “Through 3 or More Points”
   2. Select the circles.
3. If you want to create centerlines by using a circular layout center, 
   1. Set the drop-down as the “Center Point”.
   2. Select Layout center.
   3. Select circles on the layout.
4. The preview will appear on the graphics window.
5. Click the “Ok” button to finish the command.

Circular Centerline: It is nearly the same as the “Bolt Circle Centerline” command but there is no center mark on the selected circle centers.

2D Centerline: Creates a centerline in the middle of selected straight two objects or through points or arcs.

Centerline between two straight curve:

1. Start the 2D Centerline Command.
2. Set the drop-down menu in the first tab as “From Curves”
3. Select the first curve. (“Select Object” bar in the “Side 1” tab highlighted)
4. Select the second curve. (“Select Object” bar in the “Side 2” tab highlighted)
5. The centerline preview will appear in the graphics window.
6. Click the “Ok” button to create a centerline and close the command dialog box.

Centerline through points:

1. Start the 2D Centerline Command.
2. Set the drop-down menu in the first tab as “By Points”
3. Select the first object. (“Select Object” bar in the “Point 1” tab highlighted)
4. Select the second object. (“Select Object” bar in the “Point 2” tab highlighted)
5. The centerline preview will appear in the graphics window.
6. Click the “Ok” button to create a centerline and close the command dialog box.

3D Centerline: Creates a centerline on the side view of the cylindrical object. 

1. Start the “3D Centerline” command
2. Select a cylindrical face to define the centerline on it.
3. Click “Ok” to create a centerline.

Automatic Centerline: Creates multiple centerlines on the circles in the selected view.