Stop Manipulation on Clash 

When moving assemblies (using the compass along with the Shift key or the Manipulate command, see Manipulating Components), components may sometimes clash.
This task shows you how to view the minimum distance between these components to avoid a clash.
Space Analysis results are only kept when you save the document, when a DMU Space Analysis license is installed.
A clash is detected only when the With respect to constraints option is checked in the Manipulation parameters dialog box:
 
  Open the Assembly_01.CATProduct document and perform all the tasks of the Assembly Design Getting Started section until "Moving Components".

  1. Drag the compass onto CRIC_SCREW.

 

  1. Press and hold down the Shift key, select v/z axis on the compass, then drag and drop the component so as to obtain this clash:
 

The components involved in the clash are now highlighted to facilitate your work.
 
 

  1. Click the Manipulation on Clash icon:

 

  1. Move the component slowly from right to left, then from left to right to repeat the clash.
 

The application stops the move operation just before the clash occurs.
 
 

  1. Repeat the operation more quickly: the operation is stopped earlier, which makes the gap larger between both components.
 
 

What you need to know is that the more slowly you handle the mouse, the smaller the distance between the components is.
 

  1. To quit the command, simply click the Manipulation on Clash icon again: . You can compute clashes again if needed.
The accuracy of clash detection directly depends on the one used for tessellation (SAG) on objects. This is set in the Performances tab of Tools > Options > General > Display. By default, this value is set to 0.2 mm.

For more details, refer to About Interference Checking & Analysis in DMU Space Analysis documentation.