Breaking and Trimming 

This task shows how to quickly delete elements intersected by other Sketcher elements using breaking and trimming operations.
Open the Sketcher_01.CATPart document and ensure that the Geometrical Constraints option is activated:

  1. Click Quick Trim .
    The Quick Trim options are displayed in the Sketch tools toolbar.

  1. Select the Beak and Rubber In option .

  1. Select the arc you wish to be deleted from Circle.2.
    The arc of circle has been trimmed as shown here. Coincidence constraints have been created.

  1. Click Quick Trim .

  1. Select the Beak and Rubber Out option .

  1. Select the arc you wish not to be deleted from the Circle.3.

    The arc of circle has been trimmed as shown here. Coincidence constraints have been created.

  1. Click Quick Trim .

  1. Select the Break and Keep option .

  1. Select Line.3 as the element you wish to be broken.
    Line.3 has been broken in three segments delimited by the other lines. Coincidence constraints have been created.

  2. Optional: Click Free Hand Selection to select and trim multiple elements.
    The following table shows the resulting trimmed geometries for different combinations of options, selected in the Tools Palette.

    Selection  Free Hand Selection + Break And Rubber In  Free Hand Selection + Break And Rubber Out  Free Hand Selection + Break And Keep 


    Press and hold Shift to move the pointer over certain parts of the sketch without considering it for trimming.

  • If you need to delete several elements, you can double-click the icon and delete the elements one after the other.

  • You cannot apply Quick Trim and/or Break to composite curves (which are projected/intersected elements composed of several curves). However, you can work around this functional restriction by using the Trim command (this enables you to get the same results for composite curves than by performing the Quick Trim and the Break operations).