Creating Sew Surfaces  

This task shows how to sew a given surface onto an existing support. It adds or removes surface by modifying the existing element. Sewing is a Boolean operation combining a surface with an existing element. It is available with hybrid bodies, geometrical sets and ordered geometrical sets.

Open the SewSurface1.CATPart document.

  1. Click Sew Surface  in the Operations toolbar (Trim-Split sub toolbar).

    The Sew Surface Definition dialog box appears.

  2. In the Support surface box, select the surface onto which the other should be sewed.
     

  3. In the Object to sew box, select the surface to be sewed.
    An arrow appears indicating the side where material will be added or kept. Note that clicking this arrow reverses the given direction.
     

  4. In the Deviation box, choose the deviation tolerance computation mode:

    Option Description
    None No tolerance is considered for the feature computation.
    Automatic The previous deviation value is selected.
    Manual In the Max Deviation text box, you can specify a user-defined tolerance.

    • The result is computed with a default tolerance value which depends on the scale selected in the Design
      Range list in the Design Limits area in Tools > Options >  Parameters and Measures:
      Small range: 0.001
      Normal range: 0.1
      Large range: 10
    • The User defined value must be less than the Design range*100.

  5. Click OK.
    The surface is sewn onto the object.
    The feature (identified as SewSurface.xxx) is added in the specification tree.