Notch

When the Create Feature/Notch function is first invoked, you will be prompted to pick one or more shell profiles to contain the notches. End the indication of profiles by Operation Complete. However, if one or more shell profiles are already selected, these are used. Next, the following form is displayed:

Figure 2:10. Form for creation and modification of notches in shell profiles.

The Reference field: Coordinates will result in notches at the positions given in the Positions field. Normal Seams and Refl. Seams places the notches at the intersections with the seams (in normal or reflected positions, respectively) named in the Positions field.

The Indicate Seam Refs toggle: Activating this button means that the intersecting seams should be picked interactively. After closing the form with the Ok button, you will be prompted to pick the seams.

The Positions field: Where to place the notches. If Reference is set to Coordinates, the positions are to be given as a co-ordinate or repetition term in accordance with the setting of the Axis field. Otherwise, this field should contain names of seams intersecting the shell profile trace. Repetition terms are allowed also in this case. Notches will be placed at the intersections between the named seams and the profile trace. Regardless of whether this field contains co-ordinates or seam names, multiple repetition terms separated by comma signs are allowed. This field is irrelevant in case of interactive picking of intersecting seams. Examples of valid input in this field are the following:

• "ESS1010,ESS1050" which will make use of the two named seams (the Reference field must be set to Normal Seams or Refl. Seams)

• "ESS1010(10)1050,ESS1070" which will make use of the seams with numbers 1010, 1020, 1030, 1040, 1050 and 1070 (the Reference field must be set to Normal Seams or Refl. Seams)

• "FR10(5)25" which will set notches at every fifth frame from frame 10 to frame 25 (the Reference field must be set to Coordinates).

The Axis field: The principal axis along which the positions of the notches in the group are placed. The setting of this field is only relevant when the Reference field is set to Coordinates.

The Type field: Standard means that the notch type is given in the field to the right in the form. Arbitrary lets you type in the name of an object from which the notch geometry is taken. Menu will bring up a menu after the form has been closed (using the Ok button). From this menu, you can select the type and the dimensions of the notch. Same As will give this notch definition the same notch type and dimensions as another group of notches, which you will be asked to indicate after the form has been closed.

The Mirrored toggle: Indicates whether the notches should have their normal appearance or be mirrored around the v-axis. This field is irrelevant for standard notches.

The Ok button: Close the form and create or modify the group of notches.

The Cancel button: Exit the operation without creating or modifying any notches.

As mentioned above, notches can be selected from a menu dialog. The selectable notches can be customized. Further information can be found in Customizing dialogs in Hull.