New

Purpose:

To create a new Jig Pillar arrangement.

Prerequisites:

A current drawing must exist.

Instructions:

The definition of Jig Pillars is made based on user-supplied information in dialogs.

The first step of the operation is to select a panel(s) for which the calculation will be done.

It is possible to select one curved panel, two planar panels welded together at a knuckle, a planar knuckled panel with one knuckle, an assembly, or define a curved panel by providing the bounding seams (and possibly inner seams).

For symmetrical panels, you can select for which side the calculation should be made.

If Default is chosen, the Jig Pillars are calculated on the portside of the ship and the resulting jig object will get the suffix "-JIG". PS means that the calculation is performed on the portside image of the panel and SB means that the calculation is performed on the starboard of the panel. The suffix will be "-JIGP" and "-JIGS", respectively.

It is possible to obtain extra curves in the resulting JIG drawing when storing the JIG if indicated through the EXTRA CURVE function.

For the assembly plane definition the following options are available:

• The assembly plane is defined by the corner points.

• The assembly plane is defined by the midpoint.

• The assembly plane should be parallel to the plane X, Y or Z.

• The assembly plane defined by three points (coordinates inputed by user)

If the seam option is selected the panel(s) is tilted the same way as in the Default option and then tilted in a way so that the referenced seam becomes as horizontal as possible. If this option is selected, you are prompted to select another seam after selecting OK.

If the option Other side is selected, the assembly plane is defined on the other side of the surface (normally on the inside of the ship).

The assembly plane defined above can be adjusted by giving angles for rotation or distances sideways to achieve the perfect placement of the Jig Pillars. Using the Adjust function, the assembly plane can be changed.

Before the calculation can start the seam that will be the base for the positioning of the jig rows must be selected, Seam parallel to y-axis. This seam can be given via the name entered directly into the text box selected from the current drawing.

The plane of each jig row will be calculated in the following way:

• It is perpendicular to the assembly plane.

• It is parallel to the intersection line between the assembly plane and a frame plane (if the selected seam is a butt) or a waterline plane (if the selected seam is a longitudinal seam).

• It touches the selected seam in its utmost point.

The intersection between this plane and the assembly plane defines the direction line (that is, the y-axis). The position of the jig rows are measured from this line.

If Seam parallel to sightline has been entered, the assembly plane will be rotated around the normal area of the plane so that the selected seam will be parallel to the sightline. The seam must be an inner seam in relation to the panel.

Once confirmed by selecting OK, the calculations proceed. Current drawing is closed and the results, together with the input objects, are presented on the form that was previously setup.

Result:

A new Jig Pillar arrangement is created and presented in the current drawing.