To Create Custom Lattice
You can create lattice by custom designing your own lattice cell in Creo Parametric Part mode, and then importing the PRT file into the part model to use as the lattice cell.
Create a part to use as the lattice cell
Before you begin the lattice, create a part to use as a single cell in the Lattice feature. The cell must meet these requirements:
• Prismatic
• Six-sided
• The imported cell’s x-, y-, and z-directions are determined by the x-, y-, and z-directions of the part model’s coordinate system. The other lattice cells will be propagated in these same directions.
• It is also recommended that parallel boundaries have matching contours.
The geometry is imported on a 1:1 scale. Scaling is uniform, if you change the cell size in one direction, it will update all the directions.
The lattice cell part can contain solid geometry, quilts, and curves. However, the resulting lattice cell will be created using only one of the elements, in the following priority:
• Solid geometry—Creates a geometry-based lattice cell.
If the part contains solid geometry, then a geometry-based lattice cell is created.
• Quilts—Creates a surface-based lattice cell. All the quilts in the part are included in the lattice cell. If the lattice representation is full geometry, then the quilts are thickened, and you can edit the thickness.
If the part contains quilts and does not contain solid geometry, then a surface-based lattice cell is created.
• Curves—Creates a beam-based lattice cell. Any selectable straight curves in the cell are converted into beams.
If the part contains curves and does not contain solid geometry or quilts, then a beam-based lattice cell is created.
Create the lattice
1. In the model, click > 
Lattice. The Lattice tab opens.
Lattice. The Lattice tab opens.2. On the Lattice tab, perform these actions:
a. Next to Lattice type, select 
Custom.
Custom.b. To import a part to use as the lattice cell:
a. Click 
Open Cell. The Open dialog box opens.
Open Cell. The Open dialog box opens.b. Browse to the PRT file to use as the lattice cell, and click Open.
c. If needed, edit the lattice cell in the graphics window:
▪ For a geometry-based lattice cell, use the dragger to edit the cell scale.
▪ For a surface-based lattice cell, use the draggers to edit the cell wall thickness and cell scale.
▪ For a beam-based lattice cell, use the draggers to edit the ball diameter, cross section size, and cell scale.
c. To define the direction with which the z-axis of the cell is aligned, under Cell Direction, select Z, X, or Y.
4. For lattice that does not replace a body, you can define the body to which the feature is added. Click the Body Options tab, and perform one of the following actions:
◦ To add geometry to an existing body, click the body collector, and then select the body to which geometry is added.
◦ To create the feature in a new body, select the Create new body check box. The name of the new body appears in the body collector.
5. Click the Cell Type tab, and define the structure of the cells:
a. Optionally, to change the part to use as a cell:
a. Click . The Open dialog box opens.
. The Open dialog box opens.b. Browse to the part to use as the lattice cell, and click Open.
b. To define the cell scale, next to Fixed scale, type the scale for the cell in relation to its size when you import it.
6. Click 
OK.
OK.