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# – Non-Uniform Scale: Options and Results

Increase/decrease the volume of an object(s) or the size of a face or sketch.

Note: When creating a Non-Uniform Scale, the Automatic Preview operation may be time-consuming. A checkbox in the Preferencesenables you enable/disable the Automatic Preview option in the Feature Guide when executing the Scale function.

## Non-Uniform Scale

To demonstrate how to apply non-uniform shrinkage, the following part will be used:

## Required Step 1

All Objects is the default selection. To pick one or more objects (open or closed), faces, sketches or UCS’s (except the Model UCS), toggle the All Objects button to By Pick. (Define the Selection Filter settings as required). Select one or more objects, either open or closed. Toggle the Uniform field to Non-Uniform. Press exit when all objects are selected.

## Required Step 2

Select the pivot point for the scale. This point will remain stationary while the rest of the part moves. In addition, you must choose theUCS whose axes will be used to define the scaling in each direction.

## Required Step 3

Define how you wish to scale the entities by pressing the toggle button: By Ratio / By Bounding Box.

 By Ratio Create a non-uniform scale of entities by using the currently boundaries. By Bounding Box Create a non-uniform scale of entities by defining a new X, Y & Z bounding box length.

### By Ratio

Create a non-uniform scale of entities by using the currently boundaries.

Set the Scale parameters. A set of UCS coordinates will appear at the pivot point, and you can specify a separate scale value for each axis.

In the case below, all dimensions will increase according to the axis direction.
The total volume increase = 1.03 * 1.05 * 1.06 = 1.14, a 14% increase.

When you have set the parameters, press OK  or Apply  in the Feature Guide to complete the function. The scaling is applied to the object.

To verify the results of the function, you can use the measuring tools to check the object dimensions.

### By Bounding Box

Create a non-uniform scale of entities by defining a new X, Y & Z bounding box length.

This option is not available if you chose the By Object option in the 1st step. The By Bounding Box option is only available if the input selection contains real geometry (objects, faces wire and not points or datums).

The system calculates the bounding box of the selected entities (before scaling) according to the active UCS and displays the box.

Two sets of parameters are displayed:

 Old X/Y/Z Length These are the lengths of the bounding box – before scaling. These parameters are grayed out and are for display purposes only. New X/Y/Z Length These are the lengths of the bounding box – after scaling. These parameters can be edited to scale the entities.

Set the New X/Y/Z Length Scale parameters. A set of UCS coordinates will appear at the pivot point, and you can specify a separate scale value for each axis.

In the case below, all dimensions will decrease according to the axis direction.
The total volume decrease = 0.585, a 58.5% decrease.

When completed, the Scale will appear in the Feature Tree as follows: