Cavity

For a cavity please first select Insert > Cavity and place the object. In the subsequent dialog box "Cavity properties", you can then determine all the desired properties, especially its placement on the reverse side.

A cavity is a recess in the main plate, which has been "planed" with a milling cutter to a constant machining height and is therefore plane-parallel to the surface of the main plate. It can be placed both on the front and on the reverse side.

With "Front Panel Designer" you can not only generate interrelated circular or rectangular cavities, but also define unmachined areas within the cavity:

•	Rectangle in a rectangle

•	Circle in a circle

•	Circle in arectangle

•	Rectangle in a circle

Among other things, different fits can be achieved with these features. For example, with the "rectangle in a rectangle" you define a rectangular cavity, with an unplaned rectangular area in its center:

After placing the object you can set the following variables for the required continuous circular cavity in the properties dialog box as well as its placement on the reverse side:

Variable	Description
Cavity shape	Circular
Diameter	Diameter of the continuous circular cavity
Depth	Depth of the continuous circular cavity
Tool	Milling cutter of a set diameter, with which the inner contour of the continuous circular cavity is created
Automatic selection	The cost-effective 3.0 mm milling cutter is selected by default. The selection is adjusted automatically if the value of the diameter of the cavity falls below 3.0 mm. For a circular cavity, a deviating manual setting of the tool is not in principle required and only leads to higher costs (tool change).
Edge machining >>>	The option of producing the front edge of a continuous circular cavity with either a bevel or a rounding (details).
Do not produce object	If you do not want to produce a continuous circular cavity, but to place it on the front panel for information purposes only - for example as a marker - then check this box.

After placing the object you can set the following variables for the required continuous rectangular cavity in the properties dialog box as well as its placement on the reverse side:

Variable	Description
Cavity shape	Rectangular
Width	Width of the continuous rectangular cavity
Height	Height of the continuous rectangular cavity
Depth	Depth of the continuous rectangular cavity
Corner radius	Inner radii of the 4 corners of the continuous rectangular cavity
Angle of rotation	Rotation angle of the continuous rectangular cavity around its reference point
Tool	Tool with which the inner contour of the continuous rectangular cavity (possibly to finalize) is created, whereby the smallest possible radius of the contour can be set if necessary
Automatic selection	The cost-effective 3.0 mm milling cutter is selected by default. The selection adjusted automatically if the value of the corner radii falls below 1.5 mm (as long as the material thickness allows a reduction of the milling cutter diameter). For a rectangular cavity, a deviating manual setting of the tool makes sense for example if a corner radius of "zero" is also compatible with the more cost-effective 3.0 mm milling cutter (where the reduced long sides still allow for secure assembly).
Edge machining >>>	The option of producing the front edge of a continuous rectangular cavity with either a bevel or a rounding (details).
Do not produce object	If you do not want to produce a continuous rectangular cavity, but to place it on the front panel for information purposes only - for example as a marker - then check this box.

In addition, it is possible to leave rectangular or circular inner areas uncut. The following four combinations are possible here:

•	Rectangle in a rectangle

•	Rectangle in a circle

•	Circle in a circle

•	Circle in arectangle

When you select one of these combinations (example below: "Circle in a rectangle") the respective additional variables will be displayed in the properties dialog box below:

Variable	Property of the uncut rectangular inner area
Width	Width
Height	Height
Radius	Radius of the corners
Offset X	Offset to the reference point in direction X
Offset Y	Offset to the reference point in direction Y

Variable	Property of the uncut circular inner area
Diameter	Diameter
Offset X	Offset to the reference point in direction X
Offset Y	Offset to the reference point in direction Y

The edge machining settings also relate to the edge of the uncut inner area ("island"). Their processing can be disabled in the edge machining dialog box.