Current Help System: PC-DMIS Laser (View Core Help)

#### Cylinder Specific Parameters

Diameter: The value in this box defines the cylinder’s diameter.

Length: The value in this box provides the length (height) of the cylinder's axis. The length parameter is only valid as nominal. No actual length measurement will be performed.

Inner/Outer: This parameter defines whether or not the cylinder is an inner cylinder (hole) or an outer cylinder (stud).

Important: It is NOT possible to measure a full inner cylinder hole with a laser. You can ONLY measure a half cylinder, such as a cylindrical channel cut into a block (see example below).

Note: The Overscan value on the Laser Scan Properties tab of the Probe Toolbox should use negative values unlike other Laser Auto Features. This limits measurement in the cylindrical region along the cylinder axis.

Depth: This parameter controls location of the laser focal point in relation to the cylinder's outside diameter (outer cylinders) or the cylinder's center axis (inner cylinders). This allows you to control how the laser stripes fall on the cylinder's surface by specifying how far or close the laser is to the cylinder's surface. A depth of 0 will cause this feature to be calculated at the surface plane height, using data found at the lowest possible depth from the surface plane. A depth of any other value will cause it to be calculated at that depth.

The depth defaults to zero. This is the default value for a plane feature with no extruded edges. You should only change this to a different value if there are specific requirements from your part's drawing. Otherwise, PC-DMIS will unsuccessfully attempt to locate points at the specified depth, resulting in a feature calculation error from the feature extraction module.

Sample inner Cylinder showing the depth (blue circle), the length (bottom circle), and the Overscan (yellow circle)