#### 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 (including a 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 the 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 for an internal feature means that the laser probe center is on the cylinder center axis. For an external feature, it is on the surface of the outer cylinder.

- A negative depth value moves the laser probe center away from the cylinder's surface.

- A positive depth value moves the laser probe center closer to the cylinder's surface.

Measure Mode: This list appears if Inner/Outer is set to Out. It lets you further define the measurement mode by choosing either to measure an outer Cylinder or a Stud. In an outer Cylinder, the plane portion is not meaningful and, if present, must be avoided. In a Stud, the measurement of the plane is required. Selecting Stud displays the Center Offset and Search Length measurement properties.

Center Offset: This value identifies the center of the cylinder portion of the stud.

Search Length: This value identifies the length of the cylinder portion.

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)

Sample Stud Cylinder showing the search length (purple circles), the center offset (green line), the search length (purple) and the overscan (yellow circle), and the ring band (pink circles)