Example Wireframe View of Cylinder Scan Using Pitch

#### [Basic Scan] Tab

The [Basic Scan] tab is actually the main tab for each BASICSCAN feature. It is one of these tabs:

- The Circle tab

- The Cylinder tab

- The Axis tab

- The Center tab

- The Line tab

Items found on these tabs include:

Dialog Box Item | Description
#,X,Y,Z columns | # - Displays the points used to generate the scan. These include Start Point, Direction Point, End Point, and Centroid.

- Start Point: Used with AXIS, CENTER, and LINE scans, this point is the start point from which execution will start.

- End Point: Used with AXIS, CENTER, and LINE scans, this point is the end point at which execution will end.

- D: Used with a LINE scan, the Direction Point is used to start the scan and calculate the cut plane. The probe will always remain within the cut plane while doing the scan.

- Centroid: Used with CIRCLE and CYLINDER scans, this point (found in the first list, under the # column) is the center of the circle or cylinder. You can type the center directly or get it from the Machine or CAD. For a cylinder, this is the center from which execution will start.

X,Y,Z - These columns display the coordinates for the item in the # column.

Vector,I,J,K columns | Vector - Displays the type of vector. These include InitVec and CutVec.

- InitVec: Used with all the basic scans, the initial touch vector indicates the surface vector of the first point in the scanning process.

- CutVec: Used with the CIRCLE, CYLINDER, CENTER, and LINE scans, the cut plane vector is the cross product of the InitVec and the line between the start and end point. If there is no end point, the line between the start point and direction point is used.

- EndVec: Used with the LINE scan, the end vector is the approach vector at the end point of the scan.

- DirVec: Used with the LINE scan, the direction vector is the vector from the start point to the direction point.

I,J,K - Displays the IJK vector information for the vector.

Surface Thick box | Used with all the basic scans, this box allows you to input part thickness. PC-DMIS will apply this material thickness automatically when using CAD surface data. This thickness will be applied along the surface normal vector when FINDNOMS mode is selected and PC-DMIS pierces the CAD surfaces to get the nominals.
Control Points button | Used with the LINE scan, this button displays a Control Points dialog box. This dialog box contains controls with similarities to the Control Points tab. See "Control Points Tab" to find equivalent documentation for the Control Points dialog box. This button will only appear if you are using a continuous contact probe (analog probe), such as the SP600, and you can select it once you've defined the Start, Direction and End Points of the LINE scan.

Type list | This defines the type of CIRCLE, CYLINDER, or CENTER scan to perform. When used with CIRCLE and CYLINDER scans, this switches between:

- IN: Defines the scan as a hole

- OUT: Defines the scan as a stud

- PLANE: A plane circle is executed on the plane the circle is lying on.

When used with CENTER scans, this switches between available centering methods:

- Axis: The Start Point (S) is projected on the defined Axis (A). The resulting point is (SP). The InitVec is projected in the plane defined by the Projected point (SP) and the axial direction (A). The direction (N) thus defined is vertical to the axial direction. Thereafter, as centering is performed, the probe’s center point remains in the plane defined by the axial direction and (SP). Centering takes with / against the direction (N) as an input, and the probe tip is free in the direction defined by the axial direction (A) crossing the direction (N).

S = Start Point
A = Defined Axis / Axial direction
SP = Projected Start Point
N = Direction vertical to the axial direction

- Plane: After probing the point defined by the Start Point, the CMM centers with/against the probe direction while remaining free in the plane defined by the CutVec.

Diameter box | Used with the CIRCLE or CYLINDER scans, this is the diameter value of the feature to scan.
Conical check box | Used with CIRCLE scans, this check box lets you scan more quickly when not perpendicular to the part surface. PC-DMIS continues to monitor the probe force as needed.
Start Angle box | Used with a CIRCLE scan, this defines the start angle (in degrees to scan ) from the start point. Both positive angles and negative angles can be used. Positive angles are considered counterclockwise and negative angles are considered clockwise. The CutVec is considered the axis about which the angle rotates.
End Angle box | Used with a CIRCLE scan, this is the same as the Start Angle box except it defines the ending angle. With Start and End Angles you can define a specific portion of a hole or stud to scan.
Angle box | Used with the CYLINDER scan, this defines how far around the cylinder to scan. For example, if you type 360, it will scan one complete revolutions; if you type 720, it will scan two revolutions, and so forth.
Depth box | Used with the CIRCLE and CYLINDER scans, this is the depth applied against the CutVec direction. Both positive and negative values can be used.
Pitch box | Used with the CYLINDER scan, the Pitch box defines the distance between threads along the axis of the feature. This allows your scan to move in a spiral-like fashion along the cylinder.