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

## Performing a Line Basic Scan

BASICSCAN dialog box - Line tab

The Insert | Scan | Line menu option will scan the surface along a line. This scan needs three points, a Start Point, a Direction Point, and an End Point. It uses the starting and ending point for the line, and uses the direction point to calculate the cut plane. The probe will always remain within the cut plane while doing the scan.

The LINE scan also uses the following vectors for execution:

- InitVec: The initial touch vector indicates the surface vector of the first point in the scanning process.

- CutVec: 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: The end vector is the approach vector at the end point of the line scan.

- DirVec: The direction vector is the vector from the start point to the direction point.

The cut vector is the cross product of the initial touch vector and the line between the start and end point.

To Define a Basic Line Scan:

1. Click the Start Point from the # column and either double-click on it to type in a value or click on the CAD model to select a point from the selected surface.

2. Click the Direction Point from the # column and either double-click on it to type in a value or click on the CAD model to select a point from the selected surface.

3. Click the End Point from the # column and either double-click on it to type in a value or click on the CAD model to select a point from the selected surface.

4. Modify the vectors as needed.

5. Fill out any other tabs as needed on the dialog box and click OK. PC-DMIS inserts the LINE scan into the Edit window.

The Edit window command line for a Line Basic Scan reads:

ID =BASICSCAN/LINE,ShowHits=YES,ShowAllParams= YES
startx,starty,startz,endx,endy,endz,CutVec=i,j,k, DirVec=i,j,k
InitVec=i,j,k, EndVec=i,j,k, thickness