#### Exec Controls Area

The options in this area aren't used for all scan types. For example, manual scans only use a few of these options.

Item | Description
The Execute list | This list lets you determine how PC-DMIS will execute a scan after the scan has been learned. Normal - PC-DMIS will execute the scan in its 'normal' manner; it will trigger a hit when the probe touches the part. Example: If a DCC scan is executed, PC-DMIS will take hits at each of the learned locations in stitch scanning mode, storing the newly measured data. The displayed nominals will be the same as when the scan was learned and cannot be re-calculated using a different Nominals mode.

Re-learn - PC-DMIS will execute the scan as though it is learning it. All learned measured data will replace the new measured data. The nominal will be re-calculated depending on the Nominals Mode (see "Nominals Mode").

Example: If a DCC scan is being re-learned, PC-DMIS will relearn the scan from the beginning, instead of taking hits at the learned locations (as it would do in the case of the NORMAL mode).

Defined - PC-DMIS allows the controller to ‘define’ a scan. PC-DMIS gathers all hit locations from the editor and passes them onto the controller for scanning. The controller will then adjust the path allowing the probe to pass through all the points. The data is then reduced according to the increment provided and the new data will replace any old measured data.

When this option is used after Generating the scan Offline, the nominal locations obtained from CAD will be used every time to drive the CMM.

This mode is available only when using analog probe heads that can do continuous contact scanning.

Important: The Defined mode with Perimeter scans does not support hole avoidance. Ensure that there aren't any holes in your scan's pathway with this execution mode; if there are, either adjust your Perimeter scan's path or switch to the Normal execution mode.

ClearPlane check box | The ClearPlane check box inserts a CLEARP MOVE a predetermined distance relative to the current coordinate system and part origin before taking the first hit. After the last point in the scan is measured, the probe will stay at probe depth until called to the next feature. Using clearance planes reduces programming time because the need to define intermediate moves is reduced. (See "Parameter Settings: Clearplane Tab" in the "Setting Your Preferences" chapter for additional information on clearance planes.) This option is only available for DCC scans.
Single Point check box | The Single Point check box considers each hit as a single measured point. If this option is check marked, PC-DMIS will make each hit a measured point and insert it into the part program. This sequence will happen after the manual scan has been reduced. If the scan is in DCC mode, it will take place after the scan has been learned.
Auto Move check box | The Auto Move check box will let you turn on Auto Moves for each scan. Once selected, you can type the distance for the move in the Auto Move box. LINEAROPEN, LINEARCLOSE, PATCH, SECTION, PERIMETER and BASIC SCAN AXIS For these scan types PC-DMIS will

- Generate an automatic move at the distance specified above the scan's start point.

- Run the scan.

- Generate another automatic move at the distance specified above the last scan point.

BASIC SCAN CIRCLE, CYLINDER, and CENTER

For these scan types PC-DMIS will

- Before the scan starts, generate an automatic move above the centroid of the feature at the distance specified.

- Perform the scan

- After the scan ends, generate another automatic move above the centroid of the feature at the distance specified.

Probe Comp check box | The Probe Comp check box allows you to determine whether or not PC-DMIS turns on probe compensation for this specific scan. In most cases you probably don't need to perform this compensation since a scan's FINDNOMS operation automatically does it. However, if you don't have CAD and want to reverse-engineer a part, you should select this check box.
CAD Comp check box | This check box determines whether or not PC-DMIS compensates for each point using the 3D surface vector from the CAD file. If not selected, PC-DMIS uses a 2D cut plane as usual. This check box becomes available for selection if you select FINDNOMS from the list in the Nominals Method area or if you click on the CAD model in the Graphics Display window.
Inner Bound check box | This check box allows you to determine whether or not PC-DMIS will perform an interior or an exterior perimeter scan.

- If selected, PC-DMIS will perform an interior perimeter scan.

- If deselected, PC-DMIS performs an exterior perimeter scan.

For a description of interior or exterior scans see the "Performing a Perimeter Advanced Scan" topic.

Use COP check box | This check box determines whether or not the scanned points also get added to an existing Cloud of Points (COP) command. If you select this check box, you can type the ID for the COP command into which you want to add the newly scanned points. If the COP command doesn't yet exist, PC-DMIS will ask if it should generate it for you.

For information on COP commands, access the PC-DMIS Laser documentation where this command is discussed.