## Performing a Fixed Time / Distance Manual Scan

The Fixed Time / Distance (Variable Delta) method of scanning allows you to reduce the number of hits taken in a scan by specifying the distance the probe must move as well as the time that must pass before additional hits can be accepted by PC-DMIS from the controller.

See the "Common Functions of the Scan Dialog Box" topic of the PC-DMIS Core documentation for information on this tab's other controls.

To Create a Fixed Time / Distance (Variable Delta) Scan:

1. Select the Insert | Scan | Fixed Time / Distance menu option. The VARIABLE DELTA dialog box appears.

VARIABLE DELTA dialog box

2. Specify a custom name for the scan in the ID box, if you don't want to use the default name.

3. In the Time Delay Between Reads box, type the time in seconds that will need to elapse before PC-DMIS takes a hit.

4. In the Distance Between Hits box, type the distance that the probe will need to move before PC-DMIS takes a hit. This is the 3D distance between points. For example, if you 5, and your units of measurement are millimeters, the probe has to move at least 5 mm from the last point before PC-DMIS accepts a hit from the controller.

5. If you're using a CAD model, type a Find Nominals tolerance in the Find Nominals Control area. This defines how far away the actual ball center point can be from the nominal CAD location.

6. Set any other dialog box options as needed.

7. Click Create. PC-DMIS inserts the basic scan.

8. Execute your part program. When PC-DMIS executes the scan, the Execution Options dialog box appears and PC-DMIS waits for data to come from the controller.

9. Manually drag the probe over the surface you want to scan. PC-DMIS checks the amount of time elapsed and the distance the probe moves. Whenever the time and distance exceed the values specified, it will accept a hit from the controller.

Quick Start Manual Scan

| You can also begin execution of a variable scan from the Quick Start interface by clicking the Scan button. You will be prompted to take hits for manual scanning. Once you have completed take scan hits, click Finish to add the manual scan (variable delta) feature to the part program.