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

#### Measuring Features Using a Vision probe

You can specify the measurement method to use by selecting it from the Target Type list in the Hit Targets tab. Depending on your feature type, there are up to three methods of taking a feature measurement using a Vision probe:

The following examples use a circle feature.

Method 1 – Gage Hit Target: The Gage Hit Target manual method requires you to graphically size (or adjust) the feature (in this case a circle) and position it to match the feature on the Live View tab of the Graphics Display window. You can also view the image is within the tolerance bands. For a circle, this will give an X, Y position and the diameter. Parameters for this mode are discussed in the "Gage Hit Target Feature Parameters" topic.

Method 2 – Manual Hit Target: The Manual Hit Target method requires you to position a specified number of points around the feature (in this case a circle). PC-DMIS Vision then uses these points to calculate the feature. Any number of targets can be used to aid in measuring the feature. Parameters for this mode are discussed in the "Manual Hit Target Feature Parameters" topic.

Method 3 – Automatic Hit Target: The Automatic Hit Target method uses image processing to automatically detect a feature (in this case a circle). It then calculates the circle based on the defined targets. Parameters for this mode are discussed in the "Automatic Target Feature Parameters" topic.

Method 4 – Optical Comparator Hit Target: The Optical Comparator Hit Target mode uses an upper and lower tolerance band for target measurement. During feature execution, you visually inspect that the feature lies within this tolerance band. From the Execution Mode Options dialog box, you can then click Continue (PASS) or Skip (FAIL) to accept or reject the feature. Parameters for this mode are discussed in the "Optical Comparator Hit Target - Edge Parameter Set" topic.