#### Hit Target Focus Parameter Set

To change a value, right click on the current value for the desired target. If a value says N/A, then that parameter is “not applicable” to the current set. Adjustments to the focus parameter set can be made for Automatic, Manual, Gage, and Optical Comparator Hit targets.

ID: This displays a unique identifier for the item in the target list. This same ID is used on the ToolTip for the target in the Live View tab of the Graphics Display window.

Focus: This determines whether or not the target requires a pre-edge detection focus.

Note: When using the CAD++ configuration, an AUTO option in addition to the standard YES/NO will only do a focus if the image appears to require one.

Control (Focus): Choose either AUTO or FULL. AUTO mode will use the calibrated focus information to automatically set the range and duration parameters. FULL mode will allow the user to set the range and duration manually.

Range (Focus): This displays the range from the camera to the part. It specifies the distance (in the current units) over which to perform the focus. Using this value the machine searches in the Z direction for the best focal position.

Duration (Focus): This displays the number of seconds to spend searching for the best focal position.

Important: If your Range and Duration combination results are too fast when you do a focus, you will see a warning message overlaid on the Live View.

Find Surface (Focus): This displays a YES or NO. Setting this option to YES will cause PC-DMIS to perform a second, slightly slower, pass-to attempt to improve the accuracy of the focal position. The second pass is optimized based on the image data of the first pass and the Numeric Aperture of the current lens. This is useful when measuring a surface that varies in height, requiring a large range to over which to focus.

Surface Variance (Focus): With the Find Surface option set to YES, this value is used to determine the distance that will be initially scanned at a fast speed to find where the part is, and then the normal focus will be done around this area. Once the focal position is found, PC-DMIS will do a quick focus scan in that region. This is useful for parts where variability means the focus position can vary a lot.

Assist (Focus): This is used with systems with a laser or Projected Grid device. These devices can be switched to "ON" to assist with the focus on certain surfaces by improving the contrast. Set this option to "GRID" to enable this functionality.

Illumination-Adjust: This determines whether or not the machine should perform an auto-light adjust prior to focus, in an attempt to achieve optimal focus result. If set to NO, PC-DMIS will set lighting according to the learned percentage and the brightness will not be adjusted automatically.

Measure At Centre: If selected, will do the measurement at the center of the Field Of View for improved accuracy.