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. You can make adjustments to the focus parameter set 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 Vision tab of the Graphic Display window.
Focus: This determines whether or not the target requires a pre-edge detection focus.
When using the CAD++ configuration, an AUTO option in addition to the standard YES/NO only does a focus if the image appears to require one.
Control (Focus): Choose either AUTO or FULL. AUTO mode uses the calibrated focus information to automatically set the range and duration parameters. FULL mode allows 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.
If your Range and Duration combination results are too fast when you do a focus, a warning message appears and is overlaid on the Vision tab.
Find Surface (Focus): This displays a YES or NO. Setting this option to YES causes PC-DMIS to perform a second and 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, which requires a large range over which to focus.
Surface Variance (Focus): With the Find Surface option set to YES, this value determines the distance that is initially scanned at a fast speed to find where the part is, and then the normal focus is done around this area. Once the focal position is found, PC-DMIS does 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 option is used with systems with a laser or Projected Grid device. These devices can be switched 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 option determines whether or not the machine should perform an auto-light adjust prior to focus in an attempt to achieve optimal focus result. If it is set to NO, PC-DMIS sets the lighting according to the learned percentage, and the brightness is not adjusted automatically.
Measure At Centre: If selected, the measurement occurs at the center of the Field Of View for improved accuracy.