Video Inspection Software User’s Guide
Setting the Number of Points Captured by Multipoint Probes The M3 software provides control of video edge detection point density for multipoint probes through the Stitch Spacing setting found in the Video Settings screen. Stitch spacing is defined as the number of pixels between video edge detection points collected and has a default setting of 10. Fewer pixels between points increases the number of points captured. Adjust stitch spacing to control the number of points collected for a feature of a given size. When more points are desired for a given feature, decrease the stitch spacing. When fewer points are desired, increase the stitch spacing value. To change the value of stitch spacing, navigate to the Stitch Spacing data field in the Video Settings screen and enter the desired value. M3 System menu > Settings menu > Video button > Stitch spacing data field CAUTION The default value of 10 pixels between data points is adequate for most applications. Significantly increasing the pixel space between data points can reduce the accuracy of feature measurements. Increasing or decreasing the point spacing can also affect the reliability of the measure logic probe. It is more difficult for the measure logic probe to make feature determinations when the spacing is too large, and the measure logic tool will follow an edge less effectively if the spacing is too small. Using Video Probes Effectively The section describes the effective use of the M3 video probes that make use of automatic edge detection. These probes include: • Active crosshair • Vtouch • MeasureLogic • EyeMeasure Regardless of edge contrast or form characteristic, the standard crosshair can always be used to enter points by lining the crosshair intersection up with the desired edge and entering points manually. The probe concepts discussed here apply to the use and behavior of probes in either the non-programmatic (interactive) mode, or in the program edit mode. Probe behavior in program playback will be discussed later in the section. This probe discussion includes: • Terms and functions that govern the performance and behavior of the M3 video probes • Six inspection examples from typical vision inspection applications that will demonstrate the use and applicability of probe terms and functions Video Probe Terms and Functions The following terms define many of the functions that govern the performance and behavior of video edge detection probes: • Vtouch active crosshair • Auto teach MeasureLogic • Manual teach MeasureLogic • Buffer zone EyeMeasure
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