Video Inspection Software User’s Guide
Section 12: Field of View (FOV)
Field of view systems perform measurements on parts located entirely within a fixed video field of view. Feature dimensions and locations are determined by the pixel resolution of the video system. Measurement activities are automatically recorded as part programs in all M3 systems. Part programs can be played back manually or automatically without the need for part registration measurements performed by the user. Programs can measure single or multiple identical parts placed within the field of view. M3 Measurement and Other Functions Part measurement sessions can include measuring features, constructing features, applying tolerances, reporting results and other activities. The probes, user interface screens and other M3 functions described earlier in this guide serve as a reference for field of view system operation. Please familiarize yourself with M3 functions before proceeding. Discussions in the remainder of this section assume a basic working knowledge of the M3 system. Functions unique to field of view systems A few important functions are unique to field of view systems: • Auto Play • Program Finder • Motion Monitoring
NOTE Program finder can also be used in non-FOV systems, but not in conjunction with the Auto Play feature.
Auto Play Field of view measurement sessions can be as simple as a quick diameter check, or can include a coordinate system, tolerances, markups, reports and other M3 functions. More complex measurement sessions usually begin with a datum pattern measurement of a part. The datum pattern registers the part and when the completed program is played back using Auto Play, the pattern is recognized and part registration operations by the user are unnecessary. Automatic program playback is only provided by the Auto Play function when Auto Play recognizes the part pattern and the program is contained in the Program Finder list. Program Finder When Auto Play is not enabled, the user performs a pattern measurement on a part and when the part is contained in the Program Finder list, the program is loaded. The user can then simply run the program. When Auto Play is enabled, the program is played automatically. Only programs contained in the Program Finder list can be loaded or played automatically. Program Finder lists can contain many programs for widely varying parts. Programs can be added to or deleted from the Program Finder list at the user's discretion. Auto Play Use of the Program Finder When a part is placed in the field of view, if its part program was registered with the pattern, Auto Play recognizes the pattern and looks for the corresponding part file in the Program Finder list. If the program is in the list, the part file and the associated runs database are loaded. The program is then played automatically.
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