Video Inspection Software User’s Guide
Section 4: Measuring, Constructing and Creating Features
Measurements can be performed on manual and CNC enabled systems using single point video, multipoint video or touch probes. Measurements can be performed explicitly using any probe or automatically using the MeasureLogic or EyeMeasure probes. Blobs must be measured explicitly using a special tool. The measurement of blobs is a special case discussed later in this section. Additional measurement tools are provided for FOV systems. FOV systems are discussed in detail in Section 12: Field of View Functions. NOTES Most measurement, construction and feature creation concepts discussed in this section apply equally well to encoder-based moveable stage systems and fixed stage FOV systems. However, some of the material in this section will not apply to FOV systems, such as material regarding CNC control or encoder-based positioning and location. Measurements in FOV systems occur only in a fixed position field of view and are based on video pixel resolution. Touch probes are provided only as an option on CNC systems.
Measurement activities can include: • Measuring features by probing • Constructing features •
Creating new features based on data provided by the user
Users can perform quick checks of individual part features without establishing a reference frame or can establish a reference frame including a part level, part skew and zero datum in preparation for formal measurements that will be compared to part drawings and be recorded as a part program. Explicit and Automatic Measurement Explicit feature measurements are always performed by pressing the desired Measure Feature button and then probing at least a minimum number of required points on the feature’s edge. Features measured with the MeasureLogic or EyeMeasure tool can be measured explicitly or can be measured automatically by allowing the M3 software to determine the feature type based on the data points collected. Touch probe measurements are always explicit. Feature Constructions Feature constructions are performed explicitly by pressing the desired Measure Feature button and then selecting the parent features from the Feature List or from the Part View that will be used for the construction. When the feature construction is complete the resulting construction will be added to the Feature List and Part View. Feature Creation Features are created by pressing the desired Measure Feature button, pressing the associated Create Feature button and entering the desired feature parameter data into the fields provided.
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