Video Inspection Software User’s Guide
3 Probe a minimum of three points evenly distributed across the surface of the part. Probing more than three points increases the accuracy of the measurement. 4 Press the Done button to complete the measurement and enter the datum plane into the Feature List. Measure toolbar > Done button NOTE Previously measured or constructed plane features can also be leveled by manually zeroing the theta angle coefficient and the Z position coefficient. Pressing the label buttons to the left of these coefficients in either the feature detail screen or the DRO viewports will set the corresponding values to zero. Skew alignment When a part is misaligned (twisted) in the XY plane, small cosine errors can be generated during the measurement process. These errors can be eliminated by creating a skew alignment for the part. The skew alignment performs a precise measurement of the part of misalignment in the XY plane. Once the misalignment is known to the system, subsequent feature measurements are automatically compensated to eliminate cosine errors. Measurement data in the feature detail screen and DRO viewports will reflect measurements of a perfectly aligned part.
To create a skew alignment: 1 Select the desired probe from the probe menu.
Measure toolbar > Probe menu > Desired probe
2 Press the Skew button of the Datum menu.
Measure toolbar > Datum menu > Skew button
3 Probe a minimum of two points well distributed along the entire length of the desired part reference edge. 4 Press the Done button to complete the measurement and enter the skew line into the Feature List. Measure toolbar > Done button
NOTE Previously measured or constructed features can also be used to perform a skew alignment by manually zeroing the theta angle coefficient and the X or Y axis coefficient. Pressing the label buttons to the left of these coefficients in either the Feature Detail screen or the DRO viewport will set the corresponding values to zero. Datum Creation Creating the part datum point (origin) is the final step in establishing a valid reference frame for subsequent measurements. The part datum can be created by: • Probing a single point • Constructing a point from one or more parent features • Manually zeroing the X and Y coefficients of a feature
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