Difference between revisions of "Using a Datum to Get Print Dimensions"

How to Use Datums To Get Print Dimensions

This is a sample print with the design intent of checking the width and the height. You can use the VTube-LASER DATUM feature to get to these dimensions.

The diameter of this part is 1.25 inches. You will need to find the X centerline dimension by subtracting 1.25 from 5.5. So - the X dimension should be 5.5 - 1.25 = 4.25.

Set the datum using the Datum tab in the MASTER DATA menu.

After a measure and alignment, use one of the Datum reports in the report menu to show the dimensions.

In this example, the two X values show the dimensions that correspond to the 5.5 dimension.

The distance values in the report will be distances from the datums that you set in the Datum tab menu in the Master part.

For example if the tube is a perfect shape, then the X3 and X4 distances should be "4.25" (either positive or negative depending on your master tube's orientation in VTube.) In this example, the X3 value is short by 0.023" along the X axis. Since the Xdev (deviation) number is green, it is within the tolerance that was previously set in the Inspection menu.