VTube-LASER End Point Deviations

This page describes how to find the END POINT deviations. Back to VTube-LASER

Three Main End Point Deviations

There are three main end point deviation values calculated during an alignment of the MEASURED to the MASTER tube.

END LENGTH Deviations

The end length deviations are found at the top of the Inspection menu. These deviations show you how much to trim a part to make it fit within the current alignment better.

AFTER-TRIM Deviations

These are found in the first T1 value and the last T2 value in the Tangents grid. These deviations show the expected radial deviation if the tube were trimmed.

Typical Industry Tangent Point Tolerances

In working with thousands of customers over the past few decades, we've seen some trends in accepted envelope deviation tolerances. Here are what we commonly see: Aerospace and Automative Fluid Lines Diameter Range Envelope Tolerance 12.7 mm (0.5 inch) diameter tubes or less +/- 1 mm (0.039 inches) Greater than 12.7 mm (0.5 inch) +/- 2 mm (0.078 inches) Automotive Exhaust Pipes Diameter Range Envelope Tolerance 50 mm to 76 mm From +/- 2 mm to +/- 3 mm 76 mm to 102 mm +/- 3 mm Larger then 102 mm +/- 3 mm or greater Shipbuilding Diameter Range Envelope Tolerance All Diameters +/- 6 mm HVAC Diameter Range Envelope Tolerance All Diameters +/- 2 to +/- 3 mm Structural Tubes (Frames) Diameter Range Envelope Tolerance All Diameters +/- 2 to +/- 3 mm Tighter Tolerances Sometimes customers will required +/-0.75 mm - but this is very rare. We've never seen tube shapes that must be qualified with a deviation tolerance of less than +/- 0.75 mm.

Other Pages

• See also VTube Intersection Point Tolerances
• Back to VTube-LASER