Difference between revisions of "VTube-LASER End Point Deviations"

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(→‎How to Understand the End Point Deviations)
(→‎BEFORE-TRIM Deviations)
 
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== Three Main End Point Deviations ==
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== Three Types of End Point Deviations ==
  
 
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There are three main end point deviation values calculated during an alignment of the MEASURED to the MASTER tube.<br><br>
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There are three types of end point deviation values calculated during an alignment of the MEASURED to the MASTER tube.<br><br>
 
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The end length deviations are found at the top of the Inspection menu.
 
The end length deviations are found at the top of the Inspection menu.
 
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These are found in the first T1 value and the last T2 value in the Tangents grid.
 
These are found in the first T1 value and the last T2 value in the Tangents grid.
 
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====3D Length Deviations ====
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=Typical Industry Tangent Point Tolerances=
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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:
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These are found in the Intersection grid values.
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====Aerospace and Automative Fluid Lines====
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The 3D deviations represent for the first and the last points represent the total radial deviation between the MASTER and the MEASURED end points in this alignment orientation.
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Diameter Range
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Envelope Tolerance
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[[image:vtl before-trim deviations.png|700px]]
 
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12.7 mm (0.5 inch) diameter tubes or less
 
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+/- 1 mm (0.039 inches)
 
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Greater than 12.7 mm (0.5 inch) 
 
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+/- 2 mm (0.078 inches)
 
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====Automotive Exhaust Pipes====
 
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Diameter Range
 
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Envelope Tolerance
 
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50 mm to 76 mm
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From +/- 2 mm to +/- 3 mm
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76 mm to 102 mm 
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+/- 3 mm
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Larger then 102 mm
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+/- 3 mm or greater
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====Shipbuilding====
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Diameter Range
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Envelope Tolerance
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All Diameters
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+/- 6 mm
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====HVAC====
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Diameter Range
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Envelope Tolerance
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All Diameters
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+/- 2 to +/- 3 mm
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====Structural Tubes (Frames)====
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Diameter Range
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Envelope Tolerance
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All Diameters
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+/- 2 to +/- 3 mm
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====Tighter Tolerances====
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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.
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[[image:aerospace_envelope_tolerance.png|400px]]<br>
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[[image:exhaust_envelope_tolerance.png|400px]]<br>
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[[image:shipbuilding_envelope_tolerance.png|400px]]<br>
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=Other Pages=
 
=Other Pages=
  
 
* See also [[VTube Intersection Point Tolerances]]
 
* See also [[VTube Intersection Point Tolerances]]
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* [[What are Centerline Tangent Points and Why Are They Important in VTube-LASER?]]
 +
* About [[VTube Intersection Point Tolerances]]
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* About [[VTube End Length Offsets]]
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* [[The Limitations of Qualifying Tube Shapes using Bender Data]]
 
* Back to [[VTube-LASER]]
 
* Back to [[VTube-LASER]]

Latest revision as of 02:09, 31 July 2020

Vtube-laser logo 1.96.png This page describes how to find the END POINT deviations.

Vtl screen hd scanner without logo.png


Contents

Three Types of End Point Deviations

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

Vtl three end point deviations.png

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.

Vtl end length deviations.png

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.

Vtl after-trim deviations.png


3D Length Deviations

These are found in the Intersection grid values.

The 3D deviations represent for the first and the last points represent the total radial deviation between the MASTER and the MEASURED end points in this alignment orientation.

Vtl before-trim deviations.png




Other Pages

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