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1542 views, 1 edit(s), 11463 characters(s) Page last modified 11:19, 5 Mar 2012 by contentconnector

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New Angular Deviation tool

1. Angular Deviation Options
2. An example

This new tool, found under Locators > Deviation > Angular Deviation, lets you check for G1 (tangent) continuity between surfaces, regardless of whether positional continuity has been achieved, and displays angular deviation.

Choose Locators > Deviation > Angular Deviation.
Select the boundaries between two sets of surfaces by clicking them (the pick chooser may appear), or box-selecting them. All the surfaces in a set must be connected. Additionally, if they are tangent continuous, they can be selected all at once by turning on Chain Select.
NoteYou can select surface edges, trim edges, and surface curves.
Click Accept.
A G1 locator is displayed. If tangent continuity is achieved, the locator shows a green T. If it is not achieved, the locator shows a yellow T. You can also display the maximum angular deviation and/or a comb between the surfaces. The tool options are similar to Evaluate > Continuity > Surface Continuity options.

Angular Deviation Options

Check Spacing By: Arc Length - Check the continuity at equally spaced points along the surfaces, determined by the Distance Between Checks option.
# Per Span - Check the continuity at a number of points in each span equal to the value of the Number Per Span option.
Dragging the also lets you interactively change the number of check points.
Show Max. Labels: If this option is selected, points of maximum tangency angle are shown. These labels only appear if part of the boundary has tangent discontinuities that are out of tolerance.
Show Edge Labels: If this option is selected, indicators (labeled "T") showing areas of discontinuities are initially displayed along the boundaries. Red symbols indicate areas of maximum discontinuity. Blue symbols indicate areas of minimum discontinuity.
Show Comb: If this option is selected, comb lines are displayed for tangency breaks.
Auto Scale: This option only appears if Show Comb is selected. When Auto Scale is selected (default), the scale of the deviation combs is automatically calculated to be proportional to the size of the object.
When this option is not selected, a Comb Scale slider appears (see next).
Comb Scale: This slider allows you to set the scale of the comb at the time of creation. It is only available if Auto Scale is not selected.
Dragging the also lets you interactively adjust the comb scale.
Chain Select: If this option is selected, selecting a surface curve also selects all other surface curves that are tangent continuous with it.

An example

Below are two sets of surfaces. The Surface Continuity tool shows that the longer surface fails to achieve positional continuity with its neighbors (top). The Angular Deviation tool can still be used to check tangent continuity and show angular deviation between those surfaces (bottom).

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