GD&T > Evaluate Callouts (functional when a reference object exists with at least one GD&T View sub-object, as created by GD&T > Create Callouts) - for every callout in a GD&T View, this function analyzes whether the test object differs from the reference object within specified tolerances, and stores the results in a GD&T View sub-object under the test object.
Note: Evaluate Callouts operates on a local copy of the Test and Reference objects and their datums, so adding or deleting datums, or changing the alphabetic identifier of datums on the Test and Reference objects does not have the expected effect on Evaluate Callouts. Make all such changes before using GD&T > Create Callouts.
For each callout in the GD&T View, evaluation details appear in an annotation and in a table at the bottom of the Viewing Area. Details include:
Callout name
Callout type, like “Flatness” or “Cylindricity”
Tolerance
Measured value - The measured value displayed in the annotation is the actual value of the callout, minus the bonus tolerance if any (with a minimum value of 0). The measured value is:
(for flatness, cylindricity, and total runout callouts) - the width of the actual tolerance zone including all the points of the sample (with outliers removed).
(for position callouts) - the minimum diameter of a cylinder at the true position and orientation containing the extreme points of the measured axis segment.
(for “orientation” callouts (Perpendicularity, Parallelism, and Angularity)) when the considered feature is a cylinder - the minimum width of a cylinder at the true orientation containing the extreme points of the measured axis segment.
(for “orientation” callouts when the considered feature is a plane - the larger of:
the minimum width of a slab at the true orientation containing the extreme points of the measured plane.
the width of the actual tolerance zone including all the points of the sample (with outliers removed).
(for surface profile callouts)1 - twice the distance from the center of the tolerance zone to the furthest measured point (with outliers removed). In other words, this is the minimum width of an zone which is symmetric about the center of the tolerance zone and includes all the measured points (with outliers removed). The tolerance zone itself may be unequally disposed.
# Points - the total number of points in the test sample.
# Outliers - the number of points that are ignored (not counted in the #Passed or #Failed values)
# Passed - the number of points that lie within the tolerance zone (even if the Callout fails)
# Failed - the number of points that lie outside the tolerance zone.
Min. value - the smallest (signed) value on the color detail map (with outliers removed). (It's the maximum negative value in the Callout (except when Type is Surface Profile or Position).
Max. value - the largest (signed) value on the color detail map (with outliers removed). (It's the maximum positive value in the Callout (except when Type is Surface Profile or Position).
Bonus tolerance - the possible additional tolerance, when Material Condition is M or L. This tolerance can be non-zero only for Position and “orientation” callouts.
Notes
- (blank, “SEP REQT”, or “Current Alignment”) - supplemental information:
blank - indicates that the DRF evaluation is standard and that all
callouts with the identical DRF were evaluated simultaneously.
“SEP REQT” indicates that this callout was created as a Separate Requirement.
“Current Alignment” indicates that this callout was evaluated with
the current alignment.
Result - pass/fail status of this callout. A Callout passes if the Measured Value is less than the Tolerance value.
The controls are:
Perform Correspondence Alignment (Best Fit) checkbox - specifies whether to align the test and reference objects immediately before performing this evaluation. When checked, the following are selectable (and are mutually exclusive):
Check Symmetry checkbox - whether to consider all orientations exhaustively.
Fine Adjust Only checkbox - specifies that objects are already roughly aligned. This prevents exhaustive re-orientation of the objects and/or saves processing time.
View Control group - specifies the GD&T View N sub-object whose callouts are to be evaluated. For details on the View Control group, see Managing Views.
Display Mode group - specifies the display properties of evaluated callouts.
Go/No Go radio button - whether to paint the point sample green or red (to indicate pass or fail).
Color Detail radio button - whether to illustrate the evaluation of the point sample with colors from the deviation spectrum. In this mode, ignored points or polygons appear gray. Colors usually represent signed distances in the normal direction, measured from the reference surface that is properly aligned per the datum reference frame (for surface profile and position callouts). In other cases, distances are measured from an offset of the properly aligned reference surface.
View DRF Alignment
dropdown (includes the name of every callout that has a DRF, plus “Current”,
plus “Best Fit”.) - adjusts the method by which the test and reference
objects will line up with each other in the Viewing Area. No re-evaluation
takes place, just a re-display of the test object.
a callout name - the Viewing Area will display the test object in
the alignment that was used to evaluate that callout.
“Current” - the Viewing Area will display the test object in its
current alignment (the orientation that existed when the test and reference
object were aligned in space).
“Best Fit” - the Viewing Area will display the best-fit alignment
of the test and reference objects.
Edit Spectrum checkbox (applicable in Color Detail mode) - allows modification of the color coding scheme in the Viewing Area. See All About Spectrums. The default values of Max. Positive, Min. Positive, Min. Negative, and Max. Negative are derived from the Tolerance value(s) and the distribution of distances in the Callout(s) in the Viewing Area. There is one spectrum per GD&T View, so if the spectrum is not appropriate for all the Callout results in the GD&T View, you should define some Callouts in separate GD&T Views.
Display Selection Only checkbox (applicable when the test object is a point object) - displays only those points which correspond to the Callout(s) in the Viewing Area.
List of Callouts - is a list of the callouts that appear in all GD&T View N sub-objects. The buttons allow picking and choosing of callouts. Another method of selecting one or more callouts is to click a name, shift-click, and control-click.
Select All button - selects all callouts in all GD&T Views (even though you cannot see all the GD&T Views).
Select In View button - selects all callouts in the currently visible GD&T View.
Clear All button - un-selects all callouts.
Tolerance Zone group - These controls affect the callout that is selected in the Viewing Area. A selected callout has a yellow feature control frame.
Outlier Percentage field - specifies the percentage of points that may lie outside the tolerance zone and be ignored during evaluation. This applies only after the use (if any) of Modify Selection. This does not affect the pass or failure of some callouts, like a callout for the position of a cylinder.
Modify Selection checkbox - activates two methods of eliminating “problem areas” from the evaluation. After using one of the methods below, un-check this checkbox to regenerate the results and re-apply the Outlier Percentage.
Use of the Selection Tools to un-select and re-select portions of the evaluated region(s) - Use the standard selection tools (such as the rectangle, ellipse, or lasso) with the Ctrl key to un-select a portion of the considered region. Use the selection tools without the Ctrl key to re-select a portion of the considered region.
Boundary Offset field - specifies a distance to “shrink” the set of considered points from the borders of the CAD face of the considered feature of the active callout. The offset is a distance from the edge of the CAD face. Use this to eliminate points that are close to the edges and which do not belong to the considered feature. This tool might not give expected results if the test object differs from the reference object greatly.
OK button - saves the results of evaluations to one or more GD&T View sub-objects, and closes the dialog.
Cancel button - closes the dialog without saving applied evaluations.
Apply button - The first time the dialog appears, Apply causes all callouts in all GD&T Views to be evaluated, and those evaluations to be placed under the test object in the model manager. If evaluations already exist under the test object in the model manager, Apply re-evaluates the callouts that are selected in the List of Callouts and applies any new Display Mode that may have been configured.