Deviation Analysis

Steps

1. From a Sketch or Part Studio, click the Show analysis tools () in the bottom right corner of the interface.

2. From the menu, select Deviation analysis to open the dialog:

   

3. With Chain 1 selected in the dialog, select one or more adjacent curves in the graphics area.

4. Select Chain 2 in the dialog and select one or more adjacent curves in the graphics area.

   The minimum (blue) and maximum (red) deviations are displayed in the graphics area, along with corresponding extrema points:

   

   Example showing the Max/Min deviation between two curves.

   

   Example showing the Max/Min curve deviation between chained curves in a fillet (Chain 1) and an extruded curve (Chain 2).

5. Optionally, adjust the Scale slider to move the Min and Max measurement labels in the graphics area. Adjusting the slider to the left moves the labels inward toward the selected curves. Moving the slider to the right moves the labels outward away from the selected curves.

Curve deviation calculation

If the selected chains have coincident endpoints, the deviation is calculated on the full length of both chains.

If the selected chains do not have coincident endpoints, the endpoints of the selected chains are paired based on the lower minimum distance value between them.

Curve deviation is calculated as follows:

1. For each pair of endpoints:

   1. The minimum distance of each endpoint to the other chain is calculated.

   2. The range for the deviation computation is trimmed, using the intersection point of the lowest minimum distance value.

   3. The maximum and minimum deviation is computed for that range.

All 3 images display the same set of curves. The minimum distance is displayed in bold orange in the top image. The trimmed curves can be easily seen in the second image (the top curve at right end and bottom curve at left end). The bottom image displays the maximum and minimum deviation computed for the range outlined in the top two images.

Notes

• The curves selected for each chain must be continuous.

• If there are multiple extrema points with the same max or min deviation value between the chains, only one is displayed.

• If you select exactly 2 curves, and then open the Curve deviation dialog, the first selected curve is automatically placed in the Chain 1 field, and second selected curve in the Chain 2 field, automatically calculating the min/max deviation between both curves.

Steps

1. From a Part Studio, click the Show analysis tools () in the bottom right corner of the interface.

2. From the menu, select Deviation analysis to open the dialog:

   

3. Select Surface:

   

4. With Source selected in the dialog, select a surface in the graphics area.

5. Select a surface To measure in the graphics area.

6. The minimum (blue line) and maximum (red line) deviations are displayed in the graphics area, along with corresponding extrema points. The surface being measured also displays a color scale, from dark blue (least deviation) to bright yellow (most deviation):

   

7. Optionally, if either of the Min or Max values are negative, click Absolute values to make them positive. See Surface deviation calculation.

8. Optionally, adjust the Scale slider to move the Min and Max measurement labels in the graphics area. Adjusting the slider to the left moves the labels inward toward the selected surfaces. Moving the slider to the right moves the labels outward away from the selected surfaces.

Surface color scale and legend

When results are loaded for a surface deviation analysis, the color scale and results appear at the top of the graphics area. The six tick marks along the bottom of the color band indicate the magnitude of deviation at each different hue:

Hover your mouse anywhere over the legend. When the cursor becomes a hand icon (), you can drag and drop the scale to dock it to any side of the graphics area.

Click the Colors field to select a deviation color legend:

• Viridis - Ranges from dark blue (least deviation) to bright yellow (most deviation), with cyan and green in the middle range. This is the default scale.

• Blue → Red - Ranges from light blue (least deviation) to dark red (most deviation).

• Plasma - Ranges from dark blue (least deviation) to bright yellow (most deviation), with purple and pink in the middle range.

• Rainbow - Uses all values in the color spectrum; ranges from blue (least deviation) to Red (most deviation).

The lower (minimum) and upper (maximum) deviation values can be adjusted by the user to raise the minimum or lower the maximum values. Click the value and a field opens to enter the new value. Alternately, click and drag the minimum value upward or the maximum value downward.

An asterisk (*) is used to indicate that the original value was edited. Click the Reset button () to return to the original value:

Minimum deviation value being adjusted upward from 3.758 (first image) to 4.45 (second image). Clicking the lower limit value and then the Reset icon (third image) resets the minimum deviation back to 3.758 (fourth image).

With Min/Max values that are adjusted, clicking the Dim color scale colors only the upper (brown) and lower (pink) values in the surface being measured:

Surface deviation calculation

Surface deviation calculation is similar to the Curve calculation, except:

• Deviation is measured between 2 surfaces only, (Source) and (To measure). Multiple surfaces or surface chains cannot be calculated.

• Surface calculation is single-sided. Depending on where the To measure surface is located with respect to the Source surface, the Min/Max values may be negative. Enable the Absolute values checkbox to adjust these values to positive:

  

  Example showing a negative Min value (-16.48 in)

  

  Enabling Absolute values adjusts the negative Min value to be positive (13.375 in)