Selecting Arc Radii
Selecting arc radii on a piece of tubing can be difficult since the arcs are not visible in the default view. (What is "default view"?)
To make the arcs visible, select Smooth with Edges from the render mode drop-down menu on the 3D Document toolbar.
See Working with Views.
***Render mode menu
***two examples of rendering - one Smooth with Edges enabled
Selecting an Incorrect Arc
If you select an arc by mistake, you must stop then restart your current measurement or the results may not be correct.
An effective workaround is to measure shorter lengths and then export these length values in the Tube Length Bill of Materials and use Excel add up the data. Shorter measurement errors are more tolerable to redo (i.e., reselecting four or five arcs is more managable than reselecting 50 arcs).See Tube Length Bill of Materials.
Also, make sure 180-degree bends are split so measurement .....
Known Limitations
Glen: Are these limitations still true?
180-Degree Bends
Because the Tube Length function depends on arc radii dimensions for its calculations, an arc radius must be defined within the bend itself. Without this ??, measurement results are inaccurate.
Angled-Cut Tubes
The length of tubes consisting of a vertical cut on one end and an angled cut on the other cannot be measured accurately.