![datum feature symbol datum feature symbol](http://app-help.vectorworks.net/2016/eng/VW2016_Guide/Dimensions/DF_datum.png)
Definition of a Datum Reference Frame.Datums vs Datum Features and Datum Targets.Īccordingly, How many points are needed to establish a plane? Two distinct planes perpendicular to the same line must be parallel to each other. Two distinct lines perpendicular to the same plane must be parallel to each other.
![datum feature symbol datum feature symbol](http://ps-2.kev009.com/CATIA-B18/cfyugdr_C2/images/DatumFeature.gif)
A line is either parallel to a plane, intersects it at a single point, or is contained in the plane. Ĭonsequently, What are three type of points determine a plane? - Two distinct planes are either parallel or they intersect in a line.
#Datum feature symbol plus#
Spherical geometry: planes are for Euclidean planes containing the origin,and Euclidean spheres for which the square of the radius is one plus the square of the distance from.Euclidean geometry: planes have equations (with not all zero).What is the minimum number of points for a plane?.How many points are required to define a plane?.In June we will be releasing Creo Parametric 4.0: Working with 3D Annotations and Model Based Definition, where you can learn more about the creation and usage of Datum Feature Symbols and other model annotations. Using the above steps, you should be able to replace your legacy Datum Tags with Datum Feature Symbols to convert your older models to Creo Parametric 4.0. Finally, just check any GTOLS that referenced the Set Datum you cleared to ensure it picked up the correct Datum Feature Symbol, as shown.In the Datum dialog box, click (Unset) as shown. Select the set datum, right click and select Properties.Create a new (Datum Feature Symbol) with the same name as the Set Datum.Note that for Datum Tag Annotations, right-clicking and selecting Change Reference will automatically complete the Convert operation.ĭatum Feature Symbols can not be placed on a datum plane or datum axis, so once you convert the annotations, for any Set Datum, a new Datum Feature Symbol needs to be created and the legacy set datum tag needs to be unset. Right-click and select Change Reference to establish a new reference for each Datum Tag Annotation you have converted.Convert all outdated GTOLs and dimensions by selecting an annotation, right-clicking and selecting Convert All.Note the icon indicating the outdated annotations in the Detail Tree shown. Scenario 1: (Set Datum Tag annotation) On a Plane or Axis as the associativity between the legacy datums and GTOLs may be lost in certain scenarios. Unfortunately, simply completing the conversion operation doesn't solve the problem. You can select an annotation in the Detail Tree, right-click and select either the Convert or Convert All option to convert outdated GTOLs and dimensions to the modern annotation types, as shown. It is important to note that the Set Datums may also be referenced by Geometric Tolerances, so you will have to manage that circumstance as well.
#Datum feature symbol update#
So when you open a model created in Creo Parametric 3.0 or earlier, you have to update the existing Set Datums to Datum Feature Symbols. Now, Datum Feature Symbols must be associated with solid geometry. Prior to Creo Parametric 4.0, Set Datums were derived from existing datum planes or axes.
![datum feature symbol datum feature symbol](http://gdtseminars.com/wp-content/uploads/2010/05/blog11.png)