To Create Datum Points (basic)

The following procedure explains how to create datum points using model geometry.

1. Choose Datum > Point or click the point button on the datums toolbar.

2. Choose one of the following options from the DATUM POINT menu:

   On Surface-Create a datum point on a surface. Dimension the datum point from two planes or edges. Datum points created using this option can be patterned. You can select the locating dimensions to establish pattern direction. If you create a datum point on a surface that belongs to a quilt, the point references the whole quilt rather than the particular surface on which it was created.

   Offset Surf-Create a datum point offset in a specified direction from a surface at a specified distance from two referenced placement planes or edges.

   Curve X Srf-Create a datum point at the intersection of a curve and a surface. The curve can be a part edge, surface feature edge, datum curve, axis, or an imported datum curve. The surface can be a part surface, surface feature, or datum plane.

The system creates the datum point at the location at which the surface and the curve intersect that is closest to the "pick" used to select the curve. The system "remembers" the initial pick location on the curve, not on the surface. For example, if you modify the angle used to place a datum plane, Pro/ENGINEER places the point at the nearest corresponding intersection of the curve and planar surface.

   On Vertex-Create a datum point on the vertex of a part edge, surface feature edge, datum curve, or imported wireframe.

   Offset Csys-Create a datum point array at an offset from one or more coordinate systems.

Note: You can only change the array of one or more datum points created using Offset Csys by using the Redefine command.

   Three Srf-Create a datum point at the intersection of three surfaces. Each surface can be a part surface, surface feature, or datum plane.

   At Center-Create a datum point at the center of an arc, circle, or elliptic entity

   On Curve-Create a datum point on an edge or curve with a parameter value for its location that references the length along the curve from one of its vertices.

   Crv X Crv-Create a datum point on one curve that is located where it is the minimum distance to another curve. The curves do not need to intersect.

   Offset Point-Create one or more datum points at an offset from a point or vertex.

Choose Done from the DTM PNT MODE menu.

3. Select the necessary entities to constrain the location of the point.

Notes:

   In certain cases, you cannot individually select multiple datum points created as a single feature. In these cases, Pro/ENGINEER does not allow you to pick the points.

   You can also create datum points in the Sketcher.

See Also