2. click datum point > sketch.
3. The Sketch Datum Point dialog box with one element opens:-Sketch datum curve.
4. Use the Set Sketch Plane and Set Plane menus to set the sketch plane.
5. Use the sketch view menu to set the sketch view. The sketch menu appears on the top menu bar.
6. click sketch > points.
7. Draw the required points and mark them. Click Finish to exit Sketcher.
8. click OK in the Sketch Datum Point dialog box.
Note: When you create a sketched datum point, you can treat any sketched geometry as construction geometry. The following steps explain how to create datum points using model geometry.
1. select "insert" >; "benchmark" > point or click the point button on the benchmark toolbar.
2. Select any of the following options from the Datum Point menu:
-On the surface-
Creates a datum point on a surface. Mark datum points from two planes or two edges. Datum points created with this option can be patterned. Positioning dimensions can be selected to determine the array direction. If you create a datum point on a surface that belongs to a quilt, the point refers to the entire quilt, not the specific surface that created the point.
-Offset surface-
In the specified direction, the datum offset is created by the surface, and the specified offset value is the distance between two reference position planes or edges.
-curve x surface-
Create datum points at the intersection of curves and surfaces. Curves can be part edges, surface feature edges, datum curves, axes or input datum curves. A surface can be a part surface, a surface feature or a datum plane.
The system creates a datum point, and the intersection of the surface and the curve is closest to the selected position of the selected curve. The system "records" the initial selected position on the curve, not the position on the surface. For example, if you modify the angle at which the datum plane is placed, Pro/ENGINEER will place the datum point at the nearest corresponding intersection of the curve and the plane surface.
-At the apex-
Creates a datum point on the vertex of a part edge, surface feature edge, datum curve or input box.
-Offset coordinate system-
Creates a datum point array at a position offset from one or more coordinate systems.
Note: You can only use the Redefine command to change one or more datum point arrays created with an offset coordinate system.
Three surfaces
Creates a datum point at the intersection of three surfaces. Each surface can be a part surface, a surface feature or a datum plane.
other
-At Center-Creates a datum point at the center of an arc, circle, or ellipse entity.
-On Curve-Creates a datum point on the curve or edge with the position of the parameter value, which refers to the length along the curve from the vertex.
-Curve x Curve-Creates a datum point on the curve closest to another curve. These two curves need not intersect.
-Offset Point-Creates one or more datum points at a distance from a point or vertex.
Select Done from the Benchmark Mode menu.
3. Select the primitives required for the constraint point position.
To annotate ...
A in some cases, the created datum points cannot be selected as a single feature. In this case, Pro/ENGINEER is not allowed to select these points.
B. you can also create datum points in the sketcher. 1. select "benchmark" >; "point" > "offset coordinate system".
2.Pro/ENGINEER displays the Point Array menu with the following options:
-Belt size-
Creates an array of parameter datum points that can contain up to 100 points.
-No size-
Create a set of nonparametric datum points. The system does not specify names or modifiable sizes for the points in the array. It is recommended to use this point when there are many points.
3. Select Set Coordinate System to select or create a coordinate system. The Get Coordinate System menu appears. Select Select from the Name list menu to select an existing coordinate system or select Create to create a new coordinate system.
4. Set the coordinate system type by selecting Descartes, Cylinders or Spheres from the Set Coordinate System Type menu.
5. Select any of the following options in the Datum Array menu: input point, edit point or read point.
6. If necessary, repeat steps 3 to 5 to set a new coordinate system and specify more points.
7. After the operation is completed, select Done. The system displays the datum plane name in yellow and its mark in white.
Note: Select Modify from the Part menu and select a point in the pattern to modify the pattern.
Create offset datum points
With the Offset Point option, first specify the offset direction, and then select another point (datum point, vertex or coordinate) from which the new datum point will be offset, thus creating a datum point.
1. Select the offset point from the datum menu.
2. Use one of the following options in the Offset Direction menu to choose how to specify the offset direction:
-Solid/Edge-The offset direction is along a straight edge, axis or straight curve.
-Plane Normal-The offset direction is perpendicular to the plane.
-2 points—Specify the offset direction with a straight line passing through two points (two vertices, points or coordinate system).
-Coordinate System-Offset the axis along the coordinate system.
3. Choose a suitable reference for the direction of the new point.
4. Select the point to offset. When finished, select Finish Selection.
5. Enter the offset distance along the display direction (if you select a coordinate system, you will be prompted to enter the offset distance along each axis in turn). A negative value will produce an offset in the opposite direction.
Create datum points immediately.
1. When a point must be created during feature creation, just select an option from the Datum menu.
2. If the Point option is selected, the Datum Mode menu will appear with the following options:
-add—create new Datum Points in the feature, select an option from the datum point menu, and then follow the system prompts to locate these points.
Note: For the current main feature, the Datum Point menu only displays valid options for creating datum points.
-Change-Change the position of an existing datum point. Select the point to change, select an option from the Datum Point menu, and then define the point in the normal way.
-delete—Deletes the selected datum point from the feature.
3. after creating the required points of complete parts, select "benchmark mode" >; After "finish" is created, the system automatically selects all new points to operate.