SpaceClaim Online Help

Datum targets

Use the  DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. TargetThe object you want to cut, when using the Combine tool to split a solid or surface. tool in the DetailAspects of a design incorporated to communicate with others or submit the design for review. Use the tools on the Detailing tab to annotate designs, create drawing sheets, and review design changes. You can customize detailing settings to conform to standards or create your own custom style. tab Annotations group to create datum targets in your design, drawing sheet, or 3D markupA document type that enables you to annotate and compare different versions of a design. slide. As shown below, you can insert the following datum target types:

• PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle.
• Circular Area
• AxisStraight line that an object rotates around or that objects are regularly arranged around. See Alignment axis. (cylindrical or conical only)
• LineA straight line, arc, or spline drawn in Sketch mode or on a layout plane. Lines have length but no area. When you pull a sketch into 3D with the Pull tool, lines become edges.
• Rectangular area

The top field of a datum target is the dimension (target area size or the diameter of the datum target point); the bottom field is the reference letter (target identifying letter), as shown in the image below:

When you create a datum target, by default, the datum callout height ratio is 3.5. This setting controls how many times the current text height the callout circle size should be, for example, the setting of 3.5x is for ASMEAmerican Society of Mechanical Engineers standards for engineering drawing practices. You can customize the style of your annotations to conform to ASME standards. See ISO, JIS, and ISOInternational Organization for Standardization standards for architectural and engineering drawing, including guidelines for dimensioning and tolerancing. You can customize the style of your annotations to conform to ISO standards. See ASME, JIS. and ISOInternational Organization for Standardization standards for architectural and engineering drawing, including guidelines for dimensioning and tolerancing. You can customize the style of your annotations to conform to ISO standards. See ASME, JIS.-based models use a 4x setting.>

To insert a datum target

1. Select the DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. TargetThe object you want to cut, when using the Combine tool to split a solid or surface. tool.

2. In the Options panelArea of the user interface that enables you to modify functions specific to tools., choose the target type.

   • PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle.

   • Circular area

   • Rectangular area

   • LineA straight line, arc, or spline drawn in Sketch mode or on a layout plane. Lines have length but no area. When you pull a sketch into 3D with the Pull tool, lines become edges.

   • AxisStraight line that an object rotates around or that objects are regularly arranged around. See Alignment axis.

1. Hover over the faces of your design to preview the eligible annotation planes.

2. MoveA tool used to translate or rotate geometry. the cursor to where you want to place the target.

3. Click and drag the target leader to a position inside or outside the annotation plane.

4. Click the top field to enter (or to change an existing) number or letter for the callout, as shown in the image set below:

    

To edit a Datum Target:

DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. targets have three components. You can change the properties of each in the Properties panelArea of the user interface that displays editable details about the selected object(s). This panel is initially displayed on the lower left side of the screen, but can be moved..

• With a callout selected, you can change the following properties:
  • Hidden - True or False
  • Layout2D drawing mode that is most useful when you have no immediate need to generate 3D objects from the lines in the layout. If you try to pull layout lines to 3D, they do not behave the same way that sketched lines do. Think of a layout as a pencil drawing made on your design. When you are ready to use your layout to create geometry, you must project the layout lines to a sketch. Projecting a layout line to a sketch is like inking the line. You can import a 2D AutoCAD DXF or DWG file as a layout. - If Number of Callouts is greater than 1, they can be stacked Top, Bottom, Left, or Right.
  • Number of Callouts - Greater than or equal to 1
  • Text Height - Based on model units
  • Text Position - Inside or Outside the callout
• With a leader selected, you can change the following properties:
  • Arrow Style - Choose from the drop-down list of available styles.
  • Arrow Length - Choose the Default or enter a value in model units.
  • Arrow Width - Choose the Default or enter a value in model units.
• With a target selected, the available properties depend on the type of target.
  • PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle.
    • Type - Choose from PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle., Circular, or Rectangular.
    • PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle. Size - Enter a value in model units.
  • Circular area
    • Type - Choose from PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle., Circular, or Rectangular.
    • Radius - Enter a value in model units.
    • Rotation - Enter a number of degrees to rotate the circle.
    • Hatch Angle - Enter a number in degrees.
    • Hatch Spacing - Enter a number in model units.
• Rectangular area
  • Type - Choose from PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle., Circular, or Rectangular.
  • Width - Enter a number in model units.
  • Height - Enter a number in model units.
  • Rotation - Enter a number of degrees to rotate the rectangle.
  • Hatch Angle - Enter a number in degrees.
  • Hatch Spacing - Enter a number in model units.
• LineA straight line, arc, or spline drawn in Sketch mode or on a layout plane. Lines have length but no area. When you pull a sketch into 3D with the Pull tool, lines become edges.
  • Length - Enter a number in model units.
  • PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle. Size - Enter a number in model units.
  • Rotation - Enter a number of degrees to rotate the line.
  • Show Points - True or False
• AxisStraight line that an object rotates around or that objects are regularly arranged around. See Alignment axis.
  • PointSingle location in the sketch grid. 2-D object that has no height, width, or length. The origin, an axis, and a vertex are examples of points. Use the Point tool to sketch a point on the sketch grid. Points are useful as a dimensional reference, for splitting, and for creating a point on a line or curve through which you want to draw a three-point circle. Size - Enter a number in model units.
  • Rotation - Enter a number of degrees to rotate the line the point and leader attachment locations.
  • Show Points - True or False

You can change default settings for datum callouts and targets from the Annotation group in General SpaceClaim Options.

• Showdatum target end points: Checkbox to control whether or not datum target lines should show their end points.

• DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. Callout text height ratio: Controls how many times larger the callout circle should be compared to the text height.

• DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. TargetThe object you want to cut, when using the Combine tool to split a solid or surface. default point size: Controls the point size used by datum target points, lines, and circles. Default point size can be overridden on a per object basis.

• DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. TargetThe object you want to cut, when using the Combine tool to split a solid or surface. area default hatch spacing: Controls the hatch spacing for circular and rectangular datum targets. Default spacing can be overridden on a per object basis.

• DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. TargetThe object you want to cut, when using the Combine tool to split a solid or surface. area default hatch angle: Controls the hatch angle for circular and rectangular datum targets. The default angle can be overridden on a per object basis.

• DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. callout leader arrow shape: Controls the arrow shape of leaders connected to datum targets.

• Linestyle options:
  • Set line style and thickness for DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. target area borders
  • Set line style and thickness for DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. target area lines

Dimensioning datum targets

You can dimension in the following ways:

• To or from the circular area of a datum.
• To or from the center of a rectangular datum or any of its edges.
• To the endpoints of a datum target line or the entire line.
• The diameter of a datum target axis by clicking on the circle.
• From each point of the datum target axis.

Assembly considerations

DatumObject that is assumed to be an exact size and shape, and be in an exact location, that is used to locate or establish geometric relationship of other objects. targets only appear in the root document of the current design window. If they appeared in the component itself, they would be shown in every occurrence of the component in an assembly. Having them in the root document of the design window provides flexibility and prevents multiple, unnecessary duplicates.

For example, in a table with four legs, each leg is the same component, but each leg in the table assembly may need a different datum target, or no target at all. See the image below.