Alternative Positioning Points - Dimension Annotation

Exercise 8 Section Planes

11 Dimension Annotation

11.2.1.1 Alternative Positioning Points

Dimensioning to before/after a model element (DPBA) is possible on modification of an existing Dimension via the Vertex Editor and altering the Dimension Point position to BEFORE or AFTER e.g.

AFTER C1101/N13.

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Alternatively, a DPBA can be created via the Command Window using syntax: NEW LDIM followed by FR BEFORE ID @ TO AFTER ID @.

Dimensioning to a specific 3D position (DPOI) is possible on modification of an existing Dimension via the Vertex Editor and altering the Dimension Point position to an explicit co-ordinate.

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Alternatively, a DPOI can be created via the Command Window using syntax: NEW LDIM followed by FR POS @ TO POS @.

Linear Dimension Modification 11.2.2

As introduced earlier in the Chapter, the Properties Grid and associated Vertex Editor facilitate an easy process to modify the properties of the Linear Dimension.

A property may be altered by direct text input such as Projection Line Text…

…or by selection from an options list as found with Dimension Line Terminators.

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By default a number of the Properties will reference the Dimension Visual Style (By Style) and the user should be guarded in overriding these properties if consistency is to be ensured across drawings.

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To modify linear dimensions graphically a series of dimension grips may be utilised in the Draw Canvas.

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Refer to Section 11.1.7 Dimension Grips for further information on the use of general Dimension Grips.

Linear Dimension – A Worked Example 11.2.3

Display Sheet DRWG-FRACTIONATING_COLUMN-C1101/S1.

Before proceeding with the creation of a Linear Dimension, a bespoke Visual Layer is required.

Click the Visual Layers button from the Project group of the Home tab to prompt the Visual Layers form.

Using the Visual Layers form, click the Create New Layer button to add a Visual Layer to the Sheet.

Activate the Name field by a double left-click of the mouse in the grid and rename the created Visual Layer Dimensions.

Click the Apply button and dismiss the Visual Layers form by clicking the Cancel button.

The next preparatory task is to ensure an appropriate Dimension Visual Style is active for the Sheet to ensure adherence to a standard representation.

The required Visual Style is specified by navigating to the Annotate tab and setting the style within the Active Visual Styles group.

Select DIM-TRAINING from the Dimension Visual Style options list.

Before creating the Linear Dimension, ensure View AREA 01 & AREA 03 (PLAN VIEW) is the Current Owner and the newly created Visual Layer Dimensions has been selected via the Active Properties form.

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Remember that the Current Owner may also be selected via the Draw Power Wheel > Navigator or graphically by a double-left click in the required area.

Invoke the Draw Power Wheel with a right-click of the mouse in the Draw Canvas and motion to the Annotate tile to prompt the secondary Annotate Power Wheel before releasing the mouse button.

With a second right-click of the mouse, motion to the Orthogonal Chained tile.

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Alternatively the function may be accessed via the Linear Dimension segmented button in the Annotate group of the Annotate and Home tabs.

On selection of the Linear Dimension the Contextual Editor updates to prompt the specification of the first Dimension Point for the dimension.

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To focus on the area of the View to be dimensioned, prompt the Draw Power Wheel with a right-click and motion to the Zoom Window tile. Following the prompts, select the first and opposite corner of the zoom window as shown below.

The Draw Canvas updates to the zoom area.

Ensuring Object Snap is active in the Draw Status Bar, the first Dimension Point is defined by a click in the Draw Canvas on the required point (element) to be measured from.

If required, the Draw Power Wheel, prompted by a right-click of the mouse combined with pressing the <Shiftt> key, may be used to restrict selection to a specific Object Snap point.

In this example the Dimensions will be created between Structural items.

Select the Item Object Snap so that the Dimension Point will be attached to the structural item identified.

Select Structural Column K1 as the first Dimension Point.

On selection of the first Dimension Point, the Contextual Editor updates to prompt the specification of the second Dimension Point.

Repeat the selection process to select Structural Column K2 as the second Dimension Point.

The Contextual Editor updates to prompt the specification of the Dimension Line position. By cursor pick in the Draw Canvas, select a position as shown below.

On defining the Dimension Line position the Contextual Editor updates to prompt the definition of any additional Dimension Points.

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Continue Dimensioning the Pipe Rack structural columns as shown below with the exception of Structural Column K7.

On defining the required dimension points, select the Finish tile from the Contextual Editor or press the

<Enter> key to complete the dimension.

Select the created Linear Dimension in the Draw Canvas and click the Dimension Position to alter the position of the Dimension line relative to the Dimension Points.

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Note the appearance of the Dimension Point grips as being yellow circles, thus indicating an intelligent connection point.

Select the created Linear Dimension in the Draw Canvas and click the Dimension Addition grip (+ icon) to add a new Dimension Point for connection.

Select the omitted Structural Column K7.

Turning the focus to the Properties Grid, navigate to the Projection Line Type property and alter via the associated options list to Chained.

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The altering of the Projection Line Type from By Style will result in the Visual Style Projection Line Type not being reflected in this dimension instance.

Navigate to the property Projection Line Text and input the intelligent text ~C #POS(C1:8).

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Note: truncated Position attribute is used here to present Easting as an alternative to #POSE which resolves to the Position End of the Structural Section.

Alter the Projection Line Text Justification to Towards.

The created Linear Dimension now has a representation as follows.

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Click the Vertex Editor button on the Properties Grid to prompt the Vertex Editor form.

Select Vertex 8 (Ppline 0 of K1 proportion 0.5) and note the highlighting of the Dimension Point in the Draw Canvas.

Explore the Selected Vertex Properties Grid before navigating to the Position property.

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This example serves to highlight the ability in AVEVA E3D Draw to define a specific P-line attachment and proportional distance for structural elements.

Alter the P-Line attachment for the Dimension Point to the structural Neutral Axis (NA).

Dismiss the Vertex Editor form by clicking the OK button and Save Work.

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Remember a Save Work can be achieved through <Ctrl+S>, the Save button in the Quick Access Toolbar and via the Draw Power Wheel (<ctrl> and right-click).

Angular Dimensions 11.3

An Angular Dimension (ADIM) is defined by a sequence of Dimension Points in an arc arrangement and is formed by the definition of the following Properties.

 Dimension Position Considered to be the centre or origin of the Dimension. It is the point from which the angular dimension directions will radiate.

 Dimension Point Defines the element to be dimensioned and may be defined by an Object Snap point. An Angular Dimension must contain at least two dimension points.

 Dimension Line An indicating arc between Dimension Points, usually accompanied by Dimension Text defining identified measurement.

The Dimension Line may be further defined by Terminators and representation i.e. colour and line style. Dimension Line Sense is implied by order of definition of the Dimension Points.

Likewise the Dimension Text may be defined by representation properties angle, colour, font and height.

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 Projection Line An indicating line radiating from the Dimension Position to each Dimension Point, linking to the Dimension Line at an Offset and Direction as defined by the user.

An accompanying Projection Line Text can be utilised to indicate the dimensioned element. This is aided by the use of Intelligent Text definitions whereby the element name is intrinsically linked to the output text i.e. the annotation will reflect the element name regardless of any alterations in Model.

The Overshoot property defines the distance the Projection Line extends past the Dimension Line.

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The values shown in the dimension text are taken directly from the 3D Design model. If the elements associated with the dimension points are moved in Model, the dimension can be updated automatically by selecting Update > Drawing > Annotation.

There are three Angular Dimension modes: chained, combined and baseline.

Chained Baseline Combined

Creating Angular Dimensions 11.3.1

Before creating the Angular Dimension, the user should ensure the Current Owner is defined in the Sheet (required View or Region) and, if appropriate, a suitable Visual Layer has been selected via the Active Properties form.

All Angular Dimension modes may be accessed via the Angular Dimension segmented button in the Annotate group of the Annotate and Home tabs.

Alternatively, the Draw Power Wheel may be utilised to access the Annotate Power Wheel and, in turn, allow selection of common Angular Dimension modes.

On selection of the required Angular Dimension the Contextual Editor updates to prompt the user to specify the Dimension Position of the dimension.

At this point the Contextual Editor menu offers the opportunity to renege on the current dimension mode and define an alternative Type.

Selecting the Type tile updates the Context Editor to prompt the user to select the required Angular Dimension type.

The Dimension Position is defined by a click in the Draw Canvas at the required point (element) that is to be used as the centre point for the dimension.

Utilising Object Snapping an element may be selected in the Draw Canvas; for example filtering the pick to Element or P-Point – feedback is provided through the cursor snap icon.

On selection of the Dimension Position, the Contextual Editor updates to prompt the user to select a Dimension Point or Direction.

Selecting the Direction tile from the Contextual Editor menu allows the user to define a dimension direction or sense i.e. Clockwise or Anticlockwise.

However, this step is not immediately necessary as the direction of the dimension is implied by the order of Dimension Point picks.

Continuing with the location of a Dimension Point and utilising Object Snapping an element may be selected in the Draw Canvas. The selected element is highlighted and named on positioning the cursor.

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On selection of the first Dimension Point, the Contextual Editor updates to prompt the user to select a second Dimension Point.

The selection process is repeated together with visual feedback in the Draw Canvas indicating the relative position of the selected points.

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Dynamic Hints may be used to indicate the intended angle prior to selection.

On selection of the second Dimension Point the Contextual Editor updates to prompt the user to specify the Dimension Line Position by cursor pick in the Draw Canvas.

On defining the Dimension Line position, the Contextual Editor updates to prompt the definition of any additional Dimension Points.

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On specification of the required dimension points, the Finish tile from the Contextual Editor or the

<Enter> key is selected to complete the dimension.

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The Dimension and associated Dimension Points can be seen in the Draw Explorer below the single administrative LAYE element for the View.

Angular Dimension Modification 11.3.2

As previously described, the Properties Grid and associated Vertex Editor facilitate an easy process to modify the properties of the Angular Dimension.

To modify Angular Dimensions graphically a series of dimension grips may be utilised in the Draw Canvas.

In addition to general dimension grips, an angular dimension has the following specific grip.

 Dimension Position Grip

Selection of the Dimension Position grip allows modification to the origin position of the Angular Dimension.

The appearance of the grip is linked to whether the dimension is intelligently linked to the modelled element; crucial in ensuring the dimension reflects the current state of the model.

A yellow circular grip indicates the Dimension Point has snapped to an intelligent object point such as a P-Point or Element. A blue square grip indicates the Dimension Point is not connected to a model element.

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Refer to Section 11.1.7 Dimension Grips for further information on the use of general grips.

Angular Dimension – A Worked Example 11.3.3

Display Sheet DRWG-FRACTIONATING_COLUMN-C1101/S1.

Before proceeding with the creation of an Angular Dimension ensure an appropriate Dimension Visual Style is active for the Sheet to ensure adherence to a standard representation.

The required Visual Style is specified by navigating to the Annotate tab and setting the style within the Active Visual Styles group.

Select DIM-TRAINING from the Dimension Visual Style options list.

In document TM-1830 AVEVA Everything3D™ (1.1) Draw Rev 1.0 (Page 185-200)