Line Projection

In this Task

• This drawing shows a front and side view of a pump flange.
• Points will be projected from the existing sketch to create new edges for the right hand view.

Associated Tasks

• Extending a line to another to form 90°
• Using Polar coordinates to draw to specific lengths and angles.
• Exploding a polyline.

Before you Start

• Extended Ortho and Vertex snap modes are required. Right click onto the Snap tab and activate. Make sure Snap tab is activated.
• ‘Model’ layer is current.
• Pan the drawing to the left of the screen.

Take Note

• The sketch profile of the side view will be drawn using a polyline which will be exploded to create individual line segments.
• During the drawing of the polyline an incorrectly drawn segment can be corrected by using the local menu (right click) and selecting one step back.
• Menu options for the Default menu and workspace, the Ribbon and Palettes are provided directly under the Command Name heading.

 

Projecting lines using Extended Ortho

Right click on SNAP or GEO tab, | activate Extended Ortho | activate Magnetic Point & Auxiliary Lines

This snap mode is useful for drawing to a projected orthogonal point of geometry, such as a vertex, intersection etc.

Select the Polyline tool from menu options above, then activate the Snap tab at the base of the graphics editor. Hover the cursor over the corner vertex as shown below by the arrow until the extendedortho magnetic attraction marker and the auxiliarylines, shown by the pointer are visible.

Position cursor over the point shown by arrow, move to the right when projection lines are displayed.

Left click to start the Polyline from this point, then position the cursor over the intersection of the circle shown below left. This will indicate the intersection point from which to project the new line. Do not left click this position.

Next, move the cursor so it is at 90° to the first point, shown below.

Position the cursor on this intersection. Do not left click.

Move the cursor here, hold down the SHIFT key. Left click.

Polar Coordinates

Ribbon : Modes | Coordinates

Default Menu : Modes | Coord System

Palette : Coord System

To determine points of reference in the graphics editor, usually for specifying distances or angles, it is necessary to use either an Absolute or Relative coordinate input method.Coordinate entry is also used for relocating objects in the graphics editor by specifying a destination point which is relative in coordinate measurement to the source point.

Spatial information is input according to either a Polar or Rectangular coordinate system. Rectangular coordinates are also referred to as Cartesian coordinates.

To draw to the next vertex, TAB to the data fields and input 66 into the Length field and 0 in the Angle field. Press Enter. The result is shown below.

Next, position the cursor over the intersection shown below left to indicate the next point from which to project. Do not left click.

Move the cursor to the position indicated below right, holding down the SHIFT key to maintain 90°

Position the cursor at this intersection, do not left click.

Move the cursor here, hold down the SHIFT key. Left click.

To draw the next segment, TAB to the data fields and input 17 into the Length field and 0 into the Angle field. The result is shown below.

Position the cursor in the position to that shown by the intersection marker shown by the x to indicate the next point from which to project from, then align the cursor to 90° so that it is in the position shown by the cursor below. Left click to define this point.

Draw the next segment by using the TAB key to access the data field an inputting 17 into the Length field and 180 into the Angle field, shown below.

Project the next point using the extended ortho and intersection snap modes shown below.

Draw the next line segment by inputting 39 into the Length field and 180 into the Angle field to produce the line segment shown below.

Project the next line segment to the extended orthogonal point shown below left, the connect the last segment to the original vertex start point. Right click and select Finish from the local menu.

Extend to this orthogonal point…

… then connect to the start point using the vertex snap mode.

 

Explode

Ribbon : Modify | Format | Explode

Default Menu : Modify | Explode

SHIFT-ALT-E

The Explode tool reduces a compound entity to its individual components. For example, a rectangle, when exploded comprises 4 single lines instead of a single entity.

Select the Explode tool from the Modify pull-down menu, then select the newly drawn Polyline. This will create separate but connected line segments. 

Shrink / Extend Line

Ribbon : Modify | 2D Modifications | Shrink/Extend Line

Default Menu : Modify | Shrink/Extend Line

Palette : Modify | Modify | Shrink/Extend Line

This modification tool shortens or lengthens a line to a boundary edge.The planar integrity of the modified line is maintained.

Extend the vertical lines shown by the top pointers to the horizontal line shown by the bottom pointers. The result is shown below.