The following chapter runs the user through several Vector editing options.
Shield Design Example
- Create a new model with a Height of 20 and width of 20 and a resolution of 1002 x 1002.
- Set the origin to the middle and press OK.
The origin position can be moved by using the option Set model position.
This allows the user to positon the zero datum to the; centre, one of the 4 corners, or a typed coordinate positon.
Vector input by snapping to a Grid
Grids provide snap points to assist in dynamically defining vector points. Grids are controlled from the Bitmaps – Views pulldown menu.
- Select Bitmaps Views Snap Grid settings…
The selected grid spacing value is mainly dependent on the size and complexity of the component to be produced.
- Switch on Draw Snap Grid, switch on Snap to Grid, set the Grid Spacing to 1 and press OK.
- Select create polyline.
- Snap to the same grid points as shown in the illustration.
Note: The best position to Snap in a vector point is just to the lower, left of a grid point.
- Select File è Save As:-
- Select Bitmaps è Views è Snap Grid settings…
- Switch off both Draw Snap Grid and Snap to Grid before pressing OK.
- Select the Fillet command.
The fillet is generated at a node point or from two polylines that would intersect.
- Enter a fillet radius of 5 and select either side of the bottom point to generate the fillet.
- Change the fillet radius to 1 and create a fillet at the top two corners.
- Change the fillet radius to 2.5 and create a fillet at the last two corners.
The main shield vector is as shown.
- Select Close.
- With the Vector selected, select Offset Vector.
- Set an Offset Distance of 0.5, select Inwards and Radiused before selecting the Offset tab and then Close the form.
Vector input by snapping to Guidelines
A constant offset has been generated. For the middle part, instead of using grid lines, instead, guidelines at actual values will be used.
Guidelines are pulled from within the rulers located around the border of the model. For accurate positioning they can be snapped direct to grid points or if the Grid is switched off once created they can be precisely positioned via a Position Guide form
- Hold the left mouse button down within the top ruler and drag down a horizontal guideline, releasing the mouse, when it is near the centre of the model (0 on the vertical ruler).
- Right mouse click on the guideline.
A selected guideline can be accurately positioned by inputting a suitable value in the New position box and pressing the Apply tab.
Note: A selected Guideline can also be deleted via this form.
New Guidelines can be inserted using the options in the lower half of the form.
- Enter a New Position of 0 and press Apply.
- Generate a vertical guideline at 0 by dragging it from within the left ruler.
There are now 2 guidelines in the model. These can be snapped onto when creating or moving vectors or nodes.
These guidelines can be shown or hidden by clicking the guidelines icon.
This is at the top left hand corner of the rulers.
- Select Create polyline.
- Snap on the guidelines to create horizontal and vertical centrelines.
- Pick the top left corner icon in the 2D view to switch off Show Guidelines.
The 2 new polylines will be used to create Offset Copies. With the on both sides option set.
- Offset the horizontal line, vector both sides by 0.5mm using the Both Sides (ridge) option.
- Offset the vertical line, vector both sides by 0.4mm
- Delete the original polylines (if the delete original vectors option was not set during the offset operations).
- Select trim vector and cut the polylines to be within the shield.
The completed vectors for the shield design are as shown.