Page 304 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Length : Specifies the length to be added to the polyline in the current direction.

Undo : Undoes the previous spline segment as with the line command.
Width : Specifies the width of the next polyline segments. Can be tapered.
Polyline with arcs
Polyline with width 125
Tapered width polyline

Tapered width arc polyline
Convert pline to spline (Fig 6)

Fig 6

1 Draw A Pline
2 Type PEDIT to edit the polyline as a spline.

3 Choose Draw, Spline
4 Type Object at the command prompt.
5 Click Once on the polyline to turn it into a spline.
Spline (Fig 7)

The spline command creates a particular type of spline known as a non uniform rational B-spline (NURBS) curve.
A NURBS curve produces a smooth curve between control points.

Fig 7

1 Choose Draws, spline.

(or)
2 Click The spline icon
(or)
3 Type Spline at the command prompt Command: Spline
4 Pick A start point for the spline Object /<Enter first point> (pick point)

5 Pick Points until you are done drawing splines Enter point: (pick points)
6 Press Enter or close to complete the spline
7 Pick Starting tangent point for the spline Enter start tangent (pick point)
8 Pick Ending tangent point for the spline

Enter end tangent (pick point)

291
CITS : Engineering Drawing (Mechanical) - Exercise 12