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Cad Drawing - Curves-1

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  CURVES 1.   Arcs    The Arc command allows you to draw an arc of a circle. Toolbar : Draw Menu Bar : Draw    Arc  3Points   Command Line : ARC   (shortcut)   A   Procedure : Command: ARC Specify start point of arc or [Center]: (pick P1)  Specify second point of arc or [Center/End]: (pick P2)  Specify end point of arc: (pick P3)   Procedure : Command: ARC Specify start point of arc or [Center]: C  Specify second point of arc or [Center/End]: (pick P1)  Specify end point of arc: (pick P2)  Specify endpoint of arc or [Angle/Chord/Length]: (pick P3) 2.   Circles    The Circle command is used to draw circles. Toolbar : Draw Menu Bar : Draw    Circle  Center, Radius   Command Line : CIRCLE   (shortcut)   C   Procedure : Command: CIRCLE Specify center point for a circle or [3P/2P/Ttr tan tan radius)]: (pick P1) Specify radius of circle or [Diameter] <5.0000>: (pick P2 or enter the exact radius) 3.   Ellipses    Ellipse Command    The Ellipse command gives you a number of different creation options. The default option is to pick the two end points of an axis and then a third point to define the eccentricity of the ellipse.      The Ellipse command can also be used to draw isometric circles.   Toolbar : Draw Menu Bar : Draw    Ellipse  Axis, End   Command Line : ELLIPSE (shortcut) EL Procedure : Command: ELLIPSE Specify axis endpoint of ellipse or [Arc/Center]: (pick P1) Specify other endpoint of axis: (pick P2) Specify distance to other axis or [Rotation]: (pick P3)       Ellipse Arc Command    The Ellipse Arc command is very similar to the Ellipse command, described above. The only difference is that, in addition to specifying the two axis end points and the “distance to other axis” point, you are prompted for a start and end angle for the arc.   Toolbar : Draw Menu Bar : Draw    Ellipse Arc   Command Line : ELLIPS  E A (shortcut)  EL   A Procedure : Command: ELLIPSE Specify axis endpoint of ellipse or [Arc/Center]: A Specify axis endpoint of elliptical arc or [Center]: (pick P1) Specify other endpoint of axis: (pick P2) Specify distance to other axis or [Rotation]: (pick P3) Specify start angle or [Parameter]: 270 Specify end angle or [Parameter/Included angle]: 90 4.   Splines    The Spline command creates a type of spline known as a nonuniform rational B-spline, NURBS for short. A spline is a smooth curve that is fitted along a number of control points.   Toolbar : Draw Menu Bar : Draw    Spline   Command Line : SPLINE   (shortcut)   SPL   Procedure : Command: SPLINE Specify first point or [Object]: (pick P1) Specify next point: (pick P2) Specify next point or [Close/Fit tolerance] <start tangent>: (pick P3) Specify next point or [Close/Fit tolerance] <start tangent>: (pick P4)  Specify next point or [Close/Fit tolerance] <start tangent>:   Specify start tangent: (pick a point) Specify end tangent: (pick a point) 5.   Donuts    This command draws a solid donut shape, actually it’s just a closed polyline  consisting of two segments which have been given a width. AutoCAD asks you to define the inside diameter i.e. the diameter of the hole and then outside diameter of the donut.   Toolbar : none   Menu Bar : Draw    Donut   Command Line : DONUT (shortcut) DO Procedure : Command: DONUT  Specify inside diameter of donut <0.5000>: (pick any two points to define a diameter or enter the exact length) Specify outside diameter of donut <1.0000>: (pick any two points to define a diameter or enter the exact length) Specify center of donut or <exit>: (pick P1) Specify center of donut or <exit>:    (to end or continue to pick for more donut)

Simple Truth

Jul 23, 2017
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