Drafting Techniques

Drafting Techniques

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*Allen Jessup
Message 1 of 4 (436 Views)

AutoCAD Tip: Tangent lines and currves.

436 Views, 3 Replies
11-18-2004 06:22 AM
One ability that AutoCAD has had from it's inception is the ability to draw consecutive tangent lines and curves. By consecutive I mean that the entities must be drawn one after the other. To draw a curve tangent to a line. First draw the line. Then start the arc command. When asked to Specify the start point of the arc hit Enter. You will now be drawing an arc tangent to the line. You can drag it out, enter a chord distance that will be applied in the direction you are dragging or enter an angle override - <90 and then type in the chord distance. unfortunately the angle override is an absolute angle and not in relation to the line. To draw a line tangent to a curve reverse the process. First draw the arc. Then start the line command. When asked to specify the first point hit Enter. Then drag or type in a distance. This also works when drawing 2 curves. Reverse or compound. The above scenarios take advantage of the fact that when asked for the first point on an entity hitting Enter will grab the endpoint of the last entity drawn. Allen Jessup Rockland County Highway Dept. New City, NY http://www.co.rockland.ny.us/Highway/default.htm IBM IntelliStation - 3.2 GHz. - 3GB RAM NVidia Quardro FX 3000 w/256MB RAM Land Desktop 2005
*Tracy W. Lincoln
Message 2 of 4 (436 Views)

Re: AutoCAD Tip: Tangent lines and currves.

11-18-2004 04:41 PM in reply to: *Allen Jessup
Allen, Thank you, for awhile there I thought nobody else had any tips or tricks to post. -- Tracy W. Lincoln, TLConsulting Consulting, Design & Training Specialist Autodesk Discussion Group Facilitator "Allen Jessup" wrote in message news:419caf9a$1_2@newsprd01... > One ability that AutoCAD has had from it's inception is the ability to > draw > consecutive tangent lines and curves. By consecutive I mean that the > entities must be drawn one after the other. > > To draw a curve tangent to a line. First draw the line. Then start the arc > command. When asked to Specify the start point of the arc hit Enter. You > will now be drawing an arc tangent to the line. You can drag it out, enter > a > chord distance that will be applied in the direction you are dragging or > enter an angle override - <90 and then type in the chord distance. > unfortunately the angle override is an absolute angle and not in relation > to > the line. > > To draw a line tangent to a curve reverse the process. First draw the arc. > Then start the line command. When asked to specify the first point hit > Enter. Then drag or type in a distance. > > This also works when drawing 2 curves. Reverse or compound. > > The above scenarios take advantage of the fact that when asked for the > first > point on an entity hitting Enter will grab the endpoint of the last entity > drawn. > > Allen Jessup > Rockland County Highway Dept. > New City, NY > http://www.co.rockland.ny.us/Highway/default.htm > IBM IntelliStation - 3.2 GHz. - 3GB RAM > NVidia Quardro FX 3000 w/256MB RAM > Land Desktop 2005 > >
*Casey Roberts
Message 3 of 4 (436 Views)

Re: AutoCAD Tip: Tangent lines and currves.

11-24-2004 08:13 AM in reply to: *Allen Jessup
Another option is to use a pline and switch between arcs and lines by pressing L or A when prompted for "Allen Jessup" wrote in message news:419caf9a$1_2@newsprd01... > One ability that AutoCAD has had from it's inception is the ability to draw > consecutive tangent lines and curves. By consecutive I mean that the > entities must be drawn one after the other. > > To draw a curve tangent to a line. First draw the line. Then start the arc > command. When asked to Specify the start point of the arc hit Enter. You > will now be drawing an arc tangent to the line. You can drag it out, enter a > chord distance that will be applied in the direction you are dragging or > enter an angle override - <90 and then type in the chord distance. > unfortunately the angle override is an absolute angle and not in relation to > the line. > > To draw a line tangent to a curve reverse the process. First draw the arc. > Then start the line command. When asked to specify the first point hit > Enter. Then drag or type in a distance. > > This also works when drawing 2 curves. Reverse or compound. > > The above scenarios take advantage of the fact that when asked for the first > point on an entity hitting Enter will grab the endpoint of the last entity > drawn. > > Allen Jessup > Rockland County Highway Dept. > New City, NY > http://www.co.rockland.ny.us/Highway/default.htm > IBM IntelliStation - 3.2 GHz. - 3GB RAM > NVidia Quardro FX 3000 w/256MB RAM > Land Desktop 2005 > >
*Allen Jessup
Message 4 of 4 (436 Views)

Re: AutoCAD Tip: Tangent lines and currves.

11-24-2004 12:35 PM in reply to: *Allen Jessup
Works for going from line segment to arcs but not for going from arcs to lines. Also you will have to explode the PLine if you need to create lines. Allen "Casey Roberts" wrote in message news:41a4b2ef_2@newsprd01... > Another option is to use a pline and switch between arcs and lines by > pressing L or A when prompted for > > > "Allen Jessup" wrote in message > news:419caf9a$1_2@newsprd01... > > One ability that AutoCAD has had from it's inception is the ability to > draw > > consecutive tangent lines and curves. By consecutive I mean that the > > entities must be drawn one after the other. > > > > To draw a curve tangent to a line. First draw the line. Then start the arc > > command. When asked to Specify the start point of the arc hit Enter. You > > will now be drawing an arc tangent to the line. You can drag it out, enter > a > > chord distance that will be applied in the direction you are dragging or > > enter an angle override - <90 and then type in the chord distance. > > unfortunately the angle override is an absolute angle and not in relation > to > > the line. > > > > To draw a line tangent to a curve reverse the process. First draw the arc. > > Then start the line command. When asked to specify the first point hit > > Enter. Then drag or type in a distance. > > > > This also works when drawing 2 curves. Reverse or compound. > > > > The above scenarios take advantage of the fact that when asked for the > first > > point on an entity hitting Enter will grab the endpoint of the last entity > > drawn. > > > > Allen Jessup > > Rockland County Highway Dept. > > New City, NY > > http://www.co.rockland.ny.us/Highway/default.htm > > IBM IntelliStation - 3.2 GHz. - 3GB RAM > > NVidia Quardro FX 3000 w/256MB RAM > > Land Desktop 2005 > > > > > >
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