AutoCAD 2010/2011/2012

AutoCAD 2010/2011/2012

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JamaL9722060
Posts: 1,360
Registered: ‎04-09-2010
Message 1 of 12 (5,071 Views)
Accepted Solution

How to draw a line perpendicular on an arc at the a particular point?

5071 Views, 11 Replies
04-21-2012 12:06 PM

How to draw a line perpendicular on an arc at the a particular point?

 

I wanted to draw a line perpendicular to an arc at a particular point but couldn’t approach it. In this case, I need two snaps to work at the same time! To be perpendicular on the curve and at the same time to be snapped to the point!

 

What is the best way to draw such line?

 

Thank you for the help

 

Best

 

Jamal

 

Clip_838.jpg

 

 

----------------------------------------------------------
Jamal NUMAN, GIS and Civil Engineer, MSc
e-mail: JamaL9722060@yahoo.com
P.O.Box: 731, Ramallah, West Bank, Palestine.
----------------------------------------------------------
Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.

The Xline entity/command allows for deferred perpendicular.  Create the infinite lines where needed, then trim accordingly.

 

Command: _xline

Specify a point or [Hor/Ver/Ang/Bisect/Offset]: per

to

Specify through point:

Specify through point:

Distinguished Contributor
Exmateria
Posts: 215
Registered: ‎11-19-2008
Message 2 of 12 (5,066 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-21-2012 03:05 PM in reply to: JamaL9722060

See this video



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dbanaszak
Posts: 218
Registered: ‎11-10-2003
Message 3 of 12 (5,056 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-21-2012 07:52 PM in reply to: JamaL9722060

Jamal, draw a line from the CENTER of the ARC to the POINT you want to pass through - it will be perpendicular to the arc, just extend it to the length you need and TRIM what you don't.

Mentor
JamaL9722060
Posts: 1,360
Registered: ‎04-09-2010
Message 4 of 12 (5,040 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-22-2012 01:13 PM in reply to: dbanaszak

 

Thank you guys for the answer.

 

What if the arc is just a curve that doesn’t have a centre! Then how can I draw a line perpendicular to it at a particular point?

 

Best

 

Jamal

 

Clip_842.jpg

----------------------------------------------------------
Jamal NUMAN, GIS and Civil Engineer, MSc
e-mail: JamaL9722060@yahoo.com
P.O.Box: 731, Ramallah, West Bank, Palestine.
----------------------------------------------------------
Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.
*Expert Elite*
Alfred.NESWADBA
Posts: 9,583
Registered: ‎06-29-2007
Message 5 of 12 (5,038 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-22-2012 01:26 PM in reply to: JamaL9722060

Hi,

 

>> What if the arc is just a curve that doesn’t have a centre!

>> Then how can I draw a line perpendicular to it at a particular point?

Also Arcs do have centres, and if you have something like splines remember to constraints :smileywink:

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
-------------------------------------------------------------------------
Mentor
JamaL9722060
Posts: 1,360
Registered: ‎04-09-2010
Message 6 of 12 (5,037 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-22-2012 01:50 PM in reply to: Alfred.NESWADBA

Many thanks Alfred for the answer.

 

Sounds that the constraints can’t be set between Line and Spline!

 

How then to use the constraints?

 

Best

 

Jamal

 

Clip_844.jpg

 

Clip_845.jpg

----------------------------------------------------------
Jamal NUMAN, GIS and Civil Engineer, MSc
e-mail: JamaL9722060@yahoo.com
P.O.Box: 731, Ramallah, West Bank, Palestine.
----------------------------------------------------------
Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.
*Expert Elite*
Alfred.NESWADBA
Posts: 9,583
Registered: ‎06-29-2007
Message 7 of 12 (5,035 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-22-2012 01:59 PM in reply to: JamaL9722060

Hi,

 

>> Sounds that the constraints can’t be set between Line and Spline!

You're right, I've just learned something, sorry!

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
-------------------------------------------------------------------------
*Expert Elite*
JDMather
Posts: 28,228
Registered: ‎04-20-2006
Message 8 of 12 (5,026 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-22-2012 06:47 PM in reply to: JamaL9722060

 

What if the arc is just a curve  

 


An arc is a special curve - part of a circle and it always has a center.

Your curve is spline - not an arc.

In a modern CAD program like Autodesk Inventor you could right click on the spline curve at the point and select Show Handle.
You could then lock the position of the handle and add a line perpendicular to the handle at the curve point.

 

Perp.png I haven't checked to see if this is possible in AutoCAD or free Inventor Fusion.

Please mark this response as "Accept as Solution" if it answers your question.
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Distinguished Contributor
SEANT61
Posts: 137
Registered: ‎09-23-2008
Message 9 of 12 (5,011 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-23-2012 03:12 AM in reply to: JamaL9722060

The Xline entity/command allows for deferred perpendicular.  Create the infinite lines where needed, then trim accordingly.

 

Command: _xline

Specify a point or [Hor/Ver/Ang/Bisect/Offset]: per

to

Specify through point:

Specify through point:

Distinguished Contributor
dbanaszak
Posts: 218
Registered: ‎11-10-2003
Message 10 of 12 (4,988 Views)

Re: How to draw a line perpendicular on an arc at the a particular point?

04-23-2012 11:20 AM in reply to: JamaL9722060

Thanx Sean, I hadn't noted that functionality with SPLINEs before. Of course, I NEVER use SPLINES.

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