Point on Curve
Point on Curve
(OP)
Hi,
I'm using AutoCAD 2012. How do I get a point on curve or arc point on curve or at midpoint?
Thanks
I'm using AutoCAD 2012. How do I get a point on curve or arc point on curve or at midpoint?
Thanks
Jason M.
Unigraphics NX Designer





RE: Point on Curve
I also forgot... How do I make some of the lines & dimes reference lines or reference dims?
Thanks
Jason M.
Unigraphics NX Designer
RE: Point on Curve
If you want to "snap" to a precise point on the curve, you can use the "nea" (for nearest) running object snap. And "end" for end of arc, "mid" for midpoint of arc. If you need to snap to an exact distance along a curve, you can copy the object, change its length as desired with "lengthen" command, snap to endpoint.
RE: Point on Curve
Thanks for replying. I'm simply trying to take the center point of an arc or circle & alight the point onto a line, which I'm using as a center construction line or reference.
Also, I wish to make some line entities &/or dimensions reference. I'm accustomed to using other CAD systems which there is a simple command, such as "Make Reference" & the entity would be converted into a dash line or dimension.
How's this done within AutoCAD 2012?
Thanks
Jason M.
Unigraphics NX Designer
RE: Point on Curve
RE: Point on Curve
Attach a file? I'm asking for AutoCAD 2012 command instructions or options.
I would think that AutoCAD 2012 would have some type of point & align options, change entities to references & number of other features.
Who know where these are & how they work?
Thanks
JM
Engineering Project Manager
RE: Point on Curve
Forgot to mention - These are probably easy commands once known where to be found & how to use.
Thanks
JM
Engineering Project Manager
RE: Point on Curve
RE: Point on Curve
As Chicopee said, learn how to use the OSNAPs. If you want to draw a line from the center of a circle to any point on the circle, type the following (<SP> = Space bar):
LINE<SP>CEN<SP>
Bring the crosshairs over the circle somewhere and a blue box or diamond or circle will appear. Click. AutoCAD has the center.
Then type:
NEA<SP>
Bring the crosshairs near where you want the line to connect to the circle. Click again.
There are a variety of OSNAPS:
NEA - Near to
END - End of
CEN = Center of
MID - Middle of
INT - Intersection
to name a few. There are more. If you will be working with AutoCAD 2012+ a lot, learn how to turn on "Running" OSNAPS.
As far as "Reference" lines or dimensions, I'm not sure what you mean.
If you mean non-printing entities only visible on the screen, create a layer for them and make the layer a non-plotting layer. If you go into Layer Manager you can make a New Layer. Do this in model space. In the Layer Manager there is a column that permits you to toggle a layer to be non-plotting. Click on the symbol in that column for the layer you created.
If that's not what you mean, please explain.
Ralph
Structures Consulting
Northeast USA
RE: Point on Curve
The OP's experience is with a parametric modeler where dimensions are either driving or driven and geometry is either "normal" or construction (think of drawing board).
RE: Point on Curve
RE: Point on Curve
The OSNAP answer is correct for everything else you need. OSNAPs are the glyphs you see in NX for 'point on curve' 'midpoint' etc. In AutoCAD, if you turn on OSNAP (There's a button at the very bottom of the application)
Here's the location of the button to activate OSNAP. Right click to pull up the menu to toggle /which/ OSNAPs are active (endpoint, arc-center, midpoint, nearest (which is point-on-curve for acad) and more): http://static3.cad-notes.com/wp-content/uploads/20...
Here's a very thorough tutorial on OSNAP usage: http://www.cadtutor.net/tutorials/autocad/object-s...
Hope that helps. I was the 'Autocad expert' in-house at my last company, and moved on to a company with modern parametric modeling (NX) which is much nicer.
RE: Point on Curve
B+W Engineering and Design
Los Angeles Civil Engineer and Structural Engineer
http://bwengr.com