topic Re: Ogee Curve. How to find dimensions and complete drawing in AutoCAD Forum

Ogee Curve. How to find dimensions and complete drawing

philxkusslerx — Tue, 20 Feb 2024 17:21:34 GMT

Hi all,

I am working on learning to do an Ogee Curve. I am a little lost on how to set this up, can anyone offer up help on how i can complete this drawing and figure out some of the dimensions? Thank you so much!! I am working on the second drawing, the one in metric.

Re: Ogee Curve. How to find dimensions and complete drawing

Patchy — Tue, 20 Feb 2024 18:00:08 GMT

It's missing a crucial dimension for the intersection of the reverse curves, I think it's about like this:

Re: Ogee Curve. How to find dimensions and complete drawing

philxkusslerx — Tue, 20 Feb 2024 18:04:37 GMT

Sorry I am referring to the second drawing in the PDF. My apologies if I didn't make that clear.

Re: Ogee Curve. How to find dimensions and complete drawing

Patchy — Tue, 20 Feb 2024 18:18:39 GMT

https://www.youtube.com/watch?v=SI9p52NT7as

Re: Ogee Curve. How to find dimensions and complete drawing

philxkusslerx — Tue, 20 Feb 2024 18:26:14 GMT

How do I find the angle of the bisect line? I am trying to use an XLINE but can not seem to get the reference points correct.

Re: Ogee Curve. How to find dimensions and complete drawing

Patchy — Tue, 20 Feb 2024 18:44:24 GMT

Re: Ogee Curve. How to find dimensions and complete drawing

philxkusslerx — Tue, 20 Feb 2024 19:34:44 GMT

Thank you all! I was able to figure it out!

Re: Ogee Curve. How to find dimensions and complete drawing

richard_387 — Tue, 20 Feb 2024 19:46:40 GMT

There is a way that only involves three temporary lines and the curve can then be drawn directly. It uses the inbuilt feature of AutoCAD that an arc drawn directly after a line is tangential to that line, and successive arcs are tangential to the previous arc. The dimension of the ogee curves is not needed.

First of all draw a line from A to B, and then with Ortho on, draw a short line from B to the right, then draw a line back to B. Draw these lines continuously.

Then start the Arc command, and when the command line needs the first point, just press Enter (a null response). The arc will be tangential to the last line drawn. Then draw the arc to the Mid point of the line AB. Then another Arc to the point A. Erase the three temporary lines, and there is the Ogee curve.

Re: Ogee Curve. How to find dimensions and complete drawing

Kent1Cooper — Tue, 20 Feb 2024 20:40:36 GMT

It can be much simpler -- no temporary object(s) required. ARC command, start point at A [or B], End point option at the midpoint between A and B [M2P or MTP Object Snap], Direction option -- give it 0° from A, 180° from B.

You can even just draw the one from A as described, and then just recall ARC with Enter and hit Enter once more for a tangent continuation of the previous one, and give it B for the end.

Or, draw it as one thing with PLINE, start at A, Arc option, Direction option [give it 0°], give it the midpoint between for the end of that arc segment, then B to finish.