Joinning lines/ellipse arcs an

Nass · 发表于 2022-7-7 16:40:56

Dear CAD masters,
I was looking through the Help for few days how to join line or polylines with ellipse arcs or circle arcs and now.. I give up!
Here is my problem:
What I would like to draw can be compared with a pear: a succession of circle arcs ellipse arcs and maybe polylines. Once the profile done, I was planning to use REVOLVE or (EXTRUDE + FLLET) to finish my drawing... the problem is that I can't join 2 ellipse arcs from different ellipses (which means neither with a circle arc...)
May be I'm doing things in the wrong way:(... can anyone help me to find out !
How would you proceed to draw a pear ?
Thanks !!

PS: I'm using autoCAD 2006 z.54.10 version

fuccaro · 发表于 2022-7-7 16:52:26

The ellipse can be created as a polyline -check the PELLIPSE system variable. Be sure that the arcs/lines are properly connected end to end. Now you must connect all the lines/arcs into a single polyline. For this use the PEDIT command.
Post again if you need more help.

Welcome in the forum!

Nass · 发表于 2022-7-7 17:05:12

Thanks !!
That was really helpful

SLW210 · 发表于 2022-7-7 17:07:18

Make sure they have the same z value as well.

ellennguyen · 发表于 2022-7-7 17:16:47

Thanks for your helpful answer. I'm running into another problem after this. After join all the lines/arcs, I then save it as dxf file and load the file into NC Studio software to run a waterjet machine. For some reasons, about less than 1/4 of an ellipse is missing. Am i doing something wrong? It look fine in Autocad but missing part in NC Studio software.

Please help

Thanks

JD Mather · 发表于 2022-7-7 17:30:12

Does your CNC software have a g-code for ellipse? What g-code does it say when it cuts this "1/4 of and ellipse"? (my guess is a g02 or 03 arc) You might have to convert to arcs.

http://www.cncmate.com/ellipse.aspx

ellennguyen · 发表于 2022-7-7 17:34:12

Thanks for your reply.

I'm not sure how to tell if my software have g-code for ellipse. However, I tryed to use polylines instead of lines to connect to an ellipse after use pellipse command and it worked great. I don't know if it is a software issue or anything else.

Please comment if you have any idea

Thanks

ReMark · 发表于 2022-7-7 17:45:43

So now you know there is a difference in ellipses depending on how you set PELLIPSE. Keep that in mind for the future.

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