hi , i just need help , is there any way to divide arc in auto-cad into a multiple segments , usually i do (divide) then i draw a polyline above the divided arc , is there any other way to divide the arc into multiple segments directly ...i want to do this because when importing the extruded arc into a 3dmax the arc will show broken edges because it is only has a 3point ..thanks you in advance...

Try DivBreak, please.

hi , and thank you for helping me , i will try it today and get back to you...thank you again  

DivBreak? What's that?If I understand your question correctly, you don't need to divide your arc into multiple segments in order to import it to 3DS Max. You just need to adjust your import settings.

Cad64:DivBreak is a download from CADforum and is described this way:"DivBreak - breaks polylines to a defined segment number/length - combines the BREAK and DIVIDE/MEASURE commands." I would recommend that if a person suggests a routine that is not standard to an AutoDesk product they describe what it does and where it might be found.  Personally I, for one, would find that information to be very helpful.It's just a suggestion and no offense is meant or implied.
John Connor2011-03-18 10:59:11

[QUOTE=John Connor]I would recommend that if a person suggests a routine that is not standard to an AutoDesk product they describe what it does and where it might be found.  Personally I, for one, would find that information to be very helpful.
[/QUOTE]I agree. As you can see from my previous post, I had no idea what was being suggested. I knew it wasn't a standard Autocad command, but I didn't know if maybe it was a command that's available in Architecture or Civil or some other program? My other thought was maybe it's a lisp routine, but there was no mention of where to download it or what it does. A little more information would be very helpful in situations like this. But as I said, there's no reason to break the arc into multiple segments. You just have to adjust your settings in the Import dialog when you bring your CAD file into Max.Try setting "Curve Steps" to 20 and "Maximum Surface Deviation" to .01 and see if you get better results.Edit: I just noticed that the word DivBreak in PepaR's post is a link. It's very difficult to distinguish links from plain text. It would be nice if links were a different color and more bold so you can tell at a glance that it's a link.Cad642011-03-18 15:36:28

And so it is.  I did not notice that DivBreak was a link either.  Thanks for pointing that out.  I'll have to either look more closely from now on or run my mouse pointer over all the text to discover any hidden gems.  Sharp eyes there Cad64.

Congratulations guys, I waited for discoverer of a link ;).

hi and thank you for help , i tried increasing (smooth-angle) when importing the cad file into 3ds max and it works , the faces became smooth but the top face of the object still having jagged edges or broken edge ...i am working on a big projects containing a lot of arcs and circles , and i cannot divide every arc into segments because it will waste a lot of time..so do you know if any other auto-cad software doesn't have this problem like maybe auto-cad architectural .....thanks 

You will never get an absolute perfectly smooth curved surface from your imported CAD file. The import settings I mentioned will only get you just so far. Once imported, you will need to apply a Smooth modifier, or possibly a TurboSmooth modifier in order to completely smooth out the curved surfaces.

hi and thanks again for helping me here , someone was saying that autodesk inventor doesn't have this problem , i need to ask can i draw a 2d plan in autodesk inventor and then extrude it same as auto-cad ?thank you again ...

Inventor has 3D capability.

If you're going to import the file into Max, I believe the result will
be the same. You can download the 30 day trial version of Inventor and
give it a try though, and report back with the results.

 hi everyone , i am going to try the trial version of inventor to see if it is going to fix the problem and i'll get back soon with the result....thank you all ....