Settings for exporting to DXF format .

I'm not familiar with Rhinoceros, but I have found somtimes it depends what version (release) it is exported from. Did you try all (AutoCAD version) release options?

I would use curves and spline options.

I agree with Hellcat above.

I have used Autocrap© for 20 years now and did a little experiment years ago. I created a Polyline then I EXPLODE'd it. I found out that when Autocrap© explodes

things that the exploded polyline ends up as a bunch of more smaller lines then what you used to originally create that polyline. This told me that Autocrap© interprets polylines as discreet software predetermined bits (lines). That is why you are getting a large DXF file with lots of chopped up little lines composing the polyline. Take Hellcat's advice and use splines, Autocrap© interprets a spline as one contiguous line even when DXF'd out. This should help with your DXF resolution.

Good Luck

P.S. Switch to SolidWorks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!111

Thanks for the advice. I am very happy with Rhino, very userfriendly and I paid for the program. Solidworks is above my budget anyway. I still dont know the difference between poly cord height and poly seg length. And what is a bulge arc. Use simple entities. I used splines once and when they opened my file in their program it changed some of my arcs completely. I usually get the thing cut right but it depends on the complexity of the drawing and how many times I chopped and changed the drawing. Some times without warning my file gets completely messed up with some lines missing and open contours where I made sure there were no open contours. At least when it is broken up in small bits everything is there, but they struggle because it takes long for them to open the file.

Do not use spline. I don't think any laser software know spline.

Polyline will estimate curves with segments of straight lines. The segment length determine how many lines there will be. Smaller value, more segments.

The best is to systematically try all settings and see which one works. If you still can't export with arcs then increase segment length to reduce file size.

See if help in Rhinoceros explains the option.

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