Need help with Spline to DXF to Polyline

[buscht]

I'm having a problem that is confusing me and need some help.

I know that if I save an Autocad drawing with splines as a R12 DXF file, it will change the spline over to a polyline and then I can machine it.

The problem is that sometimes when I do this, the resulting line is not smooth anymore. It has thousands of little jagged steps.

I have done this before and gotten smooth lines so I'm thinking that there is a setting that I'm missing.

I tried adjusting the DXF export precision from 1 to 16, but never really got the results I wanted.

Any suggestions will be welcome.

THanks
Trent

[ger21]

Do you mean like a stairstep effect?

[buscht]

Yes, they are only about .001 to .002 in size.

[ger21]

I haven't seen that. I thought it might be a system variable, but can't find one. If you can't figure it out, you could use the spline to polyline lisp from Cadalyst magazine. This is a new one. http://new.cadalyst.com/code/browsey...ullyear=2005#6

I've been using the one from December 2003.

[buscht]

Thanks Gerry, that Lisp routine worked pretty well. I just had some minor end clean ups to do, but very easy.
Trent

[ger21]

One thing I've noticed with it, is that sometimes it clips or extends the ends of the splines. It doesn't happen often, and it's usually a drwaing that I didn't do. It also converts 3D splines to 3D polylines. That's how I'm doing those MDF panels.

[buscht]

Gerry, the Dec 2003 version clipped and and extended the splines. I tried the newer version and it worked alot better.

[ger21]

Thanks. I'll try that one too.