same parameters, different toolpaths

[TECHSERV]

Hi All,

 

I'm having a problem with some surfacing. I'm doing 2 operations of surface finish parallel on the same surface, the only difference being that the first time I use a 1/8" flat EM, and the 2nd time I use a 1/32" BEM. The rest of the parameters are the same, but the toolpath generated is completely different. The thing is, I did this Exact same thing on an earlier program, and it did exactly what I want on both toolpaths. I put both the good and bad files on the FTP site in the MCX_MR2 or earlier folder. (Yes, I know. I was in a hurry and picked the wrong one.) The good one is called 20 MM good. The bad one is called 30 mm bad. Just check out the surface parallel toolpaths in the first group in the "good" program. I cannot figure this out. Any help would be great. thanks

[3R!< W3NG3R]

Sorry, but I can't figure it out either. Very weird.

The surfaces are not 100% the same if you analyze them. The only thing I could find. Couldn't fix it though. If I re-created the surface in the good file, the same thing happened there too.

 

send it in to QC and see what they say

[TECHSERV]

Thanks for the reply. I was just about to write what I found. I imported the surface from the "good" part and selected it as the drive surface and....TADA!!!! It worked. In analyzing the surfaces (simply by doing an analyze entity), I found that the one from the "good" program has control points of 10 by 4, and the one from the "bad" program has control points of 6 by 6. How are they different, and how can they be changed? I mean , what makes one spline a 10 x 4, and another 6 x6 if they're made the exact same way?

[3R!< W3NG3R]

don't know. I tried to create it as many ways as I could think of and none worked.