Surface Faceting

[MillMan]

All, I do alot of surface machining and always seem to see more surface faceting than I would like...for example, domed surfaces alway need quite a bit of bench work because of all these small surface faces...

Is there any force mastercam to filter these out?

[lathe guy]

under the tolerance tab there is a option to use one way filtering wich i think would probably help, also if your machine has room try using a smaller tolerance value wich should make the facets smaller, but a larger nc file in general

[MillMan]

thanks I'll try it.

[Jimmy Wakeford from Barefoot CNC]

Also decreasing the tolerance from .001 to .0001 will smooth the part.

[nanchariah]

hello,

 

under the tolerance tab there is a option to use one way filtering wich i think would probably help, also if your machine has room try using a smaller tolerance value wich should make the facets smaller.

bye

nanchariah

[corner2]

I have seen this problem many times. The error is in the tolerance. For finish 3d machining a tolerance of .0003 seems to work best and make sure you use the arc filter that is in the tolerance tab. Iv'e never used the one way filtering option but I set the filter ratio to

1:1. If you are doing roughing or semi finishing you do not need to run such tight tolerances. If you leave .020 stock remaining a tolerance of .005 is fine. At .010 stock remaining I use .001.

 

You can actually see the facets in the verifier when you use different tolerances. You need to zoom in to see them but they are there.

 

Hope I could help

[vatsav]

hello,

 

* For to avoid surface faceting you may use filter tolerance between an arc range of .001 to 10000

with all plane ON(i.e. XY,YZ,ZX).

 

* Reduce the cut tolerances.

 

* Reduce the % of Stepdown in the Gapsettings.