STL machining problem

[starn36]

Hi everybody,

I have a problem in programming toolpath on stl file. In someplace on the toolpath, the tool plunge on the piece at a random depth go ahead a little bit and return on the surface(triangle)to continue the toolpath. This problem appear in some place on the model. My Stl file is perfect(no holes, the normals are correct).

My model represent a sculture with no flat area. It present a lot a small triangle(30000).

 

Can you help me to find the problem?

[cadist]

Welcome to the forum

 

While machining stl files I would recomend convert your file to surfaces with the help of stl2srf.dll All the surfaces will be visible so it will be easy to diagnose the problem.

[starn36]

Hello,

Thanks for your response but I used the stl2surf.dll but it's takes about 20 times more time to compute. Remember that my model contains about 20 000 triangles and more. I did a test with a 6000 triangles files and it take 5 minutes with stl2surf.dll and about 15 sec in a the regular way. So I need to know the problem with stl file. Thanks

[cadist]

Well starn I am not doing direct stl machining much, but can you put your file on ftp for me and others to check.

[starn36]

Here's the link for my stl exemple

 

ftp://www.ppcadcam.com/Mastercam_forum/MC9_files/stl21.stl

 

Here's the linl for a picture of the problem

ftp://www.ppcadcam.com/Mastercam_forum/Al.../stlproblem.jpg

 

Thanks

[cadist]

Starn Just had a look at your file. I will come back with some toolpath. But first if you don't mind what is this thing, Looks too much like Ganpati(A hindu god). Is it?

[starn36]

I don't really know if it's Ganpati. It's a piece of building (granit sculture). I think it's a king of flower or kind of ornementation.

[cadist]

Done it starn, I tried contour, scallop and parallel.(all finish at 0 stock) and after that did a stl comparision. I think when you selected the stl file, you had not taken max #tris. I kept it 0 for all. Just my thought.

[starn36]

For the max #tris, i put it at 0. Did you zoom on your toolpath? Did you see some plunge at some area? Did you have spot hole when you do a "verify"?

If your toolpath seems very continious, can you send me you mc9 file? maybe I could find something

Thanks