bad surfaces

[HEAVY METAL]

Hello

I put a part file on the ftp called "bad surfaces" I am trying to remodel the surfaces with gaps . Mainly the fillets on top of part and opening of pocket. I've tried swept and ruled surface and it is not working for me. This is the first time I've had surfaces bad enough I think it is affecting the surface toolpaths so I have had little experience repairing or creating better ones from the curves or wire frame. I hope some one has a few suggestions if they have time to take a look.

Thanks HEavy

[Festus]

wow!!! that looks bad!!! have you tried coonsurf?

[HEAVY METAL]

No I will give that a try

[HEAVY METAL]

Don't see a coons surface option ????

[Festus]

Coonsurf is a c hook. look under settings/ run user application. i'll see if i can get it for you, but it's a neat c hook to get used to!

[HEAVY METAL]

Thanks didn't know about that c-hook I'll check it out

[K2csq7]

Do you have a print for it? Looks like it might be easier to just remake it.... I don't think I could make surfaces that bad if I had to!!!!!!

[CJep]

In the McamX release "Net Surface" replaced "Coons Patch" the advantage to net surface is that the direction and the order of the chains doesn't matter, were as with coons patch the chains had to be picked in a specific order and the direction had to be the same for each set of chains.

 

Some folks wanted access to the coons patch utility in the McamX version so it was put back in as a c-hook.

[CJep]

Do you have the original geom? Are you creating this from a 2D drawing? Can you create the model in solids?

[HEAVY METAL]

yes i have a 2d file but this is not easy to reproduce this raps around a diameter .This is a bump on the part and I'm tring to create a electrode from this . I 've flipped the surface for this purpose. I did not create the orginal model which is a pro-e file so I have no way of modifying the solid

[CJep]

I did not create the original model which is a pro-e file so I have no way of modifying the solid

 

You have a solid of the part then,.. can you create surfaces from the solid model and then modify those surfaces?

[HEAVY METAL]

I think I aready tried that but I give it another shot.

[MotorCityMinion]

Save it (the solid, not the surfaces) as a para solid or step file and I can take a look.

[Nils N]

I'd send it back to them with pictures detailing how bad the surfaces are. That's very sloppy work. Even if you do redraw it are you going to get compensated for the time

and who signs off on the new drawing. Lots of things to consider here. JM2C

[HEAVY METAL]

The solid looks good but when i create surfaces thats when I start to see gaps and bad blends .

[K2csq7]

Go to

>Settings

>Configuration

>Tolerances (on the left)

 

What do you have for "Maximum Surface Deviation"?

[HEAVY METAL]

I created my surfaces from the solid faces and things turned out a little better but not perfect

[K2csq7]

I create surfaces from solids all the time, never had issues like that. Whats that tolerance set to?

[Mr. Wizzard]

if it's from pro-e, search for related discussions. I think Murlin is the expert on these things and has explained many issues i've had when importing pro-files. It has something to do with the tolerance settings in pro-e when the file was created.

 

I will try a rough explanation, as i understand it. The tolerances in pro-e can be set very loosely and create surfaces/solids that aren't "accurate" by fudging the math to mesh them. When you import them to MCAM, the imperfections get ugly and don't mesh. I think pro-e lets some engineers get sloppy when creating solids/surfaces and the tolerances in mastercam won't let you bring in "crap" very well.

 

That's what i get, anyhow.

[Jayson Kramer]

Buy the way Moldplus's trim editor fix's gaps in surfaces nicely. I had played with the file yesterday and could fix the gaps. But I also had my Chord height set to .0001 this mad it nicer but when I set it back those were really bad .

But as I was saying look into moldplus for great surface tools.

[HEAVY METAL]

man this thing is hard to get a toolpath on. what would be a could path for the radius edges and i cant seem to get the very bottom of the cavity nmachined. high speed paths acting strange sometimes the won't regen and it does not give me any error message but the toolpath remains dirty.

[Mr. Wizzard]

check your surface normals, maybe

[HEAVY METAL]

norms should be pointing out correct?

[Dtm]

Buy the way Moldplus's trim editor fix's gaps in surfaces nicely. I had played with the file yesterday and could fix the gaps. But I also had my Chord height set to .0001 this mad it nicer but when I set it back those were really bad .

But as I was saying look into moldplus for great surface tools.

 

How much is moldplus?

[Mr. Wizzard]

norms should be pointing out correct?

 

Yes, toward the tool.

With HSS paths, it may be a number of things.

Containment, gaps along edges, check surf's, stepover, min/max depth