surface finishing with the filter

[jbrg]

hey,

 

I am doing some 3-D surfaceing with V8.

However, I am using a solidworks part model. When I bring it into V8 it turns what you would think

would still be one surface into many little surfaces.

I am trying to use the filter to get the surfaces to blend together so that all the little

surfaces are not so noticeable.

Can any one tell me why I can't get a good surface finish when I use the filter?

[Allan]

You need to look at your cut tolerance. It should be set to half your required tolerance and then filtered to half your part tolerance.

 

So if your looking for a .001" tolerance then cut tolerance is .0005" and filter tolerance is .0005".

 

Sounds like you are getting faceting usually caused by too sloppy of a cut tolerance.

 

Allan

[jbrg]

Hey Allan,

I did what you said on the computer and it looks better, I'm just waiting to get it on the machine.

Thank you.

[jbrg]

Hey Allan,

I did what you said on the computer and it looks better, I'm just waiting to get it on the machine.

Thank you.

[Robby GM]

ive had parts come out that you could see in the part the different surface patchs, but they are too small to effect ( in the .0000,s)

 

smaller cut tol helps

[Mick]

A long time ago, I found that whenever I received and machined a customers part file, I would get the faceting effect, even with a .002mm machining tolerance. I found out that the customer was using the default modelling tolerance in ProE. When he tightened it right up, and then sent us files, the finish came out really smooth.

If the faceting is in the model, you wont get rid of it, unless the model tolerance is tightened up :/

[Tony]

What if I bring in the model, change to .0001

Chord height then machine it?

Does MC generate toolpaths off of

the surface I am now Seeing or the Models original tolerence?(I use filter to arcs to kill the facets anyways)

 

My local news: "Diamond Mold ,Rego mold and Advance Dial" shut there doors this week...

The five of us left in our toolroom have work through Nov.

[Guest CNC Apps Guy 1]

Tony,

 

If there's faceting in the model, you won't get rid of it no matter what you do. No amount of filtering, nothing short of remodeling/getting a new model will fix it. It's not a Mastercam issue, it's a file translation issue. Get with your customer and have them send you files with no more than .0001 (depending on the application of course) chordal deviation and things will smooth right up.

 

JM2C

[Tony]

James

At one time a UG jockey here

Did all his modeling 12 places back! ( That systems Max)?

Talk about the opposite end of the spectrum...

 

[ 10-04-2002, 01:44 PM: Message edited by: Tony ]

[Guest CNC Apps Guy 1]

12 places???? YIKES. That's tolerances only lasers can check.

 

Yeah that's a bit over kill, but.... there should be no problems with faceting either.

[wildcat99]

jbrg:

 

What are you converting the Solidworks file into before importing into Mastercam? It sounds like you might be using .STL???

 

I haven't seen this problem with the Solidworks models and 3D surface machining we've done so far. I import the SW files in Parasolid format into Mill 8.1.1 with no problem.

 

Just a thought. Good luck.

[Greg Williams]

Hi all,

 

I have seen this problem and in my case it was coming from the modeling tolerance used by the customer. The only fix is to get them to tighten up there modeling specs.

 

[ 10-05-2002, 03:39 AM: Message edited by: Budgie ]

[cadcam]

jbrg can you share the bad file with us?

This cam from SolidWorks I would like to see the "SLDPRT" & you MC cope if possable.