surface trim to curves problem

[nickelback]

When I am trying to trim a flat surface to curves I am getting the error box that states (surface boundary not closed). I analyzed the curve using the (chain,analyze) and it goes all the way around the curve with no problems. I know for a fact that the curve has no breaks in it. Is there a tolerance setting or something in the options that is causing me problems?

[Midwest]

Post a screen shot of your surface.

 

Sometimes you have to go back to the slab surface and trim.

 

make your chain bigger than the hidden (blanked) slab surface.

[Midwest]

I don't have MasterCam at home, but somebody else might be able to help if you put your file on the FTP site.

 

 

 

 

Also if your chain is 3D squash it, so it is 2D.

[Sunder]

Hi Nickelback

 

can you upload your file to FTP

[bellyup]

i've had many problems with this function in the past, and reported many, but i got tired of sounding like a broken record, so i just grind my teeth and do workarounds. can't say yet for X, but at least as far as v9, they still exist.

 

 

so after you've checked your chains validity,

some things that may work: 1.)squash chain as someone said; 2.)try to eliminate splines. lines and arcs seem to work better; 3.)when possible as a last resort, create a new surface. i can't figure out why one flat, untrimmed surface won't trim to a single line in a flat plane, but create another, and it will trim fine. unfortunately, you cannot recreate more complex surfaces, so that's where this workaround won't help.

 

hth and lots of luck!

[stsrvanvliet]

if you go into screen, configure, and click on the tolerance tab; you can change your chaining tolerances.

[toolall1]

if you are trimming line to line it will choke also . alter your chain so this is not the case and try trimming again.sometimes a trim that chokes in a spacific plain trims out in 3-d mode.

good luck.

[Fig sign]

You can use ignore depth in chaining mode

BTW I always was more succesful converting my chain to one spline

[toolall1]

if all else fails re-creat it.if you can

[Midwest]

quote:

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sometimes a trim that chokes in a spacific plain trims out in 3-d mode. [Head Scratch] [Head Scratch]

good luck.

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Try

 

Screen

Next Menu

Comb views

 

[Dave Pomper from CNC Software Inc.]

Nickelback, if you can upload the part to the ftp site, we can take a look at it. It will also be helpful if you let us know what version of Mastercam you are running.

 

As far as the message you are receiving, your curves may well form a closed boundary, but they might not intersect fully with the surface you are trying to trim. Good things to check (just to be safe) are if you are trimming in the current view, make sure your curves overlap the surface in that construction plane. If you are trimming to the surface normal (at least in X) you will be able to specify a maximum distance from the surface that the curves may lay. If you are having trouble with one option, try the other. Those would be the first things I would check without having seen the part.

[Thad]

quote:

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It will also be helpful if you let us know what version of Mastercam you are running.

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Where have I heard that before?

 

Thad

[Hardmill]

 

I know, I know

 

 

PEACE

[Nils N]

I do like Iskander and try to use one spline line. Another thing I do is make the line go off the part and if all that fails I take it into Rhino and trim.