SPLINE TO CURVE

[Rakesh]

Hi everybody

I remember simplify for round spline but I forget how to convert other spline to line and arc

Any Idea, please

Thanks

[MLS]

Break many pieces

[Alvaro Gil - Cimquest-inc.com]

Break many pieces works, but it does not produce arcs.

 

I find the best way to do this is to Make a contour toolpath with cutter comp off, and zero for everything.

 

in linearization tol set your desired tolerance. For the filter set the desired tolerance (this should be at least 3X more than the linearization tol).

 

Now just backplot, and hit the save as geo button. This will save to lines and arcs.

[Thad]

quote:

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Break many pieces works, but it does not produce arcs.

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The option is there in the ribbon bar, but whether it works or not is a different story.

 

I use Alvaro's method. I have an operation saved in my library that has all the right settings. It takes about 20 seconds and I have lines and arcs.

 

Thad

[Glenn Bouman]

I like Alvaro's method. It would be nice if CNC Software would package these multiple steps into a single function.

[Mike Gates from Barefoot CNC]

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Break many pieces works, but it does not produce arcs.

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Yes it does, I use it all the time. Make sure you change from lines to arcs in the ribbon bar.

[ToolMan184]

I have clicked the arcs button numerous times and can never get it to produce an arc, just lines.

[Guest]

toolman, make sure you input a tolerance

[Mike Gates from Barefoot CNC]

Hey toolmann,

 

After changing to arcs you can use the tolerance, # of arcs to break into, or length of arcs to break to. I have to do it here on some router parts every so often and have not had any trouble lately. I had some trouble in X but not since X MR2.

 

This is how I do it.

 

I create a spline in Mastercam, edit, trim break, break many peices, select the spline to convert to arcs, end selection, pick curves, use the tolerance tab, set to .002, set delete, it should preview showing the arcs in blue and showing the endpoints of the arcs, hit green check mark to finish, analyze and you should have arcs now.

 

If it is still giving you trouble something may be corrupt in the install because it should be working.

[Philcott]

The "Pick Curves" part might be a bit confusing the first time because the box (to the left of the green check ) shows up as lines. Toggle it to arcs/curves and you should get what you want.

 

Phil

[Lee.]

I was really struggling with this yesterday.

 

I just tried break many and set tol to 0.002 and amount to one and it created a line.

 

This what I would have expected, however it is kinda hidden in a function that doesn't shout out convert.

 

It would be good if it were on it's own.

[Rakesh]

Thanks for lot of informations.

If anybody can tell me this:

Is it possible when we use create curve on all edges of surface or solid, only get the output in lines and arcs not to have any spline?

Thanks in advance

[Philcott]

Lee,

 

I agree this function seems to be buried where you would not expect to find it. Modify, Spline to arc might be a nice place to have it.

 

Phil

[Lee.]

Phil,

 

Maybe X4?

 

or X3 SP1

 

I hope CNC are listening.

[Thad]

quote:

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Is it possible when we use create curve on all edges of surface or solid, only get the output in lines and arcs not to have any spline?

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Rakesh, I'm almost certain that this option doesn't exist.

 

quote:

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I agree this function seems to be buried where you would not expect to find it.

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After reading the "V9 to X function map" in the documentation folder, it's exactly where they said it was.

 

Thad

[dvaliket]

Asking for no splines would be impossible, unless your tolerance is very loose For instance, if your part is a piece of round bar stock, your edge curves are on the ends. If the end is cut at 90 degrees, the curve would be an arc, if it is at any angle, you'll get a spline. No way around it.

[Lee.]

Hi Thad,

 

This may be so.

 

It's just that one shouldn't have to go to so much trouble to find it.

 

I even searched the help contents and couldn't find it.

 

It's not really a Break Function. More of a Convert Function.

 

Just a thought.

[Thad]

quote:

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It's not really a Break Function. More of a Convert Function.

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FWIW, in V9 it was Modify-Break-Splines to arcs. What is now Edit-Simplify was Modify-Convert to arcs.

 

Thad

[Alvaro Gil - Cimquest-inc.com]

This function does not work as well as the filter function in the toolpath.

 

Try both methods.

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The trusty backplot-save method:

In this case I used .00005 Lin tolerance and .005 filter tolerance.

 

 

 

The Break Many Method:

Note the difference when using break many and .005 tolerance.