Splines to arcs

[Racer X]

I did a search on this. But, found nothing that is applicable here.

 

I am attempting to machine a core on a programmable lathe. I have my core geometry that I created off of the part file with the shape I need to turn. Problem is that it is in splines. I have squashed the curves to 2d and have tried everything I can think to convert this to arcs. Mastercam keeps giving me "no splines converted".

This is a manually programmed lathe that I seldom use and we do not have any Lathe cam software. So I need to enter in the arc size, start and end points, and center of arc coordinates, etc.

 

If I .iges this file out and take it to another guys computer here that is running a different software it will convert it fine. But, Mastercam should be able to do this, right?

 

Anyone have any ideas??

 

Thanks in advance.

[Allan]

The splines to arcs command is intended for splines that would create a single arc. The command you are looking for is under the modify, break, spines to arcs, this will create arcs and lines from your single spline.

 

HTH

 

Allan

[Racer X]

Oops double post.

 

+1 to post count at least.

[Racer X]

That's what I was afraid of. I tried that and it broke it into 172 arcs. Man are my fingers gonna be tired. I was hoping it would be able to average it and make it much less than that.

 

Thanks!

 

[crazy^millman]

Well do what I do I make up 3 point circles for arc that can make up a spline. It does take a little work but I get better looking parts and smaller Nc files in doing it that way.

[Diablo God]

Did you try

 

Modify - Cnv to arcs?

 

Jim

[Rat]

Create/Arc/Tangent/Dynamic

Fast and Dirty.

[Racer X]

Madbub, Yeah I tried that, to no avail.

 

Millman, thanks. I figured I would have to go that route.

 

Rat, you may be on to something there. I will try it.

 

Thanks again guys,I appreciate the input.

[CAM-mando]

Toolpath and post with filter set to an acceptable tolerance. Use numbers from posted code. If you have a post that outputs similar format to your manual entry machine.

 

OR

 

1. Toolpath (remember to set comp in control) with filtering on and set to appropriate tolerance.

 

2. Change the active level.

Backplot with "save as geometry" on.

 

3. Mastercam will draw the backplot as arcs respecting the filter settings.

 

you can analyze the newly drawn geometry.

[heeler]

Moto GP

 

Try to toolpath it with your filter on. Turn cutter comp. off. Then backplot and save the geometry. Done this many times. You can adjust your filter until you get an acceptable result.

 

HTH

 

Glenn

 

P.S. CAMondo beat me to it.

[CAM-mando]

Simple minds think alike

[jrykrl]

Rat,

What a bitchen trick,

Fast and Dirty for sure

Jer

[CAM-mando]

quote:

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Newcastle Brown! Good for what "ale's" ya!

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Is that the 30 days in the hole variety ?