Polyline to arcs or splines

[Leandro]

I have near 600 Letters like in this example.

You cann see that has been made with Autocad polyline.

I need smoother arcs (or Splines) for a more accurate engraving

¿Wich is the fastest way?

 

Thanks

 

ftp://ftp.mastercam.com/Customer Area/To Mastercam/R.MC9

[Robert Ouellette]

The fastest way i do it is window your chains and do a contour tool path with no cutter comp so your tool is on center of your chains. then back plot and save geometry to another layer. delete rapid moves and your done. I do this hundreds of time a week for my waterjets when i get customer files for signs

[Leandro]

Bob thank you but with this method I get the same arc.

I need "smoother" arcs.

[Storkman]

break the spline into lines before running the toolpath then filter it before backplotting.

[Robert Ouellette]

Forgot to mention turn filter on. been long weeeeek

[Leandro]

Now works perfect

 

Thankyou

[Eric S.]

Cool tip Bob I'll have to remember that one

[Eric S.]

Now that I am thining about this some more I am wondering why you can't just post the filtered toolpath and use it?

[Robert Ouellette]

eric most of the time i am cutting letters for a sign and to save material i nest all chains really close together to save material. the way i do it has become so easy. i have my back plot set to save on layer 250 and all i have to do is hit the button to save geometry and back plot and then erase original, nest new geometry, and the make new tool path that does not cross over already cut parts. just in case one of them decided to flip up and snap my nozzle. large signs take 15-20 mins and they are ready to cut. since i started running these water jets have learned so many short cuts that are great but that i would never have learned running a mill or lathe

[Robert Ouellette]

we dont just post the filtered tool path because must of the times when i get polylines and splines there are overlapping entities and broken chains that can't be fixed until after i have saved the filter tool path cut on center. then it is much easier to trim lines and arcs together. also my controls don't like polylines in the tool path. don't know why but they don't work. in mc9 all looks good but when i post it not good. so i just learned to chain on center and filter. and all works very well

[Leandro]

Eric

My leeters are for tire sidewall. Usual I have to add a hatch inside.

In other case I get letters from a database and put it in the right position.

[Eric S.]

Thanks for the explanation