On Sep 20 2013 2:08 PM, Florian Rist wrote: > Hi EBo > >> What code were you testing with? > > Just a few lines of G-Code generated by a Rhino script to evaluate if > using splines might be an option in machining complex optical free > form > lens. Result: Very promising, but to much work to implement a script > to > generate the code.
if you can provide me an example I will look at it, and write something in C that should be quicker. >> BTW, if you can point me to some docs on the Sinumeric >> (and how you are thinking to program it), I will take a >> quick look. > > Sinumeric controls can perform a spline approximation of a polygonal > tool path on the fly while executing the program, but Siemens also > provides a kind of pre-processor to process standard polygonal code > and > convert to spline code. Obviously the are not expecting any CAM > program > to generate spline code, as the documentation on the format is rather > poor - or I'm just unable to find the right manual. > > You will find some basic infos here: > > http://www.automation.siemens.com/doconweb/pdf/840C_1101_E/SPLINE.pdf > > On page 3-16 you will find a simple spline program. > > I'm using the on-line spline interpolation on all free form milling, > works well. looking briefly at this, section 1.3 implies that they consider a "standard spline" as a camul-rom spline. This is very different from a B-spine. There are a couple of things I could try and see how it works, how long it takes, etc. I'll let you know if I decide to give it a try, but it would be helpful to have a few examples. EBo -- ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
