On Fri, Jan 2, 2015, at 01:03 PM, andy pugh wrote: > On 2 January 2015 at 17:58, John Kasunich <jmkasun...@fastmail.fm> wrote: > > Also, I have a simple mechanical question: How is the cutting wire > > kept tight? Cable bipods don't have any ability to resist tension > > perpendicular to their plane. > > The archetypical version uses a wooden C-frame to tension and weight the wire: > http://www.cnc-hotwire.de >
In that case, you only have the errors caused by the controlled point(s) moving out-of-plane when the cutting wire is tilted. Small for modest tilts, but increasing rapidly with angle. Dan mentioned angles up to 22.5 degrees. If one controlled point could be constrained in all three directions, then the kins to compute the location of the other controlled point (and all four bipod cable lengths) are relatively straightforward. -- John Kasunich jmkasun...@fastmail.fm ------------------------------------------------------------------------------ Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
