Hello, when the plasma is at an angle to work, it is more difficult for the control to 'see' the height ( one side of the surface is often gone ). Similar to drilling a sphere, its easy when the drill path is a radius to center, but difficult when off center, very difficult as you approach the equator ( glancing cut ).
The usual THC technique of voltage difference is used, but the control must be more robust and the loop quicker to react. Several manufacturers rave about their implementations of bevel cutting. Some inspection of their methods may be useful. https://www.hypertherm.com/products/surecut-technology/plasma/true-bevel/?region=APAC https://www.google.com/patents/US8946583 http://www.hacoatlantic.com/upload/attach-image/plasma-1-3.pdf http://www.messer-cs.com/en/eu/products/machines/omnimat/components/process-tools/plasma-cutting/bevel-cutting-plasma/bevel-head-skew-rotator-infinity/ HTH tomp tjtr33 On 09/21/16 18:52, Lisandro Massera wrote: > 5axiskins exports a pin pivot-length which is the tool length offset. > > You will have to be careful when conecting this pin to the THC because the > THC can have big steps in its output which could cause following errors. > Maybe you should connect the output to a filter and then the output of the > filter to the kinematics module pin. > > Lisandro > > > ________________________________ > De: Andrew <pkm...@gmail.com> > Enviado: miércoles, 21 de septiembre de 2016 11:31 > Para: EMC developers > Asunto: Re: [Emc-developers] THC with 5 axis plasma > > You need to introduce virtual axis W for that purpose. > There's this config... 5axiskins or smth. > > Andrew > > 2016-09-21 14:11 GMT+03:00 Marius Liebenberg <mar...@mastercut.co.za>: > >> I agree. It is more al the signal level or HAL level or component level >> that I am wondering about. You cannot simply change the Z value as we do >> with THCUD. There are A and C axis involved now as well. > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > Emc-developers Info Page - > SourceForge<https://lists.sourceforge.net/lists/listinfo/emc-developers> > lists.sourceforge.net > The Enhanced Machine Controller (EMC) is a CNC machine controller that runs > on Linux and is available under the terms of the GNU General Public License. > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
