Viesturs there is a couple things you can try, unfortunatly this bur that is appearing on the bottom side of the cut is a common thing and some materials are worse than others. I've found that stack cutting parts [put 10 or more layers of material and cut at one time] will help this alot. You may need to clamp the sheets of material so they don't get liquid or garnet between the sheets. A smaller focusing tube and orifice will help but not nesc elliminate the bur. We operate a WJ and while we don't often cut thin material when we do there is often the need for some cleanup due to this bur. HTH Jarrett Johnson
On Sun, 21 Oct 2012 22:21:04 +0300, Viesturs Lācis <viesturs.la...@gmail.com> wrote: Hello! > > I have a problem with cutting thin (0,5 mm) metal sheet on waterjet - > it creates a sharp barb (sorry, I do not know correct word in English) > on the bottom side of the cut all along the cut path. I have seen this > only on thin metals. For 3 mm thick metal bottom side is fine and > beautiful. > > The thing is that these parts have to be placed atop on each other in > blocks of 200 parts and even more, so the bottom side has to be > smooth. Currently they are cutting those parts by hand, but they want > to reduce the amount of hand labor. Laser and plasma have been > rejected as they burn off the protective coating on material, but test > cuts on waterjet have that sharp barb on the bottom that I have seen > also in other cases, when I was cutting sheets of thin metal. > > I know that some LinuxCNC users have experience with waterjets. Can > anyone suggest me something to fix that? Is it depending on garment > size of abrasive? > Slower feedrates have already been tried. > > -- Viesturs > > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > www.innovention-tech.com ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
