2012/1/19 Florian Rist <fr...@fs.tum.de>: > Hi, > has anyone ever used LinuxCNC to control a 5axis (two x/y-portals and a > rotary table )hot wire cutter? > > I own one of these machines: > > http://en.step-four.at/hp2/index.php?action=450 > > And I'd like to overcome some of the limitations of the provided > controller software. The hardware side is simple: Stepper motors > controlled by two parallel ports. So that should be no problem, but the > kinematics bother me and I'm unsure which axis I should use. X and Y for > the first portal, U and W for the second and A for the rotary table? Or > X and Y for the first portal and A and B to specify to angels of the > wire and C for the rotary table? This would make it necessary to > calculate the coordinates on the second portal in the kinematics module. > Any suggestions? >
Since both of these options are possible, I think that the choice depends on: 1) Your skill and will to work on kinematics module; 2) ease of g-code generation for each of these options; Actually, if the wire slope is specified as 2 angles, then it should be pretty easy to set up kinematics, because offset between portals along Z is constant, right? So pos->u = pos->tran.x + offset*tan(B) And pos->v = pos->tran.y + offset*tan(A) Plus/minus signs should be checked, but I think that this basically should fit. Viesturs ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
