2012/6/7 Ralph Stirling <[email protected]>: > I'm putting together a little 3-axis system with a horizontal rotary > table (like a C axis), an X axis, and a Z axis. I'd like to program > it as XYZ, though, so I need some kinematics to convert XYZ to XZC > (or r, theta, Z if you prefer). Scarakins is a little bit like what I want, > but it has three horizontal revolute joints and a single vertical sliding > axis. I want one horizontal revolute joint, one horizontal sliding axis, > and one vertical sliding axis. Has anybody done a kins like this?
C axis rotates around Z and it is vertical. You want it horizontal. Do I understand that it would rotate around X (and move the points on surface of cylinder along Y)? I think that it is pretty simple, but there are few things to find out: 1) do You want it it take g-code for xyz and want LinuxCNC wrap it around cylinder? Or do You intend to prepare customized g-code? 2) as You mentioned, the radius of cylinder is important. How do You intend to let LinuxCNC know, what that radius is? Somehow in g-code? Somehow manually from VCP panel, or hardcode it in kinematics as a function of Z position (for example, at Z=0 tooltip is at the center of cylinder or similar). The last one might be better for things, where the diameter is changing, for example, shape of bottle, but it depends, what exactly the machine is supposed to do. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
