At 09:44 AM 6/2/2007, you wrote: >On Sat, Jun 02, 2007 at 09:26:44AM -0500, Ray Henry wrote: > > > > There are places in the emc where specific relationships between linear > > and rotary axes are defined > >Ray is right: EMC2 implements an XYZABC machine as the ngc spec >describes it: the XYZ are linear and the ABC are angular. However if >you set your LINEAR_UNITS and ANGULAR_UNITS to the same value, you'll >get behavior really close to what you want. > >For the nitty gritty details, have a look at > >http://www.linuxcnc.org/docs/2.1/html/gcode/main/index.html > >Especially note the "Feed Rate" section. If you want to get a certain >feed along the cut you might want to consider using inverse time feed >mode in your generated gcode, since EMC doesn't understand the >geometry of your machine. > >Chris
On all the controls I have worked with that had linear axes parallel to X,Y,Z they were labeled U,V,W these were wire EDM machines. On the machines I worked on the U,V axes were programmed as incremental distances from the programmed absolute X,Y position in the block, but that is not always true. More often I just program the X,Y position and an angle and let the control figure out what to do with the U,V also have to tell the control at what Z position it is to hold the programmed X,Y correct. ___________ Andre' B. __________ Andre' B. Clear Lake, Wi. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
