Steve Blackmore wrote: > On Sat, 7 Mar 2009 17:30:43 -0600, cradek wrote:
>> Many machines, especially lathes, use UVW as relative positions. For >> instance, G01 X1. W2. on a lathe will move X to 1 (absolute) while >> moving Z 2 relative units from where it started. >> (EMC doesn't do this.) > > What does EMC do? - You posted the following on 17th July 2007 EMC uses U, V, and W as additional axes, exactly as cradek posted in July of 2007. By default, U is parallel to X, V is parallel to Y, and W is parallel to Z. However on machines with rotary axes, it is possible to define U, V, and W to be in the tool coordinate system, so if you tilt the tool using B or C, you can drill a hole using W, rather than calculating a complex multi-axis move that is parallel to the (tilted) drill bit. The "this" in "EMC doesn't do this" is "using U, V, and W for relative positioning of the X, Y, and Z axes", exactly as stated immediately prior to that sentence. The message may have been a bit confusing, perhaps it would have been better to say: "Some controls (but not EMC) use UVW as relative postions." Regards, John Kasunich ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
