On Thu, Sep 02, 2010 at 05:15:10PM -0500, Igor Chudov wrote: > > So, basically, EMC2 can use Z and W simultaneously with themselves and > other axes, right? > > So I could say > > G1 X1 Y2 Z3 W4 F5 > > and it would move as would be expected?
Yes! As long as you expect the right thing, heh. The only trick here is what exactly F5 means. If you move Z and W at the same time, and they are parallel, the apparent feed of workpiece vs. tool is the sum/difference of the Z and W motions. EMC in the normal G94 units-per-minute mode works as described here: http://linuxcnc.org/docs/2.4/html/common_machining_center.html#sub:Feed-Rate When in doubt, use G93 inverse-time mode as the Best Practices section warns you: http://linuxcnc.org/docs/2.4/html/gcode_overview.html#r3_8 > This is reeeeeaaally exciting. > > I think that I would like my quill to be Z and the knee to be W. I would do it that way too. I think positive W would be the table moving downward. Perhaps W=0 would be all the way down, just like Z=0 is all the way up? I'd put my tool length offsets on W and use the quill for normal work. Using a knee mill like that I found that I only ran out of Z travel when I had tools of grossly different lengths. Then a tool change would be something like T2 M6 ;quill goes up and you load new tool G43 G0 W0 ;table moves up or down to adjust for new length ... then continue on cutting in XYZ (I'm pretty sure you should have 5 inches of quill on that machine - it's odd that you are only getting 4.8.) Also fun in this configuration: if you have a super deep hole to peck drill, you could change to G17.1 plane and do the G83 in W. You wouldn't want to peck drill too often with the knee I bet - it's going to be slow - but once in a while it might be very handy. Chris ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
