On Friday 21 August 2015 10:15:06 Craig Hodne wrote: > On 08/21/2015 02:43 AM, Gene Heskett <[email protected]> wrote: > > G1 F40 x(center of workpiece) y(offset to put tool at center of THIS > > circle) Z-8.828 (which is about 5 thou above the top surface of the > > workpiece as presently mounted) > > > > G92 x0 y0 z0 (subsequent motions s/b absolute moves from the present > > location as it has moved by the line above) > > > > Next move is a g1 f10 z-0.025 > > > > Error is "move exceeds negative limit on axis 2" The machine is > > sitting at the homed position nearly 9" up the post and the DRO says > > everything is at 0,0,0,0. But while I can move it anyplace in its > > envelope, the code can't lower it 25 thou? ? ? > > > > Since it doesn't physicly exceed the negative limit, and I can then > > run it by hand, downward at least another 1.25" by the time I hit > > the minimumas set in the ini file for axis 2, I have no other choice > > but to believe that the interpreter is NOT checking the present > > position against the value in the machines own G53 map. No clue > > what its checking with, but the .ini files limits are not being hit. > > Gene, I cannot help but wonder if you have a G43 code in your program > that, when acted, puts the tip of your tool outside the operating > envelope.
No G43 in this code, in fact my experiments with it have been less than usefull so its not in my gcode vocabulary. Neither is tool_rad offsets, so I also do those by hand in my gcode scriblings. > I have encountered this numerous times (although usually in > the + direction) when I establish my Z-zero before the tool is loaded. > Then when the G43 is enacted, there is insufficient headroom to > retract the tool tip above the work, causing me to re-set the machine. Humm, that could be a problem here since an R8 spud with a big drill chuck mounted is 2/3rds the vertical span of the machine. If I have a drill bit mounted and measured, I could easily hit the workpiece when its all the way up when trying to change the tool without running it to a safe place first. Its just a potential problem so far. ;-) Thanks Craig Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
